page.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- #ifndef _PARISC_PAGE_H
- #define _PARISC_PAGE_H
- /* PAGE_SHIFT determines the page size */
- #define PAGE_SHIFT 12
- #define PAGE_SIZE (1UL << PAGE_SHIFT)
- #define PAGE_MASK (~(PAGE_SIZE-1))
- #ifdef __KERNEL__
- #ifndef __ASSEMBLY__
- #include <asm/cache.h>
- #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
- #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
- extern void purge_kernel_dcache_page(unsigned long);
- extern void copy_user_page_asm(void *to, void *from);
- extern void clear_user_page_asm(void *page, unsigned long vaddr);
- static inline void
- copy_user_page(void *to, void *from, unsigned long vaddr)
- {
- copy_user_page_asm(to, from);
- flush_kernel_dcache_page(to);
- }
- static inline void
- clear_user_page(void *page, unsigned long vaddr)
- {
- purge_kernel_dcache_page((unsigned long)page);
- clear_user_page_asm(page, vaddr);
- }
- /*
- * These are used to make use of C type-checking..
- */
- typedef struct { unsigned long pte; } pte_t;
- typedef struct { unsigned long pmd; } pmd_t;
- typedef struct { unsigned long pgd; } pgd_t;
- typedef struct { unsigned long pgprot; } pgprot_t;
- #define pte_val(x) ((x).pte)
- #define pmd_val(x) ((x).pmd)
- #define pgd_val(x) ((x).pgd)
- #define pgprot_val(x) ((x).pgprot)
- #define __pte(x) ((pte_t) { (x) } )
- #define __pmd(x) ((pmd_t) { (x) } )
- #define __pgd(x) ((pgd_t) { (x) } )
- #define __pgprot(x) ((pgprot_t) { (x) } )
- /* Pure 2^n version of get_order */
- extern __inline__ int get_order(unsigned long size)
- {
- int order;
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
- }
- #ifdef __LP64__
- #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
- #else
- #define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */
- #endif
- typedef struct __physmem_range {
- unsigned long start_pfn;
- unsigned long pages; /* PAGE_SIZE pages */
- } physmem_range_t;
- extern physmem_range_t pmem_ranges[];
- extern int npmem_ranges;
- #endif /* !__ASSEMBLY__ */
- /* to align the pointer to the (next) page boundary */
- #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
- /*
- * Tell the user there is some problem. Beep too, so we can
- * see^H^H^Hhear bugs in early bootup as well!
- *
- * We don't beep yet. prumpf
- */
- #define BUG() do {
- printk("kernel BUG at %s:%d!n", __FILE__, __LINE__);
- } while (0)
- #define PAGE_BUG(page) do {
- BUG();
- } while (0)
- #define LINUX_GATEWAY_SPACE 0
- #define __PAGE_OFFSET (0x10000000)
- #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
- /* These macros don't work for 64-bit C code -- don't allow in C at all */
- #ifdef __ASSEMBLY__
- # define PA(x) ((x)-__PAGE_OFFSET)
- # define VA(x) ((x)+__PAGE_OFFSET)
- #endif
- #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
- #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
- #ifndef CONFIG_DISCONTIGMEM
- #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
- #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
- #endif /* !CONFIG_DISCONTIGMEM */
- #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC |
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
- #endif /* __KERNEL__ */
- #endif /* _PARISC_PAGE_H */