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/* Event-Based Branch Facility API. API implementation.
*
* Copyright IBM Corp. 2013
*
* The MIT License (MIT)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Contributors:
* IBM Corporation, Adhemerval Zanella - Initial implementation.
*/
#include <stdio.h>
#include "ebb-priv.h"
void
attribute_hidden
__paf_ebb_ebb_hook (void)
{
ebbhandler_t handler;
void *context;
spr_t val;
int flags;
uint32_t sample_period;
val = mfspr (BESCR);
if (!(val & BESCR_PMEO))
goto out;
handler = __paf_ebb_get_thread_handler ();
context = __paf_ebb_get_thread_context ();
handler (context);
out:
flags = __paf_ebb_get_thread_flags ();
if (flags & PAF_EBB_FLAGS_RESET_PMU)
{
/* 1) If requested, reset PMC to possible trigger another EBB */
uint32_t sample_period = __paf_ebb_get_thread_sample_period ();
reset_pmcs (sample_period);
}
/* 2) clear MMCR0[PMAO] - docs say BESCR[PMEO] should do this */
/* 3) set MMCR0[PMAE] - docs say BESCR[PME] should do this */
reset_mmcr0 ();
/* 4) clear BESCR[PMEO] */
mtspr (BESCRR, BESCR_PMEO);
/* 5) set BESCR[PME] */
mtspr (BESCRSU, BESCR_PMEU);
/* 6) rfebb 1 - done in ebb-callback*.S */
}
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