1 /* 2 * fixmap.h: compile-time virtual memory allocation 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 1998 Ingo Molnar 9 * 10 * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 11 */ 12 13 #ifndef _ASM_FIXMAP_H 14 #define _ASM_FIXMAP_H 15 16 #ifdef CONFIG_HIGHMEM 17 #include <linux/threads.h> 18 #include <linux/pgtable.h> 19 #include <asm/kmap_size.h> 20 21 /* The map slots for temporary mappings via kmap_atomic/local(). */ 22 enum fixed_addresses { 23 FIX_KMAP_BEGIN, 24 FIX_KMAP_END = FIX_KMAP_BEGIN + 25 (KM_MAX_IDX * NR_CPUS * DCACHE_N_COLORS) - 1, 26 __end_of_fixed_addresses 27 }; 28 29 #define FIXADDR_END (XCHAL_KSEG_CACHED_VADDR - PAGE_SIZE) 30 #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) 31 /* Enforce that FIXADDR_START is PMD aligned to handle cache aliasing */ 32 #define FIXADDR_START ((FIXADDR_END - FIXADDR_SIZE) & PMD_MASK) 33 #define FIXADDR_TOP (FIXADDR_START + FIXADDR_SIZE - PAGE_SIZE) 34 35 #include <asm-generic/fixmap.h> 36 37 #endif /* CONFIG_HIGHMEM */ 38 #endif 39