46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2019 Western Digital Corporation or its affiliates.
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*/
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#ifndef _ASM_RISCV_FIXMAP_H
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#define _ASM_RISCV_FIXMAP_H
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#include <linux/kernel.h>
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#include <linux/sizes.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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/*
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* Here we define all the compile-time 'special' virtual addresses.
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* The point is to have a constant address at compile time, but to
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* set the physical address only in the boot process.
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*
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* These 'compile-time allocated' memory buffers are page-sized. Use
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* set_fixmap(idx,phys) to associate physical memory with fixmap indices.
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*/
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enum fixed_addresses {
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FIX_HOLE,
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#define FIX_FDT_SIZE SZ_1M
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FIX_FDT_END,
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FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
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FIX_PTE,
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FIX_PMD,
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FIX_EARLYCON_MEM_BASE,
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__end_of_fixed_addresses
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};
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#define FIXMAP_PAGE_IO PAGE_KERNEL
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#define __early_set_fixmap __set_fixmap
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#define __late_set_fixmap __set_fixmap
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#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
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extern void __set_fixmap(enum fixed_addresses idx,
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phys_addr_t phys, pgprot_t prot);
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#include <asm-generic/fixmap.h>
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#endif /* _ASM_RISCV_FIXMAP_H */
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