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