arch/loongarch/include/asm/pgtable-bits.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   4  */
   5 #ifndef _ASM_PGTABLE_BITS_H
   6 #define _ASM_PGTABLE_BITS_H
   7
   8 /* Page table bits */
   9 #define _PAGE_VALID_SHIFT       0
  10 #define _PAGE_ACCESSED_SHIFT    0  /* Reuse Valid for Accessed */
  11 #define _PAGE_DIRTY_SHIFT       1
  12 #define _PAGE_PLV_SHIFT         2  /* 2~3, two bits */
  13 #define _CACHE_SHIFT            4  /* 4~5, two bits */
  14 #define _PAGE_GLOBAL_SHIFT      6
  15 #define _PAGE_HUGE_SHIFT        6  /* HUGE is a PMD bit */
  16 #define _PAGE_PRESENT_SHIFT     7
  17 #define _PAGE_WRITE_SHIFT       8
  18 #define _PAGE_MODIFIED_SHIFT    9
  19 #define _PAGE_PROTNONE_SHIFT    10
  20 #define _PAGE_SPECIAL_SHIFT     11
  21 #define _PAGE_HGLOBAL_SHIFT     12 /* HGlobal is a PMD bit */
  22 #define _PAGE_PFN_SHIFT         12
  23 #define _PAGE_PFN_END_SHIFT     48
  24 #define _PAGE_NO_READ_SHIFT     61
  25 #define _PAGE_NO_EXEC_SHIFT     62
  26 #define _PAGE_RPLV_SHIFT        63
  27
  28 /* Used by software */
  29 #define _PAGE_PRESENT           (_ULCAST_(1) << _PAGE_PRESENT_SHIFT)
  30 #define _PAGE_WRITE             (_ULCAST_(1) << _PAGE_WRITE_SHIFT)
  31 #define _PAGE_ACCESSED          (_ULCAST_(1) << _PAGE_ACCESSED_SHIFT)
  32 #define _PAGE_MODIFIED          (_ULCAST_(1) << _PAGE_MODIFIED_SHIFT)
  33 #define _PAGE_PROTNONE          (_ULCAST_(1) << _PAGE_PROTNONE_SHIFT)
  34 #define _PAGE_SPECIAL           (_ULCAST_(1) << _PAGE_SPECIAL_SHIFT)
  35
  36 /* Used by TLB hardware (placed in EntryLo*) */
  37 #define _PAGE_VALID             (_ULCAST_(1) << _PAGE_VALID_SHIFT)
  38 #define _PAGE_DIRTY             (_ULCAST_(1) << _PAGE_DIRTY_SHIFT)
  39 #define _PAGE_PLV               (_ULCAST_(3) << _PAGE_PLV_SHIFT)
  40 #define _PAGE_GLOBAL            (_ULCAST_(1) << _PAGE_GLOBAL_SHIFT)
  41 #define _PAGE_HUGE              (_ULCAST_(1) << _PAGE_HUGE_SHIFT)
  42 #define _PAGE_HGLOBAL           (_ULCAST_(1) << _PAGE_HGLOBAL_SHIFT)
  43 #define _PAGE_NO_READ           (_ULCAST_(1) << _PAGE_NO_READ_SHIFT)
  44 #define _PAGE_NO_EXEC           (_ULCAST_(1) << _PAGE_NO_EXEC_SHIFT)
  45 #define _PAGE_RPLV              (_ULCAST_(1) << _PAGE_RPLV_SHIFT)
  46 #define _CACHE_MASK             (_ULCAST_(3) << _CACHE_SHIFT)
  47 #define _PFN_SHIFT              (PAGE_SHIFT - 12 + _PAGE_PFN_SHIFT)
  48
  49 #define _PAGE_USER      (PLV_USER << _PAGE_PLV_SHIFT)
  50 #define _PAGE_KERN      (PLV_KERN << _PAGE_PLV_SHIFT)
  51
  52 #define _PFN_MASK (~((_ULCAST_(1) << (_PFN_SHIFT)) - 1) & \
  53                   ((_ULCAST_(1) << (_PAGE_PFN_END_SHIFT)) - 1))
  54
  55 /*
  56  * Cache attributes
  57  */
  58 #ifndef _CACHE_SUC
  59 #define _CACHE_SUC                      (0<<_CACHE_SHIFT) /* Strong-ordered UnCached */
  60 #endif
  61 #ifndef _CACHE_CC
  62 #define _CACHE_CC                       (1<<_CACHE_SHIFT) /* Coherent Cached */
  63 #endif
  64 #ifndef _CACHE_WUC
  65 #define _CACHE_WUC                      (2<<_CACHE_SHIFT) /* Weak-ordered UnCached */
  66 #endif
  67
  68 #define __READABLE      (_PAGE_VALID)
