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
  15 #define NR_PMB_ENTRIES          16
  16
  17 #define PMB_E_MASK              0x0000000f
  18 #define PMB_E_SHIFT             8
  19
  20 #define PMB_PFN_MASK            0xff000000
  21
  22 #define PMB_SZ_16M              0x00000000
  23 #define PMB_SZ_64M              0x00000010
  24 #define PMB_SZ_128M             0x00000080
  25 #define PMB_SZ_512M             0x00000090
  26 #define PMB_SZ_MASK             PMB_SZ_512M
  27 #define PMB_C                   0x00000008
  28 #define PMB_WT                  0x00000001
  29 #define PMB_UB                  0x00000200
  30 #define PMB_CACHE_MASK          (PMB_C | PMB_WT | PMB_UB)
  31 #define PMB_V                   0x00000100
  32
  33 #define PMB_NO_ENTRY            (-1)
  34
  35 #ifndef __ASSEMBLY__
  36 #include <linux/errno.h>
  37 #include <linux/threads.h>
  38 #include <asm/page.h>
  39
  40 /* Default "unsigned long" context */
  41 typedef unsigned long mm_context_id_t[NR_CPUS];
  42
  43 typedef struct {
  44 #ifdef CONFIG_MMU
  45         mm_context_id_t         id;
  46         void                    *vdso;
  47 #else
  48         unsigned long           end_brk;
  49 #endif
  50 #ifdef CONFIG_BINFMT_ELF_FDPIC
  51         unsigned long           exec_fdpic_loadmap;
  52         unsigned long           interp_fdpic_loadmap;
  53 #endif
  54 } mm_context_t;
  55
  56 #ifdef CONFIG_PMB
  57 /* arch/sh/mm/pmb.c */
  58 bool __in_29bit_mode(void);
  59
  60 void pmb_init(void);
  61 int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  62                      unsigned long size, pgprot_t prot);
  63 void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
  64                                pgprot_t prot, void *caller);
  65 int pmb_unmap(void __iomem *addr);
  66
  67 #else
  68
  69 static inline int
  70 pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  71                  unsigned long size, pgprot_t prot)
  72 {
  73         return -EINVAL;
  74 }
  75
  76 static inline void __iomem *
  77 pmb_remap_caller(phys_addr_t phys, unsigned long size,
  78                  pgprot_t prot, void *caller)
  79 {
  80         return NULL;
  81 }
  82
  83 static inline int pmb_unmap(void __iomem *addr)
  84 {
  85         return -EINVAL;
  86 }
  87
  88 #define pmb_init(addr)          do { } while (0)
  89
  90 #ifdef CONFIG_29BIT
  91 #define __in_29bit_mode()       (1)
  92 #else
  93 #define __in_29bit_mode()       (0)
  94 #endif
  95
  96 #endif /* CONFIG_PMB */
  97
  98 static inline void __iomem *
  99 pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
 100 {
 101         return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
 102 }
 103
 104 #endif /* __ASSEMBLY__ */
 105
 106 #endif /* __MMU_H */