arch/sparc/include/asm/page_32.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * page.h:  Various defines and such for MMU operations on the Sparc for
   4  *          the Linux kernel.
   5  *
   6  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   7  */
   8
   9 #ifndef _SPARC_PAGE_H
  10 #define _SPARC_PAGE_H
  11
  12 #include <linux/const.h>
  13
  14 #include <vdso/page.h>
  15
  16 #ifndef __ASSEMBLY__
  17
  18 #define clear_page(page)         memset((void *)(page), 0, PAGE_SIZE)
  19 #define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
  20 #define clear_user_page(addr, vaddr, page)      \
  21         do {    clear_page(addr);               \
  22                 sparc_flush_page_to_ram(page);  \
  23         } while (0)
  24 #define copy_user_page(to, from, vaddr, page)   \
  25         do {    copy_page(to, from);            \
  26                 sparc_flush_page_to_ram(page);  \
  27         } while (0)
  28
  29 /* The following structure is used to hold the physical
  30  * memory configuration of the machine.  This is filled in
  31  * prom_meminit() and is later used by mem_init() to set up
  32  * mem_map[].  We statically allocate SPARC_PHYS_BANKS+1 of
  33  * these structs, this is arbitrary.  The entry after the
  34  * last valid one has num_bytes==0.
  35  */
  36 struct sparc_phys_banks {
  37   unsigned long base_addr;
  38   unsigned long num_bytes;
  39 };
  40
  41 #define SPARC_PHYS_BANKS 32
  42
  43 extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
  44
  45 /* passing structs on the Sparc slow us down tremendously... */
  46
  47 /* #define STRICT_MM_TYPECHECKS */
  48
  49 #ifdef STRICT_MM_TYPECHECKS
  50 /*
  51  * These are used to make use of C type-checking..
  52  */
  53 typedef struct { unsigned long pte; } pte_t;
  54 typedef struct { unsigned long iopte; } iopte_t;
  55 typedef struct { unsigned long pmd; } pmd_t;
  56 typedef struct { unsigned long pgd; } pgd_t;
  57 typedef struct { unsigned long ctxd; } ctxd_t;
  58 typedef struct { unsigned long pgprot; } pgprot_t;
  59 typedef struct { unsigned long iopgprot; } iopgprot_t;
  60
  61 #define pte_val(x)      ((x).pte)
  62 #define iopte_val(x)    ((x).iopte)
  63 #define pmd_val(x)      ((x).pmd)
  64 #define pgd_val(x)      ((x).pgd)
  65 #define ctxd_val(x)     ((x).ctxd)
  66 #define pgprot_val(x)   ((x).pgprot)
  67 #define iopgprot_val(x) ((x).iopgprot)
  68
  69 #define __pte(x)        ((pte_t) { (x) } )
  70 #define __pmd(x)        ((pmd_t) { { (x) }, })
  71 #define __iopte(x)      ((iopte_t) { (x) } )
  72 #define __pgd(x)        ((pgd_t) { (x) } )
  73 #define __ctxd(x)       ((ctxd_t) { (x) } )
  74 #define __pgprot(x)     ((pgprot_t) { (x) } )
  75 #define __iopgprot(x)   ((iopgprot_t) { (x) } )
  76
  77 #else
  78 /*
  79  * .. while these make it easier on the compiler
  80  */
  81 typedef unsigned long pte_t;
  82 typedef unsigned long iopte_t;
  83 typedef unsigned long pmd_t;
  84 typedef unsigned long pgd_t;
  85 typedef unsigned long ctxd_t;
  86 typedef unsigned long pgprot_t;
  87 typedef unsigned long iopgprot_t;
  88
  89 #define pte_val(x)      (x)
  90 #define iopte_val(x)    (x)
  91 #define pmd_val(x)      (x)
  92 #define pgd_val(x)      (x)
  93 #define ctxd_val(x)     (x)
  94 #define pgprot_val(x)   (x)
  95 #define iopgprot_val(x) (x)
  96
  97 #define __pte(x)        (x)
  98 #define __pmd(x)        (x)
  99 #define __iopte(x)      (x)
 100 #define __pgd(x)        (x)
 101 #define __ctxd(x)       (x)
 102 #define __pgprot(x)     (x)
 103 #define __iopgprot(x)   (x)
 104
 105 #endif
 106
 107 typedef pte_t *pgtable_t;
 108
 109 #define TASK_UNMAPPED_BASE      0x50000000
 110
 111 #else /* !(__ASSEMBLY__) */
 112
 113 #define __pgprot(x)     (x)
 114
 115 #endif /* !(__ASSEMBLY__) */
 116
 117 #define PAGE_OFFSET     0xf0000000
 118 #ifndef __ASSEMBLY__
 119 extern unsigned long phys_base;
 120 extern unsigned long pfn_base;
 121 #endif
 122 #define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET + phys_base)
 123 #define __va(x)                 ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
 124
 125 #define virt_to_phys            __pa
 126 #define phys_to_virt            __va
 127
 128 #define ARCH_PFN_OFFSET         (pfn_base)
 129 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 130
 131 #define virt_addr_valid(kaddr)  ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
 132
 133 #include <asm-generic/memory_model.h>
 134 #include <asm-generic/getorder.h>
 135
 136 #endif /* _SPARC_PAGE_H */