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Hiroshi DOYUa9dcad52009-01-26 15:13:40 +02001/*
2 * omap iommu: pagetable definitions
3 *
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -08004 * Copyright (C) 2008-2010 Nokia Corporation
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +02005 *
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
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080016/*
17 * "L2 table" address mask and size definitions.
18 */
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020019#define IOPGD_SHIFT 20
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080020#define IOPGD_SIZE (1UL << IOPGD_SHIFT)
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020021#define IOPGD_MASK (~(IOPGD_SIZE - 1))
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020022
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080023/*
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)
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020035#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
36
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080037#define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT))
38#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020039
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080040/*
41 * "small page" address mask and size definitions.
42 */
43#define IOPTE_SHIFT 12
44#define IOPTE_SIZE (1UL << IOPTE_SHIFT)
45#define IOPTE_MASK (~(IOPTE_SIZE - 1))
46
47/*
48 * "large page" address mask and size definitions.
49 */
50#define IOLARGE_SHIFT 16
51#define IOLARGE_SIZE (1UL << IOLARGE_SHIFT)
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020052#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
53
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080054#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 */
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020062#define IOPGD_TABLE (1 << 0)
63#define IOPGD_SECTION (2 << 0)
64#define IOPGD_SUPER (1 << 18 | 2 << 0)
65
Hiroshi DOYUa1a54452010-05-13 09:45:35 +030066#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
67
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020068#define IOPTE_SMALL (2 << 0)
69#define IOPTE_LARGE (1 << 0)
70
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080071/* to find an entry in a page-table-directory */
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020072#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
73#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
74
Hiroshi DOYU12493352010-05-13 09:46:44 +030075#define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
76#define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020077
Hiroshi DOYU97ec7d52010-02-15 10:03:32 -080078/* to find an entry in the second-level page table. */
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020079#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
Hiroshi DOYU12493352010-05-13 09:46:44 +030080#define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da))
Hiroshi DOYUa9dcad52009-01-26 15:13:40 +020081
82static 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 */