diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/Kconfig | 1 | ||||
| -rw-r--r-- | arch/sh/Kconfig.cpu | 3 | ||||
| -rw-r--r-- | arch/sh/include/asm/cpu-features.h | 1 | ||||
| -rw-r--r-- | arch/sh/include/asm/mmu_context.h | 15 | ||||
| -rw-r--r-- | arch/sh/include/asm/mmu_context_32.h | 12 | ||||
| -rw-r--r-- | arch/sh/include/cpu-sh4/cpu/mmu_context.h | 35 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh4/probe.c | 2 | ||||
| -rw-r--r-- | arch/sh/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/Makefile_32 | 6 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-pteaex.c | 99 |
10 files changed, 148 insertions, 28 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index a0c879d17fd6..6c56495fd158 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -365,6 +365,7 @@ config CPU_SUBTYPE_SH7786 bool "Support SH7786 processor" select CPU_SH4A select CPU_SHX3 + select CPU_HAS_PTEAEX select ARCH_SPARSEMEM_ENABLE select SYS_SUPPORTS_NUMA diff --git a/arch/sh/Kconfig.cpu b/arch/sh/Kconfig.cpu index 0e27fe3b182b..c7d704381a6d 100644 --- a/arch/sh/Kconfig.cpu +++ b/arch/sh/Kconfig.cpu @@ -104,6 +104,9 @@ config CPU_HAS_SR_RB config CPU_HAS_PTEA bool +config CPU_HAS_PTEAEX + bool + config CPU_HAS_DSP bool diff --git a/arch/sh/include/asm/cpu-features.h b/arch/sh/include/asm/cpu-features.h index 86308aa39731..694abe490edb 100644 --- a/arch/sh/include/asm/cpu-features.h +++ b/arch/sh/include/asm/cpu-features.h @@ -21,5 +21,6 @@ #define CPU_HAS_LLSC 0x0040 /* movli.l/movco.l */ #define CPU_HAS_L2_CACHE 0x0080 /* Secondary cache / URAM */ #define CPU_HAS_OP32 0x0100 /* 32-bit instruction support */ +#define CPU_HAS_PTEAEX 0x0200 /* PTE ASID Extension support */ #endif /* __ASM_SH_CPU_FEATURES_H */ diff --git a/arch/sh/include/asm/mmu_context.h b/arch/sh/include/asm/mmu_context.h index 5d9157bd474d..2a9c55f1a83f 100644 --- a/arch/sh/include/asm/mmu_context.h +++ b/arch/sh/include/asm/mmu_context.h @@ -19,13 +19,18 @@ * (a) TLB cache version (or round, cycle whatever expression you like) * (b) ASID (Address Space IDentifier) */ +#ifdef CONFIG_CPU_HAS_PTEAEX +#define MMU_CONTEXT_ASID_MASK 0x0000ffff +#else #define MMU_CONTEXT_ASID_MASK 0x000000ff -#define MMU_CONTEXT_VERSION_MASK 0xffffff00 -#define MMU_CONTEXT_FIRST_VERSION 0x00000100 -#define NO_CONTEXT 0UL +#endif -/* ASID is 8-bit value, so it can't be 0x100 */ -#define MMU_NO_ASID 0x100 +#define MMU_CONTEXT_VERSION_MASK (~0UL & ~MMU_CONTEXT_ASID_MASK) +#define MMU_CONTEXT_FIRST_VERSION (MMU_CONTEXT_ASID_MASK + 1) + +/* Impossible ASID value, to differentiate from NO_CONTEXT. */ +#define MMU_NO_ASID MMU_CONTEXT_FIRST_VERSION +#define NO_CONTEXT 0UL #define asid_cache(cpu) (cpu_data[cpu].asid_cache) diff --git a/arch/sh/include/asm/mmu_context_32.h b/arch/sh/include/asm/mmu_context_32.h index f4f9aebd68b7..8ef800c549ab 100644 --- a/arch/sh/include/asm/mmu_context_32.h +++ b/arch/sh/include/asm/mmu_context_32.h @@ -10,6 +10,17 @@ static inline void destroy_context(struct mm_struct *mm) /* Do nothing */ } +#ifdef CONFIG_CPU_HAS_PTEAEX +static inline void set_asid(unsigned long asid) +{ + __raw_writel(asid, MMU_PTEAEX); +} + +static inline unsigned long get_asid(void) +{ + return __raw_readl(MMU_PTEAEX) & MMU_CONTEXT_ASID_MASK; +} +#else