67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_FIXMAP_H
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#define _ASM_FIXMAP_H
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#define FIXADDR_START 0xffc80000UL
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#define FIXADDR_END 0xfff00000UL
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#define FIXADDR_TOP (FIXADDR_END - PAGE_SIZE)
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#include <linux/pgtable.h>
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#include <asm/kmap_size.h>
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enum fixed_addresses {
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FIX_EARLYCON_MEM_BASE,
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__end_of_permanent_fixed_addresses,
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FIX_KMAP_BEGIN = __end_of_permanent_fixed_addresses,
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FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * NR_CPUS) - 1,
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/* Support writing RO kernel text via kprobes, jump labels, etc. */
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FIX_TEXT_POKE0,
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FIX_TEXT_POKE1,
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__end_of_fixmap_region,
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/*
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* Share the kmap() region with early_ioremap(): this is guaranteed
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* not to clash since early_ioremap() is only available before
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* paging_init(), and kmap() only after.
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*/
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#define NR_FIX_BTMAPS 32
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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_early_ioremap_region
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};
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static const enum fixed_addresses __end_of_fixed_addresses =
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__end_of_fixmap_region > __end_of_early_ioremap_region ?
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__end_of_fixmap_region : __end_of_early_ioremap_region;
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#define FIXMAP_PAGE_COMMON (L_PTE_YOUNG | L_PTE_PRESENT | L_PTE_XN | L_PTE_DIRTY)
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#define FIXMAP_PAGE_NORMAL (pgprot_kernel | L_PTE_XN)
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#define FIXMAP_PAGE_RO (FIXMAP_PAGE_NORMAL | L_PTE_RDONLY)
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/* Used by set_fixmap_(io|nocache), both meant for mapping a device */
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#define FIXMAP_PAGE_IO (FIXMAP_PAGE_COMMON | L_PTE_MT_DEV_SHARED | L_PTE_SHARED)
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#define FIXMAP_PAGE_NOCACHE FIXMAP_PAGE_IO
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#define __early_set_fixmap __set_fixmap
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#ifdef CONFIG_MMU
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void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot);
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void __init early_fixmap_init(void);
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#include <asm-generic/fixmap.h>
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#else
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static inline void early_fixmap_init(void) { }
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#endif
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#endif
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