LXR linux/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 */
  41typedef unsigned long mm_context_id_t[NR_CPUS];
  42
  43typedef 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 */
  58bool __in_29bit_mode(void);
  59
  60void pmb_init(void);
  61int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  62                     unsigned long size, pgprot_t prot);
  63void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
  64                               pgprot_t prot, void *caller);
  65int pmb_unmap(void __iomem *addr);
  66
  67#else
  68
  69static inline int
  70pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  71                 unsigned long size, pgprot_t prot)
  72{
  73        return -EINVAL;
  74}
  75
  76static inline void __iomem *
  77pmb_remap_caller(phys_addr_t phys, unsigned long size,
  78                 pgprot_t prot, void *caller)
  79{
  80        return NULL;
  81}
  82
  83static 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
  98static inline void __iomem *
  99pmb_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 */
 107