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 #ifdef CONFIG_SUN4 12 #define PAGE_SHIFT 13 13 #else 14 #define PAGE_SHIFT 12 15 #endif 16 #ifndef __ASSEMBLY__ 17 /* I have my suspicions... -DaveM */ 18 #define PAGE_SIZE (1UL << PAGE_SHIFT) 19 #else 20 #define PAGE_SIZE (1 << PAGE_SHIFT) 21 #endif 22 #define PAGE_MASK (~(PAGE_SIZE-1)) 23 24 #include <asm/btfixup.h> 25 26 #ifndef __ASSEMBLY__ 27 28 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 29 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 30 #define clear_user_page(addr, vaddr, page) \ 31 do { clear_page(addr); \ 32 sparc_flush_page_to_ram(page); \ 33 } while (0) 34 #define copy_user_page(to, from, vaddr, page) \ 35 do { copy_page(to, from); \ 36 sparc_flush_page_to_ram(page); \ 37 } while (0) 38 39 /* The following structure is used to hold the physical 40 * memory configuration of the machine. This is filled in 41 * prom_meminit() and is later used by mem_init() to set up 42 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of 43 * these structs, this is arbitrary. The entry after the 44 * last valid one has num_bytes==0. 45 */ 46 struct sparc_phys_banks { 47 unsigned long base_addr; 48 unsigned long num_bytes; 49 }; 50 51 #define SPARC_PHYS_BANKS 32 52 53 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; 54 55 /* Cache alias structure. Entry is valid if context != -1. */ 56 struct cache_palias { 57 unsigned long vaddr; 58 int context; 59 }; 60 61 /* passing structs on the Sparc slow us down tremendously... */ 62 63 /* #define STRICT_MM_TYPECHECKS */ 64 65 #ifdef STRICT_MM_TYPECHECKS 66 /* 67 * These are used to make use of C type-checking.. 68 */ 69 typedef struct { unsigned long pte; } pte_t; 70 typedef struct { unsigned long iopte; } iopte_t; 71 typedef struct { unsigned long pmdv[16]; } pmd_t; 72 typedef struct { unsigned long pgd; } pgd_t; 73 typedef struct { unsigned long ctxd; } ctxd_t; 74 typedef struct { unsigned long pgprot; } pgprot_t; 75 typedef struct { unsigned long iopgprot; } iopgprot_t; 76 77 #define pte_val(x) ((x).pte) 78 #define iopte_val(x) ((x).iopte) 79 #define pmd_val(x) ((x).pmdv[0]) 80 #define pgd_val(x) ((x).pgd) 81 #define ctxd_val(x) ((x).ctxd) 82 #define pgprot_val(x) ((x).pgprot) 83 #define iopgprot_val(x) ((x).iopgprot) 84 85 #define __pte(x) ((pte_t) { (x) } ) 86 #define __iopte(x) ((iopte_t) { (x) } ) 87 /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ 88 #define __pgd(x) ((pgd_t) { (x) } ) 89 #define __ctxd(x) ((ctxd_t) { (x) } ) 90 #define __pgprot(x) ((pgprot_t) { (x) } ) 91 #define __iopgprot(x) ((iopgprot_t) { (x) } ) 92 93 #else 94 /* 95 * .. while these make it easier on the compiler 96 */ 97 typedef unsigned long pte_t; 98 typedef unsigned long iopte_t; 99 typedef struct { unsigned long pmdv[16]; } pmd_t; 100 typedef unsigned long pgd_t; 101 typedef unsigned long ctxd_t; 102 typedef unsigned long pgprot_t; 103 typedef unsigned long iopgprot_t; 104 105 #define pte_val(x) (x) 106 #define iopte_val(x) (x) 107 #define pmd_val(x) ((x).pmdv[0]) 108 #define pgd_val(x) (x) 109 #define ctxd_val(x) (x) 110 #define pgprot_val(x) (x) 111 #define iopgprot_val(x) (x) 112 113 #define __pte(x) (x) 114 #define __iopte(x) (x) 115 /* #define __pmd(x) (x) */ /* XXX later */ 116 #define __pgd(x) (x) 117 #define __ctxd(x) (x) 118 #define __pgprot(x) (x) 119 #define __iopgprot(x) (x) 120 121 #endif 122 123 typedef struct page *pgtable_t; 124 125 extern unsigned long sparc_unmapped_base; 126 127 BTFIXUPDEF_SETHI(sparc_unmapped_base) 128 129 #define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base) 130 131 #else /* !(__ASSEMBLY__) */ 132 133 #define __pgprot(x) (x) 134 135 #endif /* !(__ASSEMBLY__) */ 136 137 #define PAGE_OFFSET 0xf0000000 138 #ifndef __ASSEMBLY__ 139 extern unsigned long phys_base; 140 extern unsigned long pfn_base; 141 #endif 142 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) 143 #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) 144 145 #define virt_to_phys __pa 146 #define phys_to_virt __va 147 148 #define ARCH_PFN_OFFSET (pfn_base) 149 #define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT))) 150 151 #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) 152 #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) 153 154 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 155 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 156 157 #include <asm-generic/memory_model.h> 158 #include <asm-generic/page.h> 159 160 #endif /* _SPARC_PAGE_H */ 161