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