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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
4 */
5
6#ifndef _ASM_RISCV_FIXMAP_H
7#define _ASM_RISCV_FIXMAP_H
8
9#include <linux/kernel.h>
10#include <linux/sizes.h>
11#include <asm/page.h>
12#include <asm/pgtable.h>
13
14#ifdef CONFIG_MMU
15/*
16 * Here we define all the compile-time 'special' virtual addresses.
17 * The point is to have a constant address at compile time, but to
18 * set the physical address only in the boot process.
19 *
20 * These 'compile-time allocated' memory buffers are page-sized. Use
21 * set_fixmap(idx,phys) to associate physical memory with fixmap indices.
22 */
23enum fixed_addresses {
24 FIX_HOLE,
25#define FIX_FDT_SIZE SZ_1M
26 FIX_FDT_END,
27 FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
28 FIX_PTE,
29 FIX_PMD,
30 FIX_EARLYCON_MEM_BASE,
31 __end_of_fixed_addresses
32};
33
34#define FIXMAP_PAGE_IO PAGE_KERNEL
35
36#define __early_set_fixmap __set_fixmap
37
38#define __late_set_fixmap __set_fixmap
39#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
40
41extern void __set_fixmap(enum fixed_addresses idx,
42 phys_addr_t phys, pgprot_t prot);
43
44#include <asm-generic/fixmap.h>
45
46#endif /* CONFIG_MMU */
47#endif /* _ASM_RISCV_FIXMAP_H */