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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 | ||
13 | #ifndef __PLAT_OMAP_IOMMU_H | |
14 | #define __PLAT_OMAP_IOMMU_H | |
15 | ||
97ec7d58 HD |
16 | /* |
17 | * "L2 table" address mask and size definitions. | |
18 | */ | |
a9dcad5e | 19 | #define IOPGD_SHIFT 20 |
97ec7d58 | 20 | #define IOPGD_SIZE (1UL << IOPGD_SHIFT) |
a9dcad5e | 21 | #define IOPGD_MASK (~(IOPGD_SIZE - 1)) |
a9dcad5e | 22 | |
97ec7d58 HD |
23 | /* |
24 | * "section" address mask and size definitions. | |
25 | */ | |
26 | #define IOSECTION_SHIFT 20 | |
27 | #define IOSECTION_SIZE (1UL << IOSECTION_SHIFT) | |
28 | #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) | |
29 | ||
30 | /* | |
31 | * "supersection" address mask and size definitions. | |
32 | */ | |
33 | #define IOSUPER_SHIFT 24 | |
34 | #define IOSUPER_SIZE (1UL << IOSUPER_SHIFT) | |
a9dcad5e HD |
35 | #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) |
36 | ||
97ec7d58 HD |
37 | #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) |
38 | #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) | |
39 | ||
40 | /* | |
41 | * "small page" address mask and size definitions. | |
42 | */ | |
a9dcad5e | 43 | #define IOPTE_SHIFT 12 |
97ec7d58 | 44 | #define IOPTE_SIZE (1UL << IOPTE_SHIFT) |
a9dcad5e | 45 | #define IOPTE_MASK (~(IOPTE_SIZE - 1)) |
a9dcad5e | 46 | |
97ec7d58 HD |
47 | /* |
48 | * "large page" address mask and size definitions. | |
49 | */ | |
50 | #define IOLARGE_SHIFT 16 | |
51 | #define IOLARGE_SIZE (1UL << IOLARGE_SHIFT) | |
a9dcad5e HD |
52 | #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) |
53 | ||
97ec7d58 HD |
54 | #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) |
55 | #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) | |
56 | ||
57 | #define IOPAGE_MASK IOPTE_MASK | |
58 | ||
59 | /* | |
60 | * some descriptor attributes. | |
61 | */ | |
a9dcad5e HD |
62 | #define IOPGD_TABLE (1 << 0) |
63 | #define IOPGD_SECTION (2 << 0) | |
64 | #define IOPGD_SUPER (1 << 18 | 2 << 0) | |
65 | ||
a1a54456 HD |
66 | #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) |
67 | ||
a9dcad5e HD |
68 | #define IOPTE_SMALL (2 << 0) |
69 | #define IOPTE_LARGE (1 << 0) | |
70 | ||
97ec7d58 | 71 | /* to find an entry in a page-table-directory */ |
a9dcad5e HD |
72 | #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) |
73 | #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) | |
74 | ||
12493359 HD |
75 | #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) |
76 | #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) | |
a9dcad5e | 77 | |
97ec7d58 | 78 | /* to find an entry in the second-level page table. */ |
a9dcad5e | 79 | #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) |
12493359 | 80 | #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) |
a9dcad5e HD |
81 | |
82 | static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, | |
83 | u32 flags) | |
84 | { | |
85 | memset(e, 0, sizeof(*e)); | |
86 | ||
87 | e->da = da; | |
88 | e->pa = pa; | |
89 | e->valid = 1; | |
90 | /* FIXME: add OMAP1 support */ | |
91 | e->pgsz = flags & MMU_CAM_PGSZ_MASK; | |
92 | e->endian = flags & MMU_RAM_ENDIAN_MASK; | |
93 | e->elsz = flags & MMU_RAM_ELSZ_MASK; | |
94 | e->mixed = flags & MMU_RAM_MIXED_MASK; | |
95 | ||
96 | return iopgsz_to_bytes(e->pgsz); | |
97 | } | |
98 | ||
99 | #define to_iommu(dev) \ | |
100 | (struct iommu *)platform_get_drvdata(to_platform_device(dev)) | |
101 | ||
102 | #endif /* __PLAT_OMAP_IOMMU_H */ |