184 lines
6.1 KiB
C
184 lines
6.1 KiB
C
/*
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* Customer ID=11656; Build=0x5f626; Copyright (c) 2012 by Tensilica Inc. ALL RIGHTS RESERVED.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef __XT_PERFMON_H__
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#define __XT_PERFMON_H__
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#include <xtensa/config/core.h>
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#include <xtensa/xt_perf_consts.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef int counter_id_t;
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/* xt_perf_init
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Initialize the performance monitor library. Ordinarily, this
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function is called automatically via the .init section. If your
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environment does not support the .init section, you will need to
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call this function from your code.
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*/
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extern void xt_perf_init(void);
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/* xt_perf_enable
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Turn on the performance monitor. Ordinarily, counting is off by
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default. If you turn off performance monitor using xt_perf_disable or
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by call to a function that disables performance monitor, you can turn
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it on again via this function.
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*/
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extern void xt_perf_enable(void);
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/* xt_perf_disable
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Turn off the performance monitor. If you want to suspend counting
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events for a portion of your code, use this function and then call
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xt_perf_enable when you want to start again.
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*/
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extern void xt_perf_disable(void);
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/* xt_perf_clear
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Disable performance monitor and clear all initialized hardware counters.
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All counter ids are invalid after call to this function and all hardware
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counters available for initialization.
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*/
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extern void xt_perf_clear (void);
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/* xt_perf_counters_num
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Returns number of free hardware performance counters. After call to xt_perf_clear
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all counters are free and available for initialization. With each successful
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xt_perf_init_counter/xt_perf_init_event call this number is decreasing until
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no free counters available.
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*/
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extern int xt_perf_counters_num (void);
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/* xt_perf_init_counter32
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Setup 32 bit performance counter. This function disables performance monitor
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if it was enabled.
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Returns zero based counter id on success or negative value if failed.
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This function may fail if there is insufficient number of free hardware
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counters or function arguments are invalid.
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The counter id returned on success can be used with xt_perf_reset_counter
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and xt_perf_counter32 functions.
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<selector> - events group, one of XTPERF_CNT constants defined in
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xt_perf_consts.h;
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<mask> - events mask for selected group. Mask bit fields for each
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selector defined with XTPERF_MASK prefix in xt_perf_consts.h;
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<trace_level> - specifies interrupt levels at which to count events;
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if trace_level is greater or equal to zero events are
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counted only at interrupt levels below or equal to
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trace_level; if trace_level is negative events are
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counted only at (-trace_level) interrupt level or higher.
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*/
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extern counter_id_t xt_perf_init_counter32 ( unsigned int selector,
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unsigned int mask,
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int trace_level);
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/* xt_perf_init_counter64
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Setup 64 bit performance counter. Library emulates 64 bit counters by handling
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profiling interrupt and recording overflows of 32 bit hardware counters.
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This function disables performance monitor if it was enabled.
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Returns zero based counter id on success or negative value if failed.
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This function may fail if there is insufficient number of free hardware
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counters or function arguments are invalid.
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The counter id returned on success can be used with xt_perf_reset_counter
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and xt_perf_counter64 functions.
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<selector> - events group, one of XTPERF_CNT constants defined in
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xt_perf_consts.h;
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<mask> - events mask for selected group. Mask bit fields for each
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selector defined with XTPERF_MASK prefix in xt_perf_consts.h;
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<trace_level> - specifies interrupt levels at which to count events;
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if trace_level is greater or equal to zero events are
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counted only at interrupt levels below or equal to
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trace_level; if trace_level is negative events are
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counted only at (-trace_level) interrupt level or higher.
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*/
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extern counter_id_t xt_perf_init_counter64 ( unsigned int selector,
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unsigned int mask,
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int trace_level);
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/* xt_perf_reset_counter
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Reset counter value to 0.
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Returns zero on success or non zero if failed.
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*/
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extern int xt_perf_reset_counter (counter_id_t counter_id);
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/* xt_perf_counter32
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Read 32 bit counter value.
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Returns zero if counter id is not valid.
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*/
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extern unsigned int xt_perf_counter32 (counter_id_t counter_id);
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/* xt_perf_counter64
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Read 64 bit counter value.
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Counter must be initialized using xt_perf_init_counter64 function.
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Returns zero if counter id is not valid.
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*/
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extern unsigned long long xt_perf_counter64 (counter_id_t counter_id);
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/* xt_perf_overflow32
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Read overflow flag of 32 bit counter. This flag is dropped when
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counter initialized or reset. Once counter overflows and wraps
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around the flag is set and stays set until counter reset.
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Returns negative value if counter id is invalid, zero if counter
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not overflowed, positive if in overflowed state.
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*/
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extern int xt_perf_overflow32 (counter_id_t counter_id);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __XT_PERFMON_H__ */
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