diff options
Diffstat (limited to 'arch/powerpc/kernel/vdso64/cacheflush.S')
| -rw-r--r-- | arch/powerpc/kernel/vdso64/cacheflush.S | 41 |
1 files changed, 29 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/vdso64/cacheflush.S b/arch/powerpc/kernel/vdso64/cacheflush.S index 66a36d3cc6ad..69c5af2b3c96 100644 --- a/arch/powerpc/kernel/vdso64/cacheflush.S +++ b/arch/powerpc/kernel/vdso64/cacheflush.S | |||
| @@ -23,29 +23,46 @@ | |||
| 23 | * | 23 | * |
| 24 | * Flushes the data cache & invalidate the instruction cache for the | 24 | * Flushes the data cache & invalidate the instruction cache for the |
| 25 | * provided range [start, end[ | 25 | * provided range [start, end[ |
| 26 | * | ||
| 27 | * Note: all CPUs supported by this kernel have a 128 bytes cache | ||
| 28 | * line size so we don't have to peek that info from the datapage | ||
| 29 | */ | 26 | */ |
| 30 | V_FUNCTION_BEGIN(__kernel_sync_dicache) | 27 | V_FUNCTION_BEGIN(__kernel_sync_dicache) |
| 31 | .cfi_startproc | 28 | .cfi_startproc |
| 32 | li r5,127 | 29 | mflr r12 |
| 33 | andc r6,r3,r5 /* round low to line bdy */ | 30 | .cfi_register lr,r12 |
| 31 | mr r11,r3 | ||
| 32 | bl V_LOCAL_FUNC(__get_datapage) | ||
| 33 | mtlr r12 | ||
| 34 | mr r10,r3 | ||
| 35 | |||
| 36 | lwz r7,CFG_DCACHE_BLOCKSZ(r10) | ||
| 37 | addi r5,r7,-1 | ||
| 38 | andc r6,r11,r5 /* round low to line bdy */ | ||
| 34 | subf r8,r6,r4 /* compute length */ | 39 | subf r8,r6,r4 /* compute length */ |
| 35 | add r8,r8,r5 /* ensure we get enough */ | 40 | add r8,r8,r5 /* ensure we get enough */ |
| 36 | srwi. r8,r8,7 /* compute line count */ | 41 | lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10) |
| 42 | srw. r8,r8,r9 /* compute line count */ | ||
| 37 | crclr cr0*4+so | 43 | crclr cr0*4+so |
| 38 | beqlr /* nothing to do? */ | 44 | beqlr /* nothing to do? */ |
| 39 | mtctr r8 | 45 | mtctr r8 |
| 40 | mr r3,r6 | 46 | 1: dcbst 0,r6 |
| 41 | 1: dcbst 0,r3 | 47 | add r6,r6,r7 |
| 42 | addi r3,r3,128 | ||
| 43 | bdnz 1b | 48 | bdnz 1b |
| 44 | sync | 49 | sync |
| 50 | |||
| 51 | /* Now invalidate the instruction cache */ | ||
| 52 | |||
| 53 | lwz r7,CFG_ICACHE_BLOCKSZ(r10) | ||
| 54 | addi r5,r7,-1 | ||
| 55 | andc r6,r11,r5 /* round low to line bdy */ | ||
| 56 | subf r8,r6,r4 /* compute length */ | ||
| 57 | add r8,r8,r5 | ||
| 58 | lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10) | ||
| 59 | srw. r8,r8,r9 /* compute line count */ | ||
| 60 | crclr cr0*4+so | ||
| 61 | beqlr /* nothing to do? */ | ||
| 45 | mtctr r8 | 62 | mtctr r8 |
| 46 | 1: icbi 0,r6 | 63 | 2: icbi 0,r6 |
| 47 | addi r6,r6,128 | 64 | add r6,r6,r7 |
| 48 | bdnz 1b | 65 | bdnz 2b |
| 49 | isync | 66 | isync |
| 50 | li r3,0 | 67 | li r3,0 |
| 51 | blr | 68 | blr |