LXR linux/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 */
  42typedef unsigned long mm_context_id_t[NR_CPUS];
  43
  44typedef 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 */
  59bool __in_29bit_mode(void);
  60
  61void pmb_init(void);
  62int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  63                     unsigned long size, pgprot_t prot);
  64void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size,
  65                               pgprot_t prot, void *caller);
  66int pmb_unmap(void __iomem *addr);
  67
  68#else
  69
  70static inline int
  71pmb_bolt_mapping(unsigned long virt, phys_addr_t phys,
  72                 unsigned long size, pgprot_t prot)
  73{
  74        return -EINVAL;
  75}
  76
  77static inline void __iomem *
  78pmb_remap_caller(phys_addr_t phys, unsigned long size,
  79                 pgprot_t prot, void *caller)
  80{
  81        return NULL;
  82}
  83
  84static 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
  99static inline void __iomem *
 100pmb_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 */
 108