target/linux/ubicom32/files/arch/ubicom32/include/asm/range-protect.h

   1 /*
   2  * arch/ubicom32/include/asm/range-protect.h
   3  *   Assembly macros declared in C for enabling memory protection.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28
  29 #ifndef _ASM_UBICOM32_RANGE_PROTECT_H
  30 #define _ASM_UBICOM32_RANGE_PROTECT_H
  31
  32 #if !defined(__ASSEMBLY__)
  33 #include <asm/thread.h>
  34 /*
  35  * The following macros should be the identical to the ones in
  36  * range-protect-asm.h
  37  *
  38  * You should only use the enable/disable ranges when you have the atomic lock,
  39  * if you do not there will be problems.
  40  */
  41
  42 /*
  43  * enable_kernel_ranges
  44  *      Enable the kernel ranges (disabling protection) for thread,
  45  *      where thread == (1 << thread number)
  46  */
  47 asm (
  48         ".macro enable_kernel_ranges thread                     \n\t"
  49 #ifdef CONFIG_PROTECT_KERNEL
  50         "       or.4    I_RANGE0_EN, I_RANGE0_EN, \\thread      \n\t" /* Enable Range Register */
  51         "       or.4    D_RANGE0_EN, D_RANGE0_EN, \\thread      \n\t"
  52         "       or.4    D_RANGE1_EN, D_RANGE1_EN, \\thread      \n\t"
  53 #endif
  54         ".endm                                                  \n\t"
  55 );
  56
  57 #else /* __ASSEMBLY__ */
  58
  59 #include <asm/range-protect-asm.h>
  60
  61 #endif
  62 #endif  /* _ASM_UBICOM32_RANGE_PROTECT_H */