1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * omap iommu: pagetable definitions 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2008-2010 Nokia Corporation 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef _OMAP_IOPGTABLE_H 11*4882a593Smuzhiyun #define _OMAP_IOPGTABLE_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <linux/bitops.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* 16*4882a593Smuzhiyun * "L2 table" address mask and size definitions. 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun #define IOPGD_SHIFT 20 19*4882a593Smuzhiyun #define IOPGD_SIZE BIT(IOPGD_SHIFT) 20*4882a593Smuzhiyun #define IOPGD_MASK (~(IOPGD_SIZE - 1)) 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun /* 23*4882a593Smuzhiyun * "section" address mask and size definitions. 24*4882a593Smuzhiyun */ 25*4882a593Smuzhiyun #define IOSECTION_SHIFT 20 26*4882a593Smuzhiyun #define IOSECTION_SIZE BIT(IOSECTION_SHIFT) 27*4882a593Smuzhiyun #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* 30*4882a593Smuzhiyun * "supersection" address mask and size definitions. 31*4882a593Smuzhiyun */ 32*4882a593Smuzhiyun #define IOSUPER_SHIFT 24 33*4882a593Smuzhiyun #define IOSUPER_SIZE BIT(IOSUPER_SHIFT) 34*4882a593Smuzhiyun #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) 37*4882a593Smuzhiyun #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* 40*4882a593Smuzhiyun * "small page" address mask and size definitions. 41*4882a593Smuzhiyun */ 42*4882a593Smuzhiyun #define IOPTE_SHIFT 12 43*4882a593Smuzhiyun #define IOPTE_SIZE BIT(IOPTE_SHIFT) 44*4882a593Smuzhiyun #define IOPTE_MASK (~(IOPTE_SIZE - 1)) 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* 47*4882a593Smuzhiyun * "large page" address mask and size definitions. 48*4882a593Smuzhiyun */ 49*4882a593Smuzhiyun #define IOLARGE_SHIFT 16 50*4882a593Smuzhiyun #define IOLARGE_SIZE BIT(IOLARGE_SHIFT) 51*4882a593Smuzhiyun #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) 54*4882a593Smuzhiyun #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun #define IOPAGE_MASK IOPTE_MASK 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun /** 59*4882a593Smuzhiyun * omap_iommu_translate() - va to pa translation 60*4882a593Smuzhiyun * @d: omap iommu descriptor 61*4882a593Smuzhiyun * @va: virtual address 62*4882a593Smuzhiyun * @mask: omap iommu descriptor mask 63*4882a593Smuzhiyun * 64*4882a593Smuzhiyun * va to pa translation 65*4882a593Smuzhiyun */ omap_iommu_translate(unsigned long d,dma_addr_t va,dma_addr_t mask)66*4882a593Smuzhiyunstatic inline phys_addr_t omap_iommu_translate(unsigned long d, dma_addr_t va, 67*4882a593Smuzhiyun dma_addr_t mask) 68*4882a593Smuzhiyun { 69*4882a593Smuzhiyun return (d & mask) | (va & (~mask)); 70*4882a593Smuzhiyun } 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun /* 73*4882a593Smuzhiyun * some descriptor attributes. 74*4882a593Smuzhiyun */ 75*4882a593Smuzhiyun #define IOPGD_TABLE (1) 76*4882a593Smuzhiyun #define IOPGD_SECTION (2) 77*4882a593Smuzhiyun #define IOPGD_SUPER (BIT(18) | IOPGD_SECTION) 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) 80*4882a593Smuzhiyun #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION) 81*4882a593Smuzhiyun #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER) 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun #define IOPTE_SMALL (2) 84*4882a593Smuzhiyun #define IOPTE_LARGE (1) 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL) 87*4882a593Smuzhiyun #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE) 88*4882a593Smuzhiyun 89*4882a593Smuzhiyun /* to find an entry in a page-table-directory */ 90*4882a593Smuzhiyun #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) 91*4882a593Smuzhiyun #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) 94*4882a593Smuzhiyun #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) 95*4882a593Smuzhiyun 96*4882a593Smuzhiyun /* to find an entry in the second-level page table. */ 97*4882a593Smuzhiyun #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) 98*4882a593Smuzhiyun #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) 99*4882a593Smuzhiyun 100*4882a593Smuzhiyun #endif /* _OMAP_IOPGTABLE_H */ 101