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author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-03-08 23:21:04 +0300 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-03-08 23:21:04 +0300 |
commit | 988addf82e4c03739375279de73929580a2d4a6a (patch) | |
tree | 989ae1cd4e264bbad80c65f04480486246e7b9f3 /arch/sh/mm/uncached.c | |
parent | 004c1c7096659d352b83047a7593e91d8a30e3c5 (diff) | |
parent | 25cf84cf377c0aae5dbcf937ea89bc7893db5176 (diff) | |
download | linux-988addf82e4c03739375279de73929580a2d4a6a.tar.xz |
Merge branch 'origin' into devel-stable
Conflicts:
arch/arm/mach-mx2/devices.c
arch/arm/mach-mx2/devices.h
sound/soc/pxa/pxa-ssp.c
Diffstat (limited to 'arch/sh/mm/uncached.c')
-rw-r--r-- | arch/sh/mm/uncached.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/sh/mm/uncached.c b/arch/sh/mm/uncached.c new file mode 100644 index 000000000000..cf20a5c5136a --- /dev/null +++ b/arch/sh/mm/uncached.c @@ -0,0 +1,34 @@ +#include <linux/init.h> +#include <asm/sizes.h> +#include <asm/page.h> + +/* + * This is the offset of the uncached section from its cached alias. + * + * Legacy platforms handle trivial transitions between cached and + * uncached segments by making use of the 1:1 mapping relationship in + * 512MB lowmem, others via a special uncached mapping. + * + * Default value only valid in 29 bit mode, in 32bit mode this will be + * updated by the early PMB initialization code. + */ +unsigned long cached_to_uncached = SZ_512M; +unsigned long uncached_size = SZ_512M; +unsigned long uncached_start, uncached_end; + +int virt_addr_uncached(unsigned long kaddr) +{ + return (kaddr >= uncached_start) && (kaddr < uncached_end); +} + +void __init uncached_init(void) +{ + uncached_start = memory_end; + uncached_end = uncached_start + uncached_size; +} + +void __init uncached_resize(unsigned long size) +{ + uncached_size = size; + uncached_end = uncached_start + uncached_size; +} |