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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/* 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(u32 d, u32 va, u32 mask)
67{
68 return (d & mask) | (va & (~mask));
69}
70
71/*
72 * some descriptor attributes.
73 */
74#define IOPGD_TABLE (1)
75#define IOPGD_SECTION (2)
76#define IOPGD_SUPER (BIT(18) | IOPGD_SECTION)
77
78#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
79#define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION)
80#define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER)
81
82#define IOPTE_SMALL (2)
83#define IOPTE_LARGE (1)
84
85#define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
86#define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
87
88/* to find an entry in a page-table-directory */
89#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
90#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
91
92#define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
93#define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
94
95/* to find an entry in the second-level page table. */
96#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1))
97#define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da))
98
99#endif /* _OMAP_IOPGTABLE_H */