release/src-rt-6.x/linux/linux-2.6/include/asm-sh/mmu.h

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