1 #ifndef __ASM_SH64_PAGE_H
2 #define __ASM_SH64_PAGE_H
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
9 * include/asm-sh64/page.h
11 * Copyright (C) 2000, 2001 Paolo Alberelli
12 * Copyright (C) 2003 Paul Mundt
14 * benedict.gaster@superh.com 19th, 24th July 2002.
16 * Modified to take account of enabling for D-CACHE support.
20 #include <linux/config.h>
22 /* PAGE_SHIFT determines the page size */
25 #define PAGE_SIZE 4096
27 #define PAGE_SIZE (1UL << PAGE_SHIFT)
29 #define PAGE_MASK (~(PAGE_SIZE-1))
30 #define PTE_MASK PAGE_MASK
35 extern void sh64_page_clear(void *page);
36 extern void sh64_page_copy(void *from, void *to);
38 #define clear_page(page) sh64_page_clear(page)
39 #define copy_page(to,from) sh64_page_copy(from, to)
41 #if defined(CONFIG_DCACHE_DISABLED)
43 #define clear_user_page(page, vaddr) clear_page(page)
44 #define copy_user_page(to, from, vaddr) copy_page(to, from)
48 extern void clear_user_page(void *to, unsigned long address);
49 extern void copy_user_page(void *to, void *from, unsigned long address);
51 #endif /* defined(CONFIG_DCACHE_DISABLED) */
54 * These are used to make use of C type-checking..
56 typedef struct { unsigned long long pte; } pte_t;
57 typedef struct { unsigned long pmd; } pmd_t;
58 typedef struct { unsigned long pgd; } pgd_t;
59 typedef struct { unsigned long pgprot; } pgprot_t;
61 #define pte_val(x) ((x).pte)
62 #define pmd_val(x) ((x).pmd)
63 #define pgd_val(x) ((x).pgd)
64 #define pgprot_val(x) ((x).pgprot)
66 #define __pte(x) ((pte_t) { (x) } )
67 #define __pmd(x) ((pmd_t) { (x) } )
68 #define __pgd(x) ((pgd_t) { (x) } )
69 #define __pgprot(x) ((pgprot_t) { (x) } )
71 #endif /* !__ASSEMBLY__ */
73 /* to align the pointer to the (next) page boundary */
74 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
79 #define __MEMORY_START (CONFIG_MEMORY_START)
80 #define PAGE_OFFSET (CONFIG_CACHED_MEMORY_OFFSET)
82 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
83 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
84 #define MAP_NR(addr) ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)
86 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
87 #define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
88 #define virt_to_page(kaddr) (mem_map + MAP_NR(kaddr))
89 #define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
96 * Tell the user there is some problem.
99 printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
100 asm volatile("nop"); \
103 #define PAGE_BUG(page) do { \
107 /* Pure 2^n version of get_order */
108 extern __inline__ int get_order(unsigned long size)
112 size = (size-1) >> (PAGE_SHIFT-1);
122 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
123 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
127 #endif /* __KERNEL__ */
129 #endif /* __ASM_SH64_PAGE_H */