Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | /* * arch/arm/include/asm/pgtable-nommu.h * * Copyright (C) 1995-2002 Russell King * Copyright (C) 2004 Hyok S. Choi * * 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 _ASMARM_PGTABLE_NOMMU_H #define _ASMARM_PGTABLE_NOMMU_H #ifndef __ASSEMBLY__ #include <linux/slab.h> #include <asm/processor.h> #include <asm/page.h> /* * Trivial page table functions. */ #define pgd_present(pgd) (1) #define pgd_none(pgd) (0) #define pgd_bad(pgd) (0) #define pgd_clear(pgdp) #define kern_addr_valid(addr) (1) #define pmd_offset(a, b) ((void *)0) /* FIXME */ /* * PMD_SHIFT determines the size of the area a second-level page table can map * PGDIR_SHIFT determines what a third-level page table entry can map */ #define PGDIR_SHIFT 21 #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) /* FIXME */ #define PAGE_NONE __pgprot(0) #define PAGE_SHARED __pgprot(0) #define PAGE_COPY __pgprot(0) #define PAGE_READONLY __pgprot(0) #define PAGE_KERNEL __pgprot(0) #define swapper_pg_dir ((pgd_t *) 0) #define __swp_type(x) (0) #define __swp_offset(x) (0) #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) typedef pte_t *pte_addr_t; static inline int pte_file(pte_t pte) { return 0; } /* * ZERO_PAGE is a global shared page that is always zero: used * for zero-mapped memory areas etc.. */ #define ZERO_PAGE(vaddr) (virt_to_page(0)) /* * Mark the prot value as uncacheable and unbufferable. */ #define pgprot_noncached(prot) __pgprot(0) #define pgprot_writecombine(prot) __pgprot(0) #define pgprot_dmacoherent(prot) __pgprot(0) /* * These would be in other places but having them here reduces the diffs. */ extern unsigned int kobjsize(const void *objp); /* * No page table caches to initialise. */ #define pgtable_cache_init() do { } while (0) /* * All 32bit addresses are effectively valid for vmalloc... * Sort of meaningless for non-VM targets. */ #define VMALLOC_START 0UL #define VMALLOC_END 0xffffffffUL #define FIRST_USER_ADDRESS (0) #include <asm-generic/pgtable.h> #else /* * dummy tlb and user structures. */ #define v3_tlb_fns (0) #define v4_tlb_fns (0) #define v4wb_tlb_fns (0) #define v4wbi_tlb_fns (0) #define v6wbi_tlb_fns (0) #define v7wbi_tlb_fns (0) #define v3_user_fns (0) #define v4_user_fns (0) #define v4_mc_user_fns (0) #define v4wb_user_fns (0) #define v4wt_user_fns (0) #define v6_user_fns (0) #define xscale_mc_user_fns (0) #endif /*__ASSEMBLY__*/ #endif /* _ASMARM_PGTABLE_H */ |