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 #ifndef __ASSEMBLY__ 18 19 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 20 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 21 #define clear_user_page(addr, vaddr, page) \ 22 do { clear_page(addr); \ 23 sparc_flush_page_to_ram(page); \ 24 } while (0) 25 #define copy_user_page(to, from, vaddr, page) \ 26 do { copy_page(to, from); \ 27 sparc_flush_page_to_ram(page); \ 28 } while (0) 29 30 /* The following structure is used to hold the physical 31 * memory configuration of the machine. This is filled in 32 * prom_meminit() and is later used by mem_init() to set up 33 * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of 34 * these structs, this is arbitrary. The entry after the 35 * last valid one has num_bytes==0. 36 */ 37 struct sparc_phys_banks { 38 unsigned long base_addr; 39 unsigned long num_bytes; 40 }; 41 42 #define SPARC_PHYS_BANKS 32 43 44 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; 45 46 /* passing structs on the Sparc slow us down tremendously... */ 47 48 /* #define STRICT_MM_TYPECHECKS */ 49 50 #ifdef STRICT_MM_TYPECHECKS 51 /* 52 * These are used to make use of C type-checking.. 53 */ 54 typedef struct { unsigned long pte; } pte_t; 55 typedef struct { unsigned long iopte; } iopte_t; 56 typedef struct { unsigned long pmdv[16]; } pmd_t; 57 typedef struct { unsigned long pgd; } pgd_t; 58 typedef struct { unsigned long ctxd; } ctxd_t; 59 typedef struct { unsigned long pgprot; } pgprot_t; 60 typedef struct { unsigned long iopgprot; } iopgprot_t; 61 62 #define pte_val(x) ((x).pte) 63 #define iopte_val(x) ((x).iopte) 64 #define pmd_val(x) ((x).pmdv[0]) 65 #define pgd_val(x) ((x).pgd) 66 #define ctxd_val(x) ((x).ctxd) 67 #define pgprot_val(x) ((x).pgprot) 68 #define iopgprot_val(x) ((x).iopgprot) 69 70 #define __pte(x) ((pte_t) { (x) } ) 71 #define __iopte(x) ((iopte_t) { (x) } ) 72 /* #define __pmd(x) ((pmd_t) { (x) } ) */ /* XXX procedure with loop */ 73 #define __pgd(x) ((pgd_t) { (x) } ) 74 #define __ctxd(x) ((ctxd_t) { (x) } ) 75 #define __pgprot(x) ((pgprot_t) { (x) } ) 76 #define __iopgprot(x) ((iopgprot_t) { (x) } ) 77 78 #else 79 /* 80 * .. while these make it easier on the compiler 81 */ 82 typedef unsigned long pte_t; 83 typedef unsigned long iopte_t; 84 typedef struct { unsigned long pmdv[16]; } pmd_t; 85 typedef unsigned long pgd_t; 86 typedef unsigned long ctxd_t; 87 typedef unsigned long pgprot_t; 88 typedef unsigned long iopgprot_t; 89 90 #define pte_val(x) (x) 91 #define iopte_val(x) (x) 92 #define pmd_val(x) ((x).pmdv[0]) 93 #define pgd_val(x) (x) 94 #define ctxd_val(x) (x) 95 #define pgprot_val(x) (x) 96 #define iopgprot_val(x) (x) 97 98 #define __pte(x) (x) 99 #define __iopte(x) (x) 100 /* #define __pmd(x) (x) */ /* XXX later */ 101 #define __pgd(x) (x) 102 #define __ctxd(x) (x) 103 #define __pgprot(x) (x) 104 #define __iopgprot(x) (x) 105 106 #endif 107 108 typedef struct page *pgtable_t; 109 110 #define TASK_UNMAPPED_BASE 0x50000000 111 112 #else /* !(__ASSEMBLY__) */ 113 114 #define __pgprot(x) (x) 115 116 #endif /* !(__ASSEMBLY__) */ 117 118 #define PAGE_OFFSET 0xf0000000 119 #ifndef __ASSEMBLY__ 120 extern unsigned long phys_base; 121 extern unsigned long pfn_base; 122 #endif 123 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) 124 #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) 125 126 #define virt_to_phys __pa 127 #define phys_to_virt __va 128 129 #define ARCH_PFN_OFFSET (pfn_base) 130 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 131 132 #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) 133 #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) 134 135 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 136 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 137 138 #include <asm-generic/memory_model.h> 139 #include <asm-generic/getorder.h> 140 141 #endif /* _SPARC_PAGE_H */ 142