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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-07-08 21:26:59 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-07-12 11:08:12 +0100 |
| commit | 022ae537b23cb14a391565e9ad9e9945f4b17138 (patch) | |
| tree | e167c03036fcc09d7131fa364efa70c9e3d5b92a /arch/arm/mm/init.c | |
| parent | 3973c337759cd201773a0ecc7b6f39f1ea2a6287 (diff) | |
| download | op-kernel-dev-022ae537b23cb14a391565e9ad9e9945f4b17138.zip op-kernel-dev-022ae537b23cb14a391565e9ad9e9945f4b17138.tar.gz | |
ARM: dma: replace ISA_DMA_THRESHOLD with a variable
ISA_DMA_THRESHOLD has been unused by non-arch code, so lets now get
rid of it from ARM by replacing it with arm_dma_zone_mask. Move
dma_supported() and dma_set_mask() out of line, and have
dma_supported() check this new variable instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/init.c')
| -rw-r--r-- | arch/arm/mm/init.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index c19571c..17d6cd0c 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -212,6 +212,14 @@ static void __init arm_bootmem_init(unsigned long start_pfn, } #ifdef CONFIG_ZONE_DMA +/* + * The DMA mask corresponding to the maximum bus address allocatable + * using GFP_DMA. The default here places no restriction on DMA + * allocations. This must be the smallest DMA mask in the system, + * so a successful GFP_DMA allocation will always satisfy this. + */ +u32 arm_dma_limit; + static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole, unsigned long dma_size) { @@ -278,6 +286,8 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, */ arm_adjust_dma_zone(zone_size, zhole_size, ARM_DMA_ZONE_SIZE >> PAGE_SHIFT); + + arm_dma_limit = PHYS_OFFSET + ARM_DMA_ZONE_SIZE - 1; #endif free_area_init_node(0, zone_size, min, zhole_size); |
