include/asm-sparc64/page.h

   1 /* $Id: page.h,v 1.24 1998/10/20 03:09:16 jj 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 extern void clear_page(unsigned long page);
  22 extern void copy_page(unsigned long to, unsigned long from);
  23
  24 /* GROSS, defining this makes gcc pass these types as aggregates,
  25  * and thus on the stack, turn this crap off... -DaveM
  26  */
  27
  28 /* #define STRICT_MM_TYPECHECKS */
  29
  30 #ifdef STRICT_MM_TYPECHECKS
  31 /* These are used to make use of C type-checking.. */
  32 typedef struct { unsigned long pte; } pte_t;
  33 typedef struct { unsigned long iopte; } iopte_t;
  34 typedef struct { unsigned int pmd; } pmd_t;
  35 typedef struct { unsigned int pgd; } pgd_t;
  36 typedef struct { unsigned long ctxd; } ctxd_t;
  37 typedef struct { unsigned long pgprot; } pgprot_t;
  38 typedef struct { unsigned long iopgprot; } iopgprot_t;
  39
  40 #define pte_val(x)      ((x).pte)
  41 #define iopte_val(x)    ((x).iopte)
  42 #define pmd_val(x)      ((unsigned long)(x).pmd)
  43 #define pgd_val(x)      ((unsigned long)(x).pgd)
  44 #define ctxd_val(x)     ((x).ctxd)
  45 #define pgprot_val(x)   ((x).pgprot)
  46 #define iopgprot_val(x) ((x).iopgprot)
  47
  48 #define __pte(x)        ((pte_t) { (x) } )
  49 #define __iopte(x)      ((iopte_t) { (x) } )
  50 #define __pmd(x)        ((pmd_t) { (x) } )
  51 #define __pgd(x)        ((pgd_t) { (x) } )
  52 #define __ctxd(x)       ((ctxd_t) { (x) } )
  53 #define __pgprot(x)     ((pgprot_t) { (x) } )
  54 #define __iopgprot(x)   ((iopgprot_t) { (x) } )
  55
  56 #else
  57 /* .. while these make it easier on the compiler */
  58 typedef unsigned long pte_t;
  59 typedef unsigned long iopte_t;
  60 typedef unsigned int pmd_t;
  61 typedef unsigned int pgd_t;
  62 typedef unsigned long ctxd_t;
  63 typedef unsigned long pgprot_t;
  64 typedef unsigned long iopgprot_t;
  65
  66 #define pte_val(x)      (x)
  67 #define iopte_val(x)    (x)
  68 #define pmd_val(x)      ((unsigned long)(x))
  69 #define pgd_val(x)      ((unsigned long)(x))
  70 #define ctxd_val(x)     (x)
  71 #define pgprot_val(x)   (x)
  72 #define iopgprot_val(x) (x)
  73
  74 #define __pte(x)        (x)
  75 #define __iopte(x)      (x)
  76 #define __pmd(x)        (x)
  77 #define __pgd(x)        (x)
  78 #define __ctxd(x)       (x)
  79 #define __pgprot(x)     (x)
  80 #define __iopgprot(x)   (x)
  81
  82 #endif /* (STRICT_MM_TYPECHECKS) */
  83
  84 #define TASK_UNMAPPED_BASE      ((current->tss.flags & SPARC_FLAG_32BIT) ? \
  85                                  (0x0000000070000000UL) : (PAGE_OFFSET))
  86
  87 #endif /* !(__ASSEMBLY__) */
  88
  89 /* to align the pointer to the (next) page boundary */
  90 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  91
  92 #ifndef __ASSEMBLY__
  93 /* Do prdele, look what happens to be in %g4... */
  94 register unsigned long page_offset asm("g4");
  95 #define PAGE_OFFSET             page_offset
  96 #else
  97 #define PAGE_OFFSET             0xFFFFF80000000000
  98 #endif
  99
 100 #define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)
 101 #define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
 102 #define MAP_NR(addr)            (__pa(addr) >> PAGE_SHIFT)
 103
 104 #ifndef __ASSEMBLY__
 105
 106 /* The following structure is used to hold the physical
 107  * memory configuration of the machine.  This is filled in
 108  * probe_memory() and is later used by mem_init() to set up
 109  * mem_map[].  We statically allocate SPARC_PHYS_BANKS of
 110  * these structs, this is arbitrary.  The entry after the
 111  * last valid one has num_bytes==0.
 112  */
 113
 114 struct sparc_phys_banks {
 115   unsigned long base_addr;
 116   unsigned long num_bytes;
 117 };
 118
 119 #define SPARC_PHYS_BANKS 32
 120
 121 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
 122
 123 #endif /* !(__ASSEMBLY__) */
 124
 125 #endif /* !(__KERNEL__) */
 126
 127 #endif /* !(_SPARC64_PAGE_H) */