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 __PLAT_OMAP_IOMMU_H 14#define __PLAT_OMAP_IOMMU_H 15 16/* 17 * "L2 table" address mask and size definitions. 18 */ 19#define IOPGD_SHIFT 20 20#define IOPGD_SIZE (1UL << IOPGD_SHIFT) 21#define IOPGD_MASK (~(IOPGD_SIZE - 1)) 22 23/* 24 * "section" address mask and size definitions. 25 */ 26#define IOSECTION_SHIFT 20 27#define IOSECTION_SIZE (1UL << IOSECTION_SHIFT) 28#define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) 29 30/* 31 * "supersection" address mask and size definitions. 32 */ 33#define IOSUPER_SHIFT 24 34#define IOSUPER_SIZE (1UL << IOSUPER_SHIFT) 35#define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) 36 37#define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) 38#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) 39 40/* 41 * "small page" address mask and size definitions. 42 */ 43#define IOPTE_SHIFT 12 44#define IOPTE_SIZE (1UL << IOPTE_SHIFT) 45#define IOPTE_MASK (~(IOPTE_SIZE - 1)) 46 47/* 48 * "large page" address mask and size definitions. 49 */ 50#define IOLARGE_SHIFT 16 51#define IOLARGE_SIZE (1UL << IOLARGE_SHIFT) 52#define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) 53 54#define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) 55#define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) 56 57#define IOPAGE_MASK IOPTE_MASK 58 59/* 60 * some descriptor attributes. 61 */ 62#define IOPGD_TABLE (1 << 0) 63#define IOPGD_SECTION (2 << 0) 64#define IOPGD_SUPER (1 << 18 | 2 << 0) 65 66#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) 67 68#define IOPTE_SMALL (2 << 0) 69#define IOPTE_LARGE (1 << 0) 70 71/* to find an entry in a page-table-directory */ 72#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) 73#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) 74 75#define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) 76#define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) 77 78/* to find an entry in the second-level page table. */ 79#define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) 80#define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) 81 82static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, 83 u32 flags) 84{ 85 memset(e, 0, sizeof(*e)); 86 87 e->da = da; 88 e->pa = pa; 89 e->valid = 1; 90 e->pgsz = flags & MMU_CAM_PGSZ_MASK; 91 e->endian = flags & MMU_RAM_ENDIAN_MASK; 92 e->elsz = flags & MMU_RAM_ELSZ_MASK; 93 e->mixed = flags & MMU_RAM_MIXED_MASK; 94 95 return iopgsz_to_bytes(e->pgsz); 96} 97 98#define to_iommu(dev) \ 99 (struct iommu *)platform_get_drvdata(to_platform_device(dev)) 100 101#endif /* __PLAT_OMAP_IOMMU_H */ 102