/* * 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