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/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Generic x86 CPU MCA poller - support functions for native and xpv pollers.
*/
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/sdt.h>
#include <sys/cmn_err.h>
#include "gcpu.h"
uint_t gcpu_poll_trace_nent = 100;
#ifdef DEBUG
int gcpu_poll_trace_always = 1;
#else
int gcpu_poll_trace_always = 0;
#endif
void
gcpu_poll_trace(gcpu_poll_trace_ctl_t *ptc, uint8_t what, uint8_t nerr)
{
gcpu_poll_trace_t *pt;
uint_t next;
DTRACE_PROBE2(gcpu__mca__poll__trace, uint32_t, what, uint32_t, nerr);
if (ptc->mptc_tbufs == NULL)
return; /* poll trace buffer is disabled */
next = (ptc->mptc_curtrace + 1) % gcpu_poll_trace_nent;
pt = &ptc->mptc_tbufs[next];
pt->mpt_when = 0;
pt->mpt_what = what;
pt->mpt_nerr = MIN(nerr, UINT8_MAX);
pt->mpt_when = gethrtime_waitfree();
ptc->mptc_curtrace = next;
}
void
gcpu_poll_trace_init(gcpu_poll_trace_ctl_t *ptc)
{
gcpu_poll_trace_t *tbufs = NULL;
if (gcpu_poll_trace_always) {
tbufs = kmem_zalloc(sizeof (gcpu_poll_trace_t) *
gcpu_poll_trace_nent, KM_SLEEP);
}
ptc->mptc_tbufs = tbufs;
ptc->mptc_curtrace = 0;
}
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