projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 002547b4 | 2 | /* |
| 4baa9922 | 3 | * arch/arm/include/asm/pgtable-nommu.h |
| 002547b4 RK |
4 | * |
| 5 | * Copyright (C) 1995-2002 Russell King | |
| 6 | * Copyright (C) 2004 Hyok S. Choi | |
| 002547b4 RK |
7 | */ |
| 8 | #ifndef _ASMARM_PGTABLE_NOMMU_H | |
| 9 | #define _ASMARM_PGTABLE_NOMMU_H | |
| 10 | ||
| 11 | #ifndef __ASSEMBLY__ | |
| 12 | ||
| 002547b4 RK |
13 | #include <linux/slab.h> |
| 14 | #include <asm/processor.h> | |
| 15 | #include <asm/page.h> | |
| 002547b4 RK |
16 | |
| 17 | /* | |
| 18 | * Trivial page table functions. | |
| 19 | */ | |
| 20 | #define pgd_present(pgd) (1) | |
| 21 | #define pgd_none(pgd) (0) | |
| 22 | #define pgd_bad(pgd) (0) | |
| 23 | #define pgd_clear(pgdp) | |
| 24 | #define kern_addr_valid(addr) (1) | |
| 25 | #define pmd_offset(a, b) ((void *)0) | |
| 26 | /* FIXME */ | |
| 27 | /* | |
| 28 | * PMD_SHIFT determines the size of the area a second-level page table can map | |
| 29 | * PGDIR_SHIFT determines what a third-level page table entry can map | |
| 30 | */ | |
| 31 | #define PGDIR_SHIFT 21 | |
| 32 | ||
| 33 | #define PGDIR_SIZE (1UL << PGDIR_SHIFT) | |
| 34 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) | |
| 35 | /* FIXME */ | |
| 36 | ||
| 37 | #define PAGE_NONE __pgprot(0) | |
| 38 | #define PAGE_SHARED __pgprot(0) | |
| 39 | #define PAGE_COPY __pgprot(0) | |
| 40 | #define PAGE_READONLY __pgprot(0) | |
| 41 | #define PAGE_KERNEL __pgprot(0) | |
| 42 | ||
| 002547b4 RK |
43 | #define swapper_pg_dir ((pgd_t *) 0) |
| 44 | ||
| 45 | #define __swp_type(x) (0) | |
| 46 | #define __swp_offset(x) (0) | |
| 47 | #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) | |
| 48 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
| 49 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
| 50 | ||
| 51 | ||
| 52 | typedef pte_t *pte_addr_t; | |
| 53 | ||
| 002547b4 RK |
54 | /* |
| 55 | * ZERO_PAGE is a global shared page that is always zero: used | |
| 56 | * for zero-mapped memory areas etc.. | |
| 57 | */ | |
| 58 | #define ZERO_PAGE(vaddr) (virt_to_page(0)) | |
| 59 | ||
| 60 | /* | |
| 61 | * Mark the prot value as uncacheable and unbufferable. | |
| 62 | */ | |
| e2fce0a2 AB |
63 | #define pgprot_noncached(prot) (prot) |
| 64 | #define pgprot_writecombine(prot) (prot) | |
| 7ef4783e | 65 | #define pgprot_device(prot) (prot) |
| 002547b4 RK |
66 | |
| 67 | ||
| 68 | /* | |
| 69 | * These would be in other places but having them here reduces the diffs. | |
| 70 | */ | |
| 71 | extern unsigned int kobjsize(const void *objp); | |
| 002547b4 | 72 | |
| 002547b4 RK |
73 | /* |
| 74 | * All 32bit addresses are effectively valid for vmalloc... | |
| 75 | * Sort of meaningless for non-VM targets. | |
| 76 | */ | |
| c931b4f6 FB |
77 | #define VMALLOC_START 0UL |
| 78 | #define VMALLOC_END 0xffffffffUL | |
| 002547b4 | 79 | |
| d016bf7e | 80 | #define FIRST_USER_ADDRESS 0UL |
| 002547b4 | 81 | |
| 92df7851 GU |
82 | #include <asm-generic/pgtable.h> |
| 83 | ||
| 002547b4 RK |
84 | #else |
| 85 | ||
| 86 | /* | |
| 87 | * dummy tlb and user structures. | |
| 88 | */ | |
| 89 | #define v3_tlb_fns (0) | |
| 90 | #define v4_tlb_fns (0) | |
| 91 | #define v4wb_tlb_fns (0) | |
| 92 | #define v4wbi_tlb_fns (0) | |
| 7b4c965a | 93 | #define v6wbi_tlb_fns (0) |
| 2eb8c82b | 94 | #define v7wbi_tlb_fns (0) |
| 002547b4 RK |
95 | |
| 96 | #define v3_user_fns (0) | |
| 97 | #define v4_user_fns (0) | |
| 98 | #define v4_mc_user_fns (0) | |
| 99 | #define v4wb_user_fns (0) | |
| 100 | #define v4wt_user_fns (0) | |
| 101 | #define v6_user_fns (0) | |
| 102 | #define xscale_mc_user_fns (0) | |
| 103 | ||
| 104 | #endif /*__ASSEMBLY__*/ | |
| 105 | ||
| 106 | #endif /* _ASMARM_PGTABLE_H */ |