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