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authorCatalin Marinas <catalin.marinas@arm.com>2009-03-03 11:44:12 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-03-03 12:11:26 +0000
commitb57ee99fab25dbc12150fe66fe54dc52bc6de784 (patch)
tree21bd531baa837d47ff600d36cef524b0ff4cb94c /arch/arm
parent25ef4a67e78e1322d55f0a38783537ed89addc02 (diff)
[ARM] 5417/1: Set the correct cacheid for ARMv6 CPUs with ARMv7 style MMU
The cacheid_init() function assumes that if cpu_architecture() returns 7, the caches are VIPT_NONALIASING. The cpu_architecture() function returns the version of the supported MMU features (e.g. TEX remapping) but it doesn't make any assumptions about the cache type. The patch adds the checking of the Cache Type Register for the ARMv7 format. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/kernel/setup.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 7049815d66d..68d6494c038 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -233,12 +233,13 @@ static void __init cacheid_init(void)
unsigned int cachetype = read_cpuid_cachetype();
unsigned int arch = cpu_architecture();
- if (arch >= CPU_ARCH_ARMv7) {
- cacheid = CACHEID_VIPT_NONALIASING;
- if ((cachetype & (3 << 14)) == 1 << 14)
- cacheid |= CACHEID_ASID_TAGGED;
- } else if (arch >= CPU_ARCH_ARMv6) {
- if (cachetype & (1 << 23))
+ if (arch >= CPU_ARCH_ARMv6) {
+ if ((cachetype & (7 << 29)) == 4 << 29) {
+ /* ARMv7 register format */
+ cacheid = CACHEID_VIPT_NONALIASING;
+ if ((cachetype & (3 << 14)) == 1 << 14)
+ cacheid |= CACHEID_ASID_TAGGED;
+ } else if (cachetype & (1 << 23))
cacheid = CACHEID_VIPT_ALIASING;
else
cacheid = CACHEID_VIPT_NONALIASING;