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b423f94063
The AT32UC3A0512ES chip has a bug when disabling interrupts. As a workaround, two NOPs can be inserted. Signed-off-by: Gunnar Rangoy <gunnar@rangoy.com> Signed-off-by: Paul Driveklepp <pauldriveklepp@gmail.com> Signed-off-by: Olav Morken <olavmrk@gmail.com> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* Copyright (C) 2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/sysreg.h>
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void enable_interrupts(void)
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{
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asm volatile("csrf %0" : : "n"(SYSREG_GM_OFFSET));
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}
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int disable_interrupts(void)
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{
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unsigned long sr;
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sr = sysreg_read(SR);
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asm volatile("ssrf %0" : : "n"(SYSREG_GM_OFFSET));
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#ifdef CONFIG_AT32UC3A0xxx
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/* Two NOPs are required after masking interrupts on the
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* AT32UC3A0512ES. See errata 41.4.5.5. */
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asm("nop");
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asm("nop");
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#endif
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return !SYSREG_BFEXT(GM, sr);
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}
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