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 PASCR_SE                0x80000000
  11
  12 #define PMB_ADDR                0xf6100000
  13 #define PMB_DATA                0xf7100000
  14 #define PMB_ENTRY_MAX           16
  15 #define PMB_E_MASK              0x0000000f
  16 #define PMB_E_SHIFT             8
  17
  18 #define PMB_PFN_MASK            0xff000000
  19
  20 #define PMB_SZ_16M              0x00000000
  21 #define PMB_SZ_64M              0x00000010
  22 #define PMB_SZ_128M             0x00000080
  23 #define PMB_SZ_512M             0x00000090
  24 #define PMB_SZ_MASK             PMB_SZ_512M
  25 #define PMB_C                   0x00000008
  26 #define PMB_WT                  0x00000001
  27 #define PMB_UB                  0x00000200
  28 #define PMB_CACHE_MASK          (PMB_C | PMB_WT | PMB_UB)
  29 #define PMB_V                   0x00000100
  30
  31 #define PMB_NO_ENTRY            (-1)
  32
  33 #ifndef __ASSEMBLY__
  34 #include <linux/errno.h>
  35 #include <linux/threads.h>
  36
  37 /* Default "unsigned long" context */
  38 typedef unsigned long mm_context_id_t[NR_CPUS];
  39
  40 typedef struct {
  41 #ifdef CONFIG_MMU
  42         mm_context_id_t         id;
  43         void                    *vdso;
  44 #else
  45         unsigned long           end_brk;
  46 #endif
  47 #ifdef CONFIG_BINFMT_ELF_FDPIC
  48         unsigned long           exec_fdpic_loadmap;
  49         unsigned long           interp_fdpic_loadmap;
  50 #endif
  51 } mm_context_t;
  52
  53 struct pmb_entry;
  54
  55 struct pmb_entry {
  56         unsigned long vpn;
  57         unsigned long ppn;
  58         unsigned long flags;
  59
  60         /*
  61          * 0 .. NR_PMB_ENTRIES for specific entry selection, or
  62          * PMB_NO_ENTRY to search for a free one
  63          */
  64         int entry;
  65
  66         struct pmb_entry *next;
  67         /* Adjacent entry link for contiguous multi-entry mappings */
  68         struct pmb_entry *link;
  69 };
  70
  71 #ifdef CONFIG_PMB
  72 /* arch/sh/mm/pmb.c */
  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 int pmb_init(void);
  77 bool __in_29bit_mode(void);
  78 #else
  79 static inline long pmb_remap(unsigned long virt, unsigned long phys,
  80                              unsigned long size, unsigned long flags)
  81 {
  82         return -EINVAL;
  83 }
  84
  85 static inline void pmb_unmap(unsigned long addr)
  86 {
  87 }
  88
  89 static inline int pmb_init(void)
  90 {
  91         return -ENODEV;
  92 }
  93
  94 #ifdef CONFIG_29BIT
  95 #define __in_29bit_mode()       (1)
  96 #else
  97 #define __in_29bit_mode()       (0)
  98 #endif
  99
 100 #endif /* CONFIG_PMB */
 101 #endif /* __ASSEMBLY__ */
 102
 103 #endif /* __MMU_H */