/* SPDX-License-Identifier: GPL-2.0-only */ /* * omap iommu: pagetable definitions * * Copyright (C) 2008-2010 Nokia Corporation * * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> */ #ifndef _OMAP_IOPGTABLE_H #define _OMAP_IOPGTABLE_H #include <linux/bitops.h> /* * "L2 table" address mask and size definitions. */ #define IOPGD_SHIFT 20 #define IOPGD_SIZE BIT(IOPGD_SHIFT) #define IOPGD_MASK (~(IOPGD_SIZE - 1)) /* * "section" address mask and size definitions. */ #define IOSECTION_SHIFT 20 #define IOSECTION_SIZE BIT(IOSECTION_SHIFT) #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) /* * "supersection" address mask and size definitions. */ #define IOSUPER_SHIFT 24 #define IOSUPER_SIZE BIT(IOSUPER_SHIFT) #define IOSUPER_MASK (~(IOSUPER_SIZE - 1)) #define PTRS_PER_IOPGD (1UL << (32 - IOPGD_SHIFT)) #define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) /* * "small page" address mask and size definitions. */ #define IOPTE_SHIFT 12 #define IOPTE_SIZE BIT(IOPTE_SHIFT) #define IOPTE_MASK (~(IOPTE_SIZE - 1)) /* * "large page" address mask and size definitions. */ #define IOLARGE_SHIFT 16 #define IOLARGE_SIZE BIT(IOLARGE_SHIFT) #define IOLARGE_MASK (~(IOLARGE_SIZE - 1)) #define PTRS_PER_IOPTE (1UL << (IOPGD_SHIFT - IOPTE_SHIFT)) #define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) #define IOPAGE_MASK IOPTE_MASK /** * omap_iommu_translate() - va to pa translation * @d: omap iommu descriptor * @va: virtual address * @mask: omap iommu descriptor mask * * va to pa translation */ static inline phys_addr_t omap_iommu_translate(unsigned long d, dma_addr_t va, dma_addr_t mask) { return (d & mask) | (va & (~mask)); } /* * some descriptor attributes. */ #define IOPGD_TABLE (1) #define IOPGD_SECTION (2) #define IOPGD_SUPER (BIT(18) | IOPGD_SECTION) #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) #define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION) #define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER) #define IOPTE_SMALL (2) #define IOPTE_LARGE (1) #define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL) #define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE) /* to find an entry in a page-table-directory */ #define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1)) #define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da)) #define iopgd_page_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) #define iopgd_page_vaddr(iopgd) ((u32 *)phys_to_virt(iopgd_page_paddr(iopgd))) /* to find an entry in the second-level page table. */ #define iopte_index(da) (((da) >> IOPTE_SHIFT) & (PTRS_PER_IOPTE - 1)) #define iopte_offset(iopgd, da) (iopgd_page_vaddr(iopgd) + iopte_index(da)) #endif /* _OMAP_IOPGTABLE_H */