Commit | Line | Data |
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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 | ||
ad8e29a0 SA |
13 | #ifndef _OMAP_IOPGTABLE_H |
14 | #define _OMAP_IOPGTABLE_H | |
15 | ||
5ff98fa6 SA |
16 | #include <linux/bitops.h> |
17 | ||
97ec7d58 HD |
18 | /* |
19 | * "L2 table" address mask and size definitions. | |
20 | */ | |
a9dcad5e | 21 | #define IOPGD_SHIFT 20 |
5ff98fa6 | 22 | #define IOPGD_SIZE BIT(IOPGD_SHIFT) |
a9dcad5e | 23 | #define IOPGD_MASK (~(IOPGD_SIZE - 1)) |
a9dcad5e | 24 | |
97ec7d58 HD |
25 | /* |
26 | * "section" address mask and size definitions. | |
27 | */ | |
28 | #define IOSECTION_SHIFT 20 | |
5ff98fa6 | 29 | #define IOSECTION_SIZE BIT(IOSECTION_SHIFT) |
97ec7d58 HD |
30 | #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) |
31 | ||
32 | /* | |
33 | * "supersection" address mask and size definitions. | |
34 | */ | |
35 | #define IOSUPER_SHIFT 24 | |
5ff98fa6 | 36 | #define IOSUPER_SIZE BIT(IOSUPER_SHIFT) |
a9dcad5e HD |
37 | #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) |
38 | ||
97ec7d58 HD |
39 | #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) |
40 | #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) | |
41 | ||
42 | /* | |
43 | * "small page" address mask and size definitions. | |
44 | */ | |
a9dcad5e | 45 | #define IOPTE_SHIFT 12 |
5ff98fa6 | 46 | #define IOPTE_SIZE BIT(IOPTE_SHIFT) |
a9dcad5e | 47 | #define IOPTE_MASK (~(IOPTE_SIZE - 1)) |
a9dcad5e | 48 | |
97ec7d58 HD |
49 | /* |
50 | * "large page" address mask and size definitions. | |
51 | */ | |
52 | #define IOLARGE_SHIFT 16 | |
5ff98fa6 | 53 | #define IOLARGE_SIZE BIT(IOLARGE_SHIFT) |
a9dcad5e HD |
54 | #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) |
55 | ||
97ec7d58 HD |
56 | #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) |
57 | #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) | |
58 | ||
59 | #define IOPAGE_MASK IOPTE_MASK | |
60 | ||
f626b52d OBC |
61 | /** |
62 | * omap_iommu_translate() - va to pa translation | |
63 | * @d: omap iommu descriptor | |
64 | * @va: virtual address | |
65 | * @mask: omap iommu descriptor mask | |
66 | * | |
67 | * va to pa translation | |
68 | */ | |
69 | static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask) | |
70 | { | |
71 | return (d & mask) | (va & (~mask)); | |
72 | } | |
73 | ||
97ec7d58 HD |
74 | /* |
75 | * some descriptor attributes. | |
76 | */ | |
5ff98fa6 SA |
77 | #define IOPGD_TABLE (1) |
78 | #define IOPGD_SECTION (2) | |
79 | #define IOPGD_SUPER (BIT(18) | IOPGD_SECTION) | |
a9dcad5e | 80 | |
a1a54456 | 81 | #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) |
f626b52d OBC |
82 | #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION) |
83 | #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER) | |
a1a54456 | 84 | |
5ff98fa6 SA |
85 | #define IOPTE_SMALL (2) |
86 | #define IOPTE_LARGE (1) | |
a9dcad5e | 87 | |
f626b52d OBC |
88 | #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL) |
89 | #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE) | |
90 | ||
97ec7d58 | 91 | /* to find an entry in a page-table-directory */ |
a9dcad5e HD |
92 | #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) |
93 | #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) | |
94 | ||
12493359 HD |
95 | #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) |
96 | #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) | |
a9dcad5e | 97 | |
97ec7d58 | 98 | /* to find an entry in the second-level page table. */ |
a9dcad5e | 99 | #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) |
12493359 | 100 | #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) |
ad8e29a0 SA |
101 | |
102 | #endif /* _OMAP_IOPGTABLE_H */ |