1 /* 2 * page.h: Various defines and such for MMU operations on the Sparc for 3 * the Linux kernel. 4 * 5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 6 */ 7 8 #ifndef _SPARC_PAGE_H 9 #define _SPARC_PAGE_H 10 11 #define PAGE_SHIFT 12 12 13 #ifndef __ASSEMBLY__ 14 /* I have my suspicions... -DaveM */ 15 #define PAGE_SIZE (1UL << PAGE_SHIFT) 16 #else 17 #define PAGE_SIZE (1 << PAGE_SHIFT) 18 #endif 19 #define PAGE_MASK (~(PAGE_SIZE-1)) 20 21 #include <asm/btfixup.h> 22 23 #ifndef __ASSEMBLY__ 24 25 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 26 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 27 #define clear_user_page(addr, vaddr, page) \ 28 do { clear_page(addr); \ 29 sparc_flush_page_to_ram(page); \ 30 } while (0) 31 #define copy_user_page(to, from, vaddr, page) \ 32 do { copy_page(to, from); \ 33 sparc_flush_page_to_ram(page); \ 34 } while (0) 35 36 /* The following structure is used to hold the physical 37 * memory configuration of the machine. This is filled in 38 * prom_meminit() and is later used by mem_init() to set up 39 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of 40 * these structs, this is arbitrary. The entry after the 41 * last valid one has num_bytes==0. 42 */ 43 struct sparc_phys_banks { 44 unsigned long base_addr; 45 unsigned long num_bytes; 46 }; 47 48 #define SPARC_PHYS_BANKS 32 49 50 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; 51 52 /* Cache alias structure. Entry is valid if context != -1. */ 53 struct cache_palias { 54 unsigned long vaddr; 55 int context; 56 }; 57 58 /* passing structs on the Sparc slow us down tremendously... */ 59 60 /* #define STRICT_MM_TYPECHECKS */ 61 62 #ifdef STRICT_MM_TYPECHECKS 63 /* 64 * These are used to make use of C type-checking.. 65 */ 66 typedef struct { unsigned long pte; } pte_t; 67 typedef struct { unsigned long iopte; } iopte_t; 68 typedef struct { unsigned long pmdv[16]; } pmd_t; 69 typedef struct { unsigned long pgd; } pgd_t; 70 typedef struct { unsigned long ctxd; } ctxd_t; 71 typedef struct { unsigned long pgprot; } pgprot_t; 72 typedef struct { unsigned long iopgprot; } iopgprot_t; 73 74 #define pte_val(x) ((x).pte) 75 #define iopte_val(x) ((x).iopte) 76 #define pmd_val(x) ((x).pmdv[0]) 77 #define pgd_val(x) ((x).pgd) 78 #define ctxd_val(x) ((x).ctxd) 79 #define pgprot_val(x) ((x).pgprot) 80 #define iopgprot_val(x) ((x).iopgprot) 81 82 #define __pte(x) ((pte_t) { (x) } ) 83 #define __iopte(x) ((iopte_t) { (x) } ) 84 /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ 85 #define __pgd(x) ((pgd_t) { (x) } ) 86 #define __ctxd(x) ((ctxd_t) { (x) } ) 87 #define __pgprot(x) ((pgprot_t) { (x) } ) 88 #define __iopgprot(x) ((iopgprot_t) { (x) } ) 89 90 #else 91 /* 92 * .. while these make it easier on the compiler 93 */ 94 typedef unsigned long pte_t; 95 typedef unsigned long iopte_t; 96 typedef struct { unsigned long pmdv[16]; } pmd_t; 97 typedef unsigned long pgd_t; 98 typedef unsigned long ctxd_t; 99 typedef unsigned long pgprot_t; 100 typedef unsigned long iopgprot_t; 101 102 #define pte_val(x) (x) 103 #define iopte_val(x) (x) 104 #define pmd_val(x) ((x).pmdv[0]) 105 #define pgd_val(x) (x) 106 #define ctxd_val(x) (x) 107 #define pgprot_val(x) (x) 108 #define iopgprot_val(x) (x) 109 110 #define __pte(x) (x) 111 #define __iopte(x) (x) 112 /* #define __pmd(x) (x) */ /* XXX later */ 113 #define __pgd(x) (x) 114 #define __ctxd(x) (x) 115 #define __pgprot(x) (x) 116 #define __iopgprot(x) (x) 117 118 #endif 119 120 typedef struct page *pgtable_t; 121 122 extern unsigned long sparc_unmapped_base; 123 124 BTFIXUPDEF_SETHI(sparc_unmapped_base) 125 126 #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) 127 128 #else /* !(__ASSEMBLY__) */ 129 130 #define __pgprot(x) (x) 131 132 #endif /* !(__ASSEMBLY__) */ 133 134 #define PAGE_OFFSET 0xf0000000 135 #ifndef __ASSEMBLY__ 136 extern unsigned long phys_base; 137 extern unsigned long pfn_base; 138 #endif 139 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) 140 #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) 141 142 #define virt_to_phys __pa 143 #define phys_to_virt __va 144 145 #define ARCH_PFN_OFFSET (pfn_base) 146 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 147 148 #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) 149 #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) 150 151 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 152 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 153 154 #include <asm-generic/memory_model.h> 155 #include <asm-generic/getorder.h> 156 157 #endif /* _SPARC_PAGE_H */ 158