include/asm-sh/mmu.h

   1 #ifndef __MMU_H
   2 #define __MMU_H
   3
   4 #if !defined(CONFIG_MMU)
   5
   6 typedef struct {
   7         struct vm_list_struct   *vmlist;
   8         unsigned long           end_brk;
   9 } mm_context_t;
  10
  11 #else
  12
  13 /* Default "unsigned long" context */
  14 typedef unsigned long mm_context_id_t;
  15
  16 typedef struct {
  17         mm_context_id_t id;
  18         void *vdso;
  19 } mm_context_t;
  20
  21 #endif /* CONFIG_MMU */
  22
  23 /*
  24  * Privileged Space Mapping Buffer (PMB) definitions
  25  */
  26 #define PMB_PASCR               0xff000070
  27 #define PMB_IRMCR               0xff000078
  28
  29 #define PMB_ADDR                0xf6100000
  30 #define PMB_DATA                0xf7100000
  31 #define PMB_ENTRY_MAX           16
  32 #define PMB_E_MASK              0x0000000f
  33 #define PMB_E_SHIFT             8
  34
  35 #define PMB_SZ_16M              0x00000000
  36 #define PMB_SZ_64M              0x00000010
  37 #define PMB_SZ_128M             0x00000080
  38 #define PMB_SZ_512M             0x00000090
  39 #define PMB_SZ_MASK             PMB_SZ_512M
  40 #define PMB_C                   0x00000008
  41 #define PMB_WT                  0x00000001
  42 #define PMB_UB                  0x00000200
  43 #define PMB_V                   0x00000100
  44
  45 #define PMB_NO_ENTRY            (-1)
  46
  47 struct pmb_entry;
  48
  49 struct pmb_entry {
  50         unsigned long vpn;
  51         unsigned long ppn;
  52         unsigned long flags;
  53
  54         /*
  55          * 0 .. NR_PMB_ENTRIES for specific entry selection, or
  56          * PMB_NO_ENTRY to search for a free one
  57          */
  58         int entry;
  59
  60         struct pmb_entry *next;
  61         /* Adjacent entry link for contiguous multi-entry mappings */
  62         struct pmb_entry *link;
  63 };
  64
  65 /* arch/sh/mm/pmb.c */
  66 int __set_pmb_entry(unsigned long vpn, unsigned long ppn,
  67                     unsigned long flags, int *entry);
  68 int set_pmb_entry(struct pmb_entry *pmbe);
  69 void clear_pmb_entry(struct pmb_entry *pmbe);
  70 struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
  71                             unsigned long flags);
  72 void pmb_free(struct pmb_entry *pmbe);
  73 long pmb_remap(unsigned long virt, unsigned long phys,
  74                unsigned long size, unsigned long flags);
  75 void pmb_unmap(unsigned long addr);
  76
  77 #endif /* __MMU_H */
  78