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| author | Ralf Baechle <ralf@linux-mips.org> | 2014-05-23 16:29:44 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-05-24 00:07:01 +0200 |
| commit | b633648c5ad3cfbda0b3daea50d2135d44899259 (patch) | |
| tree | 6100185cae10f36a55e71c3b220fc79cfa14b7c0 /arch/mips | |
| parent | 8b2e62cc34feaaf1cac9440a93fb18ac0b1e81bc (diff) | |
| download | linux-b633648c5ad3cfbda0b3daea50d2135d44899259.tar.gz linux-b633648c5ad3cfbda0b3daea50d2135d44899259.tar.bz2 linux-b633648c5ad3cfbda0b3daea50d2135d44899259.zip | |
MIPS: MT: Remove SMTC support
Nobody is maintaining SMTC anymore and there also seems to be no userbase.
Which is a pity - the SMTC technology primarily developed by Kevin D.
Kissell <kevink@paralogos.com> is an ingenious demonstration for the MT
ASE's power and elegance.
Based on Markos Chandras <Markos.Chandras@imgtec.com> patch
https://patchwork.linux-mips.org/patch/6719/ which while very similar did
no longer apply cleanly when I tried to merge it plus some additional
post-SMTC cleanup - SMTC was a feature as tricky to remove as it was to
merge once upon a time.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
64 files changed, 71 insertions, 4096 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 45e75b6173b5..e3f040cbaff3 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1852,7 +1852,7 @@ config FORCE_MAX_ZONEORDER config CEVT_GIC bool "Use GIC global counter for clock events" - depends on IRQ_GIC && !(MIPS_SEAD3 || MIPS_MT_SMTC) + depends on IRQ_GIC && !MIPS_SEAD3 help Use the GIC global counter for the clock events. The R4K clock event driver is always present, so if the platform ends up not @@ -1936,24 +1936,6 @@ config MIPS_MT_SMP Intel Hyperthreading feature. For further information go to <http://www.imgtec.com/mips/mips-multithreading.asp>. -config MIPS_MT_SMTC - bool "Use all TCs on all VPEs for SMP (DEPRECATED)" - depends on CPU_MIPS32_R2 - depends on SYS_SUPPORTS_MULTITHREADING - depends on !MIPS_CPS - select CPU_MIPSR2_IRQ_VI - select CPU_MIPSR2_IRQ_EI - select MIPS_MT - select SMP - select SMP_UP - select SYS_SUPPORTS_SMP - select NR_CPUS_DEFAULT_8 - help - This is a kernel model which is known as SMTC. This is - supported on cores with the MT ASE and presents all TCs - available on all VPEs to support SMP. For further - information see <http://www.linux-mips.org/wiki/34K#SMTC>. - endchoice config MIPS_MT @@ -1977,7 +1959,7 @@ config SYS_SUPPORTS_MULTITHREADING config MIPS_MT_FPAFF bool "Dynamic FPU affinity for FP-intensive threads" default y - depends on MIPS_MT_SMP || MIPS_MT_SMTC + depends on MIPS_MT_SMP config MIPS_VPE_LOADER bool "VPE loader support." @@ -1999,29 +1981,6 @@ config MIPS_VPE_LOADER_MT default "y" depends on MIPS_VPE_LOADER && !MIPS_CMP -config MIPS_MT_SMTC_IM_BACKSTOP - bool "Use per-TC register bits as backstop for inhibited IM bits" - depends on MIPS_MT_SMTC - default n - help - To support multiple TC microthreads acting as "CPUs" within - a VPE, VPE-wide interrupt mask bits must be specially manipulated - during interrupt handling. To support legacy drivers and interrupt - controller management code, SMTC has a "backstop" to track and - if necessary restore the interrupt mask. This has some performance - impact on interrupt service overhead. - -config MIPS_MT_SMTC_IRQAFF - bool "Support IRQ affinity API" - depends on MIPS_MT_SMTC - default n - help - Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.) - for SMTC Linux kernel. Requires platform support, of which - an example can be found in the MIPS kernel i8259 and Malta - platform code. Adds some overhead to interrupt dispatch, and - should be used only if you know what you are doing. - config MIPS_VPE_LOADER_TOM bool "Load VPE program into memory hidden from linux" depends on MIPS_VPE_LOADER @@ -2049,7 +2008,7 @@ config MIPS_VPE_APSP_API_MT config MIPS_CMP bool "MIPS CMP framework support (DEPRECATED)" - depends on SYS_SUPPORTS_MIPS_CMP && !MIPS_MT_SMTC + depends on SYS_SUPPORTS_MIPS_CMP select MIPS_GIC_IPI select SYNC_R4K select WEAK_ORDERING @@ -2256,7 +2215,7 @@ config NODES_SHIFT config HW_PERF_EVENTS bool "Enable hardware performance counter support for perf events" - depends on PERF_EVENTS && !MIPS_MT_SMTC && OPROFILE=n && (CPU_MIPS32 || CPU_MIPS64 || CPU_R10000 || CPU_SB1 || CPU_CAVIUM_OCTEON || CPU_XLP) + depends on PERF_EVENTS && OPROFILE=n && (CPU_MIPS32 || CPU_MIPS64 || CPU_R10000 || CPU_SB1 || CPU_CAVIUM_OCTEON || CPU_XLP) default y help Enable hardware performance counter support for perf events. If diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug index 25de29211d76..3a2b775e8458 100644 --- a/arch/mips/Kconfig.debug +++ b/arch/mips/Kconfig.debug @@ -79,15 +79,6 @@ config CMDLINE_OVERRIDE Normally, you will choose 'N' here. -config SMTC_IDLE_HOOK_DEBUG - bool "Enable additional debug checks before going into CPU idle loop" - depends on DEBUG_KERNEL && MIPS_MT_SMTC - help - This option enables Enable additional debug checks before going into - CPU idle loop. For details on these checks, see - arch/mips/kernel/smtc.c. This debugging option result in significant - overhead so should be disabled in production kernels. - config SB1XXX_CORELIS bool "Corelis Debugger" depends on SIBYTE_SB1xxx_SOC diff --git a/arch/mips/configs/maltasmtc_defconfig b/arch/mips/configs/maltasmtc_defconfig deleted file mode 100644 index eb316447588c..000000000000 --- a/arch/mips/configs/maltasmtc_defconfig +++ /dev/null @@ -1,196 +0,0 @@ -CONFIG_MIPS_MALTA=y -CONFIG_CPU_LITTLE_ENDIAN=y -CONFIG_CPU_MIPS32_R2=y -CONFIG_PAGE_SIZE_16KB=y -CONFIG_MIPS_MT_SMTC=y -# CONFIG_MIPS_MT_FPAFF is not set -CONFIG_NR_CPUS=9 -CONFIG_HZ_48=y -CONFIG_LOCALVERSION="smtc" -CONFIG_SYSVIPC=y -CONFIG_POSIX_MQUEUE=y -CONFIG_AUDIT=y -CONFIG_IKCONFIG=y -CONFIG_IKCONFIG_PROC=y -CONFIG_LOG_BUF_SHIFT=15 -CONFIG_SYSCTL_SYSCALL=y -CONFIG_EMBEDDED=y -CONFIG_SLAB=y -CONFIG_MODULES=y -CONFIG_MODULE_UNLOAD=y -CONFIG_MODVERSIONS=y -CONFIG_MODULE_SRCVERSION_ALL=y -# CONFIG_BLK_DEV_BSG is not set -CONFIG_PCI=y -# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set -CONFIG_NET=y -CONFIG_PACKET=y -CONFIG_UNIX=y -CONFIG_XFRM_USER=m -CONFIG_NET_KEY=y -CONFIG_INET=y -CONFIG_IP_MULTICAST=y -CONFIG_IP_ADVANCED_ROUTER=y -CONFIG_IP_MULTIPLE_TABLES=y -CONFIG_IP_ROUTE_MULTIPATH=y -CONFIG_IP_ROUTE_VERBOSE=y -CONFIG_IP_PNP=y -CONFIG_IP_PNP_DHCP=y -CONFIG_IP_PNP_BOOTP=y -CONFIG_NET_IPIP=m -CONFIG_IP_MROUTE=y -CONFIG_IP_PIMSM_V1=y -CONFIG_IP_PIMSM_V2=y -CONFIG_SYN_COOKIES=y -CONFIG_INET_AH=m -CONFIG_INET_ESP=m -CONFIG_INET_IPCOMP=m -# CONFIG_INET_LRO is not set -CONFIG_INET6_AH=m -CONFIG_INET6_ESP=m -CONFIG_INET6_IPCOMP=m -CONFIG_IPV6_TUNNEL=m -CONFIG_BRIDGE=m -CONFIG_VLAN_8021Q=m -CONFIG_ATALK=m -CONFIG_DEV_APPLETALK=m -CONFIG_IPDDP=m -CONFIG_IPDDP_ENCAP=y -CONFIG_NET_SCHED=y -CONFIG_NET_SCH_CBQ=m -CONFIG_NET_SCH_HTB=m -CONFIG_NET_SCH_HFSC=m -CONFIG_NET_SCH_PRIO=m -CONFIG_NET_SCH_RED=m -CONFIG_NET_SCH_SFQ=m -CONFIG_NET_SCH_TEQL=m -CONFIG_NET_SCH_TBF=m -CONFIG_NET_SCH_GRED=m -CONFIG_NET_SCH_DSMARK=m -CONFIG_NET_SCH_NETEM=m -CONFIG_NET_SCH_INGRESS=m -CONFIG_NET_CLS_BASIC=m -CONFIG_NET_CLS_TCINDEX=m -CONFIG_NET_CLS_ROUTE4=m -CONFIG_NET_CLS_FW=m -CONFIG_NET_CLS_U32=m -CONFIG_NET_CLS_RSVP=m -CONFIG_NET_CLS_RSVP6=m -CONFIG_NET_CLS_ACT=y -CONFIG_NET_ACT_POLICE=y -CONFIG_NET_CLS_IND=y -# CONFIG_WIRELESS is not set -CONFIG_DEVTMPFS=y -CONFIG_BLK_DEV_LOOP=y -CONFIG_BLK_DEV_CRYPTOLOOP=m -CONFIG_IDE=y -# CONFIG_IDE_PROC_FS is not set -# CONFIG_IDEPCI_PCIBUS_ORDER is not set -CONFIG_BLK_DEV_GENERIC=y -CONFIG_BLK_DEV_PIIX=y -CONFIG_SCSI=y -CONFIG_BLK_DEV_SD=y -CONFIG_CHR_DEV_SG=y -# CONFIG_SCSI_LOWLEVEL is not set -CONFIG_NETDEVICES=y -# CONFIG_NET_VENDOR_3COM is not set -# CONFIG_NET_VENDOR_ADAPTEC is not set -# CONFIG_NET_VENDOR_ALTEON is not set -CONFIG_PCNET32=y -# CONFIG_NET_VENDOR_ATHEROS is not set -# CONFIG_NET_VENDOR_BROADCOM is not set -# CONFIG_NET_VENDOR_BROCADE is not set -# CONFIG_NET_VENDOR_CHELSIO is not set -# CONFIG_NET_VENDOR_CISCO is not set -# CONFIG_NET_VENDOR_DEC is not set -# CONFIG_NET_VENDOR_DLINK is not set -# CONFIG_NET_VENDOR_EMULEX is not set -# CONFIG_NET_VENDOR_EXAR is not set -# CONFIG_NET_VENDOR_HP is not set -# CONFIG_NET_VENDOR_INTEL is not set -# CONFIG_NET_VENDOR_MARVELL is not set -# CONFIG_NET_VENDOR_MELLANOX is not set -# CONFIG_NET_VENDOR_MICREL is not set -# CONFIG_NET_VENDOR_MYRI is not set -# CONFIG_NET_VENDOR_NATSEMI is not set -# CONFIG_NET_VENDOR_NVIDIA is not set -# CONFIG_NET_VENDOR_OKI is not set -# CONFIG_NET_PACKET_ENGINE is not set -# CONFIG_NET_VENDOR_QLOGIC is not set -# CONFIG_NET_VENDOR_REALTEK is not set -# CONFIG_NET_VENDOR_RDC is not set -# CONFIG_NET_VENDOR_SEEQ is not set -# CONFIG_NET_VENDOR_SILAN is not set -# CONFIG_NET_VENDOR_SIS is not set -# CONFIG_NET_VENDOR_SMSC is not set -# CONFIG_NET_VENDOR_STMICRO is not set -# CONFIG_NET_VENDOR_SUN is not set -# CONFIG_NET_VENDOR_TEHUTI is not set -# CONFIG_NET_VENDOR_TI is not set -# CONFIG_NET_VENDOR_TOSHIBA is not set -# CONFIG_NET_VENDOR_VIA is not set -# CONFIG_WLAN is not set -# CONFIG_VT is not set -CONFIG_LEGACY_PTY_COUNT=16 -CONFIG_SERIAL_8250=y -CONFIG_SERIAL_8250_CONSOLE=y -CONFIG_HW_RANDOM=y -# CONFIG_HWMON is not set -CONFIG_VIDEO_OUTPUT_CONTROL=m -CONFIG_FB=y -CONFIG_FIRMWARE_EDID=y -CONFIG_FB_MATROX=y -CONFIG_FB_MATROX_G=y -CONFIG_USB=y -CONFIG_USB_EHCI_HCD=y -# CONFIG_USB_EHCI_TT_NEWSCHED is not set -CONFIG_USB_UHCI_HCD=y -CONFIG_USB_STORAGE=y -CONFIG_NEW_LEDS=y -CONFIG_LEDS_CLASS=y -CONFIG_LEDS_TRIGGERS=y -CONFIG_LEDS_TRIGGER_TIMER=y -CONFIG_LEDS_TRIGGER_IDE_DISK=y -CONFIG_LEDS_TRIGGER_HEARTBEAT=y -CONFIG_LEDS_TRIGGER_BACKLIGHT=y -CONFIG_LEDS_TRIGGER_DEFAULT_ON=y -CONFIG_RTC_CLASS=y -CONFIG_RTC_DRV_CMOS=y -CONFIG_EXT2_FS=y -CONFIG_EXT3_FS=y -# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set -CONFIG_XFS_FS=y -CONFIG_XFS_QUOTA=y -CONFIG_XFS_POSIX_ACL=y -CONFIG_QUOTA=y -CONFIG_QFMT_V2=y -CONFIG_MSDOS_FS=m -CONFIG_VFAT_FS=m -CONFIG_PROC_KCORE=y -CONFIG_TMPFS=y -CONFIG_NFS_FS=y -CONFIG_ROOT_NFS=y -CONFIG_CIFS=m -CONFIG_CIFS_WEAK_PW_HASH=y -CONFIG_CIFS_XATTR=y -CONFIG_CIFS_POSIX=y -CONFIG_NLS_CODEPAGE_437=m -CONFIG_NLS_ISO8859_1=m -# CONFIG_FTRACE is not set -CONFIG_CRYPTO_NULL=m -CONFIG_CRYPTO_PCBC=m -CONFIG_CRYPTO_HMAC=y -CONFIG_CRYPTO_MICHAEL_MIC=m -CONFIG_CRYPTO_SHA512=m -CONFIG_CRYPTO_TGR192=m -CONFIG_CRYPTO_WP512=m -CONFIG_CRYPTO_ANUBIS=m -CONFIG_CRYPTO_BLOWFISH=m -CONFIG_CRYPTO_CAST5=m -CONFIG_CRYPTO_CAST6=m -CONFIG_CRYPTO_KHAZAD=m -CONFIG_CRYPTO_SERPENT=m -CONFIG_CRYPTO_TEA=m -CONFIG_CRYPTO_TWOFISH=m -# CONFIG_CRYPTO_ANSI_CPRNG is not set -# CONFIG_CRYPTO_HW is not set diff --git a/arch/mips/include/asm/asmmacro.h b/arch/mips/include/asm/asmmacro.h index b464b8b1147a..f7db79a846bb 100644 --- a/arch/mips/include/asm/asmmacro.h +++ b/arch/mips/include/asm/asmmacro.h @@ -17,26 +17,8 @@ #ifdef CONFIG_64BIT #include <asm/asmmacro-64.h> #endif -#ifdef CONFIG_MIPS_MT_SMTC -#include <asm/mipsmtregs.h> -#endif - -#ifdef CONFIG_MIPS_MT_SMTC - .macro local_irq_enable reg=t0 - mfc0 \reg, CP0_TCSTATUS - ori \reg, \reg, TCSTATUS_IXMT - xori \reg, \reg, TCSTATUS_IXMT - mtc0 \reg, CP0_TCSTATUS - _ehb - .endm - .macro local_irq_disable reg=t0 - mfc0 \reg, CP0_TCSTATUS - ori \reg, \reg, TCSTATUS_IXMT - mtc0 \reg, CP0_TCSTATUS - _ehb - .endm -#elif defined(CONFIG_CPU_MIPSR2) +#ifdef CONFIG_CPU_MIPSR2 .macro local_irq_enable reg=t0 ei irq_enable_hazard @@ -71,7 +53,7 @@ sw \reg, TI_PRE_COUNT($28) #endif .endm -#endif /* CONFIG_MIPS_MT_SMTC */ +#endif /* CONFIG_CPU_MIPSR2 */ .macro fpu_save_16even thread tmp=t0 cfc1 \tmp, fcr31 diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h index dc2135be2a3a..7ba0e07a9091 100644 --- a/arch/mips/include/asm/cpu-info.h +++ b/arch/mips/include/asm/cpu-info.h @@ -65,18 +65,13 @@ struct cpuinfo_mips { #ifdef CONFIG_64BIT int vmbits; /* Virtual memory size in bits */ #endif -#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_MIPS_MT_SMP /* - * In the MIPS MT "SMTC" model, each TC is considered - * to be a "CPU" for the purposes of scheduling, but - * exception resources, ASID spaces, etc, are common - * to all TCs within the same VPE. + * There is not necessarily a 1:1 mapping of VPE num to CPU number + * in particular on multi-core systems. */ int vpe_id; /* Virtual Processor number */ #endif -#ifdef CONFIG_MIPS_MT_SMTC - int tc_id; /* Thread Context number */ -#endif void *data; /* Additional data */ unsigned int watch_reg_count; /* Number that exist */ unsigned int watch_reg_use_cnt; /* Usable by ptrace */ @@ -117,7 +112,7 @@ struct proc_cpuinfo_notifier_args { unsigned long n; }; -#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_MIPS_MT_SMP # define cpu_vpe_id(cpuinfo) ((cpuinfo)->vpe_id) #else # define cpu_vpe_id(cpuinfo) 0 diff --git a/arch/mips/include/asm/fixmap.h b/arch/mips/include/asm/fixmap.h index 8c012af2f451..6842ffafd1e7 100644 --- a/arch/mips/include/asm/fixmap.h +++ b/arch/mips/include/asm/fixmap.h @@ -48,11 +48,7 @@ enum fixed_addresses { #define FIX_N_COLOURS 8 FIX_CMAP_BEGIN, -#ifdef CONFIG_MIPS_MT_SMTC - FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS * 2), -#else FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * 2), -#endif #ifdef CONFIG_HIGHMEM /* reserved pte's for temporary kernel mappings */ FIX_KMAP_BEGIN = FIX_CMAP_END + 1, diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h index 7bc2cdb35057..ae1f7b24dd1a 100644 --- a/arch/mips/include/asm/irq.h +++ b/arch/mips/include/asm/irq.h @@ -26,104 +26,8 @@ static inline int irq_canonicalize(int irq) #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ #endif -#ifdef CONFIG_MIPS_MT_SMTC - -struct irqaction; - -extern unsigned long irq_hwmask[]; -extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, - unsigned long hwmask); - -static inline void smtc_im_ack_irq(unsigned int irq) -{ - if (irq_hwmask[irq] & ST0_IM) - set_c0_status(irq_hwmask[irq] & ST0_IM); -} - -#else - -static inline void smtc_im_ack_irq(unsigned int irq) -{ -} - -#endif /* CONFIG_MIPS_MT_SMTC */ - -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF -#include <linux/cpumask.h> - -extern int plat_set_irq_affinity(struct irq_data *d, - const struct cpumask *affinity, bool force); -extern void smtc_forward_irq(struct irq_data *d); - -/* - * IRQ affinity hook invoked at the beginning of interrupt dispatch - * if option is enabled. - * - * Up through Linux 2.6.22 (at least) cpumask operations are very - * inefficient on MIPS. Initial prototypes of SMTC IRQ affinity - * used a "fast path" per-IRQ-descriptor cache of affinity information - * to reduce latency. As there is a project afoot to optimize the - * cpumask implementations, this version is optimistically assuming - * that cpumask.h macro overhead is reasonable during interrupt dispatch. - */ -static inline int handle_on_other_cpu(unsigned int irq) -{ - struct irq_data *d = irq_get_irq_data(irq); - - if (cpumask_test_cpu(smp_processor_id(), d->affinity)) - return 0; - smtc_forward_irq(d); - return 1; -} - -#else /* Not doing SMTC affinity */ - -static inline int handle_on_other_cpu(unsigned int irq) { return 0; } - -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ - -#ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP - -static inline void smtc_im_backstop(unsigned int irq) -{ - if (irq_hwmask[irq] & 0x0000ff00) - write_c0_tccontext(read_c0_tccontext() & - ~(irq_hwmask[irq] & 0x0000ff00)); -} - -/* - * Clear interrupt mask handling "backstop" if irq_hwmask - * entry so indicates. This implies that the ack() or end() - * functions will take over re-enabling the low-level mask. - * Otherwise it will be done on return from exception. - */ -static inline int smtc_handle_on_other_cpu(unsigned int irq) -{ - int ret = handle_on_other_cpu(irq); - - if (!ret) - smtc_im_backstop(irq); - return ret; -} - -#else - -static inline void smtc_im_backstop(unsigned int irq) { } -static inline int smtc_handle_on_other_cpu(unsigned int irq) -{ - return handle_on_other_cpu(irq); -} - -#endif - extern void do_IRQ(unsigned int irq); -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF - -extern void do_IRQ_no_affinity(unsigned int irq); - -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ - extern void arch_init_irq(void); extern void spurious_interrupt(void); diff --git a/arch/mips/include/asm/irqflags.h b/arch/mips/include/asm/irqflags.h index 45c00951888b..0fa5fdcd1f01 100644 --- a/arch/mips/include/asm/irqflags.h +++ b/arch/mips/include/asm/irqflags.h @@ -17,7 +17,7 @@ #include <linux/stringify.h> #include <asm/hazards.h> -#if defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_CPU_MIPSR2 static inline void arch_local_irq_disable(void) { @@ -118,30 +118,15 @@ void arch_local_irq_disable(void); unsigned long arch_local_irq_save(void); void arch_local_irq_restore(unsigned long flags); void __arch_local_irq_restore(unsigned long flags); -#endif /* if defined(CONFIG_CPU_MIPSR2) && !defined(CONFIG_MIPS_MT_SMTC) */ - - -extern void smtc_ipi_replay(void); +#endif /* CONFIG_CPU_MIPSR2 */ static inline void arch_local_irq_enable(void) { -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC kernel needs to do a software replay of queued - * IPIs, at the cost of call overhead on each local_irq_enable() - */ - smtc_ipi_replay(); -#endif __asm__ __volatile__( " .set push \n" " .set reorder \n" " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 $1, $2, 1 # SMTC - clear TCStatus.IXMT \n" - " ori $1, 0x400 \n" - " xori $1, 0x400 \n" - " mtc0 $1, $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) +#if defined(CONFIG_CPU_MIPSR2) " ei \n" #else " mfc0 $1,$12 \n" @@ -163,11 +148,7 @@ static inline unsigned long arch_local_save_flags(void) asm __volatile__( " .set push \n" " .set reorder \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 %[flags], $2, 1 \n" -#else " mfc0 %[flags], $12 \n" -#endif " .set pop \n" : [flags] "=r" (flags)); @@ -177,14 +158,7 @@ static inline unsigned long arch_local_save_flags(void) static inline int arch_irqs_disabled_flags(unsigned long flags) { -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC model uses TCStatus.IXMT to disable interrupts for a thread/CPU - */ - return flags & 0x400; -#else return !