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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Regents of the University of California
*/
#ifndef _ASM_RISCV_PGTABLE_32_H
#define _ASM_RISCV_PGTABLE_32_H
#include <asm-generic/pgtable-nopmd.h>
#include <linux/bits.h>
#include <linux/const.h>
/* Size of region mapped by a page global directory */
#define PGDIR_SHIFT 22
#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
#define MAX_POSSIBLE_PHYSMEM_BITS 34
/*
* rv32 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_PFN_MASK GENMASK(31, 10)
#define _PAGE_NOCACHE 0
#define _PAGE_IO 0
#define _PAGE_MTMASK 0
/* 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_32_H */
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