diff options
Diffstat (limited to 'include/asm-x86_64')
| -rw-r--r-- | include/asm-x86_64/dma.h | 11 | ||||
| -rw-r--r-- | include/asm-x86_64/proto.h | 2 |
2 files changed, 11 insertions, 2 deletions
diff --git a/include/asm-x86_64/dma.h b/include/asm-x86_64/dma.h index 16fa3a064d0..6f2a817b6a7 100644 --- a/include/asm-x86_64/dma.h +++ b/include/asm-x86_64/dma.h @@ -72,8 +72,15 @@ #define MAX_DMA_CHANNELS 8 -/* The maximum address that we can perform a DMA transfer to on this platform */ -#define MAX_DMA_ADDRESS (PAGE_OFFSET+0x1000000) + +/* 16MB ISA DMA zone */ +#define MAX_DMA_PFN ((16*1024*1024) >> PAGE_SHIFT) + +/* 4GB broken PCI/AGP hardware bus master zone */ +#define MAX_DMA32_PFN ((4UL*1024*1024*1024) >> PAGE_SHIFT) + +/* Compat define for old dma zone */ +#define MAX_DMA_ADDRESS ((unsigned long)__va(MAX_DMA_PFN << PAGE_SHIFT)) /* 8237 DMA controllers */ #define IO_DMA1_BASE 0x00 /* 8 bit slave DMA, channels 0..3 */ diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h index dbb37b0adb4..c251152a065 100644 --- a/include/asm-x86_64/proto.h +++ b/include/asm-x86_64/proto.h @@ -22,6 +22,8 @@ extern void mtrr_bp_init(void); #define mtrr_bp_init() do {} while (0) #endif extern void init_memory_mapping(unsigned long start, unsigned long end); +extern void size_zones(unsigned long *z, unsigned long *h, + unsigned long start_pfn, unsigned long end_pfn); extern void system_call(void); extern int kernel_syscall(void); |