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 13ad8e29a0SSuman Anna #ifndef _OMAP_IOPGTABLE_H 14ad8e29a0SSuman Anna #define _OMAP_IOPGTABLE_H 15ad8e29a0SSuman Anna 165ff98fa6SSuman Anna #include <linux/bitops.h> 175ff98fa6SSuman Anna 182f7702afSIdo Yariv /* 192f7702afSIdo Yariv * "L2 table" address mask and size definitions. 202f7702afSIdo Yariv */ 212f7702afSIdo Yariv #define IOPGD_SHIFT 20 225ff98fa6SSuman Anna #define IOPGD_SIZE BIT(IOPGD_SHIFT) 232f7702afSIdo Yariv #define IOPGD_MASK (~(IOPGD_SIZE - 1)) 242f7702afSIdo Yariv 252f7702afSIdo Yariv /* 262f7702afSIdo Yariv * "section" address mask and size definitions. 272f7702afSIdo Yariv */ 282f7702afSIdo Yariv #define IOSECTION_SHIFT 20 295ff98fa6SSuman Anna #define IOSECTION_SIZE BIT(IOSECTION_SHIFT) 302f7702afSIdo Yariv #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) 312f7702afSIdo Yariv 322f7702afSIdo Yariv /* 332f7702afSIdo Yariv * "supersection" address mask and size definitions. 342f7702afSIdo Yariv */ 352f7702afSIdo Yariv #define IOSUPER_SHIFT 24 365ff98fa6SSuman Anna #define IOSUPER_SIZE BIT(IOSUPER_SHIFT) 372f7702afSIdo Yariv #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) 382f7702afSIdo Yariv 392f7702afSIdo Yariv #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) 402f7702afSIdo Yariv #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) 412f7702afSIdo Yariv 422f7702afSIdo Yariv /* 432f7702afSIdo Yariv * "small page" address mask and size definitions. 442f7702afSIdo Yariv */ 452f7702afSIdo Yariv #define IOPTE_SHIFT 12 465ff98fa6SSuman Anna #define IOPTE_SIZE BIT(IOPTE_SHIFT) 472f7702afSIdo Yariv #define IOPTE_MASK (~(IOPTE_SIZE - 1)) 482f7702afSIdo Yariv 492f7702afSIdo Yariv /* 502f7702afSIdo Yariv * "large page" address mask and size definitions. 512f7702afSIdo Yariv */ 522f7702afSIdo Yariv #define IOLARGE_SHIFT 16 535ff98fa6SSuman Anna #define IOLARGE_SIZE BIT(IOLARGE_SHIFT) 542f7702afSIdo Yariv #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) 552f7702afSIdo Yariv 562f7702afSIdo Yariv #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) 572f7702afSIdo Yariv #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) 582f7702afSIdo Yariv 592f7702afSIdo Yariv #define IOPAGE_MASK IOPTE_MASK 602f7702afSIdo Yariv 612f7702afSIdo Yariv /** 622f7702afSIdo Yariv * omap_iommu_translate() - va to pa translation 632f7702afSIdo Yariv * @d: omap iommu descriptor 642f7702afSIdo Yariv * @va: virtual address 652f7702afSIdo Yariv * @mask: omap iommu descriptor mask 662f7702afSIdo Yariv * 672f7702afSIdo Yariv * va to pa translation 682f7702afSIdo Yariv */ 692f7702afSIdo Yariv static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask) 702f7702afSIdo Yariv { 712f7702afSIdo Yariv return (d & mask) | (va & (~mask)); 722f7702afSIdo Yariv } 732f7702afSIdo Yariv 742f7702afSIdo Yariv /* 752f7702afSIdo Yariv * some descriptor attributes. 762f7702afSIdo Yariv */ 775ff98fa6SSuman Anna #define IOPGD_TABLE (1) 785ff98fa6SSuman Anna #define IOPGD_SECTION (2) 795ff98fa6SSuman Anna #define IOPGD_SUPER (BIT(18) | IOPGD_SECTION) 802f7702afSIdo Yariv 812f7702afSIdo Yariv #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) 822f7702afSIdo Yariv #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION) 832f7702afSIdo Yariv #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER) 842f7702afSIdo Yariv 855ff98fa6SSuman Anna #define IOPTE_SMALL (2) 865ff98fa6SSuman Anna #define IOPTE_LARGE (1) 872f7702afSIdo Yariv 882f7702afSIdo Yariv #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL) 892f7702afSIdo Yariv #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE) 902f7702afSIdo Yariv 912f7702afSIdo Yariv /* to find an entry in a page-table-directory */ 922f7702afSIdo Yariv #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) 932f7702afSIdo Yariv #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) 942f7702afSIdo Yariv 952f7702afSIdo Yariv #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) 962f7702afSIdo Yariv #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) 972f7702afSIdo Yariv 982f7702afSIdo Yariv /* to find an entry in the second-level page table. */ 992f7702afSIdo Yariv #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) 1002f7702afSIdo Yariv #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) 101ad8e29a0SSuman Anna 102ad8e29a0SSuman Anna #endif /* _OMAP_IOPGTABLE_H */ 103