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Annotation of Gnu-Mach/linux/src/include/asm-i386/page.h, revision 1.1.1.1

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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