| Nicholas Flintham | 1e3d311 | 2013-04-10 10:48:38 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/include/asm/pgtable-2level.h |
| 3 | * |
| 4 | * Copyright (C) 1995-2002 Russell King |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #ifndef _ASM_PGTABLE_2LEVEL_H |
| 11 | #define _ASM_PGTABLE_2LEVEL_H |
| 12 | |
| 13 | #define PTRS_PER_PTE 512 |
| 14 | #define PTRS_PER_PMD 1 |
| 15 | #define PTRS_PER_PGD 2048 |
| 16 | |
| 17 | #define PTE_HWTABLE_PTRS (PTRS_PER_PTE) |
| 18 | #define PTE_HWTABLE_OFF (PTE_HWTABLE_PTRS * sizeof(pte_t)) |
| 19 | #define PTE_HWTABLE_SIZE (PTRS_PER_PTE * sizeof(u32)) |
| 20 | |
| 21 | #define PMD_SHIFT 21 |
| 22 | #define PGDIR_SHIFT 21 |
| 23 | |
| 24 | #define PMD_SIZE (1UL << PMD_SHIFT) |
| 25 | #define PMD_MASK (~(PMD_SIZE-1)) |
| 26 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
| 27 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
| 28 | |
| 29 | #define SECTION_SHIFT 20 |
| 30 | #define SECTION_SIZE (1UL << SECTION_SHIFT) |
| 31 | #define SECTION_MASK (~(SECTION_SIZE-1)) |
| 32 | |
| 33 | #define SUPERSECTION_SHIFT 24 |
| 34 | #define SUPERSECTION_SIZE (1UL << SUPERSECTION_SHIFT) |
| 35 | #define SUPERSECTION_MASK (~(SUPERSECTION_SIZE-1)) |
| 36 | |
| 37 | #define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) |
| 38 | |
| 39 | #define L_PTE_PRESENT (_AT(pteval_t, 1) << 0) |
| 40 | #define L_PTE_YOUNG (_AT(pteval_t, 1) << 1) |
| 41 | #define L_PTE_FILE (_AT(pteval_t, 1) << 2) |
| 42 | #define L_PTE_DIRTY (_AT(pteval_t, 1) << 6) |
| 43 | #define L_PTE_RDONLY (_AT(pteval_t, 1) << 7) |
| 44 | #define L_PTE_USER (_AT(pteval_t, 1) << 8) |
| 45 | #define L_PTE_XN (_AT(pteval_t, 1) << 9) |
| 46 | #define L_PTE_SHARED (_AT(pteval_t, 1) << 10) |
| 47 | |
| 48 | #define L_PTE_MT_UNCACHED (_AT(pteval_t, 0x00) << 2) |
| 49 | #define L_PTE_MT_BUFFERABLE (_AT(pteval_t, 0x01) << 2) |
| 50 | #define L_PTE_MT_WRITETHROUGH (_AT(pteval_t, 0x02) << 2) |
| 51 | #define L_PTE_MT_WRITEBACK (_AT(pteval_t, 0x03) << 2) |
| 52 | #define L_PTE_MT_MINICACHE (_AT(pteval_t, 0x06) << 2) |
| 53 | #define L_PTE_MT_WRITEALLOC (_AT(pteval_t, 0x07) << 2) |
| 54 | #define L_PTE_MT_DEV_SHARED (_AT(pteval_t, 0x04) << 2) |
| 55 | #define L_PTE_MT_DEV_NONSHARED (_AT(pteval_t, 0x0c) << 2) |
| 56 | #define L_PTE_MT_DEV_WC (_AT(pteval_t, 0x09) << 2) |
| 57 | #define L_PTE_MT_DEV_CACHED (_AT(pteval_t, 0x0b) << 2) |
| 58 | #define L_PTE_MT_MASK (_AT(pteval_t, 0x0f) << 2) |
| 59 | |
| 60 | #ifndef __ASSEMBLY__ |
| 61 | |
| 62 | #define pud_none(pud) (0) |
| 63 | #define pud_bad(pud) (0) |
| 64 | #define pud_present(pud) (1) |
| 65 | #define pud_clear(pudp) do { } while (0) |
| 66 | #define set_pud(pud,pudp) do { } while (0) |
| 67 | |
| 68 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) |
| 69 | { |
| 70 | return (pmd_t *)pud; |
| 71 | } |
| 72 | |
| 73 | #define pmd_bad(pmd) (pmd_val(pmd) & 2) |
| 74 | |
| 75 | #define copy_pmd(pmdpd,pmdps) \ |
| 76 | do { \ |
| 77 | pmdpd[0] = pmdps[0]; \ |
| 78 | pmdpd[1] = pmdps[1]; \ |
| 79 | flush_pmd_entry(pmdpd); \ |
| 80 | } while (0) |
| 81 | |
| 82 | #define pmd_clear(pmdp) \ |
| 83 | do { \ |
| 84 | pmdp[0] = __pmd(0); \ |
| 85 | pmdp[1] = __pmd(0); \ |
| 86 | clean_pmd_entry(pmdp); \ |
| 87 | } while (0) |
| 88 | |
| 89 | #define pmd_addr_end(addr,end) (end) |
| 90 | |
| 91 | #define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext) |
| 92 | |
| 93 | #endif |
| 94 | |
| 95 | #endif |