static inline void set_asid(unsigned long asid) { unsigned long __dummy; @@ -33,6 +44,7 @@ static inline unsigned long get_asid(void) asid &= MMU_CONTEXT_ASID_MASK; return asid; } +#endif /* CONFIG_CPU_HAS_PTEAEX */ /* MMU_TTB is used for optimizing the fault handling. */ static inline void set_TTB(pgd_t *pgd) diff --git a/arch/sh/include/cpu-sh4/cpu/mmu_context.h b/arch/sh/include/cpu-sh4/cpu/mmu_context.h index 9ea8eb27b18e..3ce7ef6c2978 100644 --- a/arch/sh/include/cpu-sh4/cpu/mmu_context.h +++ b/arch/sh/include/cpu-sh4/cpu/mmu_context.h @@ -14,28 +14,35 @@ #define MMU_PTEL 0xFF000004 /* Page table entry register LOW */ #define MMU_TTB 0xFF000008 /* Translation table base register */ #define MMU_TEA 0xFF00000C /* TLB Exception Address */ -#define MMU_PTEA 0xFF000034 /* Page table entry assistance register */ +#define MMU_PTEA 0xFF000034 /* PTE assistance register */ +#define MMU_PTEAEX 0xFF00007C /* PTE ASID extension register */ #define MMUCR 0xFF000010 /* MMU Control Register */ -#define MMU_ITLB_ADDRESS_ARRAY 0xF2000000 #define MMU_UTLB_ADDRESS_ARRAY 0xF6000000 +#define MMU_UTLB_ADDRESS_ARRAY2 0xF6800000 #define MMU_PAGE_ASSOC_BIT 0x80 #define MMUCR_TI (1<<2) -#ifdef CONFIG_X2TLB -#define MMUCR_ME (1 << 7) -#else -#define MMUCR_ME (0) -#endif - #if defined(CONFIG_32BIT) && defined(CONFIG_CPU_SUBTYPE_ST40) #define MMUCR_SE (1 << 4) #else #define MMUCR_SE (0) #endif +#ifdef CONFIG_CPU_HAS_PTEAEX +#define MMUCR_AEX (1 << 6) +#else +#define MMUCR_AEX (0) +#endif + +#ifdef CONFIG_X2TLB +#define MMUCR_ME (1 << 7) +#else +#define MMUCR_ME (0) +#endif + #ifdef CONFIG_SH_STORE_QUEUES #define MMUCR_SQMD (1 << 9) #else @@ -43,17 +50,7 @@ #endif #define MMU_NTLB_ENTRIES 64 -#define MMU_CONTROL_INIT (0x05|MMUCR_SQMD|MMUCR_ME|MMUCR_SE) - -#define MMU_ITLB_DATA_ARRAY 0xF3000000 -#define MMU_UTLB_DATA_ARRAY 0xF7000000 - -#define MMU_UTLB_ENTRIES 64 -#define MMU_U_ENTRY_SHIFT 8 -#define MMU_UTLB_VALID 0x100 -#define MMU_ITLB_ENTRIES 4 -#define MMU_I_ENTRY_SHIFT 8 -#define MMU_ITLB_VALID 0x100 +#define MMU_CONTROL_INIT (0x05|MMUCR_SQMD|MMUCR_ME|MMUCR_SE|MMUCR_AEX) #define TRA 0xff000020 #define EXPEVT 0xff000024 diff --git a/arch/sh/kernel/cpu/sh4/probe.c b/arch/sh/kernel/cpu/sh4/probe.c index 2bd0ec962639..3d3a3c4425a9 100644 --- a/arch/sh/kernel/cpu/sh4/probe.c +++ b/arch/sh/kernel/cpu/sh4/probe.c @@ -134,7 +134,7 @@ int __init detect_cpu_and_cache_system(void) boot_cpu_data.icache.ways = 4; boot_cpu_data.dcache.ways = 4; boot_cpu_data.flags |= CPU_HAS_FPU | CPU_HAS_PERF_COUNTER | - CPU_HAS_LLSC; + CPU_HAS_LLSC | CPU_HAS_PTEAEX; break; case 0x3008: boot_cpu_data.icache.ways = 4; diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 61ab2a7f8647..24c60251f680 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -449,7 +449,7 @@ EXPORT_SYMBOL(get_cpu_subtype); /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */ static const char *cpu_flags[] = { "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", - "ptea", "llsc", "l2", "op32", NULL + "ptea", "llsc", "l2", "op32", "pteaex", NULL }; static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c) diff --git a/arch/sh/mm/Makefile_32 b/arch/sh/mm/Makefile_32 index 469ff1672451..986a1e055834 100644 --- a/arch/sh/mm/Makefile_32 +++ b/arch/sh/mm/Makefile_32 @@ -25,8 +25,10 @@ obj-$(CONFIG_CPU_SH4) += cache-debugfs.o endif ifdef CONFIG_MMU -obj-$(CONFIG_CPU_SH3) += tlb-sh3.o -obj-$(CONFIG_CPU_SH4) += tlb-sh4.o +tlb-$(CONFIG_CPU_SH3) := tlb-sh3.o +tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o +tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o +obj-y += $(tlb-y) ifndef CONFIG_CACHE_OFF obj-$(CONFIG_CPU_SH4) += pg-sh4.o obj-$(CONFIG_SH7705_CACHE_32KB) += pg-sh7705.o diff --git a/arch/sh/mm/tlb-pteaex.c b/arch/sh/mm/tlb-pteaex.c new file mode 100644 index 000000000000..5c9b2d781e08 --- /dev/null +++ b/arch/sh/mm/tlb-pteaex.c @@ -0,0 +1,99 @@ +/* + * arch/sh/mm/tlb-pteaex.c + * + * TLB operations for SH-X3 CPUs featuring PTE ASID Extensions. + * + * Copyright (C) 2009 Paul Mundt + * + * 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. + */ +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/io.h> +#include <asm/system.h> +#include <asm/mmu_context.h> +#include <asm/cacheflush.h> + +void update_mmu_cache(struct vm_area_struct * vma, + unsigned long address, pte_t pte) +{ + unsigned long flags; + unsigned long pteval; + unsigned long vpn; + + /* Ptrace may call this routine. */ + if (vma && current->active_mm != vma->vm_mm) + return; + +#ifndef CONFIG_CACHE_OFF + { + unsigned long pfn = pte_pfn(pte); + + if (pfn_valid(pfn)) { + struct page *page = pfn_to_page(pfn); + + if (!test_bit(PG_mapped, &page->flags)) { + unsigned long phys = pte_val(pte) & PTE_PHYS_MASK; + __flush_wback_region((void *)P1SEGADDR(phys), + PAGE_SIZE); + __set_bit(PG_mapped, &page->flags); + } + } + } +#endif + + local_irq_save(flags); + + /* Set PTEH register */ + vpn = address & MMU_VPN_MASK; + __raw_writel(vpn, MMU_PTEH); + + /* Set PTEAEX */ + __raw_writel(get_asid(), MMU_PTEAEX); + + pteval = pte.pte_low; + + /* Set PTEA register */ +#ifdef CONFIG_X2TLB + /* + * For the extended mode TLB this is trivial, only the ESZ and + * EPR bits need to be written out to PTEA, with the remainder of + * the protection bits (with the exception of the compat-mode SZ + * and PR bits, which are cleared) being written out in PTEL. + */ + __raw_writel(pte.pte_high, MMU_PTEA); +#else + /* TODO: make this look less hacky */ + __raw_writel(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA); +#endif + + /* Set PTEL register */ + pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */ +#ifdef CONFIG_CACHE_WRITETHROUGH + pteval |= _PAGE_WT; +#endif + /* conveniently, we want all the software flags to be 0 anyway */ + __raw_writel(pteval, MMU_PTEL); + + /* Load the TLB */ + asm volatile("ldtlb": /* no output */ : /* no input */ : "memory"); + local_irq_restore(flags); +} + +/* + * While SH-X2 extended TLB mode splits out the memory-mapped I/UTLB + * data arrays, SH-X3 cores with PTEAEX split out the memory-mapped + * address arrays. In compat mode the second array is inaccessible, while + * in extended mode, the legacy 8-bit ASID field in address array 1 has + * undefined behaviour. + */ +void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid, + unsigned long page) +{ + jump_to_uncached(); + __raw_writel(page, MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT); + __raw_writel(asid, MMU_UTLB_ADDRESS_ARRAY2 | MMU_PAGE_ASSOC_BIT); + back_to_cached(); +} |