(flags & 1); -#endif } #endif /* #ifndef __ASSEMBLY__ */ diff --git a/arch/mips/include/asm/mach-malta/kernel-entry-init.h b/arch/mips/include/asm/mach-malta/kernel-entry-init.h index 7c5e17a17849..77eeda77e73c 100644 --- a/arch/mips/include/asm/mach-malta/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-malta/kernel-entry-init.h @@ -80,36 +80,6 @@ .endm .macro kernel_entry_setup -#ifdef CONFIG_MIPS_MT_SMTC - mfc0 t0, CP0_CONFIG - bgez t0, 9f - mfc0 t0, CP0_CONFIG, 1 - bgez t0, 9f - mfc0 t0, CP0_CONFIG, 2 - bgez t0, 9f - mfc0 t0, CP0_CONFIG, 3 - and t0, 1<<2 - bnez t0, 0f -9: - /* Assume we came from YAMON... */ - PTR_LA v0, 0x9fc00534 /* YAMON print */ - lw v0, (v0) - move a0, zero - PTR_LA a1, nonmt_processor - jal v0 - - PTR_LA v0, 0x9fc00520 /* YAMON exit */ - lw v0, (v0) - li a0, 1 - jal v0 - -1: b 1b - - __INITDATA -nonmt_processor: - .asciz "SMTC kernel requires the MT ASE to run\n" - __FINIT -#endif #ifdef CONFIG_EVA sync diff --git a/arch/mips/include/asm/mach-sead3/kernel-entry-init.h b/arch/mips/include/asm/mach-sead3/kernel-entry-init.h index 3dfbd8e7947f..6cccd4d558d7 100644 --- a/arch/mips/include/asm/mach-sead3/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-sead3/kernel-entry-init.h @@ -10,37 +10,6 @@ #define __ASM_MACH_MIPS_KERNEL_ENTRY_INIT_H .macro kernel_entry_setup -#ifdef CONFIG_MIPS_MT_SMTC - mfc0 t0, CP0_CONFIG - bgez t0, 9f - mfc0 t0, CP0_CONFIG, 1 - bgez t0, 9f - mfc0 t0, CP0_CONFIG, 2 - bgez t0, 9f - mfc0 t0, CP0_CONFIG, 3 - and t0, 1<<2 - bnez t0, 0f -9 : - /* Assume we came from YAMON... */ - PTR_LA v0, 0x9fc00534 /* YAMON print */ - lw v0, (v0) - move a0, zero - PTR_LA a1, nonmt_processor - jal v0 - - PTR_LA v0, 0x9fc00520 /* YAMON exit */ - lw v0, (v0) - li a0, 1 - jal v0 - -1 : b 1b - - __INITDATA -nonmt_processor : - .asciz "SMTC kernel requires the MT ASE to run\n" - __FINIT -0 : -#endif .endm /* diff --git a/arch/mips/include/asm/mips_mt.h b/arch/mips/include/asm/mips_mt.h index a3df0c3faa0e..f6ba004a7711 100644 --- a/arch/mips/include/asm/mips_mt.h +++ b/arch/mips/include/asm/mips_mt.h @@ -1,7 +1,6 @@ /* - * Definitions and decalrations for MIPS MT support - * that are common between SMTC, VSMP, and/or AP/SP - * kernel models. + * Definitions and decalrations for MIPS MT support that are common between + * the VSMP, and AP/SP kernel models. */ #ifndef __ASM_MIPS_MT_H #define __ASM_MIPS_MT_H diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index 88e30d5022b3..fb2d17487ec2 100644 --- a/arch/mips/include/asm/mipsregs.h +++ b/arch/mips/include/asm/mipsregs.h @@ -1014,19 +1014,8 @@ do { \ #define write_c0_compare3(val) __write_32bit_c0_register($11, 7, val) #define read_c0_status() __read_32bit_c0_register($12, 0) -#ifdef CONFIG_MIPS_MT_SMTC -#define write_c0_status(val) \ -do { \ - __write_32bit_c0_register($12, 0, val); \ - __ehb(); \ -} while (0) -#else -/* - * Legacy non-SMTC code, which may be hazardous - * but which might not support EHB - */ + #define write_c0_status(val) __write_32bit_c0_register($12, 0, val) -#endif /* CONFIG_MIPS_MT_SMTC */ #define read_c0_cause() __read_32bit_c0_register($13, 0) #define write_c0_cause(val) __write_32bit_c0_register($13, 0, val) @@ -1750,11 +1739,6 @@ static inline void tlb_write_random(void) /* * Manipulate bits in a c0 register. */ -#ifndef CONFIG_MIPS_MT_SMTC -/* - * SMTC Linux requires shutting-down microthread scheduling - * during CP0 register read-modify-write sequences. - */ #define __BUILD_SET_C0(name) \ static inline unsigned int \ set_c0_##name(unsigned int set) \ @@ -1793,121 +1777,6 @@ change_c0_##name(unsigned int change, unsigned int val) \ return res; \ } -#else /* SMTC versions that manage MT scheduling */ - -#include <linux/irqflags.h> - -/* - * This is a duplicate of dmt() in mipsmtregs.h to avoid problems with - * header file recursion. - */ -static inline unsigned int __dmt(void) -{ - int res; - - __asm__ __volatile__( - " .set push \n" - " .set mips32r2 \n" - " .set noat \n" - " .word 0x41610BC1 # dmt $1 \n" - " ehb \n" - " move %0, $1 \n" - " .set pop \n" - : "=r" (res)); - - instruction_hazard(); - - return res; -} - -#define __VPECONTROL_TE_SHIFT 15 -#define __VPECONTROL_TE (1UL << __VPECONTROL_TE_SHIFT) - -#define __EMT_ENABLE __VPECONTROL_TE - -static inline void __emt(unsigned int previous) -{ - if ((previous & __EMT_ENABLE)) - __asm__ __volatile__( - " .set mips32r2 \n" - " .word 0x41600be1 # emt \n" - " ehb \n" - " .set mips0 \n"); -} - -static inline void __ehb(void) -{ - __asm__ __volatile__( - " .set mips32r2 \n" - " ehb \n" " .set mips0 \n"); -} - -/* - * Note that local_irq_save/restore affect TC-specific IXMT state, - * not Status.IE as in non-SMTC kernel. - */ - -#define __BUILD_SET_C0(name) \ -static inline unsigned int \ -set_c0_##name(unsigned int set) \ -{ \ - unsigned int res; \ - unsigned int new; \ - unsigned int omt; \ - unsigned long flags; \ - \ - local_irq_save(flags); \ - omt = __dmt(); \ - res = read_c0_##name(); \ - new = res | set; \ - write_c0_##name(new); \ - __emt(omt); \ - local_irq_restore(flags); \ - \ - return res; \ -} \ - \ -static inline unsigned int \ -clear_c0_##name(unsigned int clear) \ -{ \ - unsigned int res; \ - unsigned int new; \ - unsigned int omt; \ - unsigned long flags; \ - \ - local_irq_save(flags); \ - omt = __dmt(); \ - res = read_c0_##name(); \ - new = res & ~clear; \ - write_c0_##name(new); \ - __emt(omt); \ - local_irq_restore(flags); \ - \ - return res; \ -} \ - \ -static inline unsigned int \ -change_c0_##name(unsigned int change, unsigned int newbits) \ -{ \ - unsigned int res; \ - unsigned int new; \ - unsigned int omt; \ - unsigned long flags; \ - \ - local_irq_save(flags); \ - \ - omt = __dmt(); \ - res = read_c0_##name(); \ - new = res & ~change; \ - new |= (newbits & change); \ - write_c0_##name(new); \ - __emt(omt); \ - local_irq_restore(flags); \ - \ - return res; \ -} -#endif - __BUILD_SET_C0(status) __BUILD_SET_C0(cause) __BUILD_SET_C0(config) diff --git a/arch/mips/include/asm/mmu_context.h b/arch/mips/include/asm/mmu_context.h index e277bbad2871..0f75aaca201b 100644 --- a/arch/mips/include/asm/mmu_context.h +++ b/arch/mips/include/asm/mmu_context.h @@ -18,10 +18,6 @@ #include <asm/cacheflush.h> #include <asm/hazards.h> #include <asm/tlbflush.h> -#ifdef CONFIG_MIPS_MT_SMTC -#include <asm/mipsmtregs.h> -#include <asm/smtc.h> -#endif /* SMTC */ #include <asm-generic/mm_hooks.h> #define TLBMISS_HANDLER_SETUP_PGD(pgd) \ @@ -63,13 +59,6 @@ extern unsigned long pgd_current[]; #define ASID_INC 0x10 #define ASID_MASK 0xff0 -#elif defined(CONFIG_MIPS_MT_SMTC) - -#define ASID_INC 0x1 -extern unsigned long smtc_asid_mask; -#define ASID_MASK (smtc_asid_mask) -#define HW_ASID_MASK 0xff -/* End SMTC/34K debug hack */ #else /* FIXME: not correct for R6000 */ #define ASID_INC 0x1 @@ -92,7 +81,6 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) #define ASID_VERSION_MASK ((unsigned long)~(ASID_MASK|(ASID_MASK-1))) #define ASID_FIRST_VERSION ((unsigned long)(~ASID_VERSION_MASK) + 1) -#ifndef CONFIG_MIPS_MT_SMTC /* Normal, classic MIPS get_new_mmu_context */ static inline void get_new_mmu_context(struct mm_struct *mm, unsigned long cpu) @@ -115,12 +103,6 @@ get_new_mmu_context(struct mm_struct *mm, unsigned long cpu) cpu_context(cpu, mm) = asid_cache(cpu) = asid; } -#else /* CONFIG_MIPS_MT_SMTC */ - -#define get_new_mmu_context(mm, cpu) smtc_get_new_mmu_context((mm), (cpu)) - -#endif /* CONFIG_MIPS_MT_SMTC */ - /* * Initialize the context related info for a new mm_struct * instance. @@ -141,46 +123,12 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, { unsigned int cpu = smp_processor_id(); unsigned long flags; -#ifdef CONFIG_MIPS_MT_SMTC - unsigned long oldasid; - unsigned long mtflags; - int mytlb = (smtc_status & SMTC_TLB_SHARED) ? 0 : cpu_data[cpu].vpe_id; - local_irq_save(flags); - mtflags = dvpe(); -#else /* Not SMTC */ local_irq_save(flags); -#endif /* CONFIG_MIPS_MT_SMTC */ /* Check if our ASID is of an older version and thus invalid */ if ((cpu_context(cpu, next) ^ asid_cache(cpu)) & ASID_VERSION_MASK) get_new_mmu_context(next, cpu); -#ifdef CONFIG_MIPS_MT_SMTC - /* - * If the EntryHi ASID being replaced happens to be - * the value flagged at ASID recycling time as having - * an extended life, clear the bit showing it being - * in use by this "CPU", and if that's the last bit, - * free up the ASID value for use and flush any old - * instances of it from the TLB. - */ - oldasid = (read_c0_entryhi() & ASID_MASK); - if(smtc_live_asid[mytlb][oldasid]) { - smtc_live_asid[mytlb][oldasid] &= ~(0x1 << cpu); - if(smtc_live_asid[mytlb][oldasid] == 0) - smtc_flush_tlb_asid(oldasid); - } - /* - * Tread softly on EntryHi, and so long as we support - * having ASID_MASK smaller than the hardware maximum, - * make sure no "soft" bits become "hard"... - */ - write_c0_entryhi((read_c0_entryhi() & ~HW_ASID_MASK) | - cpu_asid(cpu, next)); - ehb(); /* Make sure it propagates to TCStatus */ - evpe(mtflags); -#else write_c0_entryhi(cpu_asid(cpu, next)); -#endif /* CONFIG_MIPS_MT_SMTC */ TLBMISS_HANDLER_SETUP_PGD(next->pgd); /* @@ -213,34 +161,12 @@ activate_mm(struct mm_struct *prev, struct mm_struct *next) unsigned long flags; unsigned int cpu = smp_processor_id(); -#ifdef CONFIG_MIPS_MT_SMTC - unsigned long oldasid; - unsigned long mtflags; - int mytlb = (smtc_status & SMTC_TLB_SHARED) ? 0 : cpu_data[cpu].vpe_id; -#endif /* CONFIG_MIPS_MT_SMTC */ - local_irq_save(flags); /* Unconditionally get a new ASID. */ get_new_mmu_context(next, cpu); -#ifdef CONFIG_MIPS_MT_SMTC - /* See comments for similar code above */ - mtflags = dvpe(); - oldasid = read_c0_entryhi() & ASID_MASK; - if(smtc_live_asid[mytlb][oldasid]) { - smtc_live_asid[mytlb][oldasid] &= ~(0x1 << cpu); - if(smtc_live_asid[mytlb][oldasid] == 0) - smtc_flush_tlb_asid(oldasid); - } - /* See comments for similar code above */ - write_c0_entryhi((read_c0_entryhi() & ~HW_ASID_MASK) | - cpu_asid(cpu, next)); - ehb(); /* Make sure it propagates to TCStatus */ - evpe(mtflags); -#else write_c0_entryhi(cpu_asid(cpu, next)); -#endif /* CONFIG_MIPS_MT_SMTC */ TLBMISS_HANDLER_SETUP_PGD(next->pgd); /* mark mmu ownership change */ @@ -258,48 +184,15 @@ static inline void drop_mmu_context(struct mm_struct *mm, unsigned cpu) { unsigned long flags; -#ifdef CONFIG_MIPS_MT_SMTC - unsigned long oldasid; - /* Can't use spinlock because called from TLB flush within DVPE */ - unsigned int prevvpe; - int mytlb = (smtc_status & SMTC_TLB_SHARED) ? 0 : cpu_data[cpu].vpe_id; -#endif /* CONFIG_MIPS_MT_SMTC */ local_irq_save(flags); if (cpumask_test_cpu(cpu, mm_cpumask(mm))) { get_new_mmu_context(mm, cpu); -#ifdef CONFIG_MIPS_MT_SMTC - /* See comments for similar code above */ - prevvpe = dvpe(); - oldasid = (read_c0_entryhi() & ASID_MASK); - if (smtc_live_asid[mytlb][oldasid]) { - smtc_live_asid[mytlb][oldasid] &= ~(0x1 << cpu); - if(smtc_live_asid[mytlb][oldasid] == 0) - smtc_flush_tlb_asid(oldasid); - } - /* See comments for similar code above */ - write_c0_entryhi((read_c0_entryhi() & ~HW_ASID_MASK) - | cpu_asid(cpu, mm)); - ehb(); /* Make sure it propagates to TCStatus */ - evpe(prevvpe); -#else /* not CONFIG_MIPS_MT_SMTC */ write_c0_entryhi(cpu_asid(cpu, mm)); -#endif /* CONFIG_MIPS_MT_SMTC */ } else { /* will get a new context next time */ -#ifndef CONFIG_MIPS_MT_SMTC cpu_context(cpu, mm) = 0; -#else /* SMTC */ - int i; - - /* SMTC shares the TLB (and ASIDs) across VPEs */ - for_each_online_cpu(i) { - if((smtc_status & SMTC_TLB_SHARED) - || (cpu_data[i].vpe_id == cpu_data[cpu].vpe_id)) - cpu_context(i, mm) = 0; - } -#endif /* CONFIG_MIPS_MT_SMTC */ } local_irq_restore(flags); } diff --git a/arch/mips/include/asm/module.h b/arch/mips/include/asm/module.h index c2edae382d5d..800fe578dc99 100644 --- a/arch/mips/include/asm/module.h +++ b/arch/mips/include/asm/module.h @@ -144,13 +144,7 @@ search_module_dbetables(unsigned long addr) #define MODULE_KERNEL_TYPE "64BIT " #endif -#ifdef CONFIG_MIPS_MT_SMTC -#define MODULE_KERNEL_SMTC "MT_SMTC " -#else -#define MODULE_KERNEL_SMTC "" -#endif - #define MODULE_ARCH_VERMAGIC \ - MODULE_PROC_FAMILY MODULE_KERNEL_TYPE MODULE_KERNEL_SMTC + MODULE_PROC_FAMILY MODULE_KERNEL_TYPE #endif /* _ASM_MODULE_H */ diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h index bf1ac8d35783..7e6e682aece3 100644 --- a/arch/mips/include/asm/ptrace.h +++ b/arch/mips/include/asm/ptrace.h @@ -39,9 +39,6 @@ struct pt_regs { unsigned long cp0_badvaddr; unsigned long cp0_cause; unsigned long cp0_epc; -#ifdef CONFIG_MIPS_MT_SMTC - unsigned long cp0_tcstatus; -#endif /* CONFIG_MIPS_MT_SMTC */ #ifdef CONFIG_CPU_CAVIUM_OCTEON unsigned long long mpl[3]; /* MTM{0,1,2} */ unsigned long long mtp[3]; /* MTP{0,1,2} */ diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h index ca64cbe44493..fe8d1b622477 100644 --- a/arch/mips/include/asm/r4kcache.h +++ b/arch/mips/include/asm/r4kcache.h @@ -43,11 +43,10 @@ : "i" (op), "R" (*(unsigned char *)(addr))) #ifdef CONFIG_MIPS_MT + /* - * Temporary hacks for SMTC debug. Optionally force single-threaded - * execution during I-cache flushes. + * Optionally force single-threaded execution during I-cache flushes. */ - #define PROTECT_CACHE_FLUSHES 1 #ifdef PROTECT_CACHE_FLUSHES diff --git a/arch/mips/include/asm/smtc.h b/arch/mips/include/asm/smtc.h deleted file mode 100644 index e56b439b7871..000000000000 --- a/arch/mips/include/asm/smtc.h +++ /dev/null @@ -1,78 +0,0 @@ -#ifndef _ASM_SMTC_MT_H -#define _ASM_SMTC_MT_H - -/* - * Definitions for SMTC multitasking on MIPS MT cores - */ - -#include <asm/mips_mt.h> -#include <asm/smtc_ipi.h> - -/* - * System-wide SMTC status information - */ - -extern unsigned int smtc_status; - -#define SMTC_TLB_SHARED 0x00000001 -#define SMTC_MTC_ACTIVE 0x00000002 - -/* - * TLB/ASID Management information - */ - -#define MAX_SMTC_TLBS 2 -#define MAX_SMTC_ASIDS 256 -#if NR_CPUS <= 8 -typedef char asiduse; -#else -#if NR_CPUS <= 16 -typedef short asiduse; -#else -typedef long asiduse; -#endif -#endif - -/* - * VPE Management information - */ - -#define MAX_SMTC_VPES MAX_SMTC_TLBS /* FIXME: May not always be true. */ - -extern asiduse smtc_live_asid[MAX_SMTC_TLBS][MAX_SMTC_ASIDS]; - -struct mm_struct; -struct task_struct; - -void smtc_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu); -void self_ipi(struct smtc_ipi *); -void smtc_flush_tlb_asid(unsigned long asid); -extern int smtc_build_cpu_map(int startslot); -extern void smtc_prepare_cpus(int cpus); -extern void smtc_smp_finish(void); -extern void smtc_boot_secondary(int cpu, struct task_struct *t); -extern void smtc_cpus_done(void); -extern void smtc_init_secondary(void); - - -/* - * Sharing the TLB between multiple VPEs means that the - * "random" index selection function is not allowed to - * select the current value of the Index register. To - * avoid additional TLB pressure, the Index registers - * are "parked" with an non-Valid value. - */ - -#define PARKED_INDEX ((unsigned int)0x80000000) - -/* - * Define low-level interrupt mask for IPIs, if necessary. - * By default, use SW interrupt 1, which requires no external - * hardware support, but which works only for single-core - * MIPS MT systems. - */ -#ifndef MIPS_CPU_IPI_IRQ -#define MIPS_CPU_IPI_IRQ 1 -#endif - -#endif /* _ASM_SMTC_MT_H */ diff --git a/arch/mips/include/asm/smtc_ipi.h b/arch/mips/include/asm/smtc_ipi.h deleted file mode 100644 index 15278dbd7e79..000000000000 --- a/arch/mips/include/asm/smtc_ipi.h +++ /dev/null @@ -1,129 +0,0 @@ -/* - * Definitions used in MIPS MT SMTC "Interprocessor Interrupt" code. - */ -#ifndef __ASM_SMTC_IPI_H -#define __ASM_SMTC_IPI_H - -#include <linux/spinlock.h> - -//#define SMTC_IPI_DEBUG - -#ifdef SMTC_IPI_DEBUG -#include <asm/mipsregs.h> -#include <asm/mipsmtregs.h> -#endif /* SMTC_IPI_DEBUG */ - -/* - * An IPI "message" - */ - -struct smtc_ipi { - struct smtc_ipi *flink; - int type; - void *arg; - int dest; -#ifdef SMTC_IPI_DEBUG - int sender; - long stamp; -#endif /* SMTC_IPI_DEBUG */ -}; - -/* - * Defined IPI Types - */ - -#define LINUX_SMP_IPI 1 -#define SMTC_CLOCK_TICK 2 -#define IRQ_AFFINITY_IPI 3 - -/* - * A queue of IPI messages - */ - -struct smtc_ipi_q { - struct smtc_ipi *head; - spinlock_t lock; - struct smtc_ipi *tail; - int depth; - int resched_flag; /* reschedule already queued */ -}; - -static inline void smtc_ipi_nq(struct smtc_ipi_q *q, struct smtc_ipi *p) -{ - unsigned long flags; - - spin_lock_irqsave(&q->lock, flags); - if (q->head == NULL) - q->head = q->tail = p; - else - q->tail->flink = p; - p->flink = NULL; - q->tail = p; - q->depth++; -#ifdef SMTC_IPI_DEBUG - p->sender = read_c0_tcbind(); - p->stamp = read_c0_count(); -#endif /* SMTC_IPI_DEBUG */ - spin_unlock_irqrestore(&q->lock, flags); -} - -static inline struct smtc_ipi *__smtc_ipi_dq(struct smtc_ipi_q *q) -{ - struct smtc_ipi *p; - - if (q->head == NULL) - p = NULL; - else { - p = q->head; - q->head = q->head->flink; - q->depth--; - /* Arguably unnecessary, but leaves queue cleaner */ - if (q->head == NULL) - q->tail = NULL; - } - - return p; -} - -static inline struct smtc_ipi *smtc_ipi_dq(struct smtc_ipi_q *q) -{ - unsigned long flags; - struct smtc_ipi *p; - - spin_lock_irqsave(&q->lock, flags); - p = __smtc_ipi_dq(q); - spin_unlock_irqrestore(&q->lock, flags); - - return p; -} - -static inline void smtc_ipi_req(struct smtc_ipi_q *q, struct smtc_ipi *p) -{ - unsigned long flags; - - spin_lock_irqsave(&q->lock, flags); - if (q->head == NULL) { - q->head = q->tail = p; - p->flink = NULL; - } else { - p->flink = q->head; - q->head = p; - } - q->depth++; - spin_unlock_irqrestore(&q->lock, flags); -} - -static inline int smtc_ipi_qdepth(struct smtc_ipi_q *q) -{ - unsigned long flags; - int retval; - - spin_lock_irqsave(&q->lock, flags); - retval = q->depth; - spin_unlock_irqrestore(&q->lock, flags); - return retval; -} - -extern void smtc_send_ipi(int cpu, int type, unsigned int action); - -#endif /* __ASM_SMTC_IPI_H */ diff --git a/arch/mips/include/asm/smtc_proc.h b/arch/mips/include/asm/smtc_proc.h deleted file mode 100644 index 25da651f1f5f..000000000000 --- a/arch/mips/include/asm/smtc_proc.