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Diffstat (limited to 'arch/xtensa/include/asm/fixmap.h')
| -rw-r--r-- | arch/xtensa/include/asm/fixmap.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/fixmap.h b/arch/xtensa/include/asm/fixmap.h new file mode 100644 index 000000000..1c65dc1d3 --- /dev/null +++ b/arch/xtensa/include/asm/fixmap.h @@ -0,0 +1,38 @@ +/* + * fixmap.h: compile-time virtual memory allocation + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1998 Ingo Molnar + * + * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 + */ + +#ifndef _ASM_FIXMAP_H +#define _ASM_FIXMAP_H + +#ifdef CONFIG_HIGHMEM +#include <linux/threads.h> +#include <linux/pgtable.h> +#include <asm/kmap_size.h> + +/* The map slots for temporary mappings via kmap_atomic/local(). */ +enum fixed_addresses { + FIX_KMAP_BEGIN, + FIX_KMAP_END = FIX_KMAP_BEGIN + + (KM_MAX_IDX * NR_CPUS * DCACHE_N_COLORS) - 1, + __end_of_fixed_addresses +}; + +#define FIXADDR_END (XCHAL_KSEG_CACHED_VADDR - PAGE_SIZE) +#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) +/* Enforce that FIXADDR_START is PMD aligned to handle cache aliasing */ +#define FIXADDR_START ((FIXADDR_END - FIXADDR_SIZE) & PMD_MASK) +#define FIXADDR_TOP (FIXADDR_START + FIXADDR_SIZE - PAGE_SIZE) + +#include <asm-generic/fixmap.h> + +#endif /* CONFIG_HIGHMEM */ +#endif |