/* * omap iommu: pagetable definitions * * Copyright (C) 2008-2010 Nokia Corporation * * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __PLAT_OMAP_IOMMU_H #define __PLAT_OMAP_IOMMU_H /* * "L2 table" address mask and size definitions. */ #define IOPGD_SHIFT 20 #define IOPGD_SIZE (1UL << IOPGD_SHIFT) #define IOPGD_MASK (~(IOPGD_SIZE - 1)) /* * "section" address mask and size definitions. */ #define IOSECTION_SHIFT 20 #define IOSECTION_SIZE (1UL << IOSECTION_SHIFT) #define IOSECTION_MASK (~(IOSECTION_SIZE - 1)) /* * "supersection" address mask and size definitions. */ #define IOSUPER_SHIFT 24 #define IOSUPER_SIZE (1UL << 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 (1UL << IOPTE_SHIFT) #define IOPTE_MASK (~(IOPTE_SIZE - 1)) /* * "large page" address mask and size definitions. */ #define IOLARGE_SHIFT 16 #define IOLARGE_SIZE (1UL << 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 /* * some descriptor attributes. */ #define IOPGD_TABLE (1 << 0) #define IOPGD_SECTION (2 << 0) #define IOPGD_SUPER (1 << 18 | 2 << 0) #define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE) #define IOPTE_SMALL (2 << 0) #define IOPTE_LARGE (1 << 0) /* 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)) static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa, u32 flags) { memset(e, 0, sizeof(*e)); e->da = da; e->pa = pa; e->valid = 1; /* FIXME: add OMAP1 support */ e->pgsz = flags & MMU_CAM_PGSZ_MASK; e->endian = flags & MMU_RAM_ENDIAN_MASK; e->elsz = flags & MMU_RAM_ELSZ_MASK; e->mixed = flags & MMU_RAM_MIXED_MASK; return iopgsz_to_bytes(e->pgsz); } #define to_iommu(dev) \ (struct iommu *)platform_get_drvdata(to_platform_device(dev)) #endif /* __PLAT_OMAP_IOMMU_H */