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * Definitions for SMTC /proc entries - * Copyright(C) 2005 MIPS Technologies Inc. - */ -#ifndef __ASM_SMTC_PROC_H -#define __ASM_SMTC_PROC_H - -/* - * per-"CPU" statistics - */ - -struct smtc_cpu_proc { - unsigned long timerints; - unsigned long selfipis; -}; - -extern struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; - -/* Count of number of recoveries of "stolen" FPU access rights on 34K */ - -extern atomic_t smtc_fpu_recoveries; - -#endif /* __ASM_SMTC_PROC_H */ diff --git a/arch/mips/include/asm/stackframe.h b/arch/mips/include/asm/stackframe.h index d301e108d5b8..b188c797565c 100644 --- a/arch/mips/include/asm/stackframe.h +++ b/arch/mips/include/asm/stackframe.h @@ -19,22 +19,12 @@ #include <asm/asm-offsets.h> #include <asm/thread_info.h> -/* - * For SMTC kernel, global IE should be left set, and interrupts - * controlled exclusively via IXMT. - */ -#ifdef CONFIG_MIPS_MT_SMTC -#define STATMASK 0x1e -#elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) +#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) #define STATMASK 0x3f #else #define STATMASK 0x1f #endif -#ifdef CONFIG_MIPS_MT_SMTC -#include <asm/mipsmtregs.h> -#endif /* CONFIG_MIPS_MT_SMTC */ - .macro SAVE_AT .set push .set noat @@ -186,16 +176,6 @@ mfc0 v1, CP0_STATUS LONG_S $2, PT_R2(sp) LONG_S v1, PT_STATUS(sp) -#ifdef CONFIG_MIPS_MT_SMTC - /* - * Ideally, these instructions would be shuffled in - * to cover the pipeline delay. - */ - .set mips32 - mfc0 k0, CP0_TCSTATUS - .set mips0 - LONG_S k0, PT_TCSTATUS(sp) -#endif /* CONFIG_MIPS_MT_SMTC */ LONG_S $4, PT_R4(sp) mfc0 v1, CP0_CAUSE LONG_S $5, PT_R5(sp) @@ -321,36 +301,6 @@ .set push .set reorder .set noat -#ifdef CONFIG_MIPS_MT_SMTC - .set mips32r2 - /* - * We need to make sure the read-modify-write - * of Status below isn't perturbed by an interrupt - * or cross-TC access, so we need to do at least a DMT, - * protected by an interrupt-inhibit. But setting IXMT - * also creates a few-cycle window where an IPI could - * be queued and not be detected before potentially - * returning to a WAIT or user-mode loop. It must be - * replayed. - * - * We're in the middle of a context switch, and - * we can't dispatch it directly without trashing - * some registers, so we'll try to detect this unlikely - * case and program a software interrupt in the VPE, - * as would be done for a cross-VPE IPI. To accommodate - * the handling of that case, we're doing a DVPE instead - * of just a DMT here to protect against other threads. - * This is a lot of cruft to cover a tiny window. - * If you can find a better design, implement it! - * - */ - mfc0 v0, CP0_TCSTATUS - ori v0, TCSTATUS_IXMT - mtc0 v0, CP0_TCSTATUS - _ehb - DVPE 5 # dvpe a1 - jal mips_ihb -#endif /* CONFIG_MIPS_MT_SMTC */ mfc0 a0, CP0_STATUS ori a0, STATMASK xori a0, STATMASK @@ -362,59 +312,6 @@ and v0, v1 or v0, a0 mtc0 v0, CP0_STATUS -#ifdef CONFIG_MIPS_MT_SMTC -/* - * Only after EXL/ERL have been restored to status can we - * restore TCStatus.IXMT. - */ - LONG_L v1, PT_TCSTATUS(sp) - _ehb - mfc0 a0, CP0_TCSTATUS - andi v1, TCSTATUS_IXMT - bnez v1, 0f - -/* - * We'd like to detect any IPIs queued in the tiny window - * above and request an software interrupt to service them - * when we ERET. - * - * Computing the offset into the IPIQ array of the executing - * TC's IPI queue in-line would be tedious. We use part of - * the TCContext register to hold 16 bits of offset that we - * can add in-line to find the queue head. - */ - mfc0 v0, CP0_TCCONTEXT - la a2, IPIQ - srl v0, v0, 16 - addu a2, a2, v0 - LONG_L v0, 0(a2) - beqz v0, 0f -/* - * If we have a queue, provoke dispatch within the VPE by setting C_SW1 - */ - mfc0 v0, CP0_CAUSE - ori v0, v0, C_SW1 - mtc0 v0, CP0_CAUSE -0: - /* - * This test should really never branch but - * let's be prudent here. Having atomized - * the shared register modifications, we can - * now EVPE, and must do so before interrupts - * are potentially re-enabled. - */ - andi a1, a1, MVPCONTROL_EVP - beqz a1, 1f - evpe -1: - /* We know that TCStatua.IXMT should be set from above */ - xori a0, a0, TCSTATUS_IXMT - or a0, a0, v1 - mtc0 a0, CP0_TCSTATUS - _ehb - - .set mips0 -#endif /* CONFIG_MIPS_MT_SMTC */ LONG_L v1, PT_EPC(sp) MTC0 v1, CP0_EPC LONG_L $31, PT_R31(sp) @@ -467,33 +364,11 @@ * Set cp0 enable bit as sign that we're running on the kernel stack */ .macro CLI -#if !defined(CONFIG_MIPS_MT_SMTC) mfc0 t0, CP0_STATUS li t1, ST0_CU0 | STATMASK or t0, t1 xori t0, STATMASK mtc0 t0, CP0_STATUS -#else /* CONFIG_MIPS_MT_SMTC */ - /* - * For SMTC, we need to set privilege - * and disable interrupts only for the - * current TC, using the TCStatus register. - */ - mfc0 t0, CP0_TCSTATUS - /* Fortunately CU 0 is in the same place in both registers */ - /* Set TCU0, TMX, TKSU (for later inversion) and IXMT */ - li t1, ST0_CU0 | 0x08001c00 - or t0, t1 - /* Clear TKSU, leave IXMT */ - xori t0, 0x00001800 - mtc0 t0, CP0_TCSTATUS - _ehb - /* We need to leave the global IE bit set, but clear EXL...*/ - mfc0 t0, CP0_STATUS - ori t0, ST0_EXL | ST0_ERL - xori t0, ST0_EXL | ST0_ERL - mtc0 t0, CP0_STATUS -#endif /* CONFIG_MIPS_MT_SMTC */ irq_disable_hazard .endm @@ -502,35 +377,11 @@ * Set cp0 enable bit as sign that we're running on the kernel stack */ .macro STI -#if !defined(CONFIG_MIPS_MT_SMTC) mfc0 t0, CP0_STATUS li t1, ST0_CU0 | STATMASK or t0, t1 xori t0, STATMASK & ~1 mtc0 t0, CP0_STATUS -#else /* CONFIG_MIPS_MT_SMTC */ - /* - * For SMTC, we need to set privilege - * and enable interrupts only for the - * current TC, using the TCStatus register. - */ - _ehb - mfc0 t0, CP0_TCSTATUS - /* Fortunately CU 0 is in the same place in both registers */ - /* Set TCU0, TKSU (for later inversion) and IXMT */ - li t1, ST0_CU0 | 0x08001c00 - or t0, t1 - /* Clear TKSU *and* IXMT */ - xori t0, 0x00001c00 - mtc0 t0, CP0_TCSTATUS - _ehb - /* We need to leave the global IE bit set, but clear EXL...*/ - mfc0 t0, CP0_STATUS - ori t0, ST0_EXL - xori t0, ST0_EXL - mtc0 t0, CP0_STATUS - /* irq_enable_hazard below should expand to EHB for 24K/34K cpus */ -#endif /* CONFIG_MIPS_MT_SMTC */ irq_enable_hazard .endm @@ -540,32 +391,6 @@ * Set cp0 enable bit as sign that we're running on the kernel stack */ .macro KMODE -#ifdef CONFIG_MIPS_MT_SMTC - /* - * This gets baroque in SMTC. We want to - * protect the non-atomic clearing of EXL - * with DMT/EMT, but we don't want to take - * an interrupt while DMT is still in effect. - */ - - /* KMODE gets invoked from both reorder and noreorder code */ - .set push - .set mips32r2 - .set noreorder - mfc0 v0, CP0_TCSTATUS - andi v1, v0, TCSTATUS_IXMT - ori v0, TCSTATUS_IXMT - mtc0 v0, CP0_TCSTATUS - _ehb - DMT 2 # dmt v0 - /* - * We don't know a priori if ra is "live" - */ - move t0, ra - jal mips_ihb - nop /* delay slot */ - move ra, t0 -#endif /* CONFIG_MIPS_MT_SMTC */ mfc0 t0, CP0_STATUS li t1, ST0_CU0 | (STATMASK & ~1) #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) @@ -576,25 +401,6 @@ or t0, t1 xori t0, STATMASK & ~1 mtc0 t0, CP0_STATUS -#ifdef CONFIG_MIPS_MT_SMTC - _ehb - andi v0, v0, VPECONTROL_TE - beqz v0, 2f - nop /* delay slot */ - emt -2: - mfc0 v0, CP0_TCSTATUS - /* Clear IXMT, then OR in previous value */ - ori v0, TCSTATUS_IXMT - xori v0, TCSTATUS_IXMT - or v0, v1, v0 - mtc0 v0, CP0_TCSTATUS - /* - * irq_disable_hazard below should expand to EHB - * on 24K/34K CPUS - */ - .set pop -#endif /* CONFIG_MIPS_MT_SMTC */ irq_disable_hazard .endm diff --git a/arch/mips/include/asm/thread_info.h b/arch/mips/include/asm/thread_info.h index d2d961d6cb86..7de865805deb 100644 --- a/arch/mips/include/asm/thread_info.h +++ b/arch/mips/include/asm/thread_info.h @@ -159,11 +159,7 @@ static inline struct thread_info *current_thread_info(void) * We stash processor id into a COP0 register to retrieve it fast * at kernel exception entry. */ -#if defined(CONFIG_MIPS_MT_SMTC) -#define SMP_CPUID_REG 2, 2 /* TCBIND */ -#define ASM_SMP_CPUID_REG $2, 2 -#define SMP_CPUID_PTRSHIFT 19 -#elif defined(CONFIG_MIPS_PGD_C0_CONTEXT) +#if defined(CONFIG_MIPS_PGD_C0_CONTEXT) #define SMP_CPUID_REG 20, 0 /* XCONTEXT */ #define ASM_SMP_CPUID_REG $20 #define SMP_CPUID_PTRSHIFT 48 @@ -179,13 +175,8 @@ static inline struct thread_info *current_thread_info(void) #define SMP_CPUID_REGSHIFT (SMP_CPUID_PTRSHIFT + 2) #endif -#ifdef CONFIG_MIPS_MT_SMTC -#define ASM_CPUID_MFC0 mfc0 -#define UASM_i_CPUID_MFC0 uasm_i_mfc0 -#else #define ASM_CPUID_MFC0 MFC0 #define UASM_i_CPUID_MFC0 UASM_i_MFC0 -#endif #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */ diff --git a/arch/mips/include/asm/time.h b/arch/mips/include/asm/time.h index 24f534a7fbc3..8f3047d611ee 100644 --- a/arch/mips/include/asm/time.h +++ b/arch/mips/include/asm/time.h @@ -52,14 +52,11 @@ extern int (*perf_irq)(void); */ extern unsigned int __weak get_c0_compare_int(void); extern int r4k_clockevent_init(void); -extern int smtc_clockevent_init(void); extern int gic_clockevent_init(void); static inline int mips_clockevent_init(void) { -#ifdef CONFIG_MIPS_MT_SMTC - return smtc_clockevent_init(); -#elif defined(CONFIG_CEVT_GIC) +#if defined(CONFIG_CEVT_GIC) return (gic_clockevent_init() | r4k_clockevent_init()); #elif defined(CONFIG_CEVT_R4K) return r4k_clockevent_init(); diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 277dab301cea..8f8b531bc848 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -17,7 +17,6 @@ endif obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm1480.o obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o -obj-$(CONFIG_MIPS_MT_SMTC) += cevt-smtc.o obj-$(CONFIG_CEVT_DS1287) += cevt-ds1287.o obj-$(CONFIG_CEVT_GIC) += cevt-gic.o obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o @@ -50,7 +49,6 @@ obj-$(CONFIG_CPU_BMIPS) += smp-bmips.o bmips_vec.o obj-$(CONFIG_MIPS_MT) += mips-mt.o obj-$(CONFIG_MIPS_MT_FPAFF) += mips-mt-fpaff.o -obj-$(CONFIG_MIPS_MT_SMTC) += smtc.o smtc-asm.o smtc-proc.o obj-$(CONFIG_MIPS_MT_SMP) += smp-mt.o obj-$(CONFIG_MIPS_CMP) += smp-cmp.o obj-$(CONFIG_MIPS_CPS) += smp-cps.o cps-vec.o diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index 0ea75c244b48..08f897ee9a77 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -64,9 +64,6 @@ void output_ptreg_defines(void) OFFSET(PT_BVADDR, pt_regs, cp0_badvaddr); OFFSET(PT_STATUS, pt_regs, cp0_status); OFFSET(PT_CAUSE, pt_regs, cp0_cause); -#ifdef CONFIG_MIPS_MT_SMTC - OFFSET(PT_TCSTATUS, pt_regs, cp0_tcstatus); -#endif /* CONFIG_MIPS_MT_SMTC */ #ifdef CONFIG_CPU_CAVIUM_OCTEON OFFSET(PT_MPL, pt_regs, mpl); OFFSET(PT_MTP, pt_regs, mtp); diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c index 50d3f5a8d6bb..bff124ae69fa 100644 --- a/arch/mips/kernel/cevt-r4k.c +++ b/arch/mips/kernel/cevt-r4k.c @@ -12,17 +12,10 @@ #include <linux/smp.h> #include <linux/irq.h> -#include <asm/smtc_ipi.h> #include <asm/time.h> #include <asm/cevt-r4k.h> #include <asm/gic.h> -/* - * The SMTC Kernel for the 34K, 1004K, et. al. replaces several - * of these routines with SMTC-specific variants. - */ - -#ifndef CONFIG_MIPS_MT_SMTC static int mips_next_event(unsigned long delta, struct clock_event_device *evt) { @@ -36,8 +29,6 @@ static int mips_next_event(unsigned long delta, return res; } -#endif /* CONFIG_MIPS_MT_SMTC */ - void mips_set_clock_mode(enum clock_event_mode mode, struct clock_event_device *evt) { @@ -47,7 +38,6 @@ void mips_set_clock_mode(enum clock_event_mode mode, DEFINE_PER_CPU(struct clock_event_device, mips_clockevent_device); int cp0_timer_irq_installed; -#ifndef CONFIG_MIPS_MT_SMTC irqreturn_t c0_compare_interrupt(int irq, void *dev_id) { const int r2 = cpu_has_mips_r2; @@ -82,8 +72,6 @@ out: return IRQ_HANDLED; } -#endif /* Not CONFIG_MIPS_MT_SMTC */ - struct irqaction c0_compare_irqaction = { .handler = c0_compare_interrupt, .flags = IRQF_PERCPU | IRQF_TIMER, @@ -170,7 +158,6 @@ int c0_compare_int_usable(void) return 1; } -#ifndef CONFIG_MIPS_MT_SMTC int r4k_clockevent_init(void) { unsigned int cpu = smp_processor_id(); @@ -225,4 +212,3 @@ int r4k_clockevent_init(void) return 0; } -#endif /* Not CONFIG_MIPS_MT_SMTC */ diff --git a/arch/mips/kernel/cevt-smtc.c b/arch/mips/kernel/cevt-smtc.c deleted file mode 100644 index b6cf0a60d896..000000000000 --- a/arch/mips/kernel/cevt-smtc.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2007 MIPS Technologies, Inc. - * Copyright (C) 2007 Ralf Baechle <ralf@linux-mips.org> - * Copyright (C) 2008 Kevin D. Kissell, Paralogos sarl - */ -#include <linux/clockchips.h> -#include <linux/interrupt.h> -#include <linux/percpu.h> -#include <linux/smp.h> -#include <linux/irq.h> - -#include <asm/smtc_ipi.h> -#include <asm/time.h> -#include <asm/cevt-r4k.h> - -/* - * Variant clock event timer support for SMTC on MIPS 34K, 1004K - * or other MIPS MT cores. - * - * Notes on SMTC Support: - * - * SMTC has multiple microthread TCs pretending to be Linux CPUs. - * But there's only one Count/Compare pair per VPE, and Compare - * interrupts are taken opportunisitically by available TCs - * bound to the VPE with the Count register. The new timer - * framework provides for global broadcasts, but we really - * want VPE-level multicasts for best behavior. So instead - * of invoking the high-level clock-event broadcast code, - * this version of SMTC support uses the historical SMTC - * multicast mechanisms "under the hood", appearing to the - * generic clock layer as if the interrupts are per-CPU. - * - * The approach taken here is to maintain a set of NR_CPUS - * virtual timers, and track which "CPU" needs to be alerted - * at each event. - * - * It's unlikely that we'll see a MIPS MT core with more than - * 2 VPEs, but we *know* that we won't need to handle more - * VPEs than we have "CPUs". So NCPUs arrays of NCPUs elements - * is always going to be overkill, but always going to be enough. - */ - -unsigned long smtc_nexttime[NR_CPUS][NR_CPUS]; -static int smtc_nextinvpe[NR_CPUS]; - -/* - * Timestamps stored are absolute values to be programmed - * into Count register. Valid timestamps will never be zero. - * If a Zero Count value is actually calculated, it is converted - * to be a 1, which will introduce 1 or two CPU cycles of error - * roughly once every four billion events, which at 1000 HZ means - * about once every 50 days. If that's actually a problem, one - * could alternate squashing 0 to 1 and to -1. - */ - -#define MAKEVALID(x) (((x) == 0L) ? 1L : (x)) -#define ISVALID(x) ((x) != 0L) - -/* - * Time comparison is subtle, as it's really truncated - * modular arithmetic. - */ - -#define IS_SOONER(a, b, reference) \ - (((a) - (unsigned long)(reference)) < ((b) - (unsigned long)(reference))) - -/* - * CATCHUP_INCREMENT, used when the function falls behind the counter. - * Could be an increasing function instead of a constant; - */ - -#define CATCHUP_INCREMENT 64 - -static int mips_next_event(unsigned long delta, - struct clock_event_device *evt) -{ - unsigned long flags; - unsigned int mtflags; - unsigned long timestamp, reference, previous; - unsigned long nextcomp = 0L; - int vpe = current_cpu_data.vpe_id; - int cpu = smp_processor_id(); - local_irq_save(flags); - mtflags = dmt(); - - /* - * Maintain the per-TC virtual timer - * and program the per-VPE shared Count register - * as appropriate here... - */ - reference = (unsigned long)read_c0_count(); - timestamp = MAKEVALID(reference + delta); - /* - * To really model the clock, we have to catch the case - * where the current next-in-VPE timestamp is the old - * timestamp for the calling CPE, but the new value is - * in fact later. In that case, we have to do a full - * scan and discover the new next-in-VPE CPU id and - * timestamp. - */ - previous = smtc_nexttime[vpe][cpu]; - if (cpu == smtc_nextinvpe[vpe] && ISVALID(previous) - && IS_SOONER(previous, timestamp, reference)) { - int i; - int soonest = cpu; - - /* - * Update timestamp array here, so that new - * value gets considered along with those of - * other virtual CPUs on the VPE. - */ - smtc_nexttime[vpe][cpu] = timestamp; - for_each_online_cpu(i) { - if (ISVALID(smtc_nexttime[vpe][i]) - && IS_SOONER(smtc_nexttime[vpe][i], - smtc_nexttime[vpe][soonest], reference)) { - soonest = i; - } - } - smtc_nextinvpe[vpe] = soonest; - nextcomp = smtc_nexttime[vpe][soonest]; - /* - * Otherwise, we don't have to process the whole array rank, - * we just have to see if the event horizon has gotten closer. - */ - } else { - if (!ISVALID(smtc_nexttime[vpe][smtc_nextinvpe[vpe]]) || - IS_SOONER(timestamp, - smtc_nexttime[vpe][smtc_nextinvpe[vpe]], reference)) { - smtc_nextinvpe[vpe] = cpu; - nextcomp = timestamp; - } - /* - * Since next-in-VPE may me the same as the executing - * virtual CPU, we update the array *after* checking - * its value. - */ - smtc_nexttime[vpe][cpu] = timestamp; - } - - /* - * It may be that, in fact, we don't need to update Compare, - * but if we do, we want to make sure we didn't fall into - * a crack just behind Count. - */ - if (ISVALID(nextcomp)) { - write_c0_compare(nextcomp); - ehb(); - /* - * We never return an error, we just make sure - * that we trigger the handlers as quickly as - * we can if we fell behind. - */ - while ((nextcomp - (unsigned long)read_c0_count()) - > (unsigned long)LONG_MAX) { - nextcomp += CATCHUP_INCREMENT; - write_c0_compare(nextcomp); - ehb(); - } - } - emt(mtflags); - local_irq_restore(flags); - return 0; -} - - -void smtc_distribute_timer(int vpe) -{ - unsigned long flags; - unsigned int mtflags; - int cpu; - struct clock_event_device *cd; - unsigned long nextstamp; - unsigned long reference; - - -repeat: - nextstamp = 0L; - for_each_online_cpu(cpu) { - /* - * Find virtual CPUs within the current VPE who have - * unserviced timer requests whose time is now past. - */ - local_irq_save(flags); - mtflags = dmt(); - if (cpu_data[cpu].vpe_id == vpe && - ISVALID(smtc_nexttime[vpe][cpu])) { - reference = (unsigned long)read_c0_count(); - if ((smtc_nexttime[vpe][cpu] - reference) - > (unsigned long)LONG_MAX) { - smtc_nexttime[vpe][cpu] = 0L; - emt(mtflags); - local_irq_restore(flags); - /* - * We don't send IPIs to ourself. - */ - if (cpu != smp_processor_id()) { - smtc_send_ipi(cpu, SMTC_CLOCK_TICK, 0); - } else { - cd = &per_cpu(mips_clockevent_device, cpu); - cd->event_handler(cd); - } - } else { - /* Local to VPE but Valid Time not yet reached. */ - if (!ISVALID(nextstamp) || - IS_SOONER(smtc_nexttime[vpe][cpu], nextstamp, - reference)) { - smtc_nextinvpe[vpe] = cpu; - nextstamp = smtc_nexttime[vpe][cpu]; - } - emt(mtflags); - local_irq_restore(flags); - } - } else { - emt(mtflags); - local_irq_restore(flags); - - } - } - /* Reprogram for interrupt at next soonest timestamp for VPE */ - if (ISVALID(nextstamp)) { - write_c0_compare(nextstamp); - ehb(); - if ((nextstamp - (unsigned long)read_c0_count()) - > (unsigned long)LONG_MAX) - goto repeat; - } -} - - -irqreturn_t c0_compare_interrupt(int irq, void *dev_id) -{ - int cpu = smp_processor_id(); - - /* If we're running SMTC, we've got MIPS MT and therefore MIPS32R2 */ - handle_perf_irq(1); - - if (read_c0_cause() & (1 << 30)) { - /* Clear Count/Compare Interrupt */ - write_c0_compare(read_c0_compare()); - smtc_distribute_timer(cpu_data[cpu].vpe_id); - } - return IRQ_HANDLED; -} - - -int smtc_clockevent_init(void) -{ - uint64_t mips_freq = mips_hpt_frequency; - unsigned int cpu = smp_processor_id(); - struct clock_event_device *cd; - unsigned int irq; - int i; - int j; - - if (!cpu_has_counter || !mips_hpt_frequency) - return -ENXIO; - if (cpu == 0) { - for (i = 0; i < num_possible_cpus(); i++) { - smtc_nextinvpe[i] = 0; - for (j = 0; j < num_possible_cpus(); j++) - smtc_nexttime[i][j] = 0L; - } - /* - * SMTC also can't have the usablility test - * run by secondary TCs once Compare is in use. - */ - if (!c0_compare_int_usable()) - return -ENXIO; - } - - /* - * With vectored interrupts things are getting platform specific. - * get_c0_compare_int is a hook to allow a platform to return the - * interrupt number of it's liking. - */ - irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq; - if (get_c0_compare_int) - irq = get_c0_compare_int(); - - cd = &per_cpu(mips_clockevent_device, cpu); - - cd->name = "MIPS"; - cd->features = CLOCK_EVT_FEAT_ONESHOT; - - /* Calculate the min / max delta */ - cd->mult = div_sc((unsigned long) mips_freq, NSEC_PER_SEC, 32); - cd->shift = 32; - cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); - cd->min_delta_ns = clockevent_delta2ns(0x300, cd); - - cd->rating = 300; - cd->irq = irq; - cd->cpumask = cpumask_of(cpu); - cd->set_next_event = mips_next_event; - cd->set_mode = mips_set_clock_mode; - cd->event_handler = mips_event_handler; - - clockevents_register_device(cd); - - /* - * On SMTC we only want to do the data structure - * initialization and IRQ setup once. - */ - if (cpu) - return 0; - /* - * And we need the hwmask associated with the c0_compare - * vector to be initialized. - */ - irq_hwmask[irq] = (0x100 << cp0_compare_irq); - if (cp0_timer_irq_installed) - return 0; - - cp0_timer_irq_installed = 1; - - setup_irq(irq, &c0_compare_irqaction); - - return 0; -} diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index f83dc70d2bc2..e8638c5b7d11 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -62,7 +62,7 @@ static inline void check_errata(void) case CPU_34K: /* * Erratum "RPS May Cause Incorrect Instruction Execution" - * This code only handles VPE0, any SMP/SMTC/RTOS code + * This code only handles VPE0, any SMP/RTOS code * making use of VPE1 will be responsable for that VPE. */ if ((c->processor_id & PRID_REV_MASK) <= PRID_REV_34K_V1_0_2) diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S index e5786858cdb6..4353d323f017 100644 --- a/arch/mips/kernel/entry.S +++ b/arch/mips/kernel/entry.S @@ -16,9 +16,6 @@ #include <asm/isadep.h> #include <asm/thread_info.h> #include <asm/war.h> -#ifdef CONFIG_MIPS_MT_SMTC -#include <asm/mipsmtregs.h> -#endif #ifndef CONFIG_PREEMPT #define resume_kernel restore_all @@ -89,41 +86,6 @@ FEXPORT(syscall_exit) bnez t0, syscall_exit_work restore_all: # restore full frame -#ifdef CONFIG_MIPS_MT_SMTC -#ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP -/* Re-arm any temporarily masked interrupts not explicitly "acked" */ - mfc0 v0, CP0_TCSTATUS - ori v1, v0, TCSTATUS_IXMT - mtc0 v1, CP0_TCSTATUS - andi v0, TCSTATUS_IXMT - _ehb - mfc0 t0, CP0_TCCONTEXT - DMT 9 # dmt t1 - jal mips_ihb - mfc0 t2, CP0_STATUS - andi t3, t0, 0xff00 - or t2, t2, t3 - mtc0 t2, CP0_STATUS - _ehb - andi t1, t1, VPECONTROL_TE - beqz t1, 1f - EMT -1: - mfc0 v1, CP0_TCSTATUS - /* We set IXMT above, XOR should clear it here */ - xori v1, v1, TCSTATUS_IXMT - or v1, v0, v1 - mtc0 v1, CP0_TCSTATUS - _ehb - xor t0, t0, t3 - mtc0 t0, CP0_TCCONTEXT -#endif /* CONFIG_MIPS_MT_SMTC_IM_BACKSTOP */ -/* Detect and execute deferred IPI "interrupts" */ - LONG_L s0, TI_REGS($28) - LONG_S sp, TI_REGS($28) - jal deferred_smtc_ipi - LONG_S s0, TI_REGS($28) -#endif /* CONFIG_MIPS_MT_SMTC */ .set noat RESTORE_TEMP RESTORE_AT diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S index a9ce3408be25..ac35e12cb1f3 100644 --- a/arch/mips/kernel/genex.S +++ b/arch/mips/kernel/genex.S @@ -21,20 +21,6 @@ #include <asm/war.h> #include <asm/thread_info.h> -#ifdef CONFIG_MIPS_MT_SMTC -#define PANIC_PIC(msg) \ - .set push; \ - .set nomicromips; \ - .set reorder; \ - PTR_LA a0,8f; \ - .set noat; \ - PTR_LA AT, panic; \ - jr AT; \ -9: b 9b; \ - .set pop; \ - TEXT(msg) -#endif - __INIT /* @@ -251,15 +237,6 @@ NESTED(except_vec_vi, 0, sp) SAVE_AT .set push .set noreorder -#ifdef CONFIG_MIPS_MT_SMTC - /* - * To keep from blindly blocking *all* interrupts - * during service by SMTC kernel, we also want to - * pass the IM value to be cleared. - */ -FEXPORT(except_vec_vi_mori) - ori a0, $0, 0 -#endif /* CONFIG_MIPS_MT_SMTC */ PTR_LA v1, except_vec_vi_handler FEXPORT(except_vec_vi_lui) lui v0, 0 /* Patched */ @@ -277,37 +254,10 @@ EXPORT(except_vec_vi_end) NESTED(except_vec_vi_handler, 0, sp) SAVE_TEMP SAVE_STATIC -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC has an interesting problem that interrupts are level-triggered, - * and the CLI macro will clear EXL, potentially causing a duplicate - * interrupt service invocation. So we need to clear the associated - * IM bit of Status prior to doing CLI, and restore it after the - * service routine has been invoked - we must assume that the - * service routine will have cleared the state, and any active - * level represents a new or otherwised unserviced event... - */ - mfc0 t1, CP0_STATUS - and t0, a0, t1 -#ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP - mfc0 t2, CP0_TCCONTEXT - or t2, t0, t2 - mtc0 t2, CP0_TCCONTEXT -#endif /* CONFIG_MIPS_MT_SMTC_IM_BACKSTOP */ - xor t1, t1, t0 - mtc0 t1, CP0_STATUS - _ehb -#endif /* CONFIG_MIPS_MT_SMTC */ CLI #ifdef CONFIG_TRACE_IRQFLAGS move s0, v0 -#ifdef CONFIG_MIPS_MT_SMTC - move s1, a0 -#endif TRACE_IRQS_OFF -#ifdef CONFIG_MIPS_MT_SMTC - move a0, s1 -#endif move v0, s0 #endif @@ -496,9 +446,6 @@ NESTED(nmi_handler, PT_SIZE, sp) .align 5 LEAF(handle_ri_rdhwr_vivt) -#ifdef CONFIG_MIPS_MT_SMTC - PANIC_PIC("handle_ri_rdhwr_vivt called") -#else .set push .set noat .set noreorder @@ -517,7 +464,6 @@ NESTED(nmi_handler, PT_SIZE, sp) .set pop bltz k1, handle_ri /* slow path */ /* fall thru */ -#endif END(handle_ri_rdhwr_vivt) LEAF(handle_ri_rdhwr) diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S index e712dcf18b2d..95afd663cd45 100644 --- a/arch/mips/kernel/head.S +++ b/arch/mips/kernel/head.S @@ -35,33 +35,12 @@ */ .macro setup_c0_status set clr .set push -#ifdef CONFIG_MIPS_MT_SMTC - /* - * For SMTC, we need to set privilege and disable interrupts only for - * the current TC, using the TCStatus register. - */ - mfc0 t0, CP0_TCSTATUS - /* Fortunately CU 0 is in the same place in both registers */ - /* Set TCU0, TMX, TKSU (for later inversion) and IXMT */ - li t1, ST0_CU0 | 0x08001c00 - or t0, t1 - /* Clear TKSU, leave IXMT */ - xori t0, 0x00001800 - mtc0 t0, CP0_TCSTATUS - _ehb - /* We need to leave the global IE bit set, but clear EXL...*/ - mfc0 t0, CP0_STATUS - or t0, ST0_CU0 | ST0_EXL | ST0_ERL | \set | \clr - xor t0, ST0_EXL | ST0_ERL | \clr - mtc0 t0, CP0_STATUS -#else mfc0 t0, CP0_STATUS or t0, ST0_CU0|\set|0x1f|\clr xor t0, 0x1f|\clr mtc0 t0, CP0_STATUS .set noreorder sll zero,3 # ehb -#endif .set pop .endm @@ -115,24 +94,6 @@ NESTED(kernel_entry, 16, sp) # kernel entry point jr t0 0: -#ifdef CONFIG_MIPS_MT_SMTC - /* - * In SMTC kernel, "CLI" is thread-specific, in TCStatus. - * We still need to enable interrupts globally in Status, - * and clear EXL/ERL. - * - * TCContext is used to track interrupt levels under - * service in SMTC kernel. Clear for boot TC before - * allowing any interrupts. - */ - mtc0 zero, CP0_TCCONTEXT - - mfc0 t0, CP0_STATUS - ori t0, t0, 0xff1f - xori t0, t0, 0x001e - mtc0 t0, CP0_STATUS -#endif /* CONFIG_MIPS_MT_SMTC */ - PTR_LA t0, __bss_start # clear .bss LONG_S zero, (t0) PTR_LA t1, __bss_stop - LONGSIZE @@ -164,25 +125,8 @@ NESTED(kernel_entry, 16, sp) # kernel entry point * function after setting up the stack and gp registers. */ NESTED(smp_bootstrap, 16, sp) -#ifdef CONFIG_MIPS_MT_SMTC - /* - * Read-modify-writes of Status must be atomic, and this - * is one case where CLI is invoked without EXL being - * necessarily set. The CLI and setup_c0_status will - * in fact be redundant for all but the first TC of - * each VPE being booted. - */ - DMT 10 # dmt t2 /* t0, t1 are used by CLI and setup_c0_status() */ - jal mips_ihb -#endif /* CONFIG_MIPS_MT_SMTC */ smp_slave_setup setup_c0_status_sec -#ifdef CONFIG_MIPS_MT_SMTC - andi t2, t2, VPECONTROL_TE - beqz t2, 2f - EMT # emt -2: -#endif /* CONFIG_MIPS_MT_SMTC */ j start_secondary END(smp_bootstrap) #endif /* CONFIG_SMP */ diff --git a/arch/mips/kernel/i8259.c b/arch/mips/kernel/i8259.c index 2b91fe80c436..50b364897dda 100644 --- a/arch/mips/kernel/i8259.c +++ b/arch/mips/kernel/i8259.c @@ -42,9 +42,6 @@ static struct irq_chip i8259A_chip = { .irq_disable = disable_8259A_irq, .irq_unmask = enable_8259A_irq, .irq_mask_ack = mask_and_ack_8259A, -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF - .irq_set_affinity = plat_set_irq_affinity, -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ }; /* @@ -180,7 +177,6 @@ handle_real_irq: outb(cached_master_mask, PIC_MASTER_IMR); outb(0x60+irq, PIC_MASTER_CMD); /* 'Specific EOI to master */ } - smtc_im_ack_irq(irq); raw_spin_unlock_irqrestore(&i8259A_lock, flags); return; diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c index 5e3b653f5d9e..c4ceccfa3828 100644 --- a/arch/mips/kernel/idle.c +++ b/arch/mips/kernel/idle.c @@ -229,18 +229,8 @@ void __init check_wait(void) } } -static void smtc_idle_hook(void) -{ -#ifdef CONFIG_MIPS_MT_SMTC - void smtc_idle_loop_hook(void); - - smtc_idle_loop_hook(); -#endif -} - void arch_cpu_idle(void) { - smtc_idle_hook(); if (cpu_wait) cpu_wait(); else diff --git a/arch/mips/kernel/irq-msc01.c b/arch/mips/kernel/irq-msc01.c index fab40f7d2e03..4858642d543d 100644 --- a/arch/mips/kernel/irq-msc01.c +++ b/arch/mips/kernel/irq-msc01.c @@ -53,13 +53,9 @@ static inline void unmask_msc_irq(struct irq_data *d) */ static void level_mask_and_ack_msc_irq(struct irq_data *d) { - unsigned int irq = d->irq; - mask_msc_irq(d); if (!cpu_has_veic) MSCIC_WRITE(MSC01_IC_EOI, 0); - /* This actually needs to be a call into platform code */ - smtc_im_ack_irq(irq); } /* @@ -78,7 +74,6 @@ static void edge_mask_and_ack_msc_irq(struct irq_data *d) MSCIC_WRITE(MSC01_IC_SUP+irq*8, r | ~MSC01_IC_SUP_EDGE_BIT); MSCIC_WRITE(MSC01_IC_SUP+irq*8, r); } - smtc_im_ack_irq(irq); } /* diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c index d1fea7a054be..5024fa39b861 100644 --- a/arch/mips/kernel/irq.c +++ b/arch/mips/kernel/irq.c @@ -73,7 +73,6 @@ void free_irqno(unsigned int irq) */ void ack_bad_irq(unsigned int irq) { - smtc_im_ack_irq(irq); printk("unexpected IRQ # %d\n", irq); } @@ -142,23 +141,7 @@ void __irq_entry do_IRQ(unsigned int irq) { irq_enter(); check_stack_overflow(); - if (!smtc_handle_on_other_cpu(irq)) - generic_handle_irq(irq); - irq_exit(); -} - -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF -/* - * To avoid inefficient and in some cases pathological re-checking of - * IRQ affinity, we have this variant that skips the affinity check. - */ - -void __irq_entry do_IRQ_no_affinity(unsigned int irq) -{ - irq_enter(); - smtc_im_backstop(irq); generic_handle_irq(irq); irq_exit(); } -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ diff --git a/arch/mips/kernel/mips-mt-fpaff.c b/arch/mips/kernel/mips-mt-fpaff.c index cb098628aee8..362bb3707e62 100644 --- a/arch/mips/kernel/mips-mt-fpaff.c +++ b/arch/mips/kernel/mips-mt-fpaff.c @@ -1,5 +1,5 @@ /* - * General MIPS MT support routines, usable in AP/SP, SMVP, or SMTC kernels + * General MIPS MT support routines, usable in AP/SP and SMVP. * Copyright (C) 2005 Mips Technologies, Inc */ #include <linux/cpu.h> diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c index 6ded9bd1489c..88b1ef5f868a 100644 --- a/arch/mips/kernel/mips-mt.c +++ b/arch/mips/kernel/mips-mt.c @@ -1,5 +1,5 @@ /* - * General MIPS MT support routines, usable in AP/SP, SMVP, or SMTC kernels + * General MIPS MT support routines, usable in AP/SP and SMVP. * Copyright (C) 2005 Mips Technologies, Inc */ @@ -57,9 +57,6 @@ void mips_mt_regdump(unsigned long mvpctl) int tc; unsigned long haltval; unsigned long tcstatval; -#ifdef CONFIG_MIPS_MT_SMTC - void smtc_soft_dump(void); -#endif /* CONFIG_MIPT_MT_SMTC */ local_irq_save(flags); vpflags = dvpe(); @@ -116,9 +113,6 @@ void mips_mt_regdump(unsigned long mvpctl) if (!haltval) write_tc_c0_tchalt(0); } -#ifdef CONFIG_MIPS_MT_SMTC - smtc_soft_dump(); -#endif /* CONFIG_MIPT_MT_SMTC */ printk("===========================\n"); evpe(vpflags); local_irq_restore(flags); @@ -295,21 +289,11 @@ void mips_mt_set_cpuoptions(void) void mt_cflush_lockdown(void) { -#ifdef CONFIG_MIPS_MT_SMTC - void smtc_cflush_lockdown(void); - - smtc_cflush_lockdown(); -#endif /* CONFIG_MIPS_MT_SMTC */ /* FILL IN VSMP and AP/SP VERSIONS HERE */ } void mt_cflush_release(void) { -#ifdef CONFIG_MIPS_MT_SMTC - void smtc_cflush_release(void); - - smtc_cflush_release(); -#endif /* CONFIG_MIPS_MT_SMTC */ /* FILL IN VSMP and AP/SP VERSIONS HERE */ } diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index 60e39dc7f1eb..0a1ec0f3beff 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -140,13 +140,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, */ childregs->cp0_status &= ~(ST0_CU2|ST0_CU1); -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC restores TCStatus after Status, and the CU bits - * are aliased there. - */ - childregs->cp0_tcstatus &= ~(ST0_CU2|ST0_CU1); -#endif clear_tsk_thread_flag(p, TIF_USEDFPU); #ifdef CONFIG_MIPS_MT_FPAFF diff --git a/arch/mips/kernel/r4k_switch.S b/arch/mips/kernel/r4k_switch.S index abacac7c33ef..547c522964de 100644 --- a/arch/mips/kernel/r4k_switch.S +++ b/arch/mips/kernel/r4k_switch.S @@ -87,18 +87,6 @@ PTR_ADDU t0, $28, _THREAD_SIZE - 32 set_saved_sp t0, t1, t2 -#ifdef CONFIG_MIPS_MT_SMTC - /* Read-modify-writes of Status must be atomic on a VPE */ - mfc0 t2, CP0_TCSTATUS - ori t1, t2, TCSTATUS_IXMT - mtc0 t1, CP0_TCSTATUS - andi t2, t2, TCSTATUS_IXMT - _ehb - DMT 8 # dmt t0 - move t1,ra - jal mips_ihb - move ra,t1 -#endif /* CONFIG_MIPS_MT_SMTC */ mfc0 t1, CP0_STATUS /* Do we really need this? */ li a3, 0xff01 and t1, a3 @@ -107,18 +95,6 @@ and a2, a3 or a2, t1 mtc0 a2, CP0_STATUS -#ifdef CONFIG_MIPS_MT_SMTC - _ehb - andi t0, t0, VPECONTROL_TE - beqz t0, 1f - emt -1: - mfc0 t1, CP0_TCSTATUS - xori t1, t1, TCSTATUS_IXMT - or t1, t1, t2 - mtc0 t1, CP0_TCSTATUS - _ehb -#endif /* CONFIG_MIPS_MT_SMTC */ move v0, a0 jr ra END(resume) @@ -176,19 +152,10 @@ LEAF(_restore_msa) #define FPU_DEFAULT 0x00000000 LEAF(_init_fpu) -#ifdef CONFIG_MIPS_MT_SMTC - /* Rather than manipulate per-VPE Status, set per-TC bit in TCStatus */ - mfc0 t0, CP0_TCSTATUS - /* Bit position is the same for Status, TCStatus */ - li t1, ST0_CU1 - or t0, t1 - mtc0 t0, CP0_TCSTATUS -#else /* Normal MIPS CU1 enable */ mfc0 t0, CP0_STATUS li t1, ST0_CU1 or t0, t1 mtc0 t0, CP0_STATUS -#endif /* CONFIG_MIPS_MT_SMTC */ enable_fpu_hazard li t1, FPU_DEFAULT diff --git a/arch/mips/kernel/rtlx-mt.c b/arch/mips/kernel/rtlx-mt.c index 9c1aca00fd54..5a66b975989e 100644 --- a/arch/mips/kernel/rtlx-mt.c +++ b/arch/mips/kernel/rtlx-mt.c @@ -36,7 +36,6 @@ static irqreturn_t rtlx_interrupt(int irq, void *dev_id) unsigned long flags; int i; - /* Ought not to be strictly necessary for SMTC builds */ local_irq_save(flags); vpeflags = dvpe(); set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ); diff --git a/arch/mips/kernel/smp-cmp.c b/arch/mips/kernel/smp-cmp.c index 3ef55fb7ac03..64d06f6a9adf 100644 --- a/arch/mips/kernel/smp-cmp.c +++ b/arch/mips/kernel/smp-cmp.c @@ -49,14 +49,11 @@ static void cmp_init_secondary(void) /* Enable per-cpu interrupts: platform specific */ -#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_MIPS_MT_SMP if (cpu_has_mipsmt) c->vpe_id = (read_c0_tcbind() >> TCBIND_CURVPE_SHIFT) & TCBIND_CURVPE; #endif -#ifdef CONFIG_MIPS_MT_SMTC - c->tc_id = (read_c0_tcbind() & TCBIND_CURTC) >> TCBIND_CURTC_SHIFT; -#endif } static void cmp_smp_finish(void) @@ -135,10 +132,6 @@ void __init cmp_smp_setup(void) unsigned int mvpconf0 = read_c0_mvpconf0(); nvpe = ((mvpconf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; -#elif defined(CONFIG_MIPS_MT_SMTC) - unsigned int mvpconf0 = read_c0_mvpconf0(); - - nvpe = ((mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1; #endif smp_num_siblings = nvpe; } diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index 0a022ee33b2a..35bb05a13f05 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -43,10 +43,6 @@ #include <asm/time.h> #include <asm/setup.h> -#ifdef CONFIG_MIPS_MT_SMTC -#include <asm/mipsmtregs.h> -#endif /* CONFIG_MIPS_MT_SMTC */ - volatile cpumask_t cpu_callin_map; /* Bitmask of started secondaries */ int __cpu_number_map[NR_CPUS]; /* Map physical to logical */ @@ -102,12 +98,6 @@ asmlinkage void start_secondary(void) { unsigned int cpu; -#ifdef CONFIG_MIPS_MT_SMTC - /* Only do cpu_probe for first TC of CPU */ - if ((read_c0_tcbind() & TCBIND_CURTC) != 0) - __cpu_name[smp_processor_id()] = __cpu_name[0]; - else -#endif /* CONFIG_MIPS_MT_SMTC */ cpu_probe(); cpu_report(); per_cpu_trap_init(false); @@ -238,13 +228,10 @@ static void flush_tlb_mm_ipi(void *mm) * o collapses to normal function call on UP kernels * o collapses to normal function call on systems with a single shared * primary cache. - * o CONFIG_MIPS_MT_SMTC currently implies there is only one physical core. */ static inline void smp_on_other_tlbs(void (*func) (void *info), void *info) { -#ifndef CONFIG_MIPS_MT_SMTC smp_call_function(func, info, 1); -#endif } static inline void smp_on_each_tlb(void (*func) (void *info), void *info) diff --git a/arch/mips/kernel/smtc-asm.S b/arch/mips/kernel/smtc-asm.S deleted file mode 100644 index 2866863a39df..000000000000 --- a/arch/mips/kernel/smtc-asm.S +++ /dev/null @@ -1,133 +0,0 @@ -/* - * Assembly Language Functions for MIPS MT SMTC support - */ - -/* - * This file should be built into the kernel only if CONFIG_MIPS_MT_SMTC is set. */ - -#include <asm/regdef.h> -#include <asm/asmmacro.h> -#include <asm/stackframe.h> -#include <asm/irqflags.h> - -/* - * "Software Interrupt" linkage. - * - * This is invoked when an "Interrupt" is sent from one TC to another, - * where the TC to be interrupted is halted, has it's Restart address - * and Status values saved by the "remote control" thread, then modified - * to cause execution to begin here, in kenel mode. This code then - * disguises the TC state as that of an exception and transfers - * control to the general exception or vectored interrupt handler. - */ - .set noreorder - -/* -The __smtc_ipi_vector would use k0 and k1 as temporaries and -1) Set EXL (this is per-VPE, so this can't be done by proxy!) -2) Restore the K/CU and IXMT bits to the pre "exception" state - (EXL means no interrupts and access to the kernel map). -3) Set EPC to be the saved value of TCRestart. -4) Jump to the exception handler entry point passed by the sender. - -CAN WE PROVE THAT WE WON'T DO THIS IF INTS DISABLED?? -*/ - -/* - * Reviled and slandered vision: Set EXL and restore K/CU/IXMT - * state of pre-halt thread, then save everything and call - * thought some function pointer to imaginary_exception, which - * will parse a register value or memory message queue to - * deliver things like interprocessor interrupts. On return - * from that function, jump to the global ret_from_irq code - * to invoke the scheduler and return as appropriate. - */ - -#define PT_PADSLOT4 (PT_R0-8) -#define PT_PADSLOT5 (PT_R0-4) - - .text - .align 5 -FEXPORT(__smtc_ipi_vector) -#ifdef CONFIG_CPU_MICROMIPS - nop -#endif - .set noat - /* Disable thread scheduling to make Status update atomic */ - DMT 27 # dmt k1 - _ehb - /* Set EXL */ - mfc0 k0,CP0_STATUS - ori k0,k0,ST0_EXL - mtc0 k0,CP0_STATUS - _ehb - /* Thread scheduling now inhibited by EXL. Restore TE state. */ - andi k1,k1,VPECONTROL_TE - beqz k1,1f - emt -1: - /* - * The IPI sender has put some information on the anticipated - * kernel stack frame. If we were in user mode, this will be - * built above the saved kernel SP. If we were already in the - * kernel, it will be built above the current CPU SP. - * - * Were we in kernel mode, as indicated by CU0? - */ - sll k1,k0,3 - .set noreorder - bltz k1,2f - move k1,sp - .set reorder - /* - * If previously in user mode, set CU0 and use kernel stack. - */ - li k1,ST0_CU0 - or k1,k1,k0 - mtc0 k1,CP0_STATUS - _ehb - get_saved_sp - /* Interrupting TC will have pre-set values in slots in the new frame */ -2: subu k1,k1,PT_SIZE - /* Load TCStatus Value */ - lw k0,PT_TCSTATUS(k1) - /* Write it to TCStatus to restore CU/KSU/IXMT state */ - mtc0 k0,$2,1 - _ehb - lw k0,PT_EPC(k1) - mtc0 k0,CP0_EPC - /* Save all will redundantly recompute the SP, but use it for now */ - SAVE_ALL - CLI - TRACE_IRQS_OFF - /* Function to be invoked passed stack pad slot 5 */ - lw t0,PT_PADSLOT5(sp) - /* Argument from sender passed in stack pad slot 4 */ - lw a0,PT_PADSLOT4(sp) - LONG_L s0, TI_REGS($28) - LONG_S sp, TI_REGS($28) - PTR_LA ra, ret_from_irq - jr t0 - -/* - * Called from idle loop to provoke processing of queued IPIs - * First IPI message in queue passed as argument. - */ - -LEAF(self_ipi) - /* Before anything else, block interrupts */ - mfc0 t0,CP0_TCSTATUS - ori t1,t0,TCSTATUS_IXMT - mtc0 t1,CP0_TCSTATUS - _ehb - /* We know we're in kernel mode, so prepare stack frame */ - subu t1,sp,PT_SIZE - sw ra,PT_EPC(t1) - sw a0,PT_PADSLOT4(t1) - la t2,ipi_decode - sw t2,PT_PADSLOT5(t1) - /* Save pre-disable value of TCStatus */ - sw t0,PT_TCSTATUS(t1) - j __smtc_ipi_vector - nop -END(self_ipi) diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c deleted file mode 100644 index 38635a996cbf..000000000000 --- a/arch/mips/kernel/smtc-proc.c +++ /dev/null @@ -1,102 +0,0 @@ -/* - * /proc hooks for SMTC kernel - * Copyright (C) 2005 Mips Technologies, Inc - */ - -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/cpumask.h> -#include <linux/interrupt.h> - -#include <asm/cpu.h> -#include <asm/processor.h> -#include <linux/atomic.h> -#include <asm/hardirq.h> -#include <asm/mmu_context.h> -#include <asm/mipsregs.h> -#include <asm/cacheflush.