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 */ 37struct sparc_phys_banks { 38 unsigned long base_addr; 39 unsigned long num_bytes; 40}; 41 42#define SPARC_PHYS_BANKS 32 43 44extern 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 */ 54typedef struct { unsigned long pte; } pte_t; 55typedef struct { unsigned long iopte; } iopte_t; 56typedef struct { unsigned long pmdv[16]; } pmd_t; 57typedef struct { unsigned long pgd; } pgd_t; 58typedef struct { unsigned long ctxd; } ctxd_t; 59typedef struct { unsigned long pgprot; } pgprot_t; 60typedef 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 */ 82typedef unsigned long pte_t; 83typedef unsigned long iopte_t; 84typedef struct { unsigned long pmdv[16]; } pmd_t; 85typedef unsigned long pgd_t; 86typedef unsigned long ctxd_t; 87typedef unsigned long pgprot_t; 88typedef 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 108typedef 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__ 120extern unsigned long phys_base; 121extern 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