1#ifndef _M68K_PAGE_H 2#define _M68K_PAGE_H 3 4 5#ifdef __KERNEL__ 6 7/* PAGE_SHIFT determines the page size */ 8#ifndef CONFIG_SUN3 9#define PAGE_SHIFT (12) 10#else 11#define PAGE_SHIFT (13) 12#endif 13#ifdef __ASSEMBLY__ 14#define PAGE_SIZE (1 << PAGE_SHIFT) 15#else 16#define PAGE_SIZE (1UL << PAGE_SHIFT) 17#endif 18#define PAGE_MASK (~(PAGE_SIZE-1)) 19 20#include <asm/setup.h> 21 22#if PAGE_SHIFT < 13 23#define THREAD_SIZE (8192) 24#else 25#define THREAD_SIZE PAGE_SIZE 26#endif 27 28#ifndef __ASSEMBLY__ 29 30#include <asm/module.h> 31 32#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) 33#define free_user_page(page, addr) free_page(addr) 34 35/* 36 * We don't need to check for alignment etc. 37 */ 38#ifdef CPU_M68040_OR_M68060_ONLY 39static inline void copy_page(void *to, void *from) 40{ 41 unsigned long tmp; 42 43 __asm__ __volatile__("1:\t" 44 ".chip 68040\n\t" 45 "move16 %1@+,%0@+\n\t" 46 "move16 %1@+,%0@+\n\t" 47 ".chip 68k\n\t" 48 "dbra %2,1b\n\t" 49 : "=a" (to), "=a" (from), "=d" (tmp) 50 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) 51 ); 52} 53 54static inline void clear_page(void *page) 55{ 56 unsigned long tmp; 57 unsigned long *sp = page; 58 59 *sp++ = 0; 60 *sp++ = 0; 61 *sp++ = 0; 62 *sp++ = 0; 63 64 __asm__ __volatile__("1:\t" 65 ".chip 68040\n\t" 66 "move16 %2@+,%0@+\n\t" 67 ".chip 68k\n\t" 68 "subqw #8,%2\n\t" 69 "subqw #8,%2\n\t" 70 "dbra %1,1b\n\t" 71 : "=a" (sp), "=d" (tmp) 72 : "a" (page), "0" (sp), 73 "1" ((PAGE_SIZE - 16) / 16 - 1)); 74} 75 76#else 77#define clear_page(page) memset((page), 0, PAGE_SIZE) 78#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 79#endif 80 81#define clear_user_page(addr, vaddr, page) \ 82 do { clear_page(addr); \ 83 flush_dcache_page(page); \ 84 } while (0) 85#define copy_user_page(to, from, vaddr, page) \ 86 do { copy_page(to, from); \ 87 flush_dcache_page(page); \ 88 } while (0) 89 90/* 91 * These are used to make use of C type-checking.. 92 */ 93typedef struct { unsigned long pte; } pte_t; 94typedef struct { unsigned long pmd[16]; } pmd_t; 95typedef struct { unsigned long pgd; } pgd_t; 96typedef struct { unsigned long pgprot; } pgprot_t; 97 98#define pte_val(x) ((x).pte) 99#define pmd_val(x) ((&x)->pmd[0]) 100#define pgd_val(x) ((x).pgd) 101#define pgprot_val(x) ((x).pgprot) 102 103#define __pte(x) ((pte_t) { (x) } ) 104#define __pmd(x) ((pmd_t) { (x) } ) 105#define __pgd(x) ((pgd_t) { (x) } ) 106#define __pgprot(x) ((pgprot_t) { (x) } ) 107 108/* to align the pointer to the (next) page boundary */ 109#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) 110 111#endif /* !__ASSEMBLY__ */ 112 113#include <asm/page_offset.h> 114 115#define PAGE_OFFSET (PAGE_OFFSET_RAW) 116 117#ifndef __ASSEMBLY__ 118 119extern unsigned long m68k_memoffset; 120 121#ifndef CONFIG_SUN3 122 123#define WANT_PAGE_VIRTUAL 124 125static inline unsigned long ___pa(void *vaddr) 126{ 127 unsigned long paddr; 128 asm ( 129 "1: addl #0,%0\n" 130 m68k_fixup(%c2, 1b+2) 131 : "=r" (paddr) 132 : "0" (vaddr), "i" (m68k_fixup_memoffset)); 133 return paddr; 134} 135#define __pa(vaddr) ___pa((void *)(vaddr)) 136static inline void *__va(unsigned long paddr) 137{ 138 void *vaddr; 139 asm ( 140 "1: subl #0,%0\n" 141 m68k_fixup(%c2, 1b+2) 142 : "=r" (vaddr) 143 : "0" (paddr), "i" (m68k_fixup_memoffset)); 144 return vaddr; 145} 146 147#else /* !CONFIG_SUN3 */ 148/* This #define is a horrible hack to suppress lots of warnings. --m */ 149#define __pa(x) ___pa((unsigned long)(x)) 150static inline unsigned long ___pa(unsigned long x) 151{ 152 if(x == 0) 153 return 0; 154 if(x >= PAGE_OFFSET) 155 return (x-PAGE_OFFSET); 156 else 157 return (x+0x2000000); 158} 159 160static inline void *__va(unsigned long x) 161{ 162 if(x == 0) 163 return (void *)0; 164 165 if(x < 0x2000000) 166 return (void *)(x+PAGE_OFFSET); 167 else 168 return (void *)(x-0x2000000); 169} 170#endif /* CONFIG_SUN3 */ 171 172/* 173 * NOTE: virtual isn't really correct, actually it should be the offset into the 174 * memory node, but we have no highmem, so that works for now. 175 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots 176 * of the shifts unnecessary. 177 */ 178#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 179#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 180 181extern int m68k_virt_to_node_shift; 182 183#ifdef CONFIG_SINGLE_MEMORY_CHUNK 184#define __virt_to_node(addr) (&pg_data_map[0]) 185#else 186extern struct pglist_data *pg_data_table[]; 187 188static inline __attribute_const__ int __virt_to_node_shift(void) 189{ 190 int shift; 191 192 asm ( 193 "1: moveq #0,%0\n" 194 m68k_fixup(%c1, 1b) 195 : "=d" (shift) 196 : "i" (m68k_fixup_vnode_shift)); 197 return shift; 198} 199 200#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) 201#endif 202 203#define virt_to_page(addr) ({ \ 204 pfn_to_page(virt_to_pfn(addr)); \ 205}) 206#define page_to_virt(page) ({ \ 207 pfn_to_virt(page_to_pfn(page)); \ 208}) 209 210#define pfn_to_page(pfn) ({ \ 211 unsigned long __pfn = (pfn); \ 212 struct pglist_data *pgdat; \ 213 pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ 214 pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ 215}) 216#define page_to_pfn(_page) ({ \ 217 struct page *__p = (_page); \ 218 struct pglist_data *pgdat; \ 219 pgdat = &pg_data_map[page_to_nid(__p)]; \ 220 ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ 221}) 222 223#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) 224#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) 225 226#endif /* __ASSEMBLY__ */ 227 228#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 229 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 230 231#include <asm-generic/page.h> 232 233#endif /* __KERNEL__ */ 234 235#endif /* _M68K_PAGE_H */ 236