]>
Commit | Line | Data |
---|---|---|
a9dcad5e HD |
1 | /* |
2 | * omap iommu: pagetable definitions | |
3 | * | |
97ec7d58 | 4 | * Copyright (C) 2008-2010 Nokia Corporation |
a9dcad5e HD |
5 | * |
6 | * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
97ec7d58 HD |
13 | /* |
14 | * "L2 table" address mask and size definitions. | |
15 | */ | |
a9dcad5e | 16 | #define IOPGD_SHIFT 20 |
97ec7d58 | 17 | #define IOPGD_SIZE (1UL << IOPGD_SHIFT) |
a9dcad5e | 18 | #define IOPGD_MASK (~(IOPGD_SIZE - 1)) |
a9dcad5e | 19 | |
97ec7d58 HD |
20 | /* |
21 | * "section" address mask and size definitions. | |
22 | */ | |
23 | #define IOSECTION_SHIFT 20 | |
24 | #define IOSECTION_SIZE (1UL << IOSECTION_SHIFT) | |
25 | #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) | |
26 | ||
27 | /* | |
28 | * "supersection" address mask and size definitions. | |
29 | */ | |
30 | #define IOSUPER_SHIFT 24 | |
31 | #define IOSUPER_SIZE (1UL << IOSUPER_SHIFT) | |
a9dcad5e HD |
32 | #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) |
33 | ||
97ec7d58 HD |
34 | #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) |
35 | #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) | |
36 | ||
37 | /* | |
38 | * "small page" address mask and size definitions. | |
39 | */ | |
a9dcad5e | 40 | #define IOPTE_SHIFT 12 |
97ec7d58 | 41 | #define IOPTE_SIZE (1UL << IOPTE_SHIFT) |
a9dcad5e | 42 | #define IOPTE_MASK (~(IOPTE_SIZE - 1)) |
a9dcad5e | 43 | |
97ec7d58 HD |
44 | /* |
45 | * "large page" address mask and size definitions. | |
46 | */ | |
47 | #define IOLARGE_SHIFT 16 | |
48 | #define IOLARGE_SIZE (1UL << IOLARGE_SHIFT) | |
a9dcad5e HD |
49 | #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) |
50 | ||
97ec7d58 HD |
51 | #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) |
52 | #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) | |
53 | ||
54 | #define IOPAGE_MASK IOPTE_MASK | |
55 | ||
f626b52d OBC |
56 | /** |
57 | * omap_iommu_translate() - va to pa translation | |
58 | * @d: omap iommu descriptor | |
59 | * @va: virtual address | |
60 | * @mask: omap iommu descriptor mask | |
61 | * | |
62 | * va to pa translation | |
63 | */ | |
64 | static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask) | |
65 | { | |
66 | return (d & mask) | (va & (~mask)); | |
67 | } | |
68 | ||
97ec7d58 HD |
69 | /* |
70 | * some descriptor attributes. | |
71 | */ | |
a9dcad5e HD |
72 | #define IOPGD_TABLE (1 << 0) |
73 | #define IOPGD_SECTION (2 << 0) | |
74 | #define IOPGD_SUPER (1 << 18 | 2 << 0) | |
75 | ||
a1a54456 | 76 | #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) |
f626b52d OBC |
77 | #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION) |
78 | #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER) | |
a1a54456 | 79 | |
a9dcad5e HD |
80 | #define IOPTE_SMALL (2 << 0) |
81 | #define IOPTE_LARGE (1 << 0) | |
82 | ||
f626b52d OBC |
83 | #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL) |
84 | #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE) | |
85 | ||
97ec7d58 | 86 | /* to find an entry in a page-table-directory */ |
a9dcad5e HD |
87 | #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) |
88 | #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) | |
89 | ||
12493359 HD |
90 | #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) |
91 | #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) | |
a9dcad5e | 92 | |
97ec7d58 | 93 | /* to find an entry in the second-level page table. */ |
a9dcad5e | 94 | #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) |
12493359 | 95 | #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) |
a9dcad5e | 96 | |
a9dcad5e | 97 | #define to_iommu(dev) \ |
b6c2e09f | 98 | ((struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))) |