root/arch/sparc/mm/loadmmu.c

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DEFINITIONS

This source file includes following definitions.
  1. load_mmu

   1 /* loadmmu.c:  This code loads up all the mm function pointers once the
   2  *             machine type has been determined.  It also sets the static
   3  *             mmu values such as PAGE_NONE, etc.
   4  *
   5  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   6  */
   7 
   8 #include <asm/system.h>
   9 #include <asm/page.h>
  10 #include <asm/pgtable.h>
  11 
  12 void (*invalidate)(void);
  13 
  14 unsigned int pmd_shift, pmd_size, pmd_mask;
  15 unsigned int (*pmd_align)(unsigned int);
  16 unsigned int pgdir_shift, pgdir_size, pgdir_mask;
  17 unsigned int (*pgdir_align)(unsigned int);
  18 unsigned int ptrs_per_pte, ptrs_per_pmd, ptrs_per_pgd;
  19 
  20 pgprot_t page_none, page_shared, page_copy, page_readonly, page_kernel;
  21 pgprot_t page_invalid;
  22 
  23 /* Grrr... function pointers galore... */
  24 unsigned long (*pte_page)(pte_t);
  25 unsigned long (*pmd_page)(pmd_t);
  26 unsigned long (*pgd_page)(pgd_t);
  27 
  28 void (*sparc_update_rootmmu_dir)(struct task_struct *, pgd_t *pgdir);
  29 unsigned long (*(vmalloc_start))(void);
  30 void (*switch_to_context)(int);
  31 
  32 int (*pte_none)(pte_t);
  33 int (*pte_present)(pte_t);
  34 int (*pte_inuse)(pte_t *);
  35 void (*pte_clear)(pte_t *);
  36 void (*pte_reuse)(pte_t *);
  37 
  38 int (*pmd_none)(pmd_t);
  39 int (*pmd_bad)(pmd_t);
  40 int (*pmd_present)(pmd_t);
  41 int (*pmd_inuse)(pmd_t *);
  42 void (*pmd_clear)(pmd_t *);
  43 void (*pmd_reuse)(pmd_t *);
  44 
  45 int (*pgd_none)(pgd_t);
  46 int (*pgd_bad)(pgd_t);
  47 int (*pgd_present)(pgd_t);
  48 int (*pgd_inuse)(pgd_t *);
  49 void (*pgd_clear)(pgd_t *);
  50 void (*pgd_reuse)(pgd_t *);
  51 
  52 pte_t (*mk_pte)(unsigned long, pgprot_t);
  53 void (*pgd_set)(pgd_t *, pte_t *);
  54 pte_t (*pte_modify)(pte_t, pgprot_t);
  55 pgd_t * (*pgd_offset)(struct task_struct *, unsigned long);
  56 pmd_t * (*pmd_offset)(pgd_t *, unsigned long);
  57 pte_t * (*pte_offset)(pmd_t *, unsigned long);
  58 void (*pte_free_kernel)(pte_t *);
  59 pte_t * (*pte_alloc_kernel)(pmd_t *, unsigned long);
  60 
  61 void (*pmd_free_kernel)(pmd_t *);
  62 pmd_t * (*pmd_alloc_kernel)(pgd_t *, unsigned long);
  63 void (*pte_free)(pte_t *);
  64 pte_t * (*pte_alloc)(pmd_t *, unsigned long);
  65 
  66 void (*pmd_free)(pmd_t *);
  67 pmd_t * (*pmd_alloc)(pgd_t *, unsigned long);
  68 void (*pgd_free)(pgd_t *);
  69 
  70 pgd_t * (*pgd_alloc)(void);
  71 
  72 /*
  73  * The following only work if pte_present() is true.
  74  * Undefined behaviour if not..
  75  */
  76 int (*pte_read)(pte_t);
  77 int (*pte_write)(pte_t);
  78 int (*pte_exec)(pte_t);
  79 int (*pte_dirty)(pte_t);
  80 int (*pte_young)(pte_t);
  81 int (*pte_cow)(pte_t);
  82 
  83 pte_t (*pte_wrprotect)(pte_t);
  84 pte_t (*pte_rdprotect)(pte_t);
  85 pte_t (*pte_exprotect)(pte_t);
  86 pte_t (*pte_mkclean)(pte_t);
  87 pte_t (*pte_mkold)(pte_t);
  88 pte_t (*pte_uncow)(pte_t);
  89 pte_t (*pte_mkwrite)(pte_t);
  90 pte_t (*pte_mkread)(pte_t);
  91 pte_t (*pte_mkexec)(pte_t);
  92 pte_t (*pte_mkdirty)(pte_t);
  93 pte_t (*pte_mkyoung)(pte_t);
  94 pte_t (*pte_mkcow)(pte_t);
  95 
  96 extern void ld_mmu_sun4c(void);
  97 extern void ld_mmu_srmmu(void);
  98 
  99 void
 100 load_mmu(void)
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 101 {
 102         switch(sparc_cpu_model) {
 103         case sun4c:
 104                 ld_mmu_sun4c();
 105                 break;
 106         case sun4m:
 107         case sun4d:
 108         case sun4e:
 109                 ld_mmu_srmmu();
 110                 break;
 111         default:
 112                 printk("load_mmu:  MMU support not available for this architecture\n");
 113                 printk("load_mmu:  sparc_cpu_model = %d\n", (int) sparc_cpu_model);
 114                 printk("load_mmu:  Halting...\n");
 115                 halt();
 116         };
 117         return;
 118 }

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