7 /* PAGE_SHIFT determines the page size */
9 #define PAGE_SHIFT (12)
11 #define PAGE_SHIFT (13)
14 #define PAGE_SIZE (1 << PAGE_SHIFT)
16 #define PAGE_SIZE (1UL << PAGE_SHIFT)
18 #define PAGE_MASK (~(PAGE_SIZE-1))
20 #include <asm/setup.h>
23 #define THREAD_SIZE (8192)
25 #define THREAD_SIZE PAGE_SIZE
30 #include <asm/module.h>
32 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
33 #define free_user_page(page, addr) free_page(addr)
36 * We don't need to check for alignment etc.
38 #ifdef CPU_M68040_OR_M68060_ONLY
39 static inline void copy_page(void *to, void *from)
43 __asm__ __volatile__("1:\t"
45 "move16 %1@+,%0@+\n\t"
46 "move16 %1@+,%0@+\n\t"
49 : "=a" (to), "=a" (from), "=d" (tmp)
50 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
54 static inline void clear_page(void *page)
57 unsigned long *sp = page;
64 __asm__ __volatile__("1:\t"
66 "move16 %2@+,%0@+\n\t"
71 : "=a" (sp), "=d" (tmp)
72 : "a" (page), "0" (sp),
73 "1" ((PAGE_SIZE - 16) / 16 - 1));
77 #define clear_page(page) memset((page), 0, PAGE_SIZE)
78 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
81 #define clear_user_page(addr, vaddr, page) \
82 do { clear_page(addr); \
83 flush_dcache_page(page); \
85 #define copy_user_page(to, from, vaddr, page) \
86 do { copy_page(to, from); \
87 flush_dcache_page(page); \
91 * These are used to make use of C type-checking..
93 typedef struct { unsigned long pte; } pte_t;
94 typedef struct { unsigned long pmd[16]; } pmd_t;
95 typedef struct { unsigned long pgd; } pgd_t;
96 typedef struct { unsigned long pgprot; } pgprot_t;
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)
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) } )
108 /* to align the pointer to the (next) page boundary */
109 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
111 #endif /* !__ASSEMBLY__ */
113 #include <asm/page_offset.h>
115 #define PAGE_OFFSET (PAGE_OFFSET_RAW)
119 extern unsigned long m68k_memoffset;
123 #define WANT_PAGE_VIRTUAL
124 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
126 static inline unsigned long ___pa(void *vaddr)
131 m68k_fixup(%c2, 1b+2)
133 : "0" (vaddr), "i" (m68k_fixup_memoffset));
136 #define __pa(vaddr) ___pa((void *)(vaddr))
137 static inline void *__va(unsigned long paddr)
142 m68k_fixup(%c2, 1b+2)
144 : "0" (paddr), "i" (m68k_fixup_memoffset));
149 #define __pa(vaddr) virt_to_phys((void *)(vaddr))
150 #define __va(paddr) phys_to_virt((unsigned long)(paddr))
153 #else /* !CONFIG_SUN3 */
154 /* This #define is a horrible hack to suppress lots of warnings. --m */
155 #define __pa(x) ___pa((unsigned long)(x))
156 static inline unsigned long ___pa(unsigned long x)
161 return (x-PAGE_OFFSET);
163 return (x+0x2000000);
166 static inline void *__va(unsigned long x)
172 return (void *)(x+PAGE_OFFSET);
174 return (void *)(x-0x2000000);
176 #endif /* CONFIG_SUN3 */
179 * NOTE: virtual isn't really correct, actually it should be the offset into the
180 * memory node, but we have no highmem, so that works for now.
181 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
182 * of the shifts unnecessary.
184 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
185 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
187 #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT))
188 #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
190 #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
191 #define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
193 #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
194 #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
196 #endif /* __ASSEMBLY__ */
198 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
199 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
201 #include <asm-generic/page.h>
203 #endif /* __KERNEL__ */
205 #endif /* _M68K_PAGE_H */