include/asm-ppc/page.h

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 1 #include <linux/config.h>
 2
 3 #ifndef _PPC_PAGE_H
 4 #define _PPC_PAGE_H
 5
 6 /* PAGE_SHIFT determines the page size */
 7 #define PAGE_SHIFT 12
 8 #define PAGE_SIZE (1UL << PAGE_SHIFT)
 9 #define PAGE_MASK (~(PAGE_SIZE-1))
 10
 11 #define PAGE_OFFSET 0xc0000000
 12 #define KERNELBASE PAGE_OFFSET
 13
 14 #ifndef __ASSEMBLY__
 15 #ifdef __KERNEL__
 16
 17 #ifdef CONFIG_XMON
 18 #define BUG() do { \
 19  printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
 20  xmon(0); \
 21 } while (0)
 22 #else
 23 #define BUG() do { \
 24  printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
 25  __asm__ __volatile__(".long 0x0"); \
 26 } while (0)
 27 #endif
 28 #define PAGE_BUG(page) do { BUG(); } while (0)
 29
 30 #define STRICT_MM_TYPECHECKS
 31
 32 #ifdef STRICT_MM_TYPECHECKS
 33 /*
 34  * These are used to make use of C type-checking..
 35  */
 36 typedefstruct{unsigned long pte; } pte_t;
 37 typedefstruct{unsigned long pmd; } pmd_t;
 38 typedefstruct{unsigned long pgd; } pgd_t;
 39 typedefstruct{unsigned long pgprot; } pgprot_t;
 40
 41 #define pte_val(x) ((x).pte)
 42 #define pmd_val(x) ((x).pmd)
 43 #define pgd_val(x) ((x).pgd)
 44 #define pgprot_val(x) ((x).pgprot)
 45
 46 #define __pte(x) ((pte_t) { (x) } )
 47 #define __pmd(x) ((pmd_t) { (x) } )
 48 #define __pgd(x) ((pgd_t) { (x) } )
 49 #define __pgprot(x) ((pgprot_t) { (x) } )
 50
 51 #else
 52 /*
 53  * .. while these make it easier on the compiler
 54  */
 55 typedefunsigned long pte_t;
 56 typedefunsigned long pmd_t;
 57 typedefunsigned long pgd_t;
 58 typedefunsigned long pgprot_t;
 59
 60 #define pte_val(x) (x)
 61 #define pmd_val(x) (x)
 62 #define pgd_val(x) (x)
 63 #define pgprot_val(x) (x)
 64
 65 #define __pte(x) (x)
 66 #define __pmd(x) (x)
 67 #define __pgd(x) (x)
 68 #define __pgprot(x) (x)
 69
 70 #endif
 71
 72
 73 /* align addr on a size boundry - adjust address up if needed -- Cort */
 74 #define _ALIGN(addr,size) (((addr)+size-1)&(~(size-1)))
 75
 76 /* to align the pointer to the (next) page boundary */
 77 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
 78
 79 externvoidclear_page(unsigned long page);
 80 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
 81
 82 /* map phys->virtual and virtual->phys for RAM pages */
 83 staticinlineunsigned long___pa(unsigned long v)
 84 {
 85 unsigned long p;
 86 asmvolatile("1: addis %0, %1, %2;"
 87 ".section\".vtop_fixup\",\"aw\";"
 88 ".align 1;"
 89 ".long 1b;"
 90 ".previous;"
 91 :"=r"(p)
 92 :"b"(v),"K"(((-PAGE_OFFSET) >>16) &0xffff));
 93
 94 return p;
 95 }
 96 staticinlinevoid*___va(unsigned long p)
 97 {
 98 unsigned long v;
 99 asmvolatile("1: addis %0, %1, %2;"
 100 ".section\".ptov_fixup\",\"aw\";"
 101 ".align 1;"
 102 ".long 1b;"
 103 ".previous;"
 104 :"=r"(v)
 105 :"b"(p),"K"(((PAGE_OFFSET) >>16) &0xffff));
 106
 107 return(void*) v;
 108 }
 109 #define __pa(x) ___pa ((unsigned long)(x))
 110 #define __va(x) ___va ((unsigned long)(x))
 111
 112 #define MAP_NR(addr) (((unsigned long)addr-PAGE_OFFSET) >> PAGE_SHIFT)
 113 #define MAP_PAGE_RESERVED (1<<15)
 114
 115 externunsigned longget_zero_page_fast(void);
 116 #endif/* __KERNEL__ */
 117 #endif/* __ASSEMBLY__ */
 118 #endif/* _PPC_PAGE_H */