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 | */ |
66 | static 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 */ |
101 | |