diff options
| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2017-06-12 13:35:52 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-06-12 15:47:29 +0100 |
| commit | d360a687d99577110c181e67ebfb9a1b6fed63a2 (patch) | |
| tree | ac764253122a5234c0c229110f0b0b065a2d8f1d | |
| parent | bbeedfda8eee0b17ea16e4e157c596095458676a (diff) | |
ARM: 8682/1: V7M: Set cacheid iff DminLine or IminLine is nonzero
Cache support is optional feature in M-class cores, thus DminLine or
IminLine of Cache Type Register is zero if caches are not implemented,
but we check the whole CTR which has other features encoded there.
Let's be more precise and check for DminLine and IminLine of CTR
before we set cacheid.
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/kernel/setup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 32e1a9513dc7..4e80bf7420d4 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -315,7 +315,7 @@ static void __init cacheid_init(void) if (arch >= CPU_ARCH_ARMv6) { unsigned int cachetype = read_cpuid_cachetype(); - if ((arch == CPU_ARCH_ARMv7M) && !cachetype) { + if ((arch == CPU_ARCH_ARMv7M) && !(cachetype & 0xf000f)) { cacheid = 0; } else if ((cachetype & (7 << 29)) == 4 << 29) { /* ARMv7 register format */ |