arch/sh/include/asm/mmu.h

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