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> - -#include <asm/smtc_proc.h> - -/* - * /proc diagnostic and statistics hooks - */ - -/* - * Statistics gathered - */ -unsigned long selfipis[NR_CPUS]; - -struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; - -atomic_t smtc_fpu_recoveries; - -static int smtc_proc_show(struct seq_file *m, void *v) -{ - int i; - extern unsigned long ebase; - - seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status); - seq_printf(m, "Config7: 0x%08x\n", read_c0_config7()); - seq_printf(m, "EBASE: 0x%08lx\n", ebase); - seq_printf(m, "Counter Interrupts taken per CPU (TC)\n"); - for (i=0; i < NR_CPUS; i++) - seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints); - seq_printf(m, "Self-IPIs by CPU:\n"); - for(i = 0; i < NR_CPUS; i++) - seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis); - seq_printf(m, "%d Recoveries of \"stolen\" FPU\n", - atomic_read(&smtc_fpu_recoveries)); - return 0; -} - -static int smtc_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, smtc_proc_show, NULL); -} - -static const struct file_operations smtc_proc_fops = { - .open = smtc_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -void init_smtc_stats(void) -{ - int i; - - for (i=0; i<NR_CPUS; i++) { - smtc_cpu_stats[i].timerints = 0; - smtc_cpu_stats[i].selfipis = 0; - } - - atomic_set(&smtc_fpu_recoveries, 0); - - proc_create("smtc", 0444, NULL, &smtc_proc_fops); -} - -static int proc_cpuinfo_chain_call(struct notifier_block *nfb, - unsigned long action_unused, void *data) -{ - struct proc_cpuinfo_notifier_args *pcn = data; - struct seq_file *m = pcn->m; - unsigned long n = pcn->n; - - if (!cpu_has_mipsmt) - return NOTIFY_OK; - - seq_printf(m, "VPE\t\t\t: %d\n", cpu_data[n].vpe_id); - seq_printf(m, "TC\t\t\t: %d\n", cpu_data[n].tc_id); - - return NOTIFY_OK; -} - -static int __init proc_cpuinfo_notifier_init(void) -{ - return proc_cpuinfo_notifier(proc_cpuinfo_chain_call, 0); -} - -subsys_initcall(proc_cpuinfo_notifier_init); diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c deleted file mode 100644 index c1681d65dd5c..000000000000 --- a/arch/mips/kernel/smtc.c +++ /dev/null @@ -1,1528 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * Copyright (C) 2004 Mips Technologies, Inc - * Copyright (C) 2008 Kevin D. Kissell - */ - -#include <linux/clockchips.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/smp.h> -#include <linux/cpumask.h> -#include <linux/interrupt.h> -#include <linux/kernel_stat.h> -#include <linux/module.h> -#include <linux/ftrace.h> -#include <linux/slab.h> - -#include <asm/cpu.h> -#include <asm/processor.h> -#include <linux/atomic.h> -#include <asm/hardirq.h> -#include <asm/hazards.h> -#include <asm/irq.h> -#include <asm/idle.h> -#include <asm/mmu_context.h> -#include <asm/mipsregs.h> -#include <asm/cacheflush.h> -#include <asm/time.h> -#include <asm/addrspace.h> -#include <asm/smtc.h> -#include <asm/smtc_proc.h> -#include <asm/setup.h> - -/* - * SMTC Kernel needs to manipulate low-level CPU interrupt mask - * in do_IRQ. These are passed in setup_irq_smtc() and stored - * in this table. - */ -unsigned long irq_hwmask[NR_IRQS]; - -#define LOCK_MT_PRA() \ - local_irq_save(flags); \ - mtflags = dmt() - -#define UNLOCK_MT_PRA() \ - emt(mtflags); \ - local_irq_restore(flags) - -#define LOCK_CORE_PRA() \ - local_irq_save(flags); \ - mtflags = dvpe() - -#define UNLOCK_CORE_PRA() \ - evpe(mtflags); \ - local_irq_restore(flags) - -/* - * Data structures purely associated with SMTC parallelism - */ - - -/* - * Table for tracking ASIDs whose lifetime is prolonged. - */ - -asiduse smtc_live_asid[MAX_SMTC_TLBS][MAX_SMTC_ASIDS]; - -/* - * Number of InterProcessor Interrupt (IPI) message buffers to allocate - */ - -#define IPIBUF_PER_CPU 4 - -struct smtc_ipi_q IPIQ[NR_CPUS]; -static struct smtc_ipi_q freeIPIq; - - -/* - * Number of FPU contexts for each VPE - */ - -static int smtc_nconf1[MAX_SMTC_VPES]; - - -/* Forward declarations */ - -void ipi_decode(struct smtc_ipi *); -static void post_direct_ipi(int cpu, struct smtc_ipi *pipi); -static void setup_cross_vpe_interrupts(unsigned int nvpe); -void init_smtc_stats(void); - -/* Global SMTC Status */ - -unsigned int smtc_status; - -/* Boot command line configuration overrides */ - -static int vpe0limit; -static int ipibuffers; -static int nostlb; -static int asidmask; -unsigned long smtc_asid_mask = 0xff; - -static int __init vpe0tcs(char *str) -{ - get_option(&str, &vpe0limit); - - return 1; -} - -static int __init ipibufs(char *str) -{ - get_option(&str, &ipibuffers); - return 1; -} - -static int __init stlb_disable(char *s) -{ - nostlb = 1; - return 1; -} - -static int __init asidmask_set(char *str) -{ - get_option(&str, &asidmask); - switch (asidmask) { - case 0x1: - case 0x3: - case 0x7: - case 0xf: - case 0x1f: - case 0x3f: - case 0x7f: - case 0xff: - smtc_asid_mask = (unsigned long)asidmask; - break; - default: - printk("ILLEGAL ASID mask 0x%x from command line\n", asidmask); - } - return 1; -} - -__setup("vpe0tcs=", vpe0tcs); -__setup("ipibufs=", ipibufs); -__setup("nostlb", stlb_disable); -__setup("asidmask=", asidmask_set); - -#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG - -static int hang_trig; - -static int __init hangtrig_enable(char *s) -{ - hang_trig = 1; - return 1; -} - - -__setup("hangtrig", hangtrig_enable); - -#define DEFAULT_BLOCKED_IPI_LIMIT 32 - -static int timerq_limit = DEFAULT_BLOCKED_IPI_LIMIT; - -static int __init tintq(char *str) -{ - get_option(&str, &timerq_limit); - return 1; -} - -__setup("tintq=", tintq); - -static int imstuckcount[MAX_SMTC_VPES][8]; -/* vpemask represents IM/IE bits of per-VPE Status registers, low-to-high */ -static int vpemask[MAX_SMTC_VPES][8] = { - {0, 0, 1, 0, 0, 0, 0, 1}, - {0, 0, 0, 0, 0, 0, 0, 1} -}; -int tcnoprog[NR_CPUS]; -static atomic_t idle_hook_initialized = ATOMIC_INIT(0); -static int clock_hang_reported[NR_CPUS]; - -#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */ - -/* - * Configure shared TLB - VPC configuration bit must be set by caller - */ - -static void smtc_configure_tlb(void) -{ - int i, tlbsiz, vpes; - unsigned long mvpconf0; - unsigned long config1val; - - /* Set up ASID preservation table */ - for (vpes=0; vpes<MAX_SMTC_TLBS; vpes++) { - for(i = 0; i < MAX_SMTC_ASIDS; i++) { - smtc_live_asid[vpes][i] = 0; - } - } - mvpconf0 = read_c0_mvpconf0(); - - if ((vpes = ((mvpconf0 & MVPCONF0_PVPE) - >> MVPCONF0_PVPE_SHIFT) + 1) > 1) { - /* If we have multiple VPEs, try to share the TLB */ - if ((mvpconf0 & MVPCONF0_TLBS) && !nostlb) { - /* - * If TLB sizing is programmable, shared TLB - * size is the total available complement. - * Otherwise, we have to take the sum of all - * static VPE TLB entries. - */ - if ((tlbsiz = ((mvpconf0 & MVPCONF0_PTLBE) - >> MVPCONF0_PTLBE_SHIFT)) == 0) { - /* - * If there's more than one VPE, there had better - * be more than one TC, because we need one to bind - * to each VPE in turn to be able to read - * its configuration state! - */ - settc(1); - /* Stop the TC from doing anything foolish */ - write_tc_c0_tchalt(TCHALT_H); - mips_ihb(); - /* No need to un-Halt - that happens later anyway */ - for (i=0; i < vpes; i++) { - write_tc_c0_tcbind(i); - /* - * To be 100% sure we're really getting the right - * information, we exit the configuration state - * and do an IHB after each rebinding. - */ - write_c0_mvpcontrol( - read_c0_mvpcontrol() & ~ MVPCONTROL_VPC ); - mips_ihb(); - /* - * Only count if the MMU Type indicated is TLB - */ - if (((read_vpe_c0_config() & MIPS_CONF_MT) >> 7) == 1) { - config1val = read_vpe_c0_config1(); - tlbsiz += ((config1val >> 25) & 0x3f) + 1; - } - - /* Put core back in configuration state */ - write_c0_mvpcontrol( - read_c0_mvpcontrol() | MVPCONTROL_VPC ); - mips_ihb(); - } - } - write_c0_mvpcontrol(read_c0_mvpcontrol() | MVPCONTROL_STLB); - ehb(); - - /* - * Setup kernel data structures to use software total, - * rather than read the per-VPE Config1 value. The values - * for "CPU 0" gets copied to all the other CPUs as part - * of their initialization in smtc_cpu_setup(). - */ - - /* MIPS32 limits TLB indices to 64 */ - if (tlbsiz > 64) - tlbsiz = 64; - cpu_data[0].tlbsize = current_cpu_data.tlbsize = tlbsiz; - smtc_status |= SMTC_TLB_SHARED; - local_flush_tlb_all(); - - printk("TLB of %d entry pairs shared by %d VPEs\n", - tlbsiz, vpes); - } else { - printk("WARNING: TLB Not Sharable on SMTC Boot!\n"); - } - } -} - - -/* - * Incrementally build the CPU map out of constituent MIPS MT cores, - * using the specified available VPEs and TCs. Plaform code needs - * to ensure that each MIPS MT core invokes this routine on reset, - * one at a time(!). - * - * This version of the build_cpu_map and prepare_cpus routines assumes - * that *all* TCs of a MIPS MT core will be used for Linux, and that - * they will be spread across *all* available VPEs (to minimise the - * loss of efficiency due to exception service serialization). - * An improved version would pick up configuration information and - * possibly leave some TCs/VPEs as "slave" processors. - * - * Use c0_MVPConf0 to find out how many TCs are available, setting up - * cpu_possible_mask and the logical/physical mappings. - */ - -int __init smtc_build_cpu_map(int start_cpu_slot) -{ - int i, ntcs; - - /* - * The CPU map isn't actually used for anything at this point, - * so it's not clear what else we should do apart from set - * everything up so that "logical" = "physical". - */ - ntcs = ((read_c0_mvpconf0() & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1; - for (i=start_cpu_slot; i<NR_CPUS && i<ntcs; i++) { - set_cpu_possible(i, true); - __cpu_number_map[i] = i; - __cpu_logical_map[i] = i; - } -#ifdef CONFIG_MIPS_MT_FPAFF - /* Initialize map of CPUs with FPUs */ - cpus_clear(mt_fpu_cpumask); -#endif - - /* One of those TC's is the one booting, and not a secondary... */ - printk("%i available secondary CPU TC(s)\n", i - 1); - - return i; -} - -/* - * Common setup before any secondaries are started - * Make sure all CPUs are in a sensible state before we boot any of the - * secondaries. - * - * For MIPS MT "SMTC" operation, we set up all TCs, spread as evenly - * as possible across the available VPEs. - */ - -static void smtc_tc_setup(int vpe, int tc, int cpu) -{ - static int cp1contexts[MAX_SMTC_VPES]; - - /* - * Make a local copy of the available FPU contexts in order - * to keep track of TCs that can have one. - */ - if (tc == 1) - { - /* - * FIXME: Multi-core SMTC hasn't been tested and the - * maximum number of VPEs may change. - */ - cp1contexts[0] = smtc_nconf1[0] - 1; - cp1contexts[1] = smtc_nconf1[1]; - } - - settc(tc); - write_tc_c0_tchalt(TCHALT_H); - mips_ihb(); - write_tc_c0_tcstatus((read_tc_c0_tcstatus() - & ~(TCSTATUS_TKSU | TCSTATUS_DA | TCSTATUS_IXMT)) - | TCSTATUS_A); - /* - * TCContext gets an offset from the base of the IPIQ array - * to be used in low-level code to detect the presence of - * an active IPI queue. - */ - write_tc_c0_tccontext((sizeof(struct smtc_ipi_q) * cpu) << 16); - - /* Bind TC to VPE. */ - write_tc_c0_tcbind(vpe); - - /* In general, all TCs should have the same cpu_data indications. */ - memcpy(&cpu_data[cpu], &cpu_data[0], sizeof(struct cpuinfo_mips)); - - /* Check to see if there is a FPU context available for this TC. */ - if (!cp1contexts[vpe]) - cpu_data[cpu].options &= ~MIPS_CPU_FPU; - else - cp1contexts[vpe]--; - - /* Store the TC and VPE into the cpu_data structure. */ - cpu_data[cpu].vpe_id = vpe; - cpu_data[cpu].tc_id = tc; - - /* FIXME: Multi-core SMTC hasn't been tested, but be prepared. */ - cpu_data[cpu].core = (read_vpe_c0_ebase() >> 1) & 0xff; -} - -/* - * Tweak to get Count registers synced as closely as possible. The - * value seems good for 34K-class cores. - */ - -#define CP0_SKEW 8 - -void smtc_prepare_cpus(int cpus) -{ - int i, vpe, tc, ntc, nvpe, tcpervpe[NR_CPUS], slop, cpu; - unsigned long flags; - unsigned long val; - int nipi; - struct smtc_ipi *pipi; - - /* disable interrupts so we can disable MT */ - local_irq_save(flags); - /* disable MT so we can configure */ - dvpe(); - dmt(); - - spin_lock_init(&freeIPIq.lock); - - /* - * We probably don't have as many VPEs as we do SMP "CPUs", - * but it's possible - and in any case we'll never use more! - */ - for (i=0; i<NR_CPUS; i++) { - IPIQ[i].head = IPIQ[i].tail = NULL; - spin_lock_init(&IPIQ[i].lock); - IPIQ[i].depth = 0; - IPIQ[i].resched_flag = 0; /* No reschedules queued initially */ - } - - /* cpu_data index starts at zero */ - cpu = 0; - cpu_data[cpu].vpe_id = 0; - cpu_data[cpu].tc_id = 0; - cpu_data[cpu].core = (read_c0_ebase() >> 1) & 0xff; - cpu++; - - /* Report on boot-time options */ - mips_mt_set_cpuoptions(); - if (vpelimit > 0) - printk("Limit of %d VPEs set\n", vpelimit); - if (tclimit > 0) - printk("Limit of %d TCs set\n", tclimit); - if (nostlb) { - printk("Shared TLB Use Inhibited - UNSAFE for Multi-VPE Operation\n"); - } - if (asidmask) - printk("ASID mask value override to 0x%x\n", asidmask); - - /* Temporary */ -#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG - if (hang_trig) - printk("Logic Analyser Trigger on suspected TC hang\n"); -#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */ - - /* Put MVPE's into 'configuration state' */ - write_c0_mvpcontrol( read_c0_mvpcontrol() | MVPCONTROL_VPC ); - - val = read_c0_mvpconf0(); - nvpe = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; - if (vpelimit > 0 && nvpe > vpelimit) - nvpe = vpelimit; - ntc = ((val & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1; - if (ntc > NR_CPUS) - ntc = NR_CPUS; - if (tclimit > 0 && ntc > tclimit) - ntc = tclimit; - slop = ntc % nvpe; - for (i = 0; i < nvpe; i++) { - tcpervpe[i] = ntc / nvpe; - if (slop) { - if((slop - i) > 0) tcpervpe[i]++; - } - } - /* Handle command line override for VPE0 */ - if (vpe0limit > ntc) vpe0limit = ntc; - if (vpe0limit > 0) { - int slopslop; - if (vpe0limit < tcpervpe[0]) { - /* Reducing TC count - distribute to others */ - slop = tcpervpe[0] - vpe0limit; - slopslop = slop % (nvpe - 1); - tcpervpe[0] = vpe0limit; - for (i = 1; i < nvpe; i++) { - tcpervpe[i] += slop / (nvpe - 1); - if(slopslop && ((slopslop - (i - 1) > 0))) - tcpervpe[i]++; - } - } else if (vpe0limit > tcpervpe[0]) { - /* Increasing TC count - steal from others */ - slop = vpe0limit - tcpervpe[0]; - slopslop = slop % (nvpe - 1); - tcpervpe[0] = vpe0limit; - for (i = 1; i < nvpe; i++) { - tcpervpe[i] -= slop / (nvpe - 1); - if(slopslop && ((slopslop - (i - 1) > 0))) - tcpervpe[i]--; - } - } - } - - /* Set up shared TLB */ - smtc_configure_tlb(); - - for (tc = 0, vpe = 0 ; (vpe < nvpe) && (tc < ntc) ; vpe++) { - /* Get number of CP1 contexts for each VPE. */ - if (tc == 0) - { - /* - * Do not call settc() for TC0 or the FPU context - * value will be incorrect. Besides, we know that - * we are TC0 anyway. - */ - smtc_nconf1[0] = ((read_vpe_c0_vpeconf1() & - VPECONF1_NCP1) >> VPECONF1_NCP1_SHIFT); - if (nvpe == 2) - { - settc(1); - smtc_nconf1[1] = ((read_vpe_c0_vpeconf1() & - VPECONF1_NCP1) >> VPECONF1_NCP1_SHIFT); - settc(0); - } - } - if (tcpervpe[vpe] == 0) - continue; - if (vpe != 0) - printk(", "); - printk("VPE %d: TC", vpe); - for (i = 0; i < tcpervpe[vpe]; i++) { - /* - * TC 0 is bound to VPE 0 at reset, - * and is presumably executing this - * code. Leave it alone! - */ - if (tc != 0) { - smtc_tc_setup(vpe, tc, cpu); - if (vpe != 0) { - /* - * Set MVP bit (possibly again). Do it - * here to catch CPUs that have no TCs - * bound to the VPE at reset. In that - * case, a TC must be bound to the VPE - * before we can set VPEControl[MVP] - */ - write_vpe_c0_vpeconf0( - read_vpe_c0_vpeconf0() | - VPECONF0_MVP); - } - cpu++; - } - printk(" %d", tc); - tc++; - } - if (vpe != 0) { - /* - * Allow this VPE to control others. - */ - write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | - VPECONF0_MVP); - - /* - * Clear any stale software interrupts from VPE's Cause - */ - write_vpe_c0_cause(0); - - /* - * Clear ERL/EXL of VPEs other than 0 - * and set restricted interrupt enable/mask. - */ - write_vpe_c0_status((read_vpe_c0_status() - & ~(ST0_BEV | ST0_ERL | ST0_EXL | ST0_IM)) - | (STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP7 - | ST0_IE)); - /* - * set config to be the same as vpe0, - * particularly kseg0 coherency alg - */ - write_vpe_c0_config(read_c0_config()); - /* Clear any pending timer interrupt */ - write_vpe_c0_compare(0); - /* Propagate Config7 */ - write_vpe_c0_config7(read_c0_config7()); - write_vpe_c0_count(read_c0_count() + CP0_SKEW); - ehb(); - } - /* enable multi-threading within VPE */ - write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() | VPECONTROL_TE); - /* enable the VPE */ - write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() | VPECONF0_VPA); - } - - /* - * Pull any physically