lib_avr32/interrupts.c

   1 /*
   2  * Copyright (C) 2006 Atmel Corporation
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22 #include <common.h>
  23
  24 #include <asm/sysreg.h>
  25
  26 void enable_interrupts(void)
  27 {
  28         asm volatile("csrf      %0" : : "n"(SYSREG_GM_OFFSET));
  29 }
  30
  31 int disable_interrupts(void)
  32 {
  33         unsigned long sr;
  34
  35         sr = sysreg_read(SR);
  36         asm volatile("ssrf      %0" : : "n"(SYSREG_GM_OFFSET));
  37
  38         return SYSREG_BFEXT(GM, sr);
  39 }