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| author | David S. Miller <davem@davemloft.net> | 2012-05-13 23:09:04 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-14 13:31:38 -0700 |
| commit | c68e5d39a502d01421cbc70d25c377e9215facef (patch) | |
| tree | 9135a68681381d94a929b57a28a1878df0134ff7 /arch/sparc/kernel/sun4d_smp.c | |
| parent | 5d83d66635bb1642f3c6a3690c28ff4afdf1ae5f (diff) | |
| download | linux-c68e5d39a502d01421cbc70d25c377e9215facef.tar.gz linux-c68e5d39a502d01421cbc70d25c377e9215facef.tar.bz2 linux-c68e5d39a502d01421cbc70d25c377e9215facef.zip | |
sparc32: Implement hard_smp_processor_id() via instruction patching.
This is the last non-trivial user of btfixup.
Like sparc64, use a special patch section to resolve the various
implementations of how to read the current CPU's ID when we don't
have current_thread_info()->cpu necessarily available.
Signed-off-by: David S. Miller <davem@davemloft.net>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'arch/sparc/kernel/sun4d_smp.c')
| -rw-r--r-- | arch/sparc/kernel/sun4d_smp.c | 27 |
1 files changed, 3 insertions, 24 deletions
diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c index f17fd287bf7d..38ca0aac2ef2 100644 --- a/arch/sparc/kernel/sun4d_smp.c +++ b/arch/sparc/kernel/sun4d_smp.c @@ -52,7 +52,7 @@ static inline void show_leds(int cpuid) void __cpuinit smp4d_callin(void) { - int cpuid = hard_smp4d_processor_id(); + int cpuid = hard_smp_processor_id(); unsigned long flags; /* Show we are alive */ @@ -354,7 +354,7 @@ static void smp4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1, /* Running cross calls. */ void smp4d_cross_call_irq(void) { - int i = hard_smp4d_processor_id(); + int i = hard_smp_processor_id(); ccall_info.processors_in[i] = 1; ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3, @@ -365,7 +365,7 @@ void smp4d_cross_call_irq(void) void smp4d_percpu_timer_interrupt(struct pt_regs *regs) { struct pt_regs *old_regs; - int cpu = hard_smp4d_processor_id(); + int cpu = hard_smp_processor_id(); struct clock_event_device *ce; static int cpu_tick[NR_CPUS]; static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd }; @@ -391,24 +391,6 @@ void smp4d_percpu_timer_interrupt(struct pt_regs *regs) set_irq_regs(old_regs); } -void __init smp4d_blackbox_id(unsigned *addr) -{ - int rd = *addr & 0x3e000000; - - addr[0] = 0xc0800800 | rd; /* lda [%g0] ASI_M_VIKING_TMP1, reg */ - addr[1] = 0x01000000; /* nop */ - addr[2] = 0x01000000; /* nop */ -} - -void __init smp4d_blackbox_current(unsigned *addr) -{ - int rd = *addr & 0x3e000000; - - addr[0] = 0xc0800800 | rd; /* lda [%g0] ASI_M_VIKING_TMP1, reg */ - addr[2] = 0x81282002 | rd | (rd >> 11); /* sll reg, 2, reg */ - addr[4] = 0x01000000; /* nop */ -} - void __init sun4d_init_smp(void) { int i; @@ -417,10 +399,7 @@ void __init sun4d_init_smp(void) t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_sun4d - linux_trap_ipi15_sun4m); /* And set btfixup... */ - BTFIXUPSET_BLACKBOX(hard_smp_processor_id, smp4d_blackbox_id); - BTFIXUPSET_BLACKBOX(load_current, smp4d_blackbox_current); BTFIXUPSET_CALL(smp_cross_call, smp4d_cross_call, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4d_processor_id, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(smp_ipi_resched, smp4d_ipi_resched, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(smp_ipi_single, smp4d_ipi_single, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(smp_ipi_mask_one, smp4d_ipi_mask_one, BTFIXUPCALL_NORM); |