arch/arc/include/uapi/asm/page.h

   1 /*
   2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _UAPI__ASM_ARC_PAGE_H
  10 #define _UAPI__ASM_ARC_PAGE_H
  11
  12 /* PAGE_SHIFT determines the page size */
  13 #if defined(CONFIG_ARC_PAGE_SIZE_16K)
  14 #define PAGE_SHIFT 14
  15 #elif defined(CONFIG_ARC_PAGE_SIZE_4K)
  16 #define PAGE_SHIFT 12
  17 #else
  18 /*
  19  * Default 8k
  20  * done this way (instead of under CONFIG_ARC_PAGE_SIZE_8K) because adhoc
  21  * user code (busybox appletlib.h) expects PAGE_SHIFT to be defined w/o
  22  * using the correct uClibc header and in their build our autoconf.h is
  23  * not available
  24  */
  25 #define PAGE_SHIFT 13
  26 #endif
  27
  28 #ifdef __ASSEMBLY__
  29 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  30 #define PAGE_OFFSET     (0x80000000)
  31 #else
  32 #define PAGE_SIZE       (1UL << PAGE_SHIFT)     /* Default 8K */
  33 #define PAGE_OFFSET     (0x80000000UL)  /* Kernel starts at 2G onwards */
  34 #endif
  35
  36 #define PAGE_MASK       (~(PAGE_SIZE-1))
  37
  38
  39 #endif /* _UAPI__ASM_ARC_PAGE_H */