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-rw-r--r--arch/arm/mm/cache-v6.S30
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
index 86aa689ef1aa..99fa688dfadd 100644
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -21,18 +21,22 @@
21#define D_CACHE_LINE_SIZE 32 21#define D_CACHE_LINE_SIZE 32
22#define BTB_FLUSH_SIZE 8 22#define BTB_FLUSH_SIZE 8
23 23
24#ifdef CONFIG_ARM_ERRATA_411920
25/* 24/*
26 * Invalidate the entire I cache (this code is a workaround for the ARM1136 25 * v6_flush_icache_all()
27 * erratum 411920 - Invalidate Instruction Cache operation can fail. This 26 *
28 * erratum is present in 1136, 1156 and 1176. It does not affect the MPCore. 27 * Flush the whole I-cache.
29 * 28 *
30 * Registers: 29 * ARM1136 erratum 411920 - Invalidate Instruction Cache operation can fail.
31 * r0 - set to 0 30 * This erratum is present in 1136, 1156 and 1176. It does not affect the
32 * r1 - corrupted 31 * MPCore.
32 *
33 * Registers:
34 * r0 - set to 0
35 * r1 - corrupted
33 */ 36 */
34ENTRY(v6_icache_inval_all) 37ENTRY(v6_flush_icache_all)
35 mov r0, #0 38 mov r0, #0
39#ifdef CONFIG_ARM_ERRATA_411920
36 mrs r1, cpsr 40 mrs r1, cpsr
37 cpsid ifa @ disable interrupts 41 cpsid ifa @ disable interrupts
38 mcr p15, 0, r0, c7, c5, 0 @ invalidate entire I-cache 42 mcr p15, 0, r0, c7, c5, 0 @ invalidate entire I-cache
@@ -43,8 +47,11 @@ ENTRY(v6_icache_inval_all)
43 .rept 11 @ ARM Ltd recommends at least 47 .rept 11 @ ARM Ltd recommends at least
44 nop @ 11 NOPs 48 nop @ 11 NOPs
45 .endr 49 .endr
46 mov pc, lr 50#else
51 mcr p15, 0, r0, c7, c5, 0 @ invalidate I-cache
47#endif 52#endif
53 mov pc, lr
54ENDPROC(v6_flush_icache_all)
48 55
49/* 56/*
50 * v6_flush_cache_all() 57 * v6_flush_cache_all()
@@ -60,7 +67,7 @@ ENTRY(v6_flush_kern_cache_all)
60#ifndef CONFIG_ARM_ERRATA_411920 67#ifndef CONFIG_ARM_ERRATA_411920
61 mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate 68 mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate
62#else 69#else
63 b v6_icache_inval_all 70 b v6_flush_icache_all
64#endif 71#endif
65#else 72#else
66 mcr p15, 0, r0, c7, c15, 0 @ Cache clean+invalidate 73 mcr p15, 0, r0, c7, c15, 0 @ Cache clean+invalidate
@@ -138,7 +145,7 @@ ENTRY(v6_coherent_user_range)
138#ifndef CONFIG_ARM_ERRATA_411920 145#ifndef CONFIG_ARM_ERRATA_411920
139 mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate 146 mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate
140#else 147#else
141 b v6_icache_inval_all 148 b v6_flush_icache_all
142#endif 149#endif
143#else 150#else
144 mcr p15, 0, r0, c7, c5, 6 @ invalidate BTB 151 mcr p15, 0, r0, c7, c5, 6 @ invalidate BTB
@@ -312,6 +319,7 @@ ENDPROC(v6_dma_unmap_area)
312 319
313 .type v6_cache_fns, #object 320 .type v6_cache_fns, #object
314ENTRY(v6_cache_fns) 321ENTRY(v6_cache_fns)
322 .long v6_flush_icache_all
315 .long v6_flush_kern_cache_all 323 .long v6_flush_kern_cache_all
316 .long v6_flush_user_cache_all 324 .long v6_flush_user_cache_all
317 .long v6_flush_user_cache_range 325 .long v6_flush_user_cache_range