4 #include <linux/const.h>
6 /* PAGE_SHIFT determines the page size */
8 #define PAGE_SHIFT (12)
10 #define PAGE_SHIFT (13)
12 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
13 #define PAGE_MASK (~(PAGE_SIZE-1))
15 #include <asm/setup.h>
18 #define THREAD_SIZE (8192)
20 #define THREAD_SIZE PAGE_SIZE
25 #include <linux/compiler.h>
27 #include <asm/module.h>
29 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
30 #define free_user_page(page, addr) free_page(addr)
33 * We don't need to check for alignment etc.
35 #ifdef CPU_M68040_OR_M68060_ONLY
36 static inline void copy_page(void *to, void *from)
40 __asm__ __volatile__("1:\t"
42 "move16 %1@+,%0@+\n\t"
43 "move16 %1@+,%0@+\n\t"
46 : "=a" (to), "=a" (from), "=d" (tmp)
47 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
51 static inline void clear_page(void *page)
54 unsigned long *sp = page;
61 __asm__ __volatile__("1:\t"
63 "move16 %2@+,%0@+\n\t"
68 : "=a" (sp), "=d" (tmp)
69 : "a" (page), "0" (sp),
70 "1" ((PAGE_SIZE - 16) / 16 - 1));
74 #define clear_page(page) memset((page), 0, PAGE_SIZE)
75 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
78 #define clear_user_page(addr, vaddr, page) \
79 do { clear_page(addr); \
80 flush_dcache_page(page); \
82 #define copy_user_page(to, from, vaddr, page) \
83 do { copy_page(to, from); \
84 flush_dcache_page(page); \
88 * These are used to make use of C type-checking..
90 typedef struct { unsigned long pte; } pte_t;
91 typedef struct { unsigned long pmd[16]; } pmd_t;
92 typedef struct { unsigned long pgd; } pgd_t;
93 typedef struct { unsigned long pgprot; } pgprot_t;
94 typedef struct page *pgtable_t;
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)
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) } )
106 #endif /* !__ASSEMBLY__ */
108 #include <asm/page_offset.h>
110 #define PAGE_OFFSET (PAGE_OFFSET_RAW)
114 extern unsigned long m68k_memoffset;
118 #define WANT_PAGE_VIRTUAL
120 static inline unsigned long ___pa(void *vaddr)
125 m68k_fixup(%c2, 1b+2)
127 : "0" (vaddr), "i" (m68k_fixup_memoffset));
130 #define __pa(vaddr) ___pa((void *)(vaddr))
131 static inline void *__va(unsigned long paddr)
136 m68k_fixup(%c2, 1b+2)
138 : "0" (paddr), "i" (m68k_fixup_memoffset));
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))
145 static inline unsigned long ___pa(unsigned long x)
150 return (x-PAGE_OFFSET);
152 return (x+0x2000000);
155 static inline void *__va(unsigned long x)
161 return (void *)(x+PAGE_OFFSET);
163 return (void *)(x-0x2000000);
165 #endif /* CONFIG_SUN3 */
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.
173 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
174 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
176 extern int m68k_virt_to_node_shift;
178 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
179 #define __virt_to_node(addr) (&pg_data_map[0])
181 extern struct pglist_data *pg_data_table[];
183 static inline __attribute_const__ int __virt_to_node_shift(void)
191 : "i" (m68k_fixup_vnode_shift));
195 #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
198 #define virt_to_page(addr) ({ \
199 pfn_to_page(virt_to_pfn(addr)); \
201 #define page_to_virt(page) ({ \
202 pfn_to_virt(page_to_pfn(page)); \
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); \
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; \
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))
221 #endif /* __ASSEMBLY__ */
223 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
224 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
226 #include <asm-generic/page.h>
228 #endif /* _M68K_PAGE_H */