Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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/*
15 * Here we define all the compile-time 'special' virtual addresses.
16 * The point is to have a constant address at compile time, but to
17 * set the physical address only in the boot process.
18 *
19 * These 'compile-time allocated' memory buffers are page-sized. Use
20 * set_fixmap(idx,phys) to associate physical memory with fixmap indices.
21 */
22enum fixed_addresses {
23 FIX_HOLE,
24#define FIX_FDT_SIZE SZ_1M
25 FIX_FDT_END,
26 FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
27 FIX_PTE,
28 FIX_PMD,
29 FIX_EARLYCON_MEM_BASE,
30 __end_of_fixed_addresses
31};
32
33#define FIXMAP_PAGE_IO PAGE_KERNEL
34
35#define __early_set_fixmap __set_fixmap
36
37#define __late_set_fixmap __set_fixmap
38#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
39
40extern void __set_fixmap(enum fixed_addresses idx,
41 phys_addr_t phys, pgprot_t prot);
42
43#include <asm-generic/fixmap.h>
44
45#endif /* _ASM_RISCV_FIXMAP_H */