diff options
Diffstat (limited to 'arch/arm/mm/init.c')
| -rw-r--r-- | arch/arm/mm/init.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 17d6cd0c..4a8a01e 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -28,6 +28,7 @@ #include <asm/sizes.h> #include <asm/tlb.h> #include <asm/fixmap.h> +#include <asm/memory.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> @@ -212,6 +213,14 @@ static void __init arm_bootmem_init(unsigned long start_pfn, } #ifdef CONFIG_ZONE_DMA + +#ifdef ARM_DMA_ZONE_SIZE +unsigned long arm_dma_zone_size = ARM_DMA_ZONE_SIZE; +#else +unsigned long arm_dma_zone_size __read_mostly; +#endif +EXPORT_SYMBOL(arm_dma_zone_size); + /* * The DMA mask corresponding to the maximum bus address allocatable * using GFP_DMA. The default here places no restriction on DMA @@ -275,19 +284,17 @@ 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 - +#ifdef CONFIG_ZONE_DMA /* * Adjust the sizes according to any special requirements for * this machine type. */ - arm_adjust_dma_zone(zone_size, zhole_size, - ARM_DMA_ZONE_SIZE >> PAGE_SHIFT); - - arm_dma_limit = PHYS_OFFSET + ARM_DMA_ZONE_SIZE - 1; + if (arm_dma_zone_size) { + arm_adjust_dma_zone(zone_size, zhole_size, + arm_dma_zone_size >> PAGE_SHIFT); + arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1; + } else + arm_dma_limit = 0xffffffff; #endif free_area_init_node(0, zone_size, min, zhole_size); |