mirror of https://github.com/dzavalishin/oskit/
44 lines
1.4 KiB
C
Executable File
44 lines
1.4 KiB
C
Executable File
/*
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* Copyright (c) 1996, 1998, 1999 University of Utah and the Flux Group.
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* All rights reserved.
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*
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* This file is part of the Flux OSKit. The OSKit is free software, also known
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* as "open source;" you can redistribute it and/or modify it under the terms
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* of the GNU General Public License (GPL), version 2, as published by the Free
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* Software Foundation (FSF). To explore alternate licensing terms, contact
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* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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*
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* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
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* received a copy of the GPL along with the OSKit; see the file COPYING. If
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* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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*/
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/*
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* Simple "global critical section" implementation for panic, debugging, etc.
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* This implementation is for uniprocessors; for multiprocessors,
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* the SMP startup code in libsmp.a overrides it with a different version.
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*/
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#include <oskit/arm32/proc_reg.h>
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static unsigned entry_count;
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static unsigned saved_cpsr;
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void base_critical_enter(void)
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{
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if (entry_count == 0) {
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saved_cpsr = get_cpsr();
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set_cpsr(saved_cpsr | PSR_I);
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}
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entry_count++;
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}
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void base_critical_leave(void)
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{
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if (--entry_count == 0) {
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set_cpsr(saved_cpsr);
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}
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}
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