freebsd-dev/sys/alpha/include/cpufunc.h
Andrew Gallatin 62dbd2f29e Block out all interrupts, even machine checks, for critical_enter()
This is will be required to prevent lowering the ipl when a critical_enter()
is present in the interrupt path when handling a machine check.

reviewed by: jhb
2001-04-21 21:44:39 +00:00

63 lines
1.8 KiB
C

/*-
* Copyright (c) 1998 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_CPUFUNC_H_
#define _MACHINE_CPUFUNC_H_
#ifdef _KERNEL
#include <sys/types.h>
#include <machine/chipset.h>
#include <machine/alpha_cpu.h>
#ifdef __GNUC__
static __inline void
breakpoint(void)
{
__asm __volatile("call_pal 0x81"); /* XXX bugchk */
}
#endif
static __inline critical_t
critical_enter(void)
{
return (alpha_pal_swpipl(ALPHA_PSL_IPL_MCES));
}
static __inline void
critical_exit(critical_t ipl)
{
alpha_pal_swpipl(ipl);
}
#endif /* _KERNEL */
#endif /* !_MACHINE_CPUFUNC_H_ */