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- /* $Id: page.h,v 1.2 2002/04/26 23:09:20 smilcke Exp $ */
-
- #ifndef _I386_PAGE_H
- #define _I386_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 <linux/config.h>
-
- /*
- * On older X86 processors its not a win to use MMX here it seems.
- * Maybe the K6-III ?
- */
-
- #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
- #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
-
- /*
- * These are used to make use of C type-checking..
- */
- #if CONFIG_X86_PAE
- typedef struct { unsigned long long pte; } pte_t;
- typedef struct { unsigned long long pmd; } pmd_t;
- typedef struct { unsigned long long pgd; } pgd_t;
- #else
- typedef struct { unsigned long pte; } pte_t;
- typedef struct { unsigned long pmd; } pmd_t;
- typedef struct { unsigned long pgd; } pgd_t;
- #endif
-
- #ifdef TARGET_OS2
- typedef unsigned long pgprot_t;
- #else
- typedef struct { unsigned long pgprot; } pgprot_t;
- #endif
-
- #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 __pgprot(x) ((pgprot_t) { (x) } )
-
- #endif /* !__ASSEMBLY__ */
-
- /* to align the pointer to the (next) page boundary */
- #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
- /*
- * This handles the memory map.. We could make this a config
- * option, but too many people screw it up, and too few need
- * it.
- *
- * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
- * a virtual address space of one gigabyte, which limits the
- * amount of physical memory you can use to about 950MB.
- *
- * If you want more physical memory than this then see the CONFIG_BIGMEM
- * option in the kernel configuration.
- */
-
- #define __PAGE_OFFSET (0xC0000000)
-
- #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
- #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
- #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
- #define MAP_NR(addr) (__pa(addr) >> PAGE_SHIFT)
- #define PHYSMAP_NR(addr) ((unsigned long)(addr) >> PAGE_SHIFT)
-
- #endif /* __KERNEL__ */
-
- #endif /* _I386_PAGE_H */
-