include/asm-sparc64/page.h

   1 /* $Id: page.h,v 1.27 1999/07/31 00:07:25 davem Exp $ */
   2
   3 #ifndef _SPARC64_PAGE_H
   4 #define _SPARC64_PAGE_H
   5
   6 #define PAGE_SHIFT   13
   7 #ifndef __ASSEMBLY__
   8 /* I have my suspicions... -DaveM */
   9 #define PAGE_SIZE    (1UL << PAGE_SHIFT)
  10 #else
  11 #define PAGE_SIZE    (1 << PAGE_SHIFT)
  12 #endif
  13
  14 #define PAGE_MASK    (~(PAGE_SIZE-1))
  15
  16
  17 #ifdef __KERNEL__
  18
  19 #ifndef __ASSEMBLY__
  20
  21 #define BUG()           __builtin_trap()
  22 #define PAGE_BUG(page)  BUG()
  23
  24 extern void clear_page(unsigned long page);
  25 extern void copy_page(unsigned long to, unsigned long from);
  26
  27 /* GROSS, defining this makes gcc pass these types as aggregates,
  28  * and thus on the stack, turn this crap off... -DaveM
  29  */
  30
  31 /* #define STRICT_MM_TYPECHECKS */
  32
  33 #ifdef STRICT_MM_TYPECHECKS
  34 /* These are used to make use of C type-checking.. */
  35 typedef struct { unsigned long pte; } pte_t;
  36 typedef struct { unsigned long iopte; } iopte_t;
  37 typedef struct { unsigned int pmd; } pmd_t;
  38 typedef struct { unsigned int pgd; } pgd_t;
  39 typedef struct { unsigned long ctxd; } ctxd_t;
  40 typedef struct { unsigned long pgprot; } pgprot_t;
  41 typedef struct { unsigned long iopgprot; } iopgprot_t;
  42
  43 #define pte_val(x)      ((x).pte)
  44 #define iopte_val(x)    ((x).iopte)
  45 #define pmd_val(x)      ((unsigned long)(x).pmd)
  46 #define pgd_val(x)      ((unsigned long)(x).pgd)
  47 #define ctxd_val(x)     ((x).ctxd)
  48 #define pgprot_val(x)   ((x).pgprot)
  49 #define iopgprot_val(x) ((x).iopgprot)
  50
  51 #define __pte(x)        ((pte_t) { (x) } )
  52 #define __iopte(x)      ((iopte_t) { (x) } )
  53 #define __pmd(x)        ((pmd_t) { (x) } )
  54 #define __pgd(x)        ((pgd_t) { (x) } )
  55 #define __ctxd(x)       ((ctxd_t) { (x) } )
  56 #define __pgprot(x)     ((pgprot_t) { (x) } )
  57 #define __iopgprot(x)   ((iopgprot_t) { (x) } )
  58
  59 #else
  60 /* .. while these make it easier on the compiler */
  61 typedef unsigned long pte_t;
  62 typedef unsigned long iopte_t;
  63 typedef unsigned int pmd_t;
  64 typedef unsigned int pgd_t;
  65 typedef unsigned long ctxd_t;
  66 typedef unsigned long pgprot_t;
  67 typedef unsigned long iopgprot_t;
  68
  69 #define pte_val(x)      (x)
  70 #define iopte_val(x)    (x)
  71 #define pmd_val(x)      ((unsigned long)(x))
  72 #define pgd_val(x)      ((unsigned long)(x))
  73 #define ctxd_val(x)     (x)
  74 #define pgprot_val(x)   (x)
  75 #define iopgprot_val(x) (x)
  76
  77 #define __pte(x)        (x)
  78 #define __iopte(x)      (x)
  79 #define __pmd(x)        (x)
  80 #define __pgd(x)        (x)
  81 #define __ctxd(x)       (x)
  82 #define __pgprot(x)     (x)
  83 #define __iopgprot(x)   (x)
  84
  85 #endif /* (STRICT_MM_TYPECHECKS) */
  86
  87 #define TASK_UNMAPPED_BASE      ((current->thread.flags & SPARC_FLAG_32BIT) ? \
  88                                  (0x0000000070000000UL) : (PAGE_OFFSET))
  89
  90 #endif /* !(__ASSEMBLY__) */
  91
  92 /* to align the pointer to the (next) page boundary */
  93 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  94
  95 #ifndef __ASSEMBLY__
  96 /* Do prdele, look what happens to be in %g4... */
  97 register unsigned long page_offset asm("g4");
  98 #define PAGE_OFFSET             page_offset
  99 #else
 100 #define PAGE_OFFSET             0xFFFFF80000000000
 101 #endif
 102
 103 #define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)
 104 #define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
 105 #define MAP_NR(addr)            (__pa(addr) >> PAGE_SHIFT)
 106
 107 #ifndef __ASSEMBLY__
 108
 109 /* The following structure is used to hold the physical
 110  * memory configuration of the machine.  This is filled in
 111  * probe_memory() and is later used by mem_init() to set up
 112  * mem_map[].  We statically allocate SPARC_PHYS_BANKS of
 113  * these structs, this is arbitrary.  The entry after the
 114  * last valid one has num_bytes==0.
 115  */
 116
 117 struct sparc_phys_banks {
 118   unsigned long base_addr;
 119   unsigned long num_bytes;
 120 };
 121
 122 #define SPARC_PHYS_BANKS 32
 123
 124 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
 125
 126 #endif /* !(__ASSEMBLY__) */
 127
 128 #endif /* !(__KERNEL__) */
 129
 130 #endif /* !(_SPARC64_PAGE_H) */