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59 lines
1.5 KiB
59 lines
1.5 KiB
/* 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 <linux/pgtable.h> |
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#include <asm/page.h> |
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#ifdef CONFIG_MMU |
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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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FIX_PTE, |
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FIX_PMD, |
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FIX_TEXT_POKE1, |
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FIX_TEXT_POKE0, |
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FIX_EARLYCON_MEM_BASE, |
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__end_of_permanent_fixed_addresses, |
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/* |
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* Temporary boot-time mappings, used by early_ioremap(), |
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* before ioremap() is functional. |
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*/ |
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#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE) |
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#define FIX_BTMAPS_SLOTS 7 |
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#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS) |
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FIX_BTMAP_END = __end_of_permanent_fixed_addresses, |
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FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1, |
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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 /* CONFIG_MMU */ |
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#endif /* _ASM_RISCV_FIXMAP_H */
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