linux_dsm_epyc7002/arch/riscv/include/asm/pgtable-bits.h
Thomas Gleixner 50acfb2b76 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation version 2 this program is distributed
  in the hope that it will be useful but without any warranty without
  even the implied warranty of merchantability or fitness for a
  particular purpose see the gnu general public license for more
  details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 97 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.025053186@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00

44 lines
1.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Regents of the University of California
*/
#ifndef _ASM_RISCV_PGTABLE_BITS_H
#define _ASM_RISCV_PGTABLE_BITS_H
/*
* PTE format:
* | XLEN-1 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
* PFN reserved for SW D A G U X W R V
*/
#define _PAGE_ACCESSED_OFFSET 6
#define _PAGE_PRESENT (1 << 0)
#define _PAGE_READ (1 << 1) /* Readable */
#define _PAGE_WRITE (1 << 2) /* Writable */
#define _PAGE_EXEC (1 << 3) /* Executable */
#define _PAGE_USER (1 << 4) /* User */
#define _PAGE_GLOBAL (1 << 5) /* Global */
#define _PAGE_ACCESSED (1 << 6) /* Set by hardware on any access */
#define _PAGE_DIRTY (1 << 7) /* Set by hardware on any write */
#define _PAGE_SOFT (1 << 8) /* Reserved for software */
#define _PAGE_SPECIAL _PAGE_SOFT
#define _PAGE_TABLE _PAGE_PRESENT
/*
* _PAGE_PROT_NONE is set on not-present pages (and ignored by the hardware) to
* distinguish them from swapped out pages
*/
#define _PAGE_PROT_NONE _PAGE_READ
#define _PAGE_PFN_SHIFT 10
/* Set of bits to preserve across pte_modify() */
#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \
_PAGE_WRITE | _PAGE_EXEC | \
_PAGE_USER | _PAGE_GLOBAL))
#endif /* _ASM_RISCV_PGTABLE_BITS_H */