12f7702afSIdo Yariv /* 22f7702afSIdo Yariv * omap iommu: pagetable definitions 32f7702afSIdo Yariv * 42f7702afSIdo Yariv * Copyright (C) 2008-2010 Nokia Corporation 52f7702afSIdo Yariv * 62f7702afSIdo Yariv * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> 72f7702afSIdo Yariv * 82f7702afSIdo Yariv * This program is free software; you can redistribute it and/or modify 92f7702afSIdo Yariv * it under the terms of the GNU General Public License version 2 as 102f7702afSIdo Yariv * published by the Free Software Foundation. 112f7702afSIdo Yariv */ 122f7702afSIdo Yariv 132f7702afSIdo Yariv #ifndef __PLAT_OMAP_IOMMU_H 142f7702afSIdo Yariv #define __PLAT_OMAP_IOMMU_H 152f7702afSIdo Yariv 162f7702afSIdo Yariv /* 172f7702afSIdo Yariv * "L2 table" address mask and size definitions. 182f7702afSIdo Yariv */ 192f7702afSIdo Yariv #define IOPGD_SHIFT 20 202f7702afSIdo Yariv #define IOPGD_SIZE (1UL << IOPGD_SHIFT) 212f7702afSIdo Yariv #define IOPGD_MASK (~(IOPGD_SIZE - 1)) 222f7702afSIdo Yariv 232f7702afSIdo Yariv /* 242f7702afSIdo Yariv * "section" address mask and size definitions. 252f7702afSIdo Yariv */ 262f7702afSIdo Yariv #define IOSECTION_SHIFT 20 272f7702afSIdo Yariv #define IOSECTION_SIZE (1UL << IOSECTION_SHIFT) 282f7702afSIdo Yariv #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) 292f7702afSIdo Yariv 302f7702afSIdo Yariv /* 312f7702afSIdo Yariv * "supersection" address mask and size definitions. 322f7702afSIdo Yariv */ 332f7702afSIdo Yariv #define IOSUPER_SHIFT 24 342f7702afSIdo Yariv #define IOSUPER_SIZE (1UL << IOSUPER_SHIFT) 352f7702afSIdo Yariv #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) 362f7702afSIdo Yariv 372f7702afSIdo Yariv #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) 382f7702afSIdo Yariv #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) 392f7702afSIdo Yariv 402f7702afSIdo Yariv /* 412f7702afSIdo Yariv * "small page" address mask and size definitions. 422f7702afSIdo Yariv */ 432f7702afSIdo Yariv #define IOPTE_SHIFT 12 442f7702afSIdo Yariv #define IOPTE_SIZE (1UL << IOPTE_SHIFT) 452f7702afSIdo Yariv #define IOPTE_MASK (~(IOPTE_SIZE - 1)) 462f7702afSIdo Yariv 472f7702afSIdo Yariv /* 482f7702afSIdo Yariv * "large page" address mask and size definitions. 492f7702afSIdo Yariv */ 502f7702afSIdo Yariv #define IOLARGE_SHIFT 16 512f7702afSIdo Yariv #define IOLARGE_SIZE (1UL << IOLARGE_SHIFT) 522f7702afSIdo Yariv #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) 532f7702afSIdo Yariv 542f7702afSIdo Yariv #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) 552f7702afSIdo Yariv #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) 562f7702afSIdo Yariv 572f7702afSIdo Yariv #define IOPAGE_MASK IOPTE_MASK 582f7702afSIdo Yariv 592f7702afSIdo Yariv /** 602f7702afSIdo Yariv * omap_iommu_translate() - va to pa translation 612f7702afSIdo Yariv * @d: omap iommu descriptor 622f7702afSIdo Yariv * @va: virtual address 632f7702afSIdo Yariv * @mask: omap iommu descriptor mask 642f7702afSIdo Yariv * 652f7702afSIdo Yariv * va to pa translation 662f7702afSIdo Yariv */ 672f7702afSIdo Yariv static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask) 682f7702afSIdo Yariv { 692f7702afSIdo Yariv return (d & mask) | (va & (~mask)); 702f7702afSIdo Yariv } 712f7702afSIdo Yariv 722f7702afSIdo Yariv /* 732f7702afSIdo Yariv * some descriptor attributes. 742f7702afSIdo Yariv */ 752f7702afSIdo Yariv #define IOPGD_TABLE (1 << 0) 762f7702afSIdo Yariv #define IOPGD_SECTION (2 << 0) 772f7702afSIdo Yariv #define IOPGD_SUPER (1 << 18 | 2 << 0) 782f7702afSIdo Yariv 792f7702afSIdo Yariv #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) 802f7702afSIdo Yariv #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION) 812f7702afSIdo Yariv #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER) 822f7702afSIdo Yariv 832f7702afSIdo Yariv #define IOPTE_SMALL (2 << 0) 842f7702afSIdo Yariv #define IOPTE_LARGE (1 << 0) 852f7702afSIdo Yariv 862f7702afSIdo Yariv #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL) 872f7702afSIdo Yariv #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE) 882f7702afSIdo Yariv 892f7702afSIdo Yariv /* to find an entry in a page-table-directory */ 902f7702afSIdo Yariv #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) 912f7702afSIdo Yariv #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) 922f7702afSIdo Yariv 932f7702afSIdo Yariv #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) 942f7702afSIdo Yariv #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) 952f7702afSIdo Yariv 962f7702afSIdo Yariv /* to find an entry in the second-level page table. */ 972f7702afSIdo Yariv #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) 982f7702afSIdo Yariv #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) 992f7702afSIdo Yariv 1002f7702afSIdo Yariv static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, 1012f7702afSIdo Yariv u32 flags) 1022f7702afSIdo Yariv { 1032f7702afSIdo Yariv memset(e, 0, sizeof(*e)); 1042f7702afSIdo Yariv 1052f7702afSIdo Yariv e->da = da; 1062f7702afSIdo Yariv e->pa = pa; 1072f7702afSIdo Yariv e->valid = 1; 1082f7702afSIdo Yariv /* FIXME: add OMAP1 support */ 1092f7702afSIdo Yariv e->pgsz = flags & MMU_CAM_PGSZ_MASK; 1102f7702afSIdo Yariv e->endian = flags & MMU_RAM_ENDIAN_MASK; 1112f7702afSIdo Yariv e->elsz = flags & MMU_RAM_ELSZ_MASK; 1122f7702afSIdo Yariv e->mixed = flags & MMU_RAM_MIXED_MASK; 1132f7702afSIdo Yariv 1142f7702afSIdo Yariv return iopgsz_to_bytes(e->pgsz); 1152f7702afSIdo Yariv } 1162f7702afSIdo Yariv 1172f7702afSIdo Yariv #define to_iommu(dev) \ 1182f7702afSIdo Yariv (struct omap_iommu *)platform_get_drvdata(to_platform_device(dev)) 1192f7702afSIdo Yariv 1202f7702afSIdo Yariv #endif /* __PLAT_OMAP_IOMMU_H */ 121