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38 lines
1.1 KiB
38 lines
1.1 KiB
/* |
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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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