present but unused TCs out of circulation. - */ - while (tc < (((val & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1)) { - set_cpu_possible(tc, false); - set_cpu_present(tc, false); - tc++; - } - - /* release config state */ - write_c0_mvpcontrol( read_c0_mvpcontrol() & ~ MVPCONTROL_VPC ); - - printk("\n"); - - /* Set up coprocessor affinity CPU mask(s) */ - -#ifdef CONFIG_MIPS_MT_FPAFF - for (tc = 0; tc < ntc; tc++) { - if (cpu_data[tc].options & MIPS_CPU_FPU) - cpu_set(tc, mt_fpu_cpumask); - } -#endif - - /* set up ipi interrupts... */ - - /* If we have multiple VPEs running, set up the cross-VPE interrupt */ - - setup_cross_vpe_interrupts(nvpe); - - /* Set up queue of free IPI "messages". */ - nipi = NR_CPUS * IPIBUF_PER_CPU; - if (ipibuffers > 0) - nipi = ipibuffers; - - pipi = kmalloc(nipi *sizeof(struct smtc_ipi), GFP_KERNEL); - if (pipi == NULL) - panic("kmalloc of IPI message buffers failed"); - else - printk("IPI buffer pool of %d buffers\n", nipi); - for (i = 0; i < nipi; i++) { - smtc_ipi_nq(&freeIPIq, pipi); - pipi++; - } - - /* Arm multithreading and enable other VPEs - but all TCs are Halted */ - emt(EMT_ENABLE); - evpe(EVPE_ENABLE); - local_irq_restore(flags); - /* Initialize SMTC /proc statistics/diagnostics */ - init_smtc_stats(); -} - - -/* - * Setup the PC, SP, and GP of a secondary processor and start it - * running! - * smp_bootstrap is the place to resume from - * __KSTK_TOS(idle) is apparently the stack pointer - * (unsigned long)idle->thread_info the gp - * - */ -void smtc_boot_secondary(int cpu, struct task_struct *idle) -{ - extern u32 kernelsp[NR_CPUS]; - unsigned long flags; - int mtflags; - - LOCK_MT_PRA(); - if (cpu_data[cpu].vpe_id != cpu_data[smp_processor_id()].vpe_id) { - dvpe(); - } - settc(cpu_data[cpu].tc_id); - - /* pc */ - write_tc_c0_tcrestart((unsigned long)&smp_bootstrap); - - /* stack pointer */ - kernelsp[cpu] = __KSTK_TOS(idle); - write_tc_gpr_sp(__KSTK_TOS(idle)); - - /* global pointer */ - write_tc_gpr_gp((unsigned long)task_thread_info(idle)); - - smtc_status |= SMTC_MTC_ACTIVE; - write_tc_c0_tchalt(0); - if (cpu_data[cpu].vpe_id != cpu_data[smp_processor_id()].vpe_id) { - evpe(EVPE_ENABLE); - } - UNLOCK_MT_PRA(); -} - -void smtc_init_secondary(void) -{ -} - -void smtc_smp_finish(void) -{ - int cpu = smp_processor_id(); - - /* - * Lowest-numbered CPU per VPE starts a clock tick. - * Like per_cpu_trap_init() hack, this assumes that - * SMTC init code assigns TCs consdecutively and - * in ascending order across available VPEs. - */ - if (cpu > 0 && (cpu_data[cpu].vpe_id != cpu_data[cpu - 1].vpe_id)) - write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ); - - local_irq_enable(); - - printk("TC %d going on-line as CPU %d\n", - cpu_data[smp_processor_id()].tc_id, smp_processor_id()); -} - -void smtc_cpus_done(void) -{ -} - -/* - * Support for SMTC-optimized driver IRQ registration - */ - -/* - * SMTC Kernel needs to manipulate low-level CPU interrupt mask - * in do_IRQ. These are passed in setup_irq_smtc() and stored - * in this table. - */ - -int setup_irq_smtc(unsigned int irq, struct irqaction * new, - unsigned long hwmask) -{ -#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG - unsigned int vpe = current_cpu_data.vpe_id; - - vpemask[vpe][irq - MIPS_CPU_IRQ_BASE] = 1; -#endif - irq_hwmask[irq] = hwmask; - - return setup_irq(irq, new); -} - -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF -/* - * Support for IRQ affinity to TCs - */ - -void smtc_set_irq_affinity(unsigned int irq, cpumask_t affinity) -{ - /* - * If a "fast path" cache of quickly decodable affinity state - * is maintained, this is where it gets done, on a call up - * from the platform affinity code. - */ -} - -void smtc_forward_irq(struct irq_data *d) -{ - unsigned int irq = d->irq; - int target; - - /* - * OK wise guy, now figure out how to get the IRQ - * to be serviced on an authorized "CPU". - * - * Ideally, to handle the situation where an IRQ has multiple - * eligible CPUS, we would maintain state per IRQ that would - * allow a fair distribution of service requests. Since the - * expected use model is any-or-only-one, for simplicity - * and efficiency, we just pick the easiest one to find. - */ - - target = cpumask_first(d->affinity); - - /* - * We depend on the platform code to have correctly processed - * IRQ affinity change requests to ensure that the IRQ affinity - * mask has been purged of bits corresponding to nonexistent and - * offline "CPUs", and to TCs bound to VPEs other than the VPE - * connected to the physical interrupt input for the interrupt - * in question. Otherwise we have a nasty problem with interrupt - * mask management. This is best handled in non-performance-critical - * platform IRQ affinity setting code, to minimize interrupt-time - * checks. - */ - - /* If no one is eligible, service locally */ - if (target >= NR_CPUS) - do_IRQ_no_affinity(irq); - else - smtc_send_ipi(target, IRQ_AFFINITY_IPI, irq); -} - -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ - -/* - * IPI model for SMTC is tricky, because interrupts aren't TC-specific. - * Within a VPE one TC can interrupt another by different approaches. - * The easiest to get right would probably be to make all TCs except - * the target IXMT and set a software interrupt, but an IXMT-based - * scheme requires that a handler must run before a new IPI could - * be sent, which would break the "broadcast" loops in MIPS MT. - * A more gonzo approach within a VPE is to halt the TC, extract - * its Restart, Status, and a couple of GPRs, and program the Restart - * address to emulate an interrupt. - * - * Within a VPE, one can be confident that the target TC isn't in - * a critical EXL state when halted, since the write to the Halt - * register could not have issued on the writing thread if the - * halting thread had EXL set. So k0 and k1 of the target TC - * can be used by the injection code. Across VPEs, one can't - * be certain that the target TC isn't in a critical exception - * state. So we try a two-step process of sending a software - * interrupt to the target VPE, which either handles the event - * itself (if it was the target) or injects the event within - * the VPE. - */ - -static void smtc_ipi_qdump(void) -{ - int i; - struct smtc_ipi *temp; - - for (i = 0; i < NR_CPUS ;i++) { - pr_info("IPIQ[%d]: head = 0x%x, tail = 0x%x, depth = %d\n", - i, (unsigned)IPIQ[i].head, (unsigned)IPIQ[i].tail, - IPIQ[i].depth); - temp = IPIQ[i].head; - - while (temp != IPIQ[i].tail) { - pr_debug("%d %d %d: ", temp->type, temp->dest, - (int)temp->arg); -#ifdef SMTC_IPI_DEBUG - pr_debug("%u %lu\n", temp->sender, temp->stamp); -#else - pr_debug("\n"); -#endif - temp = temp->flink; - } - } -} - -/* - * The standard atomic.h primitives don't quite do what we want - * here: We need an atomic add-and-return-previous-value (which - * could be done with atomic_add_return and a decrement) and an - * atomic set/zero-and-return-previous-value (which can't really - * be done with the atomic.h primitives). And since this is - * MIPS MT, we can assume that we have LL/SC. - */ -static inline int atomic_postincrement(atomic_t *v) -{ - unsigned long result; - - unsigned long temp; - - __asm__ __volatile__( - "1: ll %0, %2 \n" - " addu %1, %0, 1 \n" - " sc %1, %2 \n" - " beqz %1, 1b \n" - __WEAK_LLSC_MB - : "=&r" (result), "=&r" (temp), "=m" (v->counter) - : "m" (v->counter) - : "memory"); - - return result; -} - -void smtc_send_ipi(int cpu, int type, unsigned int action) -{ - int tcstatus; - struct smtc_ipi *pipi; - unsigned long flags; - int mtflags; - unsigned long tcrestart; - int set_resched_flag = (type == LINUX_SMP_IPI && - action == SMP_RESCHEDULE_YOURSELF); - - if (cpu == smp_processor_id()) { - printk("Cannot Send IPI to self!\n"); - return; - } - if (set_resched_flag && IPIQ[cpu].resched_flag != 0) - return; /* There is a reschedule queued already */ - - /* Set up a descriptor, to be delivered either promptly or queued */ - pipi = smtc_ipi_dq(&freeIPIq); - if (pipi == NULL) { - bust_spinlocks(1); - mips_mt_regdump(dvpe()); - panic("IPI Msg. Buffers Depleted"); - } - pipi->type = type; - pipi->arg = (void *)action; - pipi->dest = cpu; - if (cpu_data[cpu].vpe_id != cpu_data[smp_processor_id()].vpe_id) { - /* If not on same VPE, enqueue and send cross-VPE interrupt */ - IPIQ[cpu].resched_flag |= set_resched_flag; - smtc_ipi_nq(&IPIQ[cpu], pipi); - LOCK_CORE_PRA(); - settc(cpu_data[cpu].tc_id); - write_vpe_c0_cause(read_vpe_c0_cause() | C_SW1); - UNLOCK_CORE_PRA(); - } else { - /* - * Not sufficient to do a LOCK_MT_PRA (dmt) here, - * since ASID shootdown on the other VPE may - * collide with this operation. - */ - LOCK_CORE_PRA(); - settc(cpu_data[cpu].tc_id); - /* Halt the targeted TC */ - write_tc_c0_tchalt(TCHALT_H); - mips_ihb(); - - /* - * Inspect TCStatus - if IXMT is set, we have to queue - * a message. Otherwise, we set up the "interrupt" - * of the other TC - */ - tcstatus = read_tc_c0_tcstatus(); - - if ((tcstatus & TCSTATUS_IXMT) != 0) { - /* - * If we're in the the irq-off version of the wait - * loop, we need to force exit from the wait and - * do a direct post of the IPI. - */ - if (cpu_wait == r4k_wait_irqoff) { - tcrestart = read_tc_c0_tcrestart(); - if (address_is_in_r4k_wait_irqoff(tcrestart)) { - write_tc_c0_tcrestart(__pastwait); - tcstatus &= ~TCSTATUS_IXMT; - write_tc_c0_tcstatus(tcstatus); - goto postdirect; - } - } - /* - * Otherwise we queue the message for the target TC - * to pick up when he does a local_irq_restore() - */ - write_tc_c0_tchalt(0); - UNLOCK_CORE_PRA(); - IPIQ[cpu].resched_flag |= set_resched_flag; - smtc_ipi_nq(&IPIQ[cpu], pipi); - } else { -postdirect: - post_direct_ipi(cpu, pipi); - write_tc_c0_tchalt(0); - UNLOCK_CORE_PRA(); - } - } -} - -/* - * Send IPI message to Halted TC, TargTC/TargVPE already having been set - */ -static void post_direct_ipi(int cpu, struct smtc_ipi *pipi) -{ - struct pt_regs *kstack; - unsigned long tcstatus; - unsigned long tcrestart; - extern u32 kernelsp[NR_CPUS]; - extern void __smtc_ipi_vector(void); -//printk("%s: on %d for %d\n", __func__, smp_processor_id(), cpu); - - /* Extract Status, EPC from halted TC */ - tcstatus = read_tc_c0_tcstatus(); - tcrestart = read_tc_c0_tcrestart(); - /* If TCRestart indicates a WAIT instruction, advance the PC */ - if ((tcrestart & 0x80000000) - && ((*(unsigned int *)tcrestart & 0xfe00003f) == 0x42000020)) { - tcrestart += 4; - } - /* - * Save on TC's future kernel stack - * - * CU bit of Status is indicator that TC was - * already running on a kernel stack... - */ - if (tcstatus & ST0_CU0) { - /* Note that this "- 1" is pointer arithmetic */ - kstack = ((struct pt_regs *)read_tc_gpr_sp()) - 1; - } else { - kstack = ((struct pt_regs *)kernelsp[cpu]) - 1; - } - - kstack->cp0_epc = (long)tcrestart; - /* Save TCStatus */ - kstack->cp0_tcstatus = tcstatus; - /* Pass token of operation to be performed kernel stack pad area */ - kstack->pad0[4] = (unsigned long)pipi; - /* Pass address of function to be called likewise */ - kstack->pad0[5] = (unsigned long)&ipi_decode; - /* Set interrupt exempt and kernel mode */ - tcstatus |= TCSTATUS_IXMT; - tcstatus &= ~TCSTATUS_TKSU; - write_tc_c0_tcstatus(tcstatus); - ehb(); - /* Set TC Restart address to be SMTC IPI vector */ - write_tc_c0_tcrestart(__smtc_ipi_vector); -} - -static void ipi_resched_interrupt(void) -{ - scheduler_ipi(); -} - -static void ipi_call_interrupt(void) -{ - /* Invoke generic function invocation code in smp.c */ - smp_call_function_interrupt(); -} - -DECLARE_PER_CPU(struct clock_event_device, mips_clockevent_device); - -static void __irq_entry smtc_clock_tick_interrupt(void) -{ - unsigned int cpu = smp_processor_id(); - struct clock_event_device *cd; - int irq = MIPS_CPU_IRQ_BASE + 1; - - irq_enter(); - kstat_incr_irq_this_cpu(irq); - cd = &per_cpu(mips_clockevent_device, cpu); - cd->event_handler(cd); - irq_exit(); -} - -void ipi_decode(struct smtc_ipi *pipi) -{ - void *arg_copy = pipi->arg; - int type_copy = pipi->type; - - smtc_ipi_nq(&freeIPIq, pipi); - - switch (type_copy) { - case SMTC_CLOCK_TICK: - smtc_clock_tick_interrupt(); - break; - - case LINUX_SMP_IPI: - switch ((int)arg_copy) { - case SMP_RESCHEDULE_YOURSELF: - ipi_resched_interrupt(); - break; - case SMP_CALL_FUNCTION: - ipi_call_interrupt(); - break; - default: - printk("Impossible SMTC IPI Argument %p\n", arg_copy); - break; - } - break; -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF - case IRQ_AFFINITY_IPI: - /* - * Accept a "forwarded" interrupt that was initially - * taken by a TC who doesn't have affinity for the IRQ. - */ - do_IRQ_no_affinity((int)arg_copy); - break; -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ - default: - printk("Impossible SMTC IPI Type 0x%x\n", type_copy); - break; - } -} - -/* - * Similar to smtc_ipi_replay(), but invoked from context restore, - * so it reuses the current exception frame rather than set up a - * new one with self_ipi. - */ - -void deferred_smtc_ipi(void) -{ - int cpu = smp_processor_id(); - - /* - * Test is not atomic, but much faster than a dequeue, - * and the vast majority of invocations will have a null queue. - * If irq_disabled when this was called, then any IPIs queued - * after we test last will be taken on the next irq_enable/restore. - * If interrupts were enabled, then any IPIs added after the - * last test will be taken directly. - */ - - while (IPIQ[cpu].head != NULL) { - struct smtc_ipi_q *q = &IPIQ[cpu]; - struct smtc_ipi *pipi; - unsigned long flags; - - /* - * It may be possible we'll come in with interrupts - * already enabled. - */ - local_irq_save(flags); - spin_lock(&q->lock); - pipi = __smtc_ipi_dq(q); - spin_unlock(&q->lock); - if (pipi != NULL) { - if (pipi->type == LINUX_SMP_IPI && - (int)pipi->arg == SMP_RESCHEDULE_YOURSELF) - IPIQ[cpu].resched_flag = 0; - ipi_decode(pipi); - } - /* - * The use of the __raw_local restore isn't - * as obviously necessary here as in smtc_ipi_replay(), - * but it's more efficient, given that we're already - * running down the IPI queue. - */ - __arch_local_irq_restore(flags); - } -} - -/* - * Cross-VPE interrupts in the SMTC prototype use "software interrupts" - * set via cross-VPE MTTR manipulation of the Cause register. It would be - * in some regards preferable to have external logic for "doorbell" hardware - * interrupts. - */ - -static int cpu_ipi_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_IRQ; - -static irqreturn_t ipi_interrupt(int irq, void *dev_idm) -{ - int my_vpe = cpu_data[smp_processor_id()].vpe_id; - int my_tc = cpu_data[smp_processor_id()].tc_id; - int cpu; - struct smtc_ipi *pipi; - unsigned long tcstatus; - int sent; - unsigned long flags; - unsigned int mtflags; - unsigned int vpflags; - - /* - * So long as cross-VPE interrupts are done via - * MFTR/MTTR read-modify-writes of Cause, we need - * to stop other VPEs whenever the local VPE does - * anything similar. - */ - local_irq_save(flags); - vpflags = dvpe(); - clear_c0_cause(0x100 << MIPS_CPU_IPI_IRQ); - set_c0_status(0x100 << MIPS_CPU_IPI_IRQ); - irq_enable_hazard(); - evpe(vpflags); - local_irq_restore(flags); - - /* - * Cross-VPE Interrupt handler: Try to directly deliver IPIs - * queued for TCs on this VPE other than the current one. - * Return-from-interrupt should cause us to drain the queue - * for the current TC, so we ought not to have to do it explicitly here. - */ - - for_each_online_cpu(cpu) { - if (cpu_data[cpu].vpe_id != my_vpe) - continue; - - pipi = smtc_ipi_dq(&IPIQ[cpu]); - if (pipi != NULL) { - if (cpu_data[cpu].tc_id != my_tc) { - sent = 0; - LOCK_MT_PRA(); - settc(cpu_data[cpu].tc_id); - write_tc_c0_tchalt(TCHALT_H); - mips_ihb(); - tcstatus = read_tc_c0_tcstatus(); - if ((tcstatus & TCSTATUS_IXMT) == 0) { - post_direct_ipi(cpu, pipi); - sent = 1; - } - write_tc_c0_tchalt(0); - UNLOCK_MT_PRA(); - if (!sent) { - smtc_ipi_req(&IPIQ[cpu], pipi); - } - } else { - /* - * ipi_decode() should be called - * with interrupts off - */ - local_irq_save(flags); - if (pipi->type == LINUX_SMP_IPI && - (int)pipi->arg == SMP_RESCHEDULE_YOURSELF) - IPIQ[cpu].resched_flag = 0; - ipi_decode(pipi); - local_irq_restore(flags); - } - } - } - - return IRQ_HANDLED; -} - -static void ipi_irq_dispatch(void) -{ - do_IRQ(cpu_ipi_irq); -} - -static struct irqaction irq_ipi = { - .handler = ipi_interrupt, - .flags = IRQF_PERCPU, - .name = "SMTC_IPI" -}; - -static void setup_cross_vpe_interrupts(unsigned int nvpe) -{ - if (nvpe < 1) - return; - - if (!cpu_has_vint) - panic("SMTC Kernel requires Vectored Interrupt support"); - - set_vi_handler(MIPS_CPU_IPI_IRQ, ipi_irq_dispatch); - - setup_irq_smtc(cpu_ipi_irq, &irq_ipi, (0x100 << MIPS_CPU_IPI_IRQ)); - - irq_set_handler(cpu_ipi_irq, handle_percpu_irq); -} - -/* - * SMTC-specific hacks invoked from elsewhere in the kernel. - */ - - /* - * smtc_ipi_replay is called from raw_local_irq_restore - */ - -void smtc_ipi_replay(void) -{ - unsigned int cpu = smp_processor_id(); - - /* - * To the extent that we've ever turned interrupts off, - * we may have accumulated deferred IPIs. This is subtle. - * we should be OK: If we pick up something and dispatch - * it here, that's great. If we see nothing, but concurrent - * with this operation, another TC sends us an IPI, IXMT - * is clear, and we'll handle it as a real pseudo-interrupt - * and not a pseudo-pseudo interrupt. The important thing - * is to do the last check for queued message *after* the - * re-enabling of interrupts. - */ - while (IPIQ[cpu].head != NULL) { - struct smtc_ipi_q *q = &IPIQ[cpu]; - struct smtc_ipi *pipi; - unsigned long flags; - - /* - * It's just possible we'll come in with interrupts - * already enabled. - */ - local_irq_save(flags); - - spin_lock(&q->lock); - pipi = __smtc_ipi_dq(q); - spin_unlock(&q->lock); - /* - ** But use a raw restore here to avoid recursion. - */ - __arch_local_irq_restore(flags); - - if (pipi) { - self_ipi(pipi); - smtc_cpu_stats[cpu].selfipis++; - } - } -} - -EXPORT_SYMBOL(smtc_ipi_replay); - -void smtc_idle_loop_hook(void) -{ -#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG - int im; - int flags; - int mtflags; - int bit; - int vpe; - int tc; - int hook_ntcs; - /* - * printk within DMT-protected regions can deadlock, - * so buffer diagnostic messages for later output. - */ - char *pdb_msg; - char id_ho_db_msg[768]; /* worst-case use should be less than 700 */ - - if (atomic_read(&idle_hook_initialized) == 0) { /* fast test */ - if (atomic_add_return(1, &idle_hook_initialized) == 1) { - int mvpconf0; - /* Tedious stuff to just do once */ - mvpconf0 = read_c0_mvpconf0(); - hook_ntcs = ((mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1; - if (hook_ntcs > NR_CPUS) - hook_ntcs = NR_CPUS; - for (tc = 0; tc < hook_ntcs; tc++) { - tcnoprog[tc] = 0; - clock_hang_reported[tc] = 0; - } - for (vpe = 0; vpe < 2; vpe++) - for (im = 0; im < 8; im++) - imstuckcount[vpe][im] = 0; - printk("Idle loop test hook initialized for %d TCs\n", hook_ntcs); - atomic_set(&idle_hook_initialized, 1000); - } else { - /* Someone else is initializing in parallel - let 'em finish */ - while (atomic_read(&idle_hook_initialized) < 1000) - ; - } - } - - /* Have we stupidly left IXMT set somewhere? */ - if (read_c0_tcstatus() & 0x400) { - write_c0_tcstatus(read_c0_tcstatus() & ~0x400); - ehb(); - printk("Dangling IXMT in cpu_idle()\n"); - } - - /* Have we stupidly left an IM bit turned off? */ -#define IM_LIMIT 2000 - local_irq_save(flags); - mtflags = dmt(); - pdb_msg = &id_ho_db_msg[0]; - im = read_c0_status(); - vpe = current_cpu_data.vpe_id; - for (bit = 0; bit < 8; bit++) { - /* - * In current prototype, I/O interrupts - * are masked for VPE > 0 - */ - if (vpemask[vpe][bit]) { - if (!