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 */ 43struct sparc_phys_banks { 44 unsigned long base_addr; 45 unsigned long num_bytes; 46}; 47 48#define SPARC_PHYS_BANKS 32 49 50extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; 51 52/* Cache alias structure. Entry is valid if context != -1. */ 53struct 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 */ 66typedef struct { unsigned long pte; } pte_t; 67typedef struct { unsigned long iopte; } iopte_t; 68typedef struct { unsigned long pmdv[16]; } pmd_t; 69typedef struct { unsigned long pgd; } pgd_t; 70typedef struct { unsigned long ctxd; } ctxd_t; 71typedef struct { unsigned long pgprot; } pgprot_t; 72typedef 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) } ) */ 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 */ 94typedef unsigned long pte_t; 95typedef unsigned long iopte_t; 96typedef struct { unsigned long pmdv[16]; } pmd_t; 97typedef unsigned long pgd_t; 98typedef unsigned long ctxd_t; 99typedef unsigned long pgprot_t; 100typedef 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) */ 113#define __pgd(x) (x) 114#define __ctxd(x) (x) 115#define __pgprot(x) (x) 116#define __iopgprot(x) (x) 117 118#endif 119 120typedef struct page *pgtable_t; 121 122extern unsigned long sparc_unmapped_base; 123 124BTFIXUPDEF_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__ 136extern unsigned long phys_base; 137extern 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