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authorRussell King <rmk+kernel@arm.linux.org.uk>2012-01-18 15:32:49 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-01-23 10:24:11 +0000
commit94e5a85b3be0ce109d26aa6812b2a02c518a0e4b (patch)
treefb809876ee6b193489bbca6767c04df346466f1c /arch/arm/mm/mmu.c
parent45cd5290bfd358e9885c0bf47a8c46671a92f716 (diff)
ARM: earlier initialization of vectors page
Initialize the contents of the vectors page immediately after we allocate the page, but before we map it. This avoids any possible aliases with other mappings which may need to be flushed after the page has been mapped irrespective of the cache type. We follow this later with a flush_cache_all() after all static memory mappings have been initialized, which ensures that this is safe from any cache effects. Tested-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/mmu.c')
-rw-r--r--arch/arm/mm/mmu.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 94c5a0c94f5..c1263adc2a2 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -997,11 +997,14 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
{
struct map_desc map;
unsigned long addr;
+ void *vectors;
/*
* Allocate the vector page early.
*/
- vectors_page = early_alloc(PAGE_SIZE);
+ vectors = early_alloc(PAGE_SIZE);
+
+ early_trap_init(vectors);
for (addr = VMALLOC_START; addr; addr += PMD_SIZE)
pmd_clear(pmd_off_k(addr));
@@ -1041,7 +1044,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
* location (0xffff0000). If we aren't using high-vectors, also
* create a mapping at the low-vectors virtual address.
*/
- map.pfn = __phys_to_pfn(virt_to_phys(vectors_page));
+ map.pfn = __phys_to_pfn(virt_to_phys(vectors));
map.virtual = 0xffff0000;
map.length = PAGE_SIZE;
map.type = MT_HIGH_VECTORS;