diff options
Diffstat (limited to 'arch/arm/mm/init.c')
| -rw-r--r-- | arch/arm/mm/init.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 8f5813bbffb5..c21d06c7dd7e 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -20,6 +20,7 @@ #include <linux/highmem.h> #include <linux/gfp.h> #include <linux/memblock.h> +#include <linux/dma-contiguous.h> #include <asm/mach-types.h> #include <asm/memblock.h> @@ -226,6 +227,17 @@ static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole, } #endif +void __init setup_dma_zone(struct machine_desc *mdesc) +{ +#ifdef CONFIG_ZONE_DMA + if (mdesc->dma_zone_size) { + arm_dma_zone_size = mdesc->dma_zone_size; + arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1; + } else + arm_dma_limit = 0xffffffff; +#endif +} + static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, unsigned long max_high) { @@ -273,12 +285,9 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low, * Adjust the sizes according to any special requirements for * this machine type. */ - if (arm_dma_zone_size) { + 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); @@ -364,6 +373,12 @@ void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) if (mdesc->reserve) mdesc->reserve(); + /* + * reserve memory for DMA contigouos allocations, + * must come from DMA area inside low memory + */ + dma_contiguous_reserve(min(arm_dma_limit, arm_lowmem_limit)); + arm_memblock_steal_permitted = false; memblock_allow_resize(); memblock_dump_all(); |