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1 | /* |
2 | * omap iommu: pagetable definitions | |
3 | * | |
4 | * Copyright (C) 2008-2009 Nokia Corporation | |
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 | ||
16 | #define IOPGD_SHIFT 20 | |
17 | #define IOPGD_SIZE (1 << IOPGD_SHIFT) | |
18 | #define IOPGD_MASK (~(IOPGD_SIZE - 1)) | |
19 | #define IOSECTION_MASK IOPGD_MASK | |
20 | #define PTRS_PER_IOPGD (1 << (32 - IOPGD_SHIFT)) | |
21 | #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) | |
22 | ||
23 | #define IOSUPER_SIZE (IOPGD_SIZE << 4) | |
24 | #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) | |
25 | ||
26 | #define IOPTE_SHIFT 12 | |
27 | #define IOPTE_SIZE (1 << IOPTE_SHIFT) | |
28 | #define IOPTE_MASK (~(IOPTE_SIZE - 1)) | |
29 | #define IOPAGE_MASK IOPTE_MASK | |
30 | #define PTRS_PER_IOPTE (1 << (IOPGD_SHIFT - IOPTE_SHIFT)) | |
31 | #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) | |
32 | ||
33 | #define IOLARGE_SIZE (IOPTE_SIZE << 4) | |
34 | #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) | |
35 | ||
36 | #define IOPGD_TABLE (1 << 0) | |
37 | #define IOPGD_SECTION (2 << 0) | |
38 | #define IOPGD_SUPER (1 << 18 | 2 << 0) | |
39 | ||
40 | #define IOPTE_SMALL (2 << 0) | |
41 | #define IOPTE_LARGE (1 << 0) | |
42 | ||
43 | #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) | |
44 | #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) | |
45 | ||
46 | #define iopte_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) | |
47 | #define iopte_vaddr(iopgd) ((u32 *)phys_to_virt(iopte_paddr(iopgd))) | |
48 | ||
49 | #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) | |
50 | #define iopte_offset(iopgd, da) (iopte_vaddr(iopgd) + iopte_index(da)) | |
51 | ||
52 | static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, | |
53 | u32 flags) | |
54 | { | |
55 | memset(e, 0, sizeof(*e)); | |
56 | ||
57 | e->da = da; | |
58 | e->pa = pa; | |
59 | e->valid = 1; | |
60 | /* FIXME: add OMAP1 support */ | |
61 | e->pgsz = flags & MMU_CAM_PGSZ_MASK; | |
62 | e->endian = flags & MMU_RAM_ENDIAN_MASK; | |
63 | e->elsz = flags & MMU_RAM_ELSZ_MASK; | |
64 | e->mixed = flags & MMU_RAM_MIXED_MASK; | |
65 | ||
66 | return iopgsz_to_bytes(e->pgsz); | |
67 | } | |
68 | ||
69 | #define to_iommu(dev) \ | |
70 | (struct iommu *)platform_get_drvdata(to_platform_device(dev)) | |
71 | ||
72 | #endif /* __PLAT_OMAP_IOMMU_H */ |