  69 #define __WRITEABLE     (_PAGE_DIRTY | _PAGE_WRITE)
  70
  71 #define _PAGE_CHG_MASK  (_PAGE_MODIFIED | _PAGE_SPECIAL | _PFN_MASK | _CACHE_MASK | _PAGE_PLV)
  72 #define _HPAGE_CHG_MASK (_PAGE_MODIFIED | _PAGE_SPECIAL | _PFN_MASK | _CACHE_MASK | _PAGE_PLV | _PAGE_HUGE)
  73
  74 #define PAGE_NONE       __pgprot(_PAGE_PROTNONE | _PAGE_NO_READ | \
  75                                  _PAGE_USER | _CACHE_CC)
  76 #define PAGE_SHARED     __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \
  77                                  _PAGE_USER | _CACHE_CC)
  78 #define PAGE_READONLY   __pgprot(_PAGE_PRESENT | _PAGE_USER | _CACHE_CC)
  79
  80 #define PAGE_KERNEL     __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
  81                                  _PAGE_GLOBAL | _PAGE_KERN | _CACHE_CC)
  82 #define PAGE_KERNEL_SUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
  83                                  _PAGE_GLOBAL | _PAGE_KERN |  _CACHE_SUC)
  84 #define PAGE_KERNEL_WUC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
  85                                  _PAGE_GLOBAL | _PAGE_KERN |  _CACHE_WUC)
  86
  87 #define __P000 __pgprot(_CACHE_CC | _PAGE_USER | _PAGE_PROTNONE | _PAGE_NO_EXEC | _PAGE_NO_READ)
  88 #define __P001 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
  89 #define __P010 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
  90 #define __P011 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
  91 #define __P100 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
  92 #define __P101 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
  93 #define __P110 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
  94 #define __P111 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
  95
  96 #define __S000 __pgprot(_CACHE_CC | _PAGE_USER | _PAGE_PROTNONE | _PAGE_NO_EXEC | _PAGE_NO_READ)
  97 #define __S001 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC)
  98 #define __S010 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE)
  99 #define __S011 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_NO_EXEC | _PAGE_WRITE)
 100 #define __S100 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
 101 #define __S101 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT)
 102 #define __S110 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_WRITE)
 103 #define __S111 __pgprot(_CACHE_CC | _PAGE_VALID | _PAGE_USER | _PAGE_PRESENT | _PAGE_WRITE)
 104
 105 #ifndef __ASSEMBLY__
 106
 107 #define pgprot_noncached pgprot_noncached
 108
 109 static inline pgprot_t pgprot_noncached(pgprot_t _prot)
 110 {
 111         unsigned long prot = pgprot_val(_prot);
 112
 113         prot = (prot & ~_CACHE_MASK) | _CACHE_SUC;
 114
 115         return __pgprot(prot);
 116 }
 117
 118 #define pgprot_writecombine pgprot_writecombine
 119
 120 static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
 121 {
 122         unsigned long prot = pgprot_val(_prot);
 123
 124         prot = (prot & ~_CACHE_MASK) | _CACHE_WUC;
 125
 126         return __pgprot(prot);
 127 }
 128
 129 #endif /* !__ASSEMBLY__ */
 130
 131 #endif /* _ASM_PGTABLE_BITS_H */