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17534ceb83
TraceID values have to be unique for all tracers and consistent between drivers and user space. As such introducing a central function to be used whenever a traceID value is required. The patch also account for data traceIDs, which are usually I(N) + 1. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
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* Copyright(C) 2015 Linaro Limited. All rights reserved.
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* Author: Mathieu Poirier <mathieu.poirier@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _LINUX_CORESIGHT_PMU_H
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#define _LINUX_CORESIGHT_PMU_H
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#define CORESIGHT_ETM_PMU_NAME "cs_etm"
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#define CORESIGHT_ETM_PMU_SEED 0x10
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/* ETMv3.5/PTM's ETMCR config bit */
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#define ETM_OPT_CYCACC 12
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#define ETM_OPT_TS 28
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static inline int coresight_get_trace_id(int cpu)
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{
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/*
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* A trace ID of value 0 is invalid, so let's start at some
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* random value that fits in 7 bits and go from there. Since
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* the common convention is to have data trace IDs be I(N) + 1,
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* set instruction trace IDs as a function of the CPU number.
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*/
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return (CORESIGHT_ETM_PMU_SEED + (cpu * 2));
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}
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#endif
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