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Diffstat (limited to 'arch/sh/mm/cache.c')
-rw-r--r--arch/sh/mm/cache.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index 35c37b7f717a..a2dc7f9ecc51 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -128,7 +128,7 @@ void __update_cache(struct vm_area_struct *vma,
return;
page = pfn_to_page(pfn);
- if (pfn_valid(pfn) && page_mapping(page)) {
+ if (pfn_valid(pfn)) {
int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
if (dirty) {
unsigned long addr = (unsigned long)page_address(page);
@@ -265,6 +265,8 @@ static void __init emit_cache_params(void)
void __init cpu_cache_init(void)
{
+ unsigned int cache_disabled = !(__raw_readl(CCR) & CCR_CACHE_ENABLE);
+
compute_alias(&boot_cpu_data.icache);
compute_alias(&boot_cpu_data.dcache);
compute_alias(&boot_cpu_data.scache);
@@ -273,6 +275,13 @@ void __init cpu_cache_init(void)
__flush_purge_region = noop__flush_region;
__flush_invalidate_region = noop__flush_region;
+ /*
+ * No flushing is necessary in the disabled cache case so we can
+ * just keep the noop functions in local_flush_..() and __flush_..()
+ */
+ if (unlikely(cache_disabled))
+ goto skip;
+
if (boot_cpu_data.family == CPU_FAMILY_SH2) {
extern void __weak sh2_cache_init(void);
@@ -312,5 +321,6 @@ void __init cpu_cache_init(void)
sh5_cache_init();
}
+skip:
emit_cache_params();
}