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