mirror of https://github.com/dzavalishin/oskit/
77 lines
1.5 KiB
C
Executable File
77 lines
1.5 KiB
C
Executable File
/*
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* Copyright (c) 1996-2000 The University of Utah and the Flux Group.
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*
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* This file is part of the OSKit Linux Glue Libraries, which are free
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* software, also known as "open source;" you can redistribute them and/or
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* modify them under the terms of the GNU General Public License (GPL),
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* version 2, as published by the Free Software Foundation (FSF).
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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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#include "osenv.h"
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/*
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* XXX: x86-specific.
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*/
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#define IF_FLAG 0x00000200
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void
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linux_cli()
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{
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osenv_intr_disable();
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}
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void
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linux_sti()
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{
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osenv_intr_enable();
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}
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unsigned
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linux_save_flags()
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{
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unsigned rc;
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asm volatile("
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pushfl
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popl %0" : "=r" (rc));
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rc &= ~IF_FLAG;
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if (osenv_intr_enabled())
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rc |= IF_FLAG;
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return rc;
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}
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void
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linux_restore_flags(unsigned flags)
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{
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/*
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* XXX: Linux drivers only count on the interrupt enable bit
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* being properly restored.
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*/
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if (flags & IF_FLAG)
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osenv_intr_enable();
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else
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osenv_intr_disable();
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}
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unsigned
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linux_save_flags_cli()
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{
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unsigned rc;
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asm volatile("
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pushfl
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popl %0" : "=r" (rc));
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rc &= ~IF_FLAG;
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if (osenv_intr_save_disable())
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rc |= IF_FLAG;
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return rc;
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}
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