diff options
Diffstat (limited to 'arch/arm/mm/mmu.c')
| -rw-r--r-- | arch/arm/mm/mmu.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 3b5e47dc0c97..e5d61ee3d4a1 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -114,6 +114,10 @@ static void __init early_cachepolicy(char **p) } if (i == ARRAY_SIZE(cache_policies)) printk(KERN_ERR "ERROR: unknown or unsupported cache policy\n"); + if (cpu_architecture() >= CPU_ARCH_ARMv6) { + printk(KERN_WARNING "Only cachepolicy=writeback supported on ARMv6 and later\n"); + cachepolicy = CPOLICY_WRITEBACK; + } flush_cache_all(); set_cr(cr_alignment); } @@ -252,13 +256,15 @@ static void __init build_mem_type_table(void) int cpu_arch = cpu_architecture(); int i; + if (cpu_arch < CPU_ARCH_ARMv6) { #if defined(CONFIG_CPU_DCACHE_DISABLE) - if (cachepolicy > CPOLICY_BUFFERED) - cachepolicy = CPOLICY_BUFFERED; + if (cachepolicy > CPOLICY_BUFFERED) + cachepolicy = CPOLICY_BUFFERED; #elif defined(CONFIG_CPU_DCACHE_WRITETHROUGH) - if (cachepolicy > CPOLICY_WRITETHROUGH) - cachepolicy = CPOLICY_WRITETHROUGH; + if (cachepolicy > CPOLICY_WRITETHROUGH) + cachepolicy = CPOLICY_WRITETHROUGH; #endif + } if (cpu_arch < CPU_ARCH_ARMv5) { if (cachepolicy >= CPOLICY_WRITEALLOC) cachepolicy = CPOLICY_WRITEBACK; |