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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * omap iommu: pagetable definitions
4 *
5 * Copyright (C) 2008-2010 Nokia Corporation
6 *
7 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
8 */
9
10#ifndef _OMAP_IOPGTABLE_H
11#define _OMAP_IOPGTABLE_H
12
13#include <linux/bitops.h>
14
15/*
16 * "L2 table" address mask and size definitions.
17 */
18#define IOPGD_SHIFT 20
19#define IOPGD_SIZE BIT(IOPGD_SHIFT)
20#define IOPGD_MASK (~(IOPGD_SIZE - 1))
21
22/*
23 * "section" address mask and size definitions.
24 */
25#define IOSECTION_SHIFT 20
26#define IOSECTION_SIZE BIT(IOSECTION_SHIFT)
27#define IOSECTION_MASK (~(IOSECTION_SIZE - 1))
28
29/*
30 * "supersection" address mask and size definitions.
31 */
32#define IOSUPER_SHIFT 24
33#define IOSUPER_SIZE BIT(IOSUPER_SHIFT)
34#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
35
36#define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT))
37#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
38
39/*
40 * "small page" address mask and size definitions.
41 */
42#define IOPTE_SHIFT 12
43#define IOPTE_SIZE BIT(IOPTE_SHIFT)
44#define IOPTE_MASK (~(IOPTE_SIZE - 1))
45
46/*
47 * "large page" address mask and size definitions.
48 */
49#define IOLARGE_SHIFT 16
50#define IOLARGE_SIZE BIT(IOLARGE_SHIFT)
51#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
52
53#define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT))
54#define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32))
55
56#define IOPAGE_MASK IOPTE_MASK
57
58/**
59 * omap_iommu_translate() - va to pa translation
60 * @d: omap iommu descriptor
61 * @va: virtual address
62 * @mask: omap iommu descriptor mask
63 *
64 * va to pa translation
65 */
66static inline phys_addr_t omap_iommu_translate(unsigned long d, dma_addr_t va,
67 dma_addr_t mask)
68{
69 return (d & mask) | (va & (~mask));
70}
71
72/*
73 * some descriptor attributes.
74 */
75#define IOPGD_TABLE (1)
76#define IOPGD_SECTION (2)
77#define IOPGD_SUPER (BIT(18) | IOPGD_SECTION)
78
79#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
80#define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION)
81#define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER)
82
83#define IOPTE_SMALL (2)
84#define IOPTE_LARGE (1)
85
86#define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
87#define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
88
89/* to find an entry in a page-table-directory */
90#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
91#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
92
93#define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
94#define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
95
96/* to find an entry in the second-level page table. */
97#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
98#define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da))
99
100#endif /* _OMAP_IOPGTABLE_H */
1/*
2 * omap iommu: pagetable definitions
3 *
4 * Copyright (C) 2008-2010 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 _OMAP_IOPGTABLE_H
14#define _OMAP_IOPGTABLE_H
15
16#include <linux/bitops.h>
17
18/*
19 * "L2 table" address mask and size definitions.
20 */
21#define IOPGD_SHIFT 20
22#define IOPGD_SIZE BIT(IOPGD_SHIFT)
23#define IOPGD_MASK (~(IOPGD_SIZE - 1))
24
25/*
26 * "section" address mask and size definitions.
27 */
28#define IOSECTION_SHIFT 20
29#define IOSECTION_SIZE BIT(IOSECTION_SHIFT)
30#define IOSECTION_MASK (~(IOSECTION_SIZE - 1))
31
32/*
33 * "supersection" address mask and size definitions.
34 */
35#define IOSUPER_SHIFT 24
36#define IOSUPER_SIZE BIT(IOSUPER_SHIFT)
37#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
38
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 */
45#define IOPTE_SHIFT 12
46#define IOPTE_SIZE BIT(IOPTE_SHIFT)
47#define IOPTE_MASK (~(IOPTE_SIZE - 1))
48
49/*
50 * "large page" address mask and size definitions.
51 */
52#define IOLARGE_SHIFT 16
53#define IOLARGE_SIZE BIT(IOLARGE_SHIFT)
54#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
55
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
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 */
69static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
70{
71 return (d & mask) | (va & (~mask));
72}
73
74/*
75 * some descriptor attributes.
76 */
77#define IOPGD_TABLE (1)
78#define IOPGD_SECTION (2)
79#define IOPGD_SUPER (BIT(18) | IOPGD_SECTION)
80
81#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
82#define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION)
83#define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER)
84
85#define IOPTE_SMALL (2)
86#define IOPTE_LARGE (1)
87
88#define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
89#define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
90
91/* to find an entry in a page-table-directory */
92#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
93#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
94
95#define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
96#define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
97
98/* to find an entry in the second-level page table. */
99#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
100#define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da))
101
102#endif /* _OMAP_IOPGTABLE_H */