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Annotation of Gnu-Mach/linux/src/include/asm-i386/page.h, revision 1.1

1.1     ! root        1: #ifndef _I386_PAGE_H
        !             2: #define _I386_PAGE_H
        !             3: 
        !             4: /* PAGE_SHIFT determines the page size */
        !             5: #define PAGE_SHIFT     12
        !             6: #define PAGE_SIZE      (1UL << PAGE_SHIFT)
        !             7: #define PAGE_MASK      (~(PAGE_SIZE-1))
        !             8: 
        !             9: #ifdef __KERNEL__
        !            10: 
        !            11: #define STRICT_MM_TYPECHECKS
        !            12: 
        !            13: #ifdef STRICT_MM_TYPECHECKS
        !            14: /*
        !            15:  * These are used to make use of C type-checking..
        !            16:  */
        !            17: typedef struct { unsigned long pte; } pte_t;
        !            18: typedef struct { unsigned long pmd; } pmd_t;
        !            19: typedef struct { unsigned long pgd; } pgd_t;
        !            20: typedef struct { unsigned long pgprot; } pgprot_t;
        !            21: 
        !            22: #define pte_val(x)     ((x).pte)
        !            23: #define pmd_val(x)     ((x).pmd)
        !            24: #define pgd_val(x)     ((x).pgd)
        !            25: #define pgprot_val(x)  ((x).pgprot)
        !            26: 
        !            27: #define __pte(x)       ((pte_t) { (x) } )
        !            28: #define __pmd(x)       ((pmd_t) { (x) } )
        !            29: #define __pgd(x)       ((pgd_t) { (x) } )
        !            30: #define __pgprot(x)    ((pgprot_t) { (x) } )
        !            31: 
        !            32: #else
        !            33: /*
        !            34:  * .. while these make it easier on the compiler
        !            35:  */
        !            36: typedef unsigned long pte_t;
        !            37: typedef unsigned long pmd_t;
        !            38: typedef unsigned long pgd_t;
        !            39: typedef unsigned long pgprot_t;
        !            40: 
        !            41: #define pte_val(x)     (x)
        !            42: #define pmd_val(x)     (x)
        !            43: #define pgd_val(x)     (x)
        !            44: #define pgprot_val(x)  (x)
        !            45: 
        !            46: #define __pte(x)       (x)
        !            47: #define __pmd(x)       (x)
        !            48: #define __pgd(x)       (x)
        !            49: #define __pgprot(x)    (x)
        !            50: 
        !            51: #endif
        !            52: 
        !            53: /* to align the pointer to the (next) page boundary */
        !            54: #define PAGE_ALIGN(addr)       (((addr)+PAGE_SIZE-1)&PAGE_MASK)
        !            55: 
        !            56: /* This handles the memory map.. */
        !            57: #define PAGE_OFFSET            0
        !            58: #define MAP_NR(addr)           (((unsigned long)(addr)) >> PAGE_SHIFT)
        !            59: 
        !            60: #endif /* __KERNEL__ */
        !            61: 
        !            62: #endif /* _I386_PAGE_H */

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