sysctrl_asm.s revision 29949e866e40b95795203f3ee46f44a197c946e4
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2001 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/asm_linkage.h>
#include <sys/vtrace.h>
#include <sys/machthread.h>
#include <sys/clock.h>
#include <sys/asi.h>
#include <sys/fsr.h>
#include <sys/privregs.h>
#include <sys/pte.h>
#include <sys/mmu.h>
#include <sys/spitregs.h>
#if defined(lint)
#else /* lint */
#include "assym.h"
#endif /* lint */
#define TT_HSM 0x99
#if defined(lint)
void
sysctrl_freeze(void)
{}
#else /* lint */
/*
* This routine quiets a cpu and has it spin on a barrier.
* It is used during memory sparing so that no memory operation
* occurs during the memory copy.
*
* Entry:
* %g1 - gate array base address
* %g2 - barrier base address
* %g3 - arg2
* %g4 - arg3
*
* Register Usage:
* %g3 - saved pstate
* %g4 - temporary
* %g5 - check for panicstr
*/
ENTRY_NP(sysctrl_freeze)
CPU_INDEX(%g4, %g5)
sll %g4, 2, %g4
add %g4, %g1, %g4 ! compute address of gate id
st %g4, [%g4] ! indicate we are ready
membar #Sync
1:
sethi %hi(panicstr), %g5
ldn [%g5 + %lo(panicstr)], %g5
brnz %g5, 2f ! exit if in panic
nop
ld [%g2], %g4
brz,pt %g4, 1b ! spin until barrier true
nop
2:
retry
membar #Sync
SET_SIZE(sysctrl_freeze)
#endif /* lint */