arch/csky/abiv1/inc/abi/pgtable-bits.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 #ifndef __ASM_CSKY_PGTABLE_BITS_H
   5 #define __ASM_CSKY_PGTABLE_BITS_H
   6
   7 /* implemented in software */
   8 #define _PAGE_ACCESSED          (1<<3)
   9 #define PAGE_ACCESSED_BIT       (3)
  10
  11 #define _PAGE_READ              (1<<1)
  12 #define _PAGE_WRITE             (1<<2)
  13 #define _PAGE_PRESENT           (1<<0)
  14
  15 #define _PAGE_MODIFIED          (1<<4)
  16 #define PAGE_MODIFIED_BIT       (4)
  17
  18 /* implemented in hardware */
  19 #define _PAGE_GLOBAL            (1<<6)
  20
  21 #define _PAGE_VALID             (1<<7)
  22 #define PAGE_VALID_BIT          (7)
  23
  24 #define _PAGE_DIRTY             (1<<8)
  25 #define PAGE_DIRTY_BIT          (8)
  26
  27 #define _PAGE_CACHE             (3<<9)
  28 #define _PAGE_UNCACHE           (2<<9)
  29 #define _PAGE_SO                _PAGE_UNCACHE
  30
  31 #define _CACHE_MASK             (7<<9)
  32
  33 #define _CACHE_CACHED           (_PAGE_VALID | _PAGE_CACHE)
  34 #define _CACHE_UNCACHED         (_PAGE_VALID | _PAGE_UNCACHE)
  35
  36 #define HAVE_ARCH_UNMAPPED_AREA
  37
  38 #endif /* __ASM_CSKY_PGTABLE_BITS_H */