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| author | Daniel Hellstrom <daniel@gaisler.com> | 2011-04-25 21:43:48 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-05-16 13:03:28 -0700 |
| commit | 5149bed8912f4030f52feb33326cfe794831b184 (patch) | |
| tree | 72bf22715bcad48b3cdc42f9c734bc9dd42d23fe /arch/sparc/include/asm | |
| parent | 970def654e9df1ad28ddb466bb1d123a55e1e7e7 (diff) | |
| download | lwn-5149bed8912f4030f52feb33326cfe794831b184.tar.gz lwn-5149bed8912f4030f52feb33326cfe794831b184.zip | |
sparc32,leon: added some SMP comments
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm')
| -rw-r--r-- | arch/sparc/include/asm/smp_32.h | 5 | ||||
| -rw-r--r-- | arch/sparc/include/asm/winmacro.h | 9 |
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/smp_32.h b/arch/sparc/include/asm/smp_32.h index d82d7f4c0a79..d7837dcb2525 100644 --- a/arch/sparc/include/asm/smp_32.h +++ b/arch/sparc/include/asm/smp_32.h @@ -135,6 +135,11 @@ static inline int hard_smp_processor_id(void) __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" diff --git a/arch/sparc/include/asm/winmacro.h b/arch/sparc/include/asm/winmacro.h index 5b0a06dc3bcb..a9be04b0d049 100644 --- a/arch/sparc/include/asm/winmacro.h +++ b/arch/sparc/include/asm/winmacro.h @@ -103,6 +103,7 @@ 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; \ @@ -118,6 +119,14 @@ 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; \ |