diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-05-11 18:39:00 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-05-12 11:36:53 +0400 |
| commit | be20902ba67de70b38c995903321f4152dee57b7 (patch) | |
| tree | 86f27d4d90b7408d421ce246527431e58a836bf3 /arch/arm/mm | |
| parent | 2fb3ec5c9503ba8874e24170de2b40e8f1a58370 (diff) | |
| download | linux-be20902ba67de70b38c995903321f4152dee57b7.tar.xz | |
ARM: use ARM_DMA_ZONE_SIZE to adjust the zone sizes
Rather than each platform providing its own function to adjust the
zone sizes, use the new ARM_DMA_ZONE_SIZE definition to perform this
adjustment. This ensures that the actual DMA zone size and the
ISA_DMA_THRESHOLD/MAX_DMA_ADDRESS definitions are consistent with
each other, and moves this complexity out of the platform code.
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/init.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index e5f6fc428348..49eaad9136a7 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -201,6 +201,20 @@ static void __init arm_bootmem_init(unsigned long start_pfn, } } +#ifdef CONFIG_ZONE_DMA +static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole, + unsigned long dma_size) +{ + if (size[0] <= dma_size) + return; + + size[ZONE_NORMAL] = size[0] - dma_size; + size[ZONE_DMA] = dma_size; + hole[ZONE_NORMAL] = hole[0]; + hole[ZONE_DMA] = 0; +} +#endif + static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, unsigned long max_high) { @@ -243,11 +257,18 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, #endif } +#ifdef ARM_DMA_ZONE_SIZE +#ifndef CONFIG_ZONE_DMA +#error ARM_DMA_ZONE_SIZE set but no DMA zone to limit allocations +#endif + /* * Adjust the sizes according to any special requirements for * this machine type. */ - arch_adjust_zones(zone_size, zhole_size); + arm_adjust_dma_zone(zone_size, zhole_size, + ARM_DMA_ZONE_SIZE >> PAGE_SHIFT); +#endif free_area_init_node(0, zone_size, min, zhole_size); } |