diff options
Diffstat (limited to 'arch/arm/mm/cache-v7.S')
| -rw-r--r-- | arch/arm/mm/cache-v7.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S index 07c4bc8ea0a4..7a24d39661f0 100644 --- a/arch/arm/mm/cache-v7.S +++ b/arch/arm/mm/cache-v7.S | |||
| @@ -54,9 +54,15 @@ loop1: | |||
| 54 | and r1, r1, #7 @ mask of the bits for current cache only | 54 | and r1, r1, #7 @ mask of the bits for current cache only |
| 55 | cmp r1, #2 @ see what cache we have at this level | 55 | cmp r1, #2 @ see what cache we have at this level |
| 56 | blt skip @ skip if no cache, or just i-cache | 56 | blt skip @ skip if no cache, or just i-cache |
| 57 | #ifdef CONFIG_PREEMPT | ||
| 58 | save_and_disable_irqs r9 @ make cssr&csidr read atomic | ||
| 59 | #endif | ||
| 57 | mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr | 60 | mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr |
| 58 | isb @ isb to sych the new cssr&csidr | 61 | isb @ isb to sych the new cssr&csidr |
| 59 | mrc p15, 1, r1, c0, c0, 0 @ read the new csidr | 62 | mrc p15, 1, r1, c0, c0, 0 @ read the new csidr |
| 63 | #ifdef CONFIG_PREEMPT | ||
| 64 | restore_irqs_notrace r9 | ||
| 65 | #endif | ||
| 60 | and r2, r1, #7 @ extract the length of the cache lines | 66 | and r2, r1, #7 @ extract the length of the cache lines |
| 61 | add r2, r2, #4 @ add 4 (line length offset) | 67 | add r2, r2, #4 @ add 4 (line length offset) |
| 62 | ldr r4, =0x3ff | 68 | ldr r4, =0x3ff |