include/linux/coresight-pmu.h

   1 /*
   2  * Copyright(C) 2015 Linaro Limited. All rights reserved.
   3  * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _LINUX_CORESIGHT_PMU_H
  19 #define _LINUX_CORESIGHT_PMU_H
  20
  21 #define CORESIGHT_ETM_PMU_NAME "cs_etm"
  22 #define CORESIGHT_ETM_PMU_SEED  0x10
  23
  24 /* ETMv3.5/PTM's ETMCR config bit */
  25 #define ETM_OPT_CYCACC  12
  26 #define ETM_OPT_TS      28
  27 #define ETM_OPT_RETSTK  29
  28
  29 /* ETMv4 CONFIGR programming bits for the ETM OPTs */
  30 #define ETM4_CFG_BIT_CYCACC     4
  31 #define ETM4_CFG_BIT_TS         11
  32 #define ETM4_CFG_BIT_RETSTK     12
  33
  34 static inline int coresight_get_trace_id(int cpu)
  35 {
  36         /*
  37          * A trace ID of value 0 is invalid, so let's start at some
  38          * random value that fits in 7 bits and go from there.  Since
  39          * the common convention is to have data trace IDs be I(N) + 1,
  40          * set instruction trace IDs as a function of the CPU number.
  41          */
  42         return (CORESIGHT_ETM_PMU_SEED + (cpu * 2));
  43 }
  44
  45 #endif