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| author | Paul Mackerras <paulus@samba.org> | 2006-12-04 07:59:07 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-12-04 07:59:07 +0300 |
| commit | 79acbb3ff2d8095b692e1502b9eb2ccec348de26 (patch) | |
| tree | 6ab773e5a8f9de2cd6443362b21d0d6fffe3b35e /include/asm-powerpc/iommu.h | |
| parent | 19a79859e168640f8e16d7b216d211c1c52b687a (diff) | |
| parent | 2b5f6dcce5bf94b9b119e9ed8d537098ec61c3d2 (diff) | |
| download | linux-79acbb3ff2d8095b692e1502b9eb2ccec348de26.tar.xz | |
Merge branch 'linux-2.6' into for-linus
Diffstat (limited to 'include/asm-powerpc/iommu.h')
| -rw-r--r-- | include/asm-powerpc/iommu.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h index 264ed6242771..19e6f7e0a607 100644 --- a/include/asm-powerpc/iommu.h +++ b/include/asm-powerpc/iommu.h @@ -22,17 +22,35 @@ #define _ASM_IOMMU_H #ifdef __KERNEL__ -#include <asm/types.h> +#include <linux/compiler.h> #include <linux/spinlock.h> #include <linux/device.h> #include <linux/dma-mapping.h> +#include <asm/types.h> +#include <asm/bitops.h> + +#define IOMMU_PAGE_SHIFT 12 +#define IOMMU_PAGE_SIZE (ASM_CONST(1) << IOMMU_PAGE_SHIFT) +#define IOMMU_PAGE_MASK (~((1 << IOMMU_PAGE_SHIFT) - 1)) +#define IOMMU_PAGE_ALIGN(addr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE) + +#ifndef __ASSEMBLY__ + +/* Pure 2^n version of get_order */ +static __inline__ __attribute_const__ int get_iommu_order(unsigned long size) +{ + return __ilog2((size - 1) >> IOMMU_PAGE_SHIFT) + 1; +} + +#endif /* __ASSEMBLY__ */ + /* * IOMAP_MAX_ORDER defines the largest contiguous block * of dma space we can get. IOMAP_MAX_ORDER = 13 * allows up to 2**12 pages (4096 * 4096) = 16 MB */ -#define IOMAP_MAX_ORDER 13 +#define IOMAP_MAX_ORDER 13 struct iommu_table { unsigned long it_busno; /* Bus number this table belongs to */ |