1#ifndef _M68K_PAGE_H 2#define _M68K_PAGE_H 3 4#include <linux/const.h> 5 6/* PAGE_SHIFT determines the page size */ 7#ifndef CONFIG_SUN3 8#define PAGE_SHIFT (12) 9#else 10#define PAGE_SHIFT (13) 11#endif 12#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 13#define PAGE_MASK (~(PAGE_SIZE-1)) 14 15#include <asm/setup.h> 16 17#if PAGE_SHIFT < 13 18#define THREAD_SIZE (8192) 19#else 20#define THREAD_SIZE PAGE_SIZE 21#endif 22 23#ifndef __ASSEMBLY__ 24 25#include <linux/compiler.h> 26 27#include <asm/module.h> 28 29#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) 30#define free_user_page(page, addr) free_page(addr) 31 32/* 33 * We don't need to check for alignment etc. 34 */ 35#ifdef CPU_M68040_OR_M68060_ONLY 36static inline void copy_page(void *to, void *from) 37{ 38 unsigned long tmp; 39 40 __asm__ __volatile__("1:\t" 41 ".chip 68040\n\t" 42 "move16 %1@+,%0@+\n\t" 43 "move16 %1@+,%0@+\n\t" 44 ".chip 68k\n\t" 45 "dbra %2,1b\n\t" 46 : "=a" (to), "=a" (from), "=d" (tmp) 47 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) 48 ); 49} 50 51static inline void clear_page(void *page) 52{ 53 unsigned long tmp; 54 unsigned long *sp = page; 55 56 *sp++ = 0; 57 *sp++ = 0; 58 *sp++ = 0; 59 *sp++ = 0; 60 61 __asm__ __volatile__("1:\t" 62 ".chip 68040\n\t" 63 "move16 %2@+,%0@+\n\t" 64 ".chip 68k\n\t" 65 "subqw #8,%2\n\t" 66 "subqw #8,%2\n\t" 67 "dbra %1,1b\n\t" 68 : "=a" (sp), "=d" (tmp) 69 : "a" (page), "0" (sp), 70 "1" ((PAGE_SIZE - 16) / 16 - 1)); 71} 72 73#else 74#define clear_page(page) memset((page), 0, PAGE_SIZE) 75#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 76#endif 77 78#define clear_user_page(addr, vaddr, page) \ 79 do { clear_page(addr); \ 80 flush_dcache_page(page); \ 81 } while (0) 82#define copy_user_page(to, from, vaddr, page) \ 83 do { copy_page(to, from); \ 84 flush_dcache_page(page); \ 85 } while (0) 86 87/* 88 * These are used to make use of C type-checking.. 89 */ 90typedef struct { unsigned long pte; } pte_t; 91typedef struct { unsigned long pmd[16]; } pmd_t; 92typedef struct { unsigned long pgd; } pgd_t; 93typedef struct { unsigned long pgprot; } pgprot_t; 94typedef struct page *pgtable_t; 95 96#define pte_val(x) ((x).pte) 97#define pmd_val(x) ((&x)->pmd[0]) 98#define pgd_val(x) ((x).pgd) 99#define pgprot_val(x) ((x).pgprot) 100 101#define __pte(x) ((pte_t) { (x) } ) 102#define __pmd(x) ((pmd_t) { (x) } ) 103#define __pgd(x) ((pgd_t) { (x) } ) 104#define __pgprot(x) ((pgprot_t) { (x) } ) 105 106#endif /* !__ASSEMBLY__ */ 107 108#include <asm/page_offset.h> 109 110#define PAGE_OFFSET (PAGE_OFFSET_RAW) 111 112#ifndef __ASSEMBLY__ 113 114extern unsigned long m68k_memoffset; 115 116#ifndef CONFIG_SUN3 117 118#define WANT_PAGE_VIRTUAL 119 120static inline unsigned long ___pa(void *vaddr) 121{ 122 unsigned long paddr; 123 asm ( 124 "1: addl #0,%0\n" 125 m68k_fixup(%c2, 1b+2) 126 : "=r" (paddr) 127 : "0" (vaddr), "i" (m68k_fixup_memoffset)); 128 return paddr; 129} 130#define __pa(vaddr) ___pa((void *)(vaddr)) 131static inline void *__va(unsigned long paddr) 132{ 133 void *vaddr; 134 asm ( 135 "1: subl #0,%0\n" 136 m68k_fixup(%c2, 1b+2) 137 : "=r" (vaddr) 138 : "0" (paddr), "i" (m68k_fixup_memoffset)); 139 return vaddr; 140} 141 142#else /* !CONFIG_SUN3 */ 143/* This #define is a horrible hack to suppress lots of warnings. --m */ 144#define __pa(x) ___pa((unsigned long)(x)) 145static inline unsigned long ___pa(unsigned long x) 146{ 147 if(x == 0) 148 return 0; 149 if(x >= PAGE_OFFSET) 150 return (x-PAGE_OFFSET); 151 else 152 return (x+0x2000000); 153} 154 155static inline void *__va(unsigned long x) 156{ 157 if(x == 0) 158 return (void *)0; 159 160 if(x < 0x2000000) 161 return (void *)(x+PAGE_OFFSET); 162 else 163 return (void *)(x-0x2000000); 164} 165#endif /* CONFIG_SUN3 */ 166 167/* 168 * NOTE: virtual isn't really correct, actually it should be the offset into the 169 * memory node, but we have no highmem, so that works for now. 170 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots 171 * of the shifts unnecessary. 172 */ 173#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 174#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 175 176extern int m68k_virt_to_node_shift; 177 178#ifdef CONFIG_SINGLE_MEMORY_CHUNK 179#define __virt_to_node(addr) (&pg_data_map[0]) 180#else 181extern struct pglist_data *pg_data_table[]; 182 183static inline __attribute_const__ int __virt_to_node_shift(void) 184{ 185 int shift; 186 187 asm ( 188 "1: moveq #0,%0\n" 189 m68k_fixup(%c1, 1b) 190 : "=d" (shift) 191 : "i" (m68k_fixup_vnode_shift)); 192 return shift; 193} 194 195#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) 196#endif 197 198#define virt_to_page(addr) ({ \ 199 pfn_to_page(virt_to_pfn(addr)); \ 200}) 201#define page_to_virt(page) ({ \ 202 pfn_to_virt(page_to_pfn(page)); \ 203}) 204 205#define pfn_to_page(pfn) ({ \ 206 unsigned long __pfn = (pfn); \ 207 struct pglist_data *pgdat; \ 208 pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ 209 pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ 210}) 211#define page_to_pfn(_page) ({ \ 212 struct page *__p = (_page); \ 213 struct pglist_data *pgdat; \ 214 pgdat = &pg_data_map[page_to_nid(__p)]; \ 215 ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ 216}) 217 218#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) 219#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) 220 221#endif /* __ASSEMBLY__ */ 222 223#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 224 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 225 226#include <asm-generic/getorder.h> 227 228#endif /* _M68K_PAGE_H */ 229