diff options
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/include | |
parent | 5d83d66635bb1642f3c6a3690c28ff4afdf1ae5f (diff) |
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/include')
-rw-r--r-- | arch/sparc/include/asm/smp_32.h | 43 | ||||
-rw-r--r-- | arch/sparc/include/asm/winmacro.h | 49 |
2 files changed, 19 insertions, 73 deletions
diff --git a/arch/sparc/include/asm/smp_32.h b/arch/sparc/include/asm/smp_32.h index 01c51c704341..f5b325e731dd 100644 --- a/arch/sparc/include/asm/smp_32.h +++ b/arch/sparc/include/asm/smp_32.h @@ -59,12 +59,9 @@ void smp_bogo(struct seq_file *); void smp_info(struct seq_file *); BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long) -BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) BTFIXUPDEF_CALL(void, smp_ipi_resched, int); BTFIXUPDEF_CALL(void, smp_ipi_single, int); BTFIXUPDEF_CALL(void, smp_ipi_mask_one, int); -BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) -BTFIXUPDEF_BLACKBOX(load_current) #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4) @@ -117,45 +114,7 @@ extern inline int hard_smpleon_processor_id(void) return cpuid; } -#ifndef MODULE -static inline int hard_smp_processor_id(void) -{ - int cpuid; - - /* Black box - sun4m - __asm__ __volatile__("rd %%tbr, %0\n\t" - "srl %0, 12, %0\n\t" - "and %0, 3, %0\n\t" : - "=&r" (cpuid)); - - sun4d - __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" - "nop; nop" : - "=&r" (cpuid)); - - leon - __asm__ __volatile__( "rd %asr17, %0\n\t" - "srl %0, 0x1c, %0\n\t" - "nop\n\t" : - "=&r" (cpuid)); - See btfixup.h and btfixupprep.c to understand how a blackbox works. - */ - __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" - "sethi %%hi(boot_cpu_id), %0\n\t" - "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : - "=&r" (cpuid)); - return cpuid; -} -#else -static inline int hard_smp_processor_id(void) -{ - int cpuid; - - __asm__ __volatile__("mov %%o7, %%g1\n\t" - "call ___f___hard_smp_processor_id\n\t" - " nop\n\t" - "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); - return cpuid; -} -#endif +extern int hard_smp_processor_id(void); #define raw_smp_processor_id() (current_thread_info()->cpu) diff --git a/arch/sparc/include/asm/winmacro.h b/arch/sparc/include/asm/winmacro.h index a9be04b0d049..9b7b21764cde 100644 --- a/arch/sparc/include/asm/winmacro.h +++ b/arch/sparc/include/asm/winmacro.h @@ -103,37 +103,24 @@ st %scratch, [%cur_reg + TI_W_SAVED]; #ifdef CONFIG_SMP -/* Results of LOAD_CURRENT() after BTFIXUP for SUN4M, SUN4D & LEON (comments) */ -#define LOAD_CURRENT4M(dest_reg, idreg) \ - rd %tbr, %idreg; \ - sethi %hi(current_set), %dest_reg; \ - srl %idreg, 10, %idreg; \ - or %dest_reg, %lo(current_set), %dest_reg; \ - and %idreg, 0xc, %idreg; \ - ld [%idreg + %dest_reg], %dest_reg; - -#define LOAD_CURRENT4D(dest_reg, idreg) \ - lda [%g0] ASI_M_VIKING_TMP1, %idreg; \ - sethi %hi(C_LABEL(current_set)), %dest_reg; \ - sll %idreg, 2, %idreg; \ - or %dest_reg, %lo(C_LABEL(current_set)), %dest_reg; \ - ld [%idreg + %dest_reg], %dest_reg; - -#define LOAD_CURRENT_LEON(dest_reg, idreg) \ - rd %asr17, %idreg; \ - sethi %hi(current_set), %dest_reg; \ - srl %idreg, 0x1c, %idreg; \ - or %dest_reg, %lo(current_set), %dest_reg; \ - sll %idreg, 0x2, %idreg; \ - ld [%idreg + %dest_reg], %dest_reg; - -/* Blackbox - take care with this... - check smp4m and smp4d before changing this. */ -#define LOAD_CURRENT(dest_reg, idreg) \ - sethi %hi(___b_load_current), %idreg; \ - sethi %hi(current_set), %dest_reg; \ - sethi %hi(boot_cpu_id4), %idreg; \ - or %dest_reg, %lo(current_set), %dest_reg; \ - ldub [%idreg + %lo(boot_cpu_id4)], %idreg; \ +#define LOAD_CURRENT(dest_reg, idreg) \ +661: rd %tbr, %idreg; \ + srl %idreg, 10, %idreg; \ + and %idreg, 0xc, %idreg; \ + .section .cpuid_patch, "ax"; \ + /* Instruction location. */ \ + .word 661b; \ + /* SUN4D implementation. */ \ + lda [%g0] ASI_M_VIKING_TMP1, %idreg; \ + sll %idreg, 2, %idreg; \ + nop; \ + /* LEON implementation. */ \ + rd %asr17, %idreg; \ + srl %idreg, 0x1c, %idreg; \ + sll %idreg, 0x02, %idreg; \ + .previous; \ + sethi %hi(current_set), %dest_reg; \ + or %dest_reg, %lo(current_set), %dest_reg;\ ld [%idreg + %dest_reg], %dest_reg; #else #define LOAD_CURRENT(dest_reg, idreg) \ |