arch/sh/include/asm/mmu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __MMU_H
   3 #define __MMU_H
   4
   5 /*
   6  * Privileged Space Mapping Buffer (PMB) definitions
   7  */
   8 #define PMB_PASCR               0xff000070
   9 #define PMB_IRMCR               0xff000078
  10
  11 #define PASCR_SE                0x80000000
  12
  13 #define PMB_ADDR                0xf6100000
  14 #define PMB_DATA                0xf7100000
  15
  16 #define NR_PMB_ENTRIES          16
  17
  18 #define PMB_E_MASK              0x0000000f
  19 #define PMB_E_SHIFT             8
  20
  21 #define PMB_PFN_MASK            0xff000000
  22
  23 #define PMB_SZ_16M              0x00000000
  24 #define PMB_SZ_64M              0x00000010
  25 #define PMB_SZ_128M             0x00000080
  26 #define PMB_SZ_512M             0x00000090
  27 #define PMB_SZ_MASK             PMB_SZ_512M
  28 #define PMB_C                   0x00000008
  29 #define PMB_WT                  0x00000001
  30 #define PMB_UB                  0x00000200
  31 #define PMB_CACHE_MASK          (PMB_C | PMB_WT | PMB_UB)
  32 #define PMB_V                   0x00000100
  33
  34 #define PMB_NO_ENTRY            (-1)
  35
  36 #ifndef __ASSEMBLY__
  37 #include <linux/errno.h>
  38 #include <linux/threads.h>
  39 #include <asm/page.h>
  40
  41 /* Default "unsigned long" context */
  42 typedef unsigned long mm_context_id_t[NR_CPUS];
  43
  44 typedef struct {
  45 #ifdef CONFIG_MMU
  46         mm_context_id_t         id;
  47         void                    *vdso;
  48 #else
  49         unsigned long           end_brk;
  50 #endif
  51 #ifdef CONFIG_BINFMT_ELF_FDPIC
  52         unsigned long           exec_fdpic_loadmap;
  53         unsigned long           interp_fdpic_loadmap;
  54 #endif
  55 } mm_context_t;
  56
  57 #ifdef CONFIG_PMB
  58 /* arch/sh/mm/pmb.c */
  59 bool __in_29bit_mode(void);
  60
  61 void pmb_init(void);
  62 int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  63                      unsigned long size, pgprot_t prot);
  64 void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
  65                                pgprot_t prot, void *caller);
  66 int pmb_unmap(void __iomem *addr);
  67
  68 #else
  69
  70 static inline int
  71 pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  72                  unsigned long size, pgprot_t prot)
  73 {
  74         return -EINVAL;
  75 }
  76
  77 static inline void __iomem *
  78 pmb_remap_caller(phys_addr_t phys, unsigned long size,
  79                  pgprot_t prot, void *caller)
  80 {
  81         return NULL;
  82 }
  83
  84 static inline int pmb_unmap(void __iomem *addr)
  85 {
  86         return -EINVAL;
  87 }
  88
  89 #define pmb_init(addr)          do { } while (0)
  90
  91 #ifdef CONFIG_29BIT
  92 #define __in_29bit_mode()       (1)
  93 #else
  94 #define __in_29bit_mode()       (0)
  95 #endif
  96
  97 #endif /* CONFIG_PMB */
  98
  99 static inline void __iomem *
 100 pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot)
 101 {
 102         return pmb_remap_caller(phys, size, prot, __builtin_return_address(0));
 103 }
 104
 105 #endif /* __ASSEMBLY__ */
 106
 107 #endif /* __MMU_H */