arch/xtensa/include/asm/fixmap.h

   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