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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)) static const __maybe_unused int pgtable_l4_enabled; static const __maybe_unused int pgtable_l5_enabled; #endif /* _ASM_RISCV_PGTABLE_32_H */