diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/setup.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 1939c904dae..5b121d81f9e 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -67,6 +67,8 @@ unsigned int processor_id; EXPORT_SYMBOL(processor_id); unsigned int __machine_arch_type; EXPORT_SYMBOL(__machine_arch_type); +unsigned int cacheid; +EXPORT_SYMBOL(cacheid); unsigned int __atags_pointer __initdata; @@ -229,6 +231,25 @@ int cpu_architecture(void) return cpu_arch; } +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)) + cacheid = CACHEID_VIPT_ALIASING; + else + cacheid = CACHEID_VIPT_NONALIASING; + } else { + cacheid = CACHEID_VIVT; + } +} + /* * These functions re-use the assembly code in head.S, which * already provide the required functionality. @@ -278,6 +299,7 @@ static void __init setup_processor(void) elf_hwcap &= ~HWCAP_THUMB; #endif + cacheid_init(); cpu_proc_init(); } |