include/linux/coresight-pmu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright(C) 2015 Linaro Limited. All rights reserved.
   4  * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
   5  */
   6
   7 #ifndef _LINUX_CORESIGHT_PMU_H
   8 #define _LINUX_CORESIGHT_PMU_H
   9
  10 #define CORESIGHT_ETM_PMU_NAME "cs_etm"
  11 #define CORESIGHT_ETM_PMU_SEED  0x10
  12
  13 /* ETMv3.5/PTM's ETMCR config bit */
  14 #define ETM_OPT_CYCACC  12
  15 #define ETM_OPT_CTXTID  14
  16 #define ETM_OPT_TS      28
  17 #define ETM_OPT_RETSTK  29
  18
  19 /* ETMv4 CONFIGR programming bits for the ETM OPTs */
  20 #define ETM4_CFG_BIT_CYCACC     4
  21 #define ETM4_CFG_BIT_CTXTID     6
  22 #define ETM4_CFG_BIT_TS         11
  23 #define ETM4_CFG_BIT_RETSTK     12
  24
  25 static inline int coresight_get_trace_id(int cpu)
  26 {
  27         /*
  28          * A trace ID of value 0 is invalid, so let's start at some
  29          * random value that fits in 7 bits and go from there.  Since
  30          * the common convention is to have data trace IDs be I(N) + 1,
  31          * set instruction trace IDs as a function of the CPU number.
  32          */
  33         return (CORESIGHT_ETM_PMU_SEED + (cpu * 2));
  34 }
  35
  36 #endif