/* 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
#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 (3 << 8 ) /* Reserved for software */
#define _PAGE_SPECIAL (1 << 8 ) /* RSW: 0x1 */
#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_GLOBAL
/* Used for swap PTEs only. */
#define _PAGE_SWP_EXCLUSIVE _PAGE_ACCESSED
#define _PAGE_PFN_SHIFT 10
/*
* when all of R / W / X are zero , the PTE is a pointer to the next level
* of the page table ; otherwise , it is a leaf PTE .
*/
#define _PAGE_LEAF (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
#endif /* _ASM_RISCV_PGTABLE_BITS_H */
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