From c68e5d39a502d01421cbc70d25c377e9215facef Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sun, 13 May 2012 23:09:04 -0700 Subject: 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 Tested-by: Sam Ravnborg --- arch/sparc/kernel/leon_smp.c | 29 +---------------------------- 1 file changed, 1 insertion(+), 28 deletions(-) (limited to 'arch/sparc/kernel/leon_smp.c') diff --git a/arch/sparc/kernel/leon_smp.c b/arch/sparc/kernel/leon_smp.c index f3e3630e31a3..faff792d53c8 100644 --- a/arch/sparc/kernel/leon_smp.c +++ b/arch/sparc/kernel/leon_smp.c @@ -73,7 +73,7 @@ static inline unsigned long do_swap(volatile unsigned long *ptr, void __cpuinit leon_callin(void) { - int cpuid = hard_smpleon_processor_id(); + int cpuid = hard_smp_processor_id(); local_ops->cache_all(); local_ops->tlb_all(); @@ -491,39 +491,12 @@ void leon_cross_call_irq(void) ccall_info.processors_out[i] = 1; } -void __init leon_blackbox_id(unsigned *addr) -{ - int rd = *addr & 0x3e000000; - int rs1 = rd >> 11; - - /* patch places where ___b_hard_smp_processor_id appears */ - addr[0] = 0x81444000 | rd; /* rd %asr17, reg */ - addr[1] = 0x8130201c | rd | rs1; /* srl reg, 0x1c, reg */ - addr[2] = 0x01000000; /* nop */ -} - -void __init leon_blackbox_current(unsigned *addr) -{ - int rd = *addr & 0x3e000000; - int rs1 = rd >> 11; - - /* patch LOAD_CURRENT macro where ___b_load_current appears */ - addr[0] = 0x81444000 | rd; /* rd %asr17, reg */ - addr[2] = 0x8130201c | rd | rs1; /* srl reg, 0x1c, reg */ - addr[4] = 0x81282002 | rd | rs1; /* sll reg, 0x2, reg */ - -} - void __init leon_init_smp(void) { /* Patch ipi15 trap table */ t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_leon - linux_trap_ipi15_sun4m); - BTFIXUPSET_BLACKBOX(hard_smp_processor_id, leon_blackbox_id); - BTFIXUPSET_BLACKBOX(load_current, leon_blackbox_current); BTFIXUPSET_CALL(smp_cross_call, leon_cross_call, BTFIXUPCALL_NORM); - BTFIXUPSET_CALL(__hard_smp_processor_id, __leon_processor_id, - BTFIXUPCALL_NORM); BTFIXUPSET_CALL(smp_ipi_resched, leon_ipi_resched, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(smp_ipi_single, leon_ipi_single, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(smp_ipi_mask_one, leon_ipi_mask_one, BTFIXUPCALL_NORM); -- cgit v1.2.1