aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorWill Deacon <will.deacon@arm.com>2011-08-03 07:37:04 -0400
committerWill Deacon <will.deacon@arm.com>2011-08-12 10:41:15 -0400
commit72dc53acd50db066a5a5ebe1f39fae73d7e62aa8 (patch)
treecbdc3bdbd0802992d6f4db26ffa4a5a61354226d /arch
parentdfc40b24c0a37593724f3317cd485c73ee878c18 (diff)
ARM: cache: detect VIPT aliasing I-cache on ARMv6
The current cache detection code does not check for an aliasing I-cache if the D-cache is found to be VIPT aliasing. This patch fixes the problem by always checking for an aliasing I-cache on v6 and later. Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/setup.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 70bca649e925..e514c76043b4 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -280,18 +280,19 @@ static void __init cacheid_init(void)
280 if (arch >= CPU_ARCH_ARMv6) { 280 if (arch >= CPU_ARCH_ARMv6) {
281 if ((cachetype & (7 << 29)) == 4 << 29) { 281 if ((cachetype & (7 << 29)) == 4 << 29) {
282 /* ARMv7 register format */ 282 /* ARMv7 register format */
283 arch = CPU_ARCH_ARMv7;
283 cacheid = CACHEID_VIPT_NONALIASING; 284 cacheid = CACHEID_VIPT_NONALIASING;
284 if ((cachetype & (3 << 14)) == 1 << 14) 285 if ((cachetype & (3 << 14)) == 1 << 14)
285 cacheid |= CACHEID_ASID_TAGGED; 286 cacheid |= CACHEID_ASID_TAGGED;
286 else if (cpu_has_aliasing_icache(CPU_ARCH_ARMv7))
287 cacheid |= CACHEID_VIPT_I_ALIASING;
288 } else if (cachetype & (1 << 23)) {
289 cacheid = CACHEID_VIPT_ALIASING;
290 } else { 287 } else {
291 cacheid = CACHEID_VIPT_NONALIASING; 288 arch = CPU_ARCH_ARMv6;
292 if (cpu_has_aliasing_icache(CPU_ARCH_ARMv6)) 289 if (cachetype & (1 << 23))
293 cacheid |= CACHEID_VIPT_I_ALIASING; 290 cacheid = CACHEID_VIPT_ALIASING;
291 else
292 cacheid = CACHEID_VIPT_NONALIASING;
294 } 293 }
294 if (cpu_has_aliasing_icache(arch))
295 cacheid |= CACHEID_VIPT_I_ALIASING;
295 } else { 296 } else {
296 cacheid = CACHEID_VIVT; 297 cacheid = CACHEID_VIVT;
297 } 298 }