1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
6 #ifndef _ASM_RISCV_FIXMAP_H
7 #define _ASM_RISCV_FIXMAP_H
9 #include <linux/kernel.h>
10 #include <linux/sizes.h>
12 #include <asm/pgtable.h>
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.
19 * These 'compile-time allocated' memory buffers are page-sized. Use
20 * set_fixmap(idx,phys) to associate physical memory with fixmap indices.
22 enum fixed_addresses {
24 #define FIX_FDT_SIZE SZ_1M
26 FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
29 FIX_EARLYCON_MEM_BASE,
30 __end_of_fixed_addresses
33 #define FIXMAP_PAGE_IO PAGE_KERNEL
35 #define __early_set_fixmap __set_fixmap
37 #define __late_set_fixmap __set_fixmap
38 #define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
40 extern void __set_fixmap(enum fixed_addresses idx,
41 phys_addr_t phys, pgprot_t prot);
43 #include <asm-generic/fixmap.h>
45 #endif /* _ASM_RISCV_FIXMAP_H */