1#ifndef __ASM_SH_PAGE_H 2#define __ASM_SH_PAGE_H 3 4/* 5 * Copyright (C) 1999 Niibe Yutaka 6 */ 7 8/* 9 [ P0/U0 (virtual) ] 0x00000000 <------ User space 10 [ P1 (fixed) cached ] 0x80000000 <------ Kernel space 11 [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access 12 [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area 13 [ P4 control ] 0xE0000000 14 */ 15 16#include <linux/config.h> 17 18/* PAGE_SHIFT determines the page size */ 19#define PAGE_SHIFT 12 20#define PAGE_SIZE (1UL << PAGE_SHIFT) 21#define PAGE_MASK (~(PAGE_SIZE-1)) 22#define PTE_MASK PAGE_MASK 23 24#ifdef __KERNEL__ 25#ifndef __ASSEMBLY__ 26 27extern void clear_page(void *to); 28extern void copy_page(void *to, void *from); 29 30#if defined(__sh3__) 31#define clear_user_page(page, vaddr) clear_page(page) 32#define copy_user_page(to, from, vaddr) copy_page(to, from) 33#elif defined(__SH4__) 34extern void clear_user_page(void *to, unsigned long address); 35extern void copy_user_page(void *to, void *from, unsigned long address); 36extern void __clear_user_page(void *to, void *orig_to); 37extern void __copy_user_page(void *to, void *from, void *orig_to); 38#endif 39 40/* 41 * These are used to make use of C type-checking.. 42 */ 43typedef struct { unsigned long pte; } pte_t; 44typedef struct { unsigned long pmd; } pmd_t; 45typedef struct { unsigned long pgd; } pgd_t; 46typedef struct { unsigned long pgprot; } pgprot_t; 47 48#define pte_val(x) ((x).pte) 49#define pmd_val(x) ((x).pmd) 50#define pgd_val(x) ((x).pgd) 51#define pgprot_val(x) ((x).pgprot) 52 53#define __pte(x) ((pte_t) { (x) } ) 54#define __pmd(x) ((pmd_t) { (x) } ) 55#define __pgd(x) ((pgd_t) { (x) } ) 56#define __pgprot(x) ((pgprot_t) { (x) } ) 57 58#endif /* !__ASSEMBLY__ */ 59 60/* to align the pointer to the (next) page boundary */ 61#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) 62 63/* 64 * IF YOU CHANGE THIS, PLEASE ALSO CHANGE 65 * 66 * arch/sh/vmlinux.lds.S 67 * 68 * which has the same constant encoded.. 69 */ 70 71#define __MEMORY_START CONFIG_MEMORY_START 72#define __MEMORY_SIZE CONFIG_MEMORY_SIZE 73#ifdef CONFIG_DISCONTIGMEM 74/* Just for HP690, for now.. */ 75#define __MEMORY_START_2ND (__MEMORY_START+0x02000000) 76#define __MEMORY_SIZE_2ND 0x001000000 /* 16MB */ 77#endif 78 79#define PAGE_OFFSET (0x80000000UL) 80#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) 81#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 82 83#ifndef CONFIG_DISCONTIGMEM 84#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT)) 85#define VALID_PAGE(page) ((page - mem_map) < max_mapnr) 86#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START) 87#endif 88 89#define virt_to_page(kaddr) phys_to_page(__pa(kaddr)) 90 91#ifndef __ASSEMBLY__ 92 93/* 94 * Tell the user there is some problem. 95 */ 96#define BUG() do { \ 97 printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ 98 asm volatile("nop"); \ 99} while (0) 100 101#define PAGE_BUG(page) do { \ 102 BUG(); \ 103} while (0) 104 105/* Pure 2^n version of get_order */ 106static __inline__ int get_order(unsigned long size) 107{ 108 int order; 109 110 size = (size-1) >> (PAGE_SHIFT-1); 111 order = -1; 112 do { 113 size >>= 1; 114 order++; 115 } while (size); 116 return order; 117} 118 119#endif 120 121#endif /* __KERNEL__ */ 122 123#endif /* __ASM_SH_PAGE_H */ 124