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-rw-r--r--include/asm-powerpc/iommu.h22
1 files changed, 20 insertions, 2 deletions
diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index a5e98641a2ae..39fad685ffab 100644
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -22,17 +22,35 @@
22#define _ASM_IOMMU_H 22#define _ASM_IOMMU_H
23#ifdef __KERNEL__ 23#ifdef __KERNEL__
24 24
25#include <asm/types.h> 25#include <linux/compiler.h>
26#include <linux/spinlock.h> 26#include <linux/spinlock.h>
27#include <linux/device.h> 27#include <linux/device.h>
28#include <linux/dma-mapping.h> 28#include <linux/dma-mapping.h>
29#include <asm/types.h>
30#include <asm/bitops.h>
31
32#define IOMMU_PAGE_SHIFT 12
33#define IOMMU_PAGE_SIZE (ASM_CONST(1) << IOMMU_PAGE_SHIFT)
34#define IOMMU_PAGE_MASK (~((1 << IOMMU_PAGE_SHIFT) - 1))
35#define IOMMU_PAGE_ALIGN(addr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE)
36
37#ifndef __ASSEMBLY__
38
39/* Pure 2^n version of get_order */
40static __inline__ __attribute_const__ int get_iommu_order(unsigned long size)
41{
42 return __ilog2((size - 1) >> IOMMU_PAGE_SHIFT) + 1;
43}
44
45#endif /* __ASSEMBLY__ */
46
29 47
30/* 48/*
31 * IOMAP_MAX_ORDER defines the largest contiguous block 49 * IOMAP_MAX_ORDER defines the largest contiguous block
32 * of dma space we can get. IOMAP_MAX_ORDER = 13 50 * of dma space we can get. IOMAP_MAX_ORDER = 13
33 * allows up to 2**12 pages (4096 * 4096) = 16 MB 51 * allows up to 2**12 pages (4096 * 4096) = 16 MB
34 */ 52 */
35#define IOMAP_MAX_ORDER 13 53#define IOMAP_MAX_ORDER 13
36 54
37struct iommu_table { 55struct iommu_table {
38 unsigned long it_busno; /* Bus number this table belongs to */ 56 unsigned long it_busno; /* Bus number this table belongs to */