(im & (0x100 << bit))) - imstuckcount[vpe][bit]++; - else - imstuckcount[vpe][bit] = 0; - if (imstuckcount[vpe][bit] > IM_LIMIT) { - set_c0_status(0x100 << bit); - ehb(); - imstuckcount[vpe][bit] = 0; - pdb_msg += sprintf(pdb_msg, - "Dangling IM %d fixed for VPE %d\n", bit, - vpe); - } - } - } - - emt(mtflags); - local_irq_restore(flags); - if (pdb_msg != &id_ho_db_msg[0]) - printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg); -#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */ - - smtc_ipi_replay(); -} - -void smtc_soft_dump(void) -{ - int i; - - printk("Counter Interrupts taken per CPU (TC)\n"); - for (i=0; i < NR_CPUS; i++) { - printk("%d: %ld\n", i, smtc_cpu_stats[i].timerints); - } - printk("Self-IPI invocations:\n"); - for (i=0; i < NR_CPUS; i++) { - printk("%d: %ld\n", i, smtc_cpu_stats[i].selfipis); - } - smtc_ipi_qdump(); - printk("%d Recoveries of \"stolen\" FPU\n", - atomic_read(&smtc_fpu_recoveries)); -} - - -/* - * TLB management routines special to SMTC - */ - -void smtc_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu) -{ - unsigned long flags, mtflags, tcstat, prevhalt, asid; - int tlb, i; - - /* - * It would be nice to be able to use a spinlock here, - * but this is invoked from within TLB flush routines - * that protect themselves with DVPE, so if a lock is - * held by another TC, it'll never be freed. - * - * DVPE/DMT must not be done with interrupts enabled, - * so even so most callers will already have disabled - * them, let's be really careful... - */ - - local_irq_save(flags); - if (smtc_status & SMTC_TLB_SHARED) { - mtflags = dvpe(); - tlb = 0; - } else { - mtflags = dmt(); - tlb = cpu_data[cpu].vpe_id; - } - asid = asid_cache(cpu); - - do { - if (!((asid += ASID_INC) & ASID_MASK) ) { - if (cpu_has_vtag_icache) - flush_icache_all(); - /* Traverse all online CPUs (hack requires contiguous range) */ - for_each_online_cpu(i) { - /* - * We don't need to worry about our own CPU, nor those of - * CPUs who don't share our TLB. - */ - if ((i != smp_processor_id()) && - ((smtc_status & SMTC_TLB_SHARED) || - (cpu_data[i].vpe_id == cpu_data[cpu].vpe_id))) { - settc(cpu_data[i].tc_id); - prevhalt = read_tc_c0_tchalt() & TCHALT_H; - if (!prevhalt) { - write_tc_c0_tchalt(TCHALT_H); - mips_ihb(); - } - tcstat = read_tc_c0_tcstatus(); - smtc_live_asid[tlb][(tcstat & ASID_MASK)] |= (asiduse)(0x1 << i); - if (!prevhalt) - write_tc_c0_tchalt(0); - } - } - if (!asid) /* fix version if needed */ - asid = ASID_FIRST_VERSION; - local_flush_tlb_all(); /* start new asid cycle */ - } - } while (smtc_live_asid[tlb][(asid & ASID_MASK)]); - - /* - * SMTC shares the TLB within VPEs and possibly across all VPEs. - */ - for_each_online_cpu(i) { - if ((smtc_status & SMTC_TLB_SHARED) || - (cpu_data[i].vpe_id == cpu_data[cpu].vpe_id)) - cpu_context(i, mm) = asid_cache(i) = asid; - } - - if (smtc_status & SMTC_TLB_SHARED) - evpe(mtflags); - else - emt(mtflags); - local_irq_restore(flags); -} - -/* - * Invoked from macros defined in mmu_context.h - * which must already have disabled interrupts - * and done a DVPE or DMT as appropriate. - */ - -void smtc_flush_tlb_asid(unsigned long asid) -{ - int entry; - unsigned long ehi; - - entry = read_c0_wired(); - - /* Traverse all non-wired entries */ - while (entry < current_cpu_data.tlbsize) { - write_c0_index(entry); - ehb(); - tlb_read(); - ehb(); - ehi = read_c0_entryhi(); - if ((ehi & ASID_MASK) == asid) { - /* - * Invalidate only entries with specified ASID, - * makiing sure all entries differ. - */ - write_c0_entryhi(CKSEG0 + (entry << (PAGE_SHIFT + 1))); - write_c0_entrylo0(0); - write_c0_entrylo1(0); - mtc0_tlbw_hazard(); - tlb_write_indexed(); - } - entry++; - } - write_c0_index(PARKED_INDEX); - tlbw_use_hazard(); -} - -/* - * Support for single-threading cache flush operations. - */ - -static int halt_state_save[NR_CPUS]; - -/* - * To really, really be sure that nothing is being done - * by other TCs, halt them all. This code assumes that - * a DVPE has already been done, so while their Halted - * state is theoretically architecturally unstable, in - * practice, it's not going to change while we're looking - * at it. - */ - -void smtc_cflush_lockdown(void) -{ - int cpu; - - for_each_online_cpu(cpu) { - if (cpu != smp_processor_id()) { - settc(cpu_data[cpu].tc_id); - halt_state_save[cpu] = read_tc_c0_tchalt(); - write_tc_c0_tchalt(TCHALT_H); - } - } - mips_ihb(); -} - -/* It would be cheating to change the cpu_online states during a flush! */ - -void smtc_cflush_release(void) -{ - int cpu; - - /* - * Start with a hazard barrier to ensure - * that all CACHE ops have played through. - */ - mips_ihb(); - - for_each_online_cpu(cpu) { - if (cpu != smp_processor_id()) { - settc(cpu_data[cpu].tc_id); - write_tc_c0_tchalt(halt_state_save[cpu]); - } - } - mips_ihb(); -} diff --git a/arch/mips/kernel/sync-r4k.c b/arch/mips/kernel/sync-r4k.c index c24ad5f4b324..2242bdd4370e 100644 --- a/arch/mips/kernel/sync-r4k.c +++ b/arch/mips/kernel/sync-r4k.c @@ -6,8 +6,6 @@ * not have done anything significant (but they may have had interrupts * enabled briefly - prom_smp_finish() should not be responsible for enabling * interrupts...) - * - * FIXME: broken for SMTC */ #include <linux/kernel.h> @@ -33,14 +31,6 @@ void synchronise_count_master(int cpu) unsigned long flags; unsigned int initcount; -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC needs to synchronise per VPE, not per CPU - * ignore for now - */ - return; -#endif - printk(KERN_INFO "Synchronize counters for CPU %u: ", cpu); local_irq_save(flags); @@ -110,14 +100,6 @@ void synchronise_count_slave(int cpu) int i; unsigned int initcount; -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC needs to synchronise per VPE, not per CPU - * ignore for now - */ - return; -#endif - /* * Not every cpu is online at the time this gets called, * so we first wait for the master to say everyone is ready diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c index dcb8e5d3bb8a..8d0170969e22 100644 --- a/arch/mips/kernel/time.c +++ b/arch/mips/kernel/time.c @@ -26,7 +26,6 @@ #include <asm/cpu-features.h> #include <asm/cpu-type.h> #include <asm/div64.h> -#include <asm/smtc_ipi.h> #include <asm/time.h> /* diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 074e857ced28..3a2672907f80 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -370,9 +370,6 @@ void __noreturn die(const char *str, struct pt_regs *regs) { static int die_counter; int sig = SIGSEGV; -#ifdef CONFIG_MIPS_MT_SMTC - unsigned long dvpret; -#endif /* CONFIG_MIPS_MT_SMTC */ oops_enter(); @@ -382,13 +379,7 @@ void __noreturn die(const char *str, struct pt_regs *regs) console_verbose(); raw_spin_lock_irq(&die_lock); -#ifdef CONFIG_MIPS_MT_SMTC - dvpret = dvpe(); -#endif /* CONFIG_MIPS_MT_SMTC */ bust_spinlocks(1); -#ifdef CONFIG_MIPS_MT_SMTC - mips_mt_regdump(dvpret); -#endif /* CONFIG_MIPS_MT_SMTC */ printk("%s[#%d]:\n", str, ++die_counter); show_registers(regs); @@ -1759,19 +1750,6 @@ static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs) extern char rollback_except_vec_vi; char *vec_start = using_rollback_handler() ? &rollback_except_vec_vi : &except_vec_vi; -#ifdef CONFIG_MIPS_MT_SMTC - /* - * We need to provide the SMTC vectored interrupt handler - * not only with the address of the handler, but with the - * Status.IM bit to be masked before going there. - */ - extern char except_vec_vi_mori; -#if defined(CONFIG_CPU_MICROMIPS) || defined(CONFIG_CPU_BIG_ENDIAN) - const int mori_offset = &except_vec_vi_mori - vec_start + 2; -#else - const int mori_offset = &except_vec_vi_mori - vec_start; -#endif -#endif /* CONFIG_MIPS_MT_SMTC */ #if defined(CONFIG_CPU_MICROMIPS) || defined(CONFIG_CPU_BIG_ENDIAN) const int lui_offset = &except_vec_vi_lui - vec_start + 2; const int ori_offset = &except_vec_vi_ori - vec_start + 2; @@ -1795,12 +1773,6 @@ static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs) #else handler_len); #endif -#ifdef CONFIG_MIPS_MT_SMTC - BUG_ON(n > 7); /* Vector index %d exceeds SMTC maximum. */ - - h = (u16 *)(b + mori_offset); - *h = (0x100 << n); -#endif /* CONFIG_MIPS_MT_SMTC */ h = (u16 *)(b + lui_offset); *h = (handler >> 16) & 0xffff; h = (u16 *)(b + ori_offset); @@ -1870,20 +1842,6 @@ void per_cpu_trap_init(bool is_boot_cpu) unsigned int cpu = smp_processor_id(); unsigned int status_set = ST0_CU0; unsigned int hwrena = cpu_hwrena_impl_bits; -#ifdef CONFIG_MIPS_MT_SMTC - int secondaryTC = 0; - int bootTC = (cpu == 0); - - /* - * Only do per_cpu_trap_init() for first TC of Each VPE. - * Note that this hack assumes that the SMTC init code - * assigns TCs consecutively and in ascending order. - */ - - if (((read_c0_tcbind() & TCBIND_CURTC) != 0) && - ((read_c0_tcbind() & TCBIND_CURVPE) == cpu_data[cpu - 1].vpe_id)) - secondaryTC = 1; -#endif /* CONFIG_MIPS_MT_SMTC */ /* * Disable coprocessors and select 32-bit or 64-bit addressing @@ -1911,10 +1869,6 @@ void per_cpu_trap_init(bool is_boot_cpu) if (hwrena) write_c0_hwrena(hwrena); -#ifdef CONFIG_MIPS_MT_SMTC - if (!secondaryTC) { -#endif /* CONFIG_MIPS_MT_SMTC */ - if (cpu_has_veic || cpu_has_vint) { unsigned long sr = set_c0_status(ST0_BEV); write_c0_ebase(ebase); @@ -1949,10 +1903,6 @@ void per_cpu_trap_init(bool is_boot_cpu) cp0_perfcount_irq = -1; } -#ifdef CONFIG_MIPS_MT_SMTC - } -#endif /* CONFIG_MIPS_MT_SMTC */ - if (!cpu_data[cpu].asid_cache) cpu_data[cpu].asid_cache = ASID_FIRST_VERSION; @@ -1961,23 +1911,10 @@ void per_cpu_trap_init(bool is_boot_cpu) BUG_ON(current->mm); enter_lazy_tlb(&init_mm, current); -#ifdef CONFIG_MIPS_MT_SMTC - if (bootTC) { -#endif /* CONFIG_MIPS_MT_SMTC */ /* Boot CPU's cache setup in setup_arch(). */ if (!is_boot_cpu) cpu_cache_init(); tlb_init(); -#ifdef CONFIG_MIPS_MT_SMTC - } else if (!secondaryTC) { - /* - * First TC in non-boot VPE must do subset of tlb_init() - * for MMU countrol registers. - */ - write_c0_pagemask(PM_DEFAULT_MASK); - write_c0_wired(0); - } -#endif /* CONFIG_MIPS_MT_SMTC */ TLBMISS_HANDLER_SETUP(); } diff --git a/arch/mips/kernel/vpe-mt.c b/arch/mips/kernel/vpe-mt.c index 949ae0e17018..2e003b11a098 100644 --- a/arch/mips/kernel/vpe-mt.c +++ b/arch/mips/kernel/vpe-mt.c @@ -127,9 +127,8 @@ int vpe_run(struct vpe *v) clear_c0_mvpcontrol(MVPCONTROL_VPC); /* - * SMTC/SMVP kernels manage VPE enable independently, - * but uniprocessor kernels need to turn it on, even - * if that wasn't the pre-dvpe() state. + * SMVP kernels manage VPE enable independently, but uniprocessor + * kernels need to turn it on, even if that wasn't the pre-dvpe() state. */ #ifdef CONFIG_SMP evpe(vpeflags); @@ -454,12 +453,11 @@ int __init vpe_module_init(void) settc(tc); - /* Any TC that is bound to VPE0 gets left as is - in - * case we are running SMTC on VPE0. A TC that is bound - * to any other VPE gets bound to VPE0, ideally I'd like - * to make it homeless but it doesn't appear to let me - * bind a TC to a non-existent VPE. Which is perfectly - * reasonable. + /* + * A TC that is bound to any other VPE gets bound to + * VPE0, ideally I'd like to make it homeless but it + * doesn't appear to let me bind a TC to a non-existent + * VPE. Which is perfectly reasonable. * * The (un)bound state is visible to an EJTAG probe so * may notify GDB... diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c index 85685e1cdb89..030568a70ac4 100644 --- a/arch/mips/lantiq/irq.c +++ b/arch/mips/lantiq/irq.c @@ -61,7 +61,7 @@ /* we have a cascade of 8 irqs */ #define MIPS_CPU_IRQ_CASCADE 8 -#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_MIPS_MT_SMP int gic_present; #endif @@ -440,7 +440,7 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent) arch_init_ipiirq(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ, &irq_call); #endif -#if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC) +#ifndef CONFIG_MIPS_MT_SMP set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5); #else diff --git a/arch/mips/lib/mips-atomic.c b/arch/mips/lib/mips-atomic.c index 6807f7172eaf..57bcdaf1f1c8 100644 --- a/arch/mips/lib/mips-atomic.c +++ b/arch/mips/lib/mips-atomic.c @@ -15,7 +15,7 @@ #include <linux/export.h> #include <linux/stringify.h> -#if !defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT_SMTC) +#ifndef CONFIG_CPU_MIPSR2 /* * For cli() we have to insert nops to make sure that the new value @@ -42,12 +42,7 @@ notrace void arch_local_irq_disable(void) __asm__ __volatile__( " .set push \n" " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 $1, $2, 1 \n" - " ori $1, 0x400 \n" - " .set noreorder \n" - " mtc0 $1, $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) +#if defined(CONFIG_CPU_MIPSR2) /* see irqflags.h for inline function */ #else " mfc0 $1,$12 \n" @@ -77,13 +72,7 @@ notrace unsigned long arch_local_irq_save(void) " .set push \n" " .set reorder \n" " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 %[flags], $2, 1 \n" - " ori $1, %[flags], 0x400 \n" - " .set noreorder \n" - " mtc0 $1, $2, 1 \n" - " andi %[flags], %[flags], 0x400 \n" -#elif defined(CONFIG_CPU_MIPSR2) +#if defined(CONFIG_CPU_MIPSR2) /* see irqflags.h for inline function */ #else " mfc0 %[flags], $12 \n" @@ -108,29 +97,13 @@ notrace void arch_local_irq_restore(unsigned long flags) { unsigned long __tmp1; -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC kernel needs to do a software replay of queued - * IPIs, at the cost of branch and call overhead on each - * local_irq_restore() - */ - if (unlikely(!(flags & 0x0400))) - smtc_ipi_replay(); -#endif preempt_disable(); __asm__ __volatile__( " .set push \n" " .set noreorder \n" " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 $1, $2, 1 \n" - " andi %[flags], 0x400 \n" - " ori $1, 0x400 \n" - " xori $1, 0x400 \n" - " or %[flags], $1 \n" - " mtc0 %[flags], $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU) +#if defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU) /* see irqflags.h for inline function */ #elif defined(CONFIG_CPU_MIPSR2) /* see irqflags.h for inline function */ @@ -163,14 +136,7 @@ notrace void __arch_local_irq_restore(unsigned long flags) " .set push \n" " .set noreorder \n" " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 $1, $2, 1 \n" - " andi %[flags], 0x400 \n" - " ori $1, 0x400 \n" - " xori $1, 0x400 \n" - " or %[flags], $1 \n" - " mtc0 %[flags], $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU) +#if defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU) /* see irqflags.h for inline function */ #elif defined(CONFIG_CPU_MIPSR2) /* see irqflags.h for inline function */ @@ -192,4 +158,4 @@ notrace void __arch_local_irq_restore(unsigned long flags) } EXPORT_SYMBOL(__arch_local_irq_restore); -#endif /* !defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT_SMTC) */ +#endif /* !CONFIG_CPU_MIPSR2 */ diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 7bc14ffc7a1c..5c2128283ba6 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -50,7 +50,7 @@ static inline void r4k_on_each_cpu(void (*func) (void *info), void *info) { preempt_disable(); -#if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC) +#ifndef CONFIG_MIPS_MT_SMP smp_call_function(func, info, 1); #endif func(info); @@ -427,7 +427,7 @@ static void r4k___flush_cache_all(void) static inline int has_valid_asid(const struct mm_struct *mm) { -#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_MIPS_MT_SMP int i; for_each_online_cpu(i) diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index 4fc74c78265a..609a0cd749ff 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -44,27 +44,6 @@ #include <asm/tlb.h> #include <asm/fixmap.h> -/* Atomicity and interruptability */ -#ifdef CONFIG_MIPS_MT_SMTC - -#include <asm/mipsmtregs.h> - -#define ENTER_CRITICAL(flags) \ - { \ - unsigned int mvpflags; \ - local_irq_save(flags);\ - mvpflags = dvpe() -#define EXIT_CRITICAL(flags) \ - evpe(mvpflags); \ - local_irq_restore(flags); \ - } -#else - -#define ENTER_CRITICAL(flags) local_irq_save(flags) -#define EXIT_CRITICAL(flags) local_irq_restore(flags) - -#endif /* CONFIG_MIPS_MT_SMTC */ - /* * We have up to 8 empty zeroed pages so we can map one of the right colour * when needed. This is necessary only on R4000 / R4400 SC and MC versions @@ -100,20 +79,6 @@ void setup_zero_pages(void) zero_page_mask = ((PAGE_SIZE << order) - 1) & PAGE_MASK; } -#ifdef CONFIG_MIPS_MT_SMTC -static pte_t *kmap_coherent_pte; -static void __init kmap_coherent_init(void) -{ - unsigned long vaddr; - - /* cache the first coherent kmap pte */ - vaddr = __fix_to_virt(FIX_CMAP_BEGIN); - kmap_coherent_pte = kmap_get_fixmap_pte(vaddr); -} -#else -static inline void kmap_coherent_init(void) {} -#endif - void *kmap_coherent(struct page *page, unsigned long addr) { enum fixed_addresses idx; @@ -126,12 +91,7 @@ void *kmap_coherent(struct page *page, unsigned long addr) pagefault_disable(); idx = (addr >> PAGE_SHIFT) & (FIX_N_COLOURS - 1); -#ifdef CONFIG_MIPS_MT_SMTC - idx += FIX_N_COLOURS * smp_processor_id() + - (in_interrupt() ? (FIX_N_COLOURS * NR_CPUS) : 0); -#else idx += in_interrupt() ? FIX_N_COLOURS : 0; -#endif vaddr = __fix_to_virt(FIX_CMAP_END - idx); pte = mk_pte(page, PAGE_KERNEL); #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) @@ -140,44 +100,29 @@ void *kmap_coherent(struct page *page, unsigned long addr) entrylo = pte_to_entrylo(pte_val(pte)); #endif - ENTER_CRITICAL(flags); + local_irq_save(flags); old_ctx = read_c0_entryhi(); write_c0_entryhi(vaddr & (PAGE_MASK << 1)); write_c0_entrylo0(entrylo); write_c0_entrylo1(entrylo); -#ifdef CONFIG_MIPS_MT_SMTC - set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte); - /* preload TLB instead of local_flush_tlb_one() */ - mtc0_tlbw_hazard(); - tlb_probe(); - tlb_probe_hazard(); - tlbidx = read_c0_index(); - mtc0_tlbw_hazard(); - if (tlbidx < 0) - tlb_write_random(); - else - tlb_write_indexed(); -#else tlbidx = read_c0_wired(); write_c0_wired(tlbidx + 1); write_c0_index(tlbidx); mtc0_tlbw_hazard(); tlb_write_indexed(); -#endif tlbw_use_hazard(); write_c0_entryhi(old_ctx); - EXIT_CRITICAL(flags); + local_irq_restore(flags); return (void*) vaddr; } void