1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * omap iommu: pagetable definitions
5 * Copyright (C) 2008-2010 Nokia Corporation
7 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
10 #ifndef _OMAP_IOPGTABLE_H
11 #define _OMAP_IOPGTABLE_H
13 #include <linux/bitops.h>
16 * "L2 table" address mask and size definitions.
18 #define IOPGD_SHIFT 20
19 #define IOPGD_SIZE BIT(IOPGD_SHIFT)
20 #define IOPGD_MASK (~(IOPGD_SIZE - 1))
23 * "section" address mask and size definitions.
25 #define IOSECTION_SHIFT 20
26 #define IOSECTION_SIZE BIT(IOSECTION_SHIFT)
27 #define IOSECTION_MASK (~(IOSECTION_SIZE - 1))
30 * "supersection" address mask and size definitions.
32 #define IOSUPER_SHIFT 24
33 #define IOSUPER_SIZE BIT(IOSUPER_SHIFT)
34 #define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
36 #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT))
37 #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32))
40 * "small page" address mask and size definitions.
42 #define IOPTE_SHIFT 12
43 #define IOPTE_SIZE BIT(IOPTE_SHIFT)
44 #define IOPTE_MASK (~(IOPTE_SIZE - 1))
47 * "large page" address mask and size definitions.
49 #define IOLARGE_SHIFT 16
50 #define IOLARGE_SIZE BIT(IOLARGE_SHIFT)
51 #define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
53 #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT))
54 #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32))
56 #define IOPAGE_MASK IOPTE_MASK
59 * omap_iommu_translate() - va to pa translation
60 * @d: omap iommu descriptor
61 * @va: virtual address
62 * @mask: omap iommu descriptor mask
64 * va to pa translation
66 static inline phys_addr_t omap_iommu_translate(unsigned long d, dma_addr_t va,
69 return (d & mask) | (va & (~mask));
73 * some descriptor attributes.
75 #define IOPGD_TABLE (1)
76 #define IOPGD_SECTION (2)
77 #define IOPGD_SUPER (BIT(18) | IOPGD_SECTION)
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)
83 #define IOPTE_SMALL (2)
84 #define IOPTE_LARGE (1)
86 #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
87 #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
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))
93 #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1))
94 #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd)))
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))
100 #endif /* _OMAP_IOPGTABLE_H */