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| author | Pasha <pasha@member.fsf.org> | 2024-02-20 18:55:36 +0000 |
|---|---|---|
| committer | Pasha <pasha@member.fsf.org> | 2024-02-20 18:55:36 +0000 |
| commit | 6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5 (patch) | |
| tree | 9f5ccbaa6ec19ff5a42d9b3cde01f739e1d7c77d /riscv/include/asm/pgtable-32.h | |
| parent | 5e0b8d508ed51004bd836384293be00950ee62c9 (diff) | |
| download | gnumach-riscv-6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5.tar.gz gnumach-riscv-6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5.tar.bz2 | |
Diffstat (limited to 'riscv/include/asm/pgtable-32.h')
| -rw-r--r-- | riscv/include/asm/pgtable-32.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/riscv/include/asm/pgtable-32.h b/riscv/include/asm/pgtable-32.h new file mode 100644 index 0000000..00f3369 --- /dev/null +++ b/riscv/include/asm/pgtable-32.h @@ -0,0 +1,39 @@ +/* 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 */ |