kunmap_coherent(void) { -#ifndef CONFIG_MIPS_MT_SMTC unsigned int wired; unsigned long flags, old_ctx; - ENTER_CRITICAL(flags); + local_irq_save(flags); old_ctx = read_c0_entryhi(); wired = read_c0_wired() - 1; write_c0_wired(wired); @@ -189,8 +134,7 @@ void kunmap_coherent(void) tlb_write_indexed(); tlbw_use_hazard(); write_c0_entryhi(old_ctx); - EXIT_CRITICAL(flags); -#endif + local_irq_restore(flags); pagefault_enable(); } @@ -256,7 +200,7 @@ EXPORT_SYMBOL_GPL(copy_from_user_page); void __init fixrange_init(unsigned long start, unsigned long end, pgd_t *pgd_base) { -#if defined(CONFIG_HIGHMEM) || defined(CONFIG_MIPS_MT_SMTC) +#ifdef CONFIG_HIGHMEM pgd_t *pgd; pud_t *pud; pmd_t *pmd; @@ -327,8 +271,6 @@ void __init paging_init(void) #ifdef CONFIG_HIGHMEM kmap_init(); #endif - kmap_coherent_init(); - #ifdef CONFIG_ZONE_DMA max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; #endif diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c index eeaf50f5df2b..403fa804e4f4 100644 --- a/arch/mips/mm/tlb-r4k.c +++ b/arch/mips/mm/tlb-r4k.c @@ -25,28 +25,6 @@ extern void build_tlb_refill_handler(void); -/* Atomicity and interruptability */ -#ifdef CONFIG_MIPS_MT_SMTC - -#include <asm/smtc.h> -#include <asm/mipsmtregs.h> - -#define ENTER_CRITICAL(flags) \ - { \ - unsigned int mvpflags; \ - local_irq_save(flags);\ - mvpflags = dvpe() -#define EXIT_CRITICAL(flags) \ - evpe(mvpflags); \ - local_irq_restore(flags); \ - } -#else - -#define ENTER_CRITICAL(flags) local_irq_save(flags) -#define EXIT_CRITICAL(flags) local_irq_restore(flags) - -#endif /* CONFIG_MIPS_MT_SMTC */ - /* * LOONGSON2/3 has a 4 entry itlb which is a subset of dtlb, * unfortunately, itlb is not totally transparent to software. @@ -75,7 +53,7 @@ void local_flush_tlb_all(void) unsigned long old_ctx; int entry, ftlbhighset; - ENTER_CRITICAL(flags); + local_irq_save(flags); /* Save old context and create impossible VPN2 value */ old_ctx = read_c0_entryhi(); write_c0_entrylo0(0); @@ -112,7 +90,7 @@ void local_flush_tlb_all(void) tlbw_use_hazard(); write_c0_entryhi(old_ctx); flush_itlb(); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } EXPORT_SYMBOL(local_flush_tlb_all); @@ -142,7 +120,7 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, if (cpu_context(cpu, mm) != 0) { unsigned long size, flags; - ENTER_CRITICAL(flags); + local_irq_save(flags); start = round_down(start, PAGE_SIZE << 1); end = round_up(end, PAGE_SIZE << 1); size = (end - start) >> (PAGE_SHIFT + 1); @@ -176,7 +154,7 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, drop_mmu_context(mm, cpu); } flush_itlb(); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } } @@ -184,7 +162,7 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) { unsigned long size, flags; - ENTER_CRITICAL(flags); + local_irq_save(flags); size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT; size = (size + 1) >> 1; if (size <= (current_cpu_data.tlbsizeftlbsets ? @@ -220,7 +198,7 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) local_flush_tlb_all(); } flush_itlb(); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) @@ -233,7 +211,7 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) newpid = cpu_asid(cpu, vma->vm_mm); page &= (PAGE_MASK << 1); - ENTER_CRITICAL(flags); + local_irq_save(flags); oldpid = read_c0_entryhi(); write_c0_entryhi(page | newpid); mtc0_tlbw_hazard(); @@ -253,7 +231,7 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) finish: write_c0_entryhi(oldpid); flush_itlb_vm(vma); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } } @@ -266,7 +244,7 @@ void local_flush_tlb_one(unsigned long page) unsigned long flags; int oldpid, idx; - ENTER_CRITICAL(flags); + local_irq_save(flags); oldpid = read_c0_entryhi(); page &= (PAGE_MASK << 1); write_c0_entryhi(page); @@ -285,7 +263,7 @@ void local_flush_tlb_one(unsigned long page) } write_c0_entryhi(oldpid); flush_itlb(); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } /* @@ -308,7 +286,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte) if (current->active_mm != vma->vm_mm) return; - ENTER_CRITICAL(flags); + local_irq_save(flags); pid = read_c0_entryhi() & ASID_MASK; address &= (PAGE_MASK << 1); @@ -358,7 +336,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte) } tlbw_use_hazard(); flush_itlb_vm(vma); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, @@ -369,7 +347,7 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, unsigned long old_pagemask; unsigned long old_ctx; - ENTER_CRITICAL(flags); + local_irq_save(flags); /* Save old context and create impossible VPN2 value */ old_ctx = read_c0_entryhi(); old_pagemask = read_c0_pagemask(); @@ -389,7 +367,7 @@ void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, tlbw_use_hazard(); /* What is the hazard here? */ write_c0_pagemask(old_pagemask); local_flush_tlb_all(); - EXIT_CRITICAL(flags); + local_irq_restore(flags); } #ifdef CONFIG_TRANSPARENT_HUGEPAGE @@ -399,13 +377,13 @@ int __init has_transparent_hugepage(void) unsigned int mask; unsigned long flags; - ENTER_CRITICAL(flags); + local_irq_save(flags); write_c0_pagemask(PM_HUGE_MASK); back_to_back_c0_hazard(); mask = read_c0_pagemask(); write_c0_pagemask(PM_DEFAULT_MASK); - EXIT_CRITICAL(flags); + local_irq_restore(flags); return mask == PM_HUGE_MASK; } diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile index eae0ba3876d9..a85160137904 100644 --- a/arch/mips/mti-malta/Makefile +++ b/arch/mips/mti-malta/Makefile @@ -8,6 +8,3 @@ obj-y := malta-amon.o malta-display.o malta-init.o \ malta-int.o malta-memory.o malta-platform.o \ malta-reset.o malta-setup.o malta-time.o - -# FIXME FIXME FIXME -obj-$(CONFIG_MIPS_MT_SMTC) += malta-smtc.o diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c index 4f9e44d358b7..0f60256d3784 100644 --- a/arch/mips/mti-malta/malta-init.c +++ b/arch/mips/mti-malta/malta-init.c @@ -116,8 +116,6 @@ phys_t mips_cpc_default_phys_base(void) return CPC_BASE_ADDR; } -extern struct plat_smp_ops msmtc_smp_ops; - void __init prom_init(void) { mips_display_message("LINUX"); @@ -304,8 +302,4 @@ mips_pci_controller: return; if (!register_vsmp_smp_ops()) return; - -#ifdef CONFIG_MIPS_MT_SMTC - register_smp_ops(&msmtc_smp_ops); -#endif } diff --git a/arch/mips/mti-malta/malta-int.c b/arch/mips/mti-malta/malta-int.c index b71ee809191a..ecc2785f7858 100644 --- a/arch/mips/mti-malta/malta-int.c +++ b/arch/mips/mti-malta/malta-int.c @@ -504,28 +504,9 @@ void __init arch_init_irq(void) } else if (cpu_has_vint) { set_vi_handler(MIPSCPU_INT_I8259A, malta_hw0_irqdispatch); set_vi_handler(MIPSCPU_INT_COREHI, corehi_irqdispatch); -#ifdef CONFIG_MIPS_MT_SMTC - setup_irq_smtc(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq, - (0x100 << MIPSCPU_INT_I8259A)); - setup_irq_smtc(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, - &corehi_irqaction, (0x100 << MIPSCPU_INT_COREHI)); - /* - * Temporary hack to ensure that the subsidiary device - * interrupts coing in via the i8259A, but associated - * with low IRQ numbers, will restore the Status.IM - * value associated with the i8259A. - */ - { - int i; - - for (i = 0; i < 16; i++) - irq_hwmask[i] = (0x100 << MIPSCPU_INT_I8259A); - } -#else /* Not SMTC */ setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq); setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction); -#endif /* CONFIG_MIPS_MT_SMTC */ } else { setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq); setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI, diff --git a/arch/mips/mti-malta/malta-setup.c b/arch/mips/mti-malta/malta-setup.c index bf621516afff..db7c9e5826a6 100644 --- a/arch/mips/mti-malta/malta-setup.c +++ b/arch/mips/mti-malta/malta-setup.c @@ -77,11 +77,7 @@ const char *get_system_type(void) return "MIPS Malta"; } -#if defined(CONFIG_MIPS_MT_SMTC) -const char display_string[] = " SMTC LINUX ON MALTA "; -#else const char display_string[] = " LINUX ON MALTA "; -#endif /* CONFIG_MIPS_MT_SMTC */ #ifdef CONFIG_BLK_DEV_FD static void __init fd_activate(void) diff --git a/arch/mips/mti-malta/malta-smtc.c b/arch/mips/mti-malta/malta-smtc.c deleted file mode 100644 index c4849904f013..000000000000 --- a/arch/mips/mti-malta/malta-smtc.c +++ /dev/null @@ -1,162 +0,0 @@ -/* - * Malta Platform-specific hooks for SMP operation - */ -#include <linux/irq.h> -#include <linux/init.h> - -#include <asm/mipsregs.h> -#include <asm/mipsmtregs.h> -#include <asm/smtc.h> -#include <asm/smtc_ipi.h> - -/* VPE/SMP Prototype implements platform interfaces directly */ - -/* - * Cause the specified action to be performed on a targeted "CPU" - */ - -static void msmtc_send_ipi_single(int cpu, unsigned int action) -{ - /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */ - smtc_send_ipi(cpu, LINUX_SMP_IPI, action); -} - -static void msmtc_send_ipi_mask(const struct cpumask *mask, unsigned int action) -{ - unsigned int i; - - for_each_cpu(i, mask) - msmtc_send_ipi_single(i, action); -} - -/* - * Post-config but pre-boot cleanup entry point - */ -static void msmtc_init_secondary(void) -{ - int myvpe; - - /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */ - myvpe = read_c0_tcbind() & TCBIND_CURVPE; - if (myvpe != 0) { - /* Ideally, this should be done only once per VPE, but... */ - clear_c0_status(ST0_IM); - set_c0_status((0x100 << cp0_compare_irq) - | (0x100 << MIPS_CPU_IPI_IRQ)); - if (cp0_perfcount_irq >= 0) - set_c0_status(0x100 << cp0_perfcount_irq); - } - - smtc_init_secondary(); -} - -/* - * Platform "CPU" startup hook - */ -static void msmtc_boot_secondary(int cpu, struct task_struct *idle) -{ - smtc_boot_secondary(cpu, idle); -} - -/* - * SMP initialization finalization entry point - */ -static void msmtc_smp_finish(void) -{ - smtc_smp_finish(); -} - -/* - * Hook for after all CPUs are online - */ - -static void msmtc_cpus_done(void) -{ -} - -/* - * Platform SMP pre-initialization - * - * As noted above, we can assume a single CPU for now - * but it may be multithreaded. - */ - -static void __init msmtc_smp_setup(void) -{ - /* - * we won't get the definitive value until - * we've run smtc_prepare_cpus later, but - * we would appear to need an upper bound now. - */ - smp_num_siblings = smtc_build_cpu_map(0); -} - -static void __init msmtc_prepare_cpus(unsigned int max_cpus) -{ - smtc_prepare_cpus(max_cpus); -} - -struct plat_smp_ops msmtc_smp_ops = { - .send_ipi_single = msmtc_send_ipi_single, - .send_ipi_mask = msmtc_send_ipi_mask, - .init_secondary = msmtc_init_secondary, - .smp_finish = msmtc_smp_finish, - .cpus_done = msmtc_cpus_done, - .boot_secondary = msmtc_boot_secondary, - .smp_setup = msmtc_smp_setup, - .prepare_cpus = msmtc_prepare_cpus, -}; - -#ifdef CONFIG_MIPS_MT_SMTC_IRQAFF -/* - * IRQ affinity hook - */ - - -int plat_set_irq_affinity(struct irq_data *d, const struct cpumask *affinity, - bool force) -{ - cpumask_t tmask; - int cpu = 0; - void smtc_set_irq_affinity(unsigned int irq, cpumask_t aff); - - /* - * On the legacy Malta development board, all I/O interrupts - * are routed through the 8259 and combined in a single signal - * to the CPU daughterboard, and on the CoreFPGA2/3 34K models, - * that signal is brought to IP2 of both VPEs. To avoid racing - * concurrent interrupt service events, IP2 is enabled only on - * one VPE, by convention VPE0. So long as no bits are ever - * cleared in the affinity mask, there will never be any - * interrupt forwarding. But as soon as a program or operator - * sets affinity for one of the related IRQs, we need to make - * sure that we don't ever try to forward across the VPE boundary, - * at least not until we engineer a system where the interrupt - * _ack() or _end() function can somehow know that it corresponds - * to an interrupt taken on another VPE, and perform the appropriate - * restoration of Status.IM state using MFTR/MTTR instead of the - * normal local behavior. We also ensure that no attempt will - * be made to forward to an offline "CPU". - */ - - cpumask_copy(&tmask, affinity); - for_each_cpu(cpu, affinity) { - if ((cpu_data[cpu].vpe_id != 0) || !cpu_online(cpu)) - cpu_clear(cpu, tmask); - } - cpumask_copy(d->affinity, &tmask); - - if (cpus_empty(tmask)) - /* - * We could restore a default mask here, but the - * runtime code can anyway deal with the null set - */ - printk(KERN_WARNING - "IRQ affinity leaves no legal CPU for IRQ %d\n", d->irq); - - /* Do any generic SMTC IRQ affinity setup */ - smtc_set_irq_affinity(d->irq, tmask); - - return IRQ_SET_MASK_OK_NOCOPY; -} -#endif /* CONFIG_MIPS_MT_SMTC_IRQAFF */ diff --git a/arch/mips/pmcs-msp71xx/Makefile b/arch/mips/pmcs-msp71xx/Makefile index 9201c8b3858d..d4f7220f2485 100644 --- a/arch/mips/pmcs-msp71xx/Makefile +++ b/arch/mips/pmcs-msp71xx/Makefile @@ -10,4 +10,3 @@ obj-$(CONFIG_PCI) += msp_pci.o obj-$(CONFIG_MSP_HAS_MAC) += msp_eth.o obj-$(CONFIG_MSP_HAS_USB) += msp_usb.o obj-$(CONFIG_MIPS_MT_SMP) += msp_smp.o -obj-$(CONFIG_MIPS_MT_SMTC) += msp_smtc.o diff --git a/arch/mips/pmcs-msp71xx/msp_irq.c b/arch/mips/pmcs-msp71xx/msp_irq.c index 9da5619c00a5..941744aabb51 100644 --- a/arch/mips/pmcs-msp71xx/msp_irq.c +++ b/arch/mips/pmcs-msp71xx/msp_irq.c @@ -32,7 +32,7 @@ extern void msp_vsmp_int_init(void); /* vectored interrupt implementation */ -/* SW0/1 interrupts are used for SMP/SMTC */ +/* SW0/1 interrupts are used for SMP */ static inline void mac0_int_dispatch(void) { do_IRQ(MSP_INT_MAC0); } static inline void mac1_int_dispatch(void) { do_IRQ(MSP_INT_MAC1); } static inline void mac2_int_dispatch(void) { do_IRQ(MSP_INT_SAR); } @@ -138,14 +138,6 @@ void __init arch_init_irq(void) set_vi_handler(MSP_INT_SEC, sec_int_dispatch); #ifdef CONFIG_MIPS_MT_SMP msp_vsmp_int_init(); -#elif defined CONFIG_MIPS_MT_SMTC - /*Set hwmask for all platform devices */ - irq_hwmask[MSP_INT_MAC0] = C_IRQ0; - irq_hwmask[MSP_INT_MAC1] = C_IRQ1; - irq_hwmask[MSP_INT_USB] = C_IRQ2; - irq_hwmask[MSP_INT_SAR] = C_IRQ3; - irq_hwmask[MSP_INT_SEC] = C_IRQ5; - #endif /* CONFIG_MIPS_MT_SMP */ #endif /* CONFIG_MIPS_MT */ /* setup the cascaded interrupts */ @@ -153,8 +145,10 @@ void __init arch_init_irq(void) setup_irq(MSP_INT_PER, &per_cascade_msp); #else - /* setup the 2nd-level SLP register based interrupt controller */ - /* VSMP /SMTC support support is not enabled for SLP */ + /* + * Setup the 2nd-level SLP register based interrupt controller. + * VSMP support support is not enabled for SLP. + */ msp_slp_irq_init(); /* setup the cascaded SLP/PER interrupts */ diff --git a/arch/mips/pmcs-msp71xx/msp_irq_cic.c b/arch/mips/pmcs-msp71xx/msp_irq_cic.c index e49b499f66db..b8df2f7b3328 100644 --- a/arch/mips/pmcs-msp71xx/msp_irq_cic.c +++ b/arch/mips/pmcs-msp71xx/msp_irq_cic.c @@ -120,10 +120,9 @@ static void msp_cic_irq_ack(struct irq_data *d) * hurt for the others */ *CIC_STS_REG = (1 << (d->irq - MSP_CIC_INTBASE)); - smtc_im_ack_irq(d->irq); } -/*Note: Limiting to VSMP . Not tested in SMTC */ +/* Note: Limiting to VSMP. */ #ifdef CONFIG_MIPS_MT_SMP static int msp_cic_irq_set_affinity(struct irq_data *d, @@ -183,10 +182,6 @@ void __init msp_cic_irq_init(void) for (i = MSP_CIC_INTBASE ; i < MSP_CIC_INTBASE + 32 ; i++) { irq_set_chip_and_handler(i, &msp_cic_irq_controller, handle_level_irq); -#ifdef CONFIG_MIPS_MT_SMTC - /* Mask of CIC interrupt */ - irq_hwmask[i] = C_IRQ4; -#endif } /* Initialize the PER interrupt sub-system */ diff --git a/arch/mips/pmcs-msp71xx/msp_irq_per.c b/arch/mips/pmcs-msp71xx/msp_irq_per.c index d1fd530479d4..a111836bcec2 100644 --- a/arch/mips/pmcs-msp71xx/msp_irq_per.c +++ b/arch/mips/pmcs-msp71xx/msp_irq_per.c @@ -113,9 +113,6 @@ void __init msp_per_irq_init(void) /* initialize all the IRQ descriptors */ for (i = MSP_PER_INTBASE; i < MSP_PER_INTBASE + 32; i++) { irq_set_chip(i, &msp_per_irq_controller); -#ifdef CONFIG_MIPS_MT_SMTC - irq_hwmask[i] = C_IRQ4; -#endif } } diff --git a/arch/mips/pmcs-msp71xx/msp_setup.c b/arch/mips/pmcs-msp71xx/msp_setup.c index ba9d518dc624..4f925e06c414 100644 --- a/arch/mips/pmcs-msp71xx/msp_setup.c +++ b/arch/mips/pmcs-msp71xx/msp_setup.c @@ -147,8 +147,6 @@ void __init plat_mem_setup(void) pm_power_off = msp_power_off; } -extern struct plat_smp_ops msp_smtc_smp_ops; - void __init prom_init(void) { unsigned long family; @@ -229,9 +227,5 @@ void __init prom_init(void) */ msp_serial_setup(); - if (register_vsmp_smp_ops()) { -#ifdef CONFIG_MIPS_MT_SMTC - register_smp_ops(&msp_smtc_smp_ops); -#endif - } + register_vsmp_smp_ops(); } diff --git a/arch/mips/pmcs-msp71xx/msp_smtc.c b/arch/mips/pmcs-msp71xx/msp_smtc.c deleted file mode 100644 index 6b5607fce279..000000000000 --- a/arch/mips/pmcs-msp71xx/msp_smtc.c +++ /dev/null @@ -1,104 +0,0 @@ -/* - * MSP71xx Platform-specific hooks for SMP operation - */ -#include <linux/irq.h> -#include <linux/init.h> - -#include <asm/mipsmtregs.h> -#include <asm/mipsregs.h> -#include <asm/smtc.h> -#include <asm/smtc_ipi.h> - -/* VPE/SMP Prototype implements platform interfaces directly */ - -/* - * Cause the specified action to be performed on a targeted "CPU" - */ - -static void msp_smtc_send_ipi_single(int cpu, unsigned int action) -{ - /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */ - smtc_send_ipi(cpu, LINUX_SMP_IPI, action); -} - -static void msp_smtc_send_ipi_mask(const struct cpumask *mask, - unsigned int action) -{ - unsigned int i; - - for_each_cpu(i, mask) - msp_smtc_send_ipi_single(i, action); -} - -/* - * Post-config but pre-boot cleanup entry point - */ -static void msp_smtc_init_secondary(void) -{ - int myvpe; - - /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */ - myvpe = read_c0_tcbind() & TCBIND_CURVPE; - if (myvpe > 0) - change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 | - STATUSF_IP6 | STATUSF_IP7); - smtc_init_secondary(); -} - -/* - * Platform "CPU" startup hook - */ -static void msp_smtc_boot_secondary(int cpu, struct task_struct *idle) -{ - smtc_boot_secondary(cpu, idle); -} - -/* - * SMP initialization finalization entry point - */ -static void msp_smtc_smp_finish(void) -{ - smtc_smp_finish(); -} - -/* - * Hook for after all CPUs are online - */ - -static void msp_smtc_cpus_done(void) -{ -} - -/* - * Platform SMP pre-initialization - * - * As noted above, we can assume a single CPU for now - * but it may be multithreaded. - */ - -static void __init msp_smtc_smp_setup(void) -{ - /* - * we won't get the definitive value until - * we've run smtc_prepare_cpus later, but - */ - - if (read_c0_config3() & (1 << 2)) - smp_num_siblings = smtc_build_cpu_map(0); -} - -static void __init msp_smtc_prepare_cpus(unsigned int max_cpus) -{ - smtc_prepare_cpus(max_cpus); -} - -struct plat_smp_ops msp_smtc_smp_ops = { - .send_ipi_single = msp_smtc_send_ipi_single, - .send_ipi_mask = msp_smtc_send_ipi_mask, - .init_secondary = msp_smtc_init_secondary, - .smp_finish = msp_smtc_smp_finish, - .cpus_done = msp_smtc_cpus_done, - .boot_secondary = msp_smtc_boot_secondary, - .smp_setup = msp_smtc_smp_setup, - .prepare_cpus = msp_smtc_prepare_cpus, -}; |