diff options
Diffstat (limited to 'arch/arm/plat-omap/iopgtable.h')
| -rw-r--r-- | arch/arm/plat-omap/iopgtable.h | 50 |
1 files changed, 39 insertions, 11 deletions
diff --git a/arch/arm/plat-omap/iopgtable.h b/arch/arm/plat-omap/iopgtable.h index 37dac434c7a1..ab23b6a140fd 100644 --- a/arch/arm/plat-omap/iopgtable.h +++ b/arch/arm/plat-omap/iopgtable.h @@ -1,7 +1,7 @@ /* * omap iommu: pagetable definitions * - * Copyright (C) 2008-2009 Nokia Corporation + * Copyright (C) 2008-2010 Nokia Corporation * * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> * @@ -13,26 +13,52 @@ #ifndef __PLAT_OMAP_IOMMU_H #define __PLAT_OMAP_IOMMU_H +/* + * "L2 table" address mask and size definitions. + */ #define IOPGD_SHIFT 20 -#define IOPGD_SIZE (1 << IOPGD_SHIFT) +#define IOPGD_SIZE (1UL << IOPGD_SHIFT) #define IOPGD_MASK (~(IOPGD_SIZE - 1)) -#define IOSECTION_MASK IOPGD_MASK -#define PTRS_PER_IOPGD (1 << (32 - IOPGD_SHIFT)) -#define IOPGD_TABLE_SIZE (PTRS_PER_IOPGD * sizeof(u32)) -#define IOSUPER_SIZE (IOPGD_SIZE << 4) +/* + * "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 (1 << IOPTE_SHIFT) +#define IOPTE_SIZE (1UL << IOPTE_SHIFT) #define IOPTE_MASK (~(IOPTE_SIZE - 1)) -#define IOPAGE_MASK IOPTE_MASK -#define PTRS_PER_IOPTE (1 << (IOPGD_SHIFT - IOPTE_SHIFT)) -#define IOPTE_TABLE_SIZE (PTRS_PER_IOPTE * sizeof(u32)) -#define IOLARGE_SIZE (IOPTE_SIZE << 4) +/* + * "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) @@ -40,12 +66,14 @@ #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 iopte_paddr(iopgd) (*iopgd & ~((1 << 10) - 1)) #define iopte_vaddr(iopgd) ((u32 *)phys_to_virt(iopte_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) (iopte_vaddr(iopgd) + iopte_index(da)) |