4 #include <linux/config.h>
6 /* PAGE_SHIFT determines the page size */
8 #define PAGE_SHIFT (12)
9 #define PAGE_SIZE (1UL << PAGE_SHIFT)
10 #define PAGE_MASK (~(PAGE_SIZE-1))
14 #include <asm/setup.h>
16 #if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
17 #define KTHREAD_SIZE (8192)
19 #define KTHREAD_SIZE PAGE_SIZE
24 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
25 #define free_user_page(page, addr) free_page(addr)
27 #define clear_page(page) memset((page), 0, PAGE_SIZE)
28 #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
30 #define clear_user_page(page, vaddr, pg) clear_page(page)
31 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
33 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
34 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
37 * These are used to make use of C type-checking..
39 typedef struct { unsigned long pte; } pte_t;
40 typedef struct { unsigned long pmd[16]; } pmd_t;
41 typedef struct { unsigned long pgd; } pgd_t;
42 typedef struct { unsigned long pgprot; } pgprot_t;
44 #define pte_val(x) ((x).pte)
45 #define pmd_val(x) ((&x)->pmd[0])
46 #define pgd_val(x) ((x).pgd)
47 #define pgprot_val(x) ((x).pgprot)
49 #define __pte(x) ((pte_t) { (x) } )
50 #define __pmd(x) ((pmd_t) { (x) } )
51 #define __pgd(x) ((pgd_t) { (x) } )
52 #define __pgprot(x) ((pgprot_t) { (x) } )
54 /* to align the pointer to the (next) page boundary */
55 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
57 /* Pure 2^n version of get_order */
58 extern __inline__ int get_order(unsigned long size)
62 size = (size-1) >> (PAGE_SHIFT-1);
71 extern unsigned long memory_start;
72 extern unsigned long memory_end;
74 #endif /* !__ASSEMBLY__ */
76 #include <asm/page_offset.h>
78 #define PAGE_OFFSET (PAGE_OFFSET_RAW)
82 #define __pa(vaddr) virt_to_phys(vaddr)
83 #define __va(paddr) phys_to_virt((unsigned long)paddr)
85 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
86 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
88 #define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
89 #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
90 #define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
91 #define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
92 #define pfn_valid(page) (page < max_mapnr)
94 #define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
95 #define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
97 #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
98 ((void *)(kaddr) < (void *)memory_end))
100 #endif /* __ASSEMBLY__ */
102 #endif /* __KERNEL__ */
104 #endif /* _H8300_PAGE_H */