39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
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/*
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* fixmap.h: compile-time virtual memory allocation
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1998 Ingo Molnar
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*
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* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
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*/
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#ifndef _ASM_FIXMAP_H
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#define _ASM_FIXMAP_H
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#ifdef CONFIG_HIGHMEM
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#include <linux/threads.h>
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#include <linux/pgtable.h>
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#include <asm/kmap_size.h>
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/* The map slots for temporary mappings via kmap_atomic/local(). */
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enum fixed_addresses {
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FIX_KMAP_BEGIN,
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FIX_KMAP_END = FIX_KMAP_BEGIN +
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(KM_MAX_IDX * NR_CPUS * DCACHE_N_COLORS) - 1,
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__end_of_fixed_addresses
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};
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#define FIXADDR_END (XCHAL_KSEG_CACHED_VADDR - PAGE_SIZE)
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#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
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/* Enforce that FIXADDR_START is PMD aligned to handle cache aliasing */
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#define FIXADDR_START ((FIXADDR_END - FIXADDR_SIZE) & PMD_MASK)
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#define FIXADDR_TOP (FIXADDR_START + FIXADDR_SIZE - PAGE_SIZE)
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#include <asm-generic/fixmap.h>
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#endif /* CONFIG_HIGHMEM */
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#endif
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