4 #include <linux/config.h>
6 /* PAGE_SHIFT determines the page size */
8 #define PAGE_SHIFT (12)
10 #define PAGE_SHIFT (13)
13 #define PAGE_SIZE (1 << PAGE_SHIFT)
15 #define PAGE_SIZE (1UL << PAGE_SHIFT)
17 #define PAGE_MASK (~(PAGE_SIZE-1))
21 #include <asm/setup.h>
24 #define THREAD_SIZE (8192)
26 #define THREAD_SIZE PAGE_SIZE
31 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
32 #define free_user_page(page, addr) free_page(addr)
35 * We don't need to check for alignment etc.
37 #ifdef CPU_M68040_OR_M68060_ONLY
38 static inline void copy_page(void *to, void *from)
42 __asm__ __volatile__("1:\t"
44 "move16 %1@+,%0@+\n\t"
45 "move16 %1@+,%0@+\n\t"
48 : "=a" (to), "=a" (from), "=d" (tmp)
49 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
53 static inline void clear_page(void *page)
55 unsigned long data, tmp;
60 *((unsigned long *)(page))++ = 0;
61 *((unsigned long *)(page))++ = 0;
62 *((unsigned long *)(page))++ = 0;
63 *((unsigned long *)(page))++ = 0;
65 __asm__ __volatile__("1:\t"
67 "move16 %2@+,%0@+\n\t"
72 : "=a" (page), "=d" (tmp)
73 : "a" (sp), "0" (page),
74 "1" ((PAGE_SIZE - 16) / 16 - 1));
78 #define clear_page(page) memset((page), 0, PAGE_SIZE)
79 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
82 #define clear_user_page(addr, vaddr, page) \
83 do { clear_page(addr); \
84 flush_dcache_page(page); \
86 #define copy_user_page(to, from, vaddr, page) \
87 do { copy_page(to, from); \
88 flush_dcache_page(page); \
92 * These are used to make use of C type-checking..
94 typedef struct { unsigned long pte; } pte_t;
95 typedef struct { unsigned long pmd[16]; } pmd_t;
96 typedef struct { unsigned long pgd; } pgd_t;
97 typedef struct { unsigned long pgprot; } pgprot_t;
99 #define pte_val(x) ((x).pte)
100 #define pmd_val(x) ((&x)->pmd[0])
101 #define pgd_val(x) ((x).pgd)
102 #define pgprot_val(x) ((x).pgprot)
104 #define __pte(x) ((pte_t) { (x) } )
105 #define __pmd(x) ((pmd_t) { (x) } )
106 #define __pgd(x) ((pgd_t) { (x) } )
107 #define __pgprot(x) ((pgprot_t) { (x) } )
109 /* to align the pointer to the (next) page boundary */
110 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
112 /* Pure 2^n version of get_order */
113 static inline int get_order(unsigned long size)
117 size = (size-1) >> (PAGE_SHIFT-1);
126 #endif /* !__ASSEMBLY__ */
128 #include <asm/page_offset.h>
130 #define PAGE_OFFSET (PAGE_OFFSET_RAW)
136 #define WANT_PAGE_VIRTUAL
137 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
138 extern unsigned long m68k_memoffset;
140 #define __pa(vaddr) ((unsigned long)(vaddr)+m68k_memoffset)
141 #define __va(paddr) ((void *)((unsigned long)(paddr)-m68k_memoffset))
143 #define __pa(vaddr) virt_to_phys((void *)vaddr)
144 #define __va(paddr) phys_to_virt((unsigned long)paddr)
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)
150 static inline unsigned long ___pa(unsigned long x)
155 return (x-PAGE_OFFSET);
157 return (x+0x2000000);
160 static inline void *__va(unsigned long x)
166 return (void *)(x+PAGE_OFFSET);
168 return (void *)(x-0x2000000);
170 #endif /* CONFIG_SUN3 */
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.
178 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
179 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
181 #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT))
182 #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
184 #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
185 #define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
187 #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
188 #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
190 #endif /* __ASSEMBLY__ */
192 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
193 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
195 #endif /* __KERNEL__ */
197 #endif /* _M68K_PAGE_H */