i386/linux/linux-2.3.21/include/asm-ppc/page.h

   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 typedef struct { unsigned long pte; } pte_t;
  37 typedef struct { unsigned long pmd; } pmd_t;
  38 typedef struct { unsigned long pgd; } pgd_t;
  39 typedef struct { 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 typedef unsigned long pte_t;
  56 typedef unsigned long pmd_t;
  57 typedef unsigned long pgd_t;
  58 typedef unsigned 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 extern void clear_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 static inline unsigned long ___pa(unsigned long v)
  84 {
  85         unsigned long p;
  86         asm volatile ("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 static inline void* ___va(unsigned long p)
  97 {
  98         unsigned long v;
  99         asm volatile ("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 extern unsigned long get_zero_page_fast(void);
 116 #endif /* __KERNEL__ */
 117 #endif /* __ASSEMBLY__ */
 118 #endif /* _PPC_PAGE_H */