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872be88a29
In order to quantify the overall time spent in the PSCI software implementation, an initial collection of PMF instrumentation points has been added. Instrumentation has been added to the following code paths: - Entry to PSCI SMC handler. The timestamp is captured as early as possible during the runtime exception and stored in memory before entering the PSCI SMC handler. - Exit from PSCI SMC handler. The timestamp is captured after normal return from the PSCI SMC handler or if a low power state was requested it is captured in the bl31 warm boot path before return to normal world. - Entry to low power state. The timestamp is captured before entry to a low power state which implies either standby or power down. As these power states are mutually exclusive, only one timestamp is defined to describe both. It is possible to differentiate between the two power states using the PSCI STAT interface. - Exit from low power state. The timestamp is captured after a standby or power up operation has completed. To calculate the number of cycles spent running code in Trusted Firmware one can perform the following calculation: (exit_psci - enter_psci) - (exit_low_pwr - enter_low_pwr). The resulting number of cycles can be converted to time given the frequency of the counter. Change-Id: Ie3b8f3d16409b6703747093b3a2d5c7429ad0166 Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
169 lines
5.6 KiB
C
169 lines
5.6 KiB
C
/*
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* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PMF_HELPERS_H__
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#define __PMF_HELPERS_H__
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#include <arch_helpers.h>
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#include <assert.h>
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#include <bl_common.h>
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#include <platform.h>
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#include <pmf.h>
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#include <stdint.h>
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#include <stddef.h>
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/*
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* Prototype for PMF service functions.
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*/
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typedef int (*pmf_svc_init_t)(void);
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typedef unsigned long long (*pmf_svc_get_ts_t)(unsigned int tid,
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u_register_t mpidr,
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unsigned int flags);
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/*
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* This is the definition of PMF service desc.
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*/
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typedef struct pmf_svc_desc {
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/* Structure version information */
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param_header_t h;
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/* Name of the PMF service */
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const char *name;
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/* PMF service config: Implementer id, Service id and total id*/
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unsigned int svc_config;
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/* PMF service initialization handler */
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pmf_svc_init_t init;
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/* PMF service time-stamp retrieval handler */
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pmf_svc_get_ts_t get_ts;
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} pmf_svc_desc_t;
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/*
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* Convenience macro to allocate memory for a PMF service.
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*/
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#define PMF_ALLOCATE_TIMESTAMP_MEMORY(_name, _total_id) \
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unsigned long long pmf_ts_mem_ ## _name[_total_id] \
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__aligned(CACHE_WRITEBACK_GRANULE) \
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__section("pmf_timestamp_array") \
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__used;
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/*
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* Convenience macro to validate tid index for the given TS array.
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*/
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#define PMF_VALIDATE_TID(_name, _tid) \
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assert((_tid & PMF_TID_MASK) < (ARRAY_SIZE(pmf_ts_mem_ ## _name)))
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/*
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* Convenience macros for capturing time-stamp.
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*/
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#define PMF_DEFINE_CAPTURE_TIMESTAMP(_name, _flags) \
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void pmf_capture_timestamp_ ## _name( \
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unsigned int tid, \
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unsigned long long ts) \
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{ \
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CASSERT(_flags, select_proper_config); \
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PMF_VALIDATE_TID(_name, tid); \
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uintptr_t base_addr = (uintptr_t) pmf_ts_mem_ ## _name; \
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if ((_flags) & PMF_STORE_ENABLE) \
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__pmf_store_timestamp(base_addr, tid, ts); \
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if ((_flags) & PMF_DUMP_ENABLE) \
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__pmf_dump_timestamp(tid, ts); \
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} \
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void pmf_capture_timestamp_with_cache_maint_ ## _name( \
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unsigned int tid, \
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unsigned long long ts) \
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{ \
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CASSERT(_flags, select_proper_config); \
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PMF_VALIDATE_TID(_name, tid); \
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uintptr_t base_addr = (uintptr_t) pmf_ts_mem_ ## _name; \
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if ((_flags) & PMF_STORE_ENABLE) \
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__pmf_store_timestamp_with_cache_maint(base_addr, tid, ts);\
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if ((_flags) & PMF_DUMP_ENABLE) \
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__pmf_dump_timestamp(tid, ts); \
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}
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/*
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* Convenience macros for retrieving time-stamp.
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*/
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#define PMF_DEFINE_GET_TIMESTAMP(_name) \
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unsigned long long pmf_get_timestamp_by_index_ ## _name( \
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unsigned int tid, unsigned int cpuid, unsigned int flags)\
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{ \
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PMF_VALIDATE_TID(_name, tid); \
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uintptr_t base_addr = (uintptr_t) pmf_ts_mem_ ## _name; \
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return __pmf_get_timestamp(base_addr, tid, cpuid, flags);\
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} \
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unsigned long long pmf_get_timestamp_by_mpidr_ ## _name( \
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unsigned int tid, u_register_t mpidr, unsigned int flags)\
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{ \
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PMF_VALIDATE_TID(_name, tid); \
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uintptr_t base_addr = (uintptr_t) pmf_ts_mem_ ## _name; \
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return __pmf_get_timestamp(base_addr, tid, \
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plat_core_pos_by_mpidr(mpidr), flags); \
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}
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/*
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* Convenience macro to register a PMF service.
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* This is needed for services that require SMC handling.
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*/
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#define PMF_DEFINE_SERVICE_DESC(_name, _implid, _svcid, _totalid, \
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_init, _getts_by_mpidr) \
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static const pmf_svc_desc_t __pmf_desc_ ## _name \
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__section("pmf_svc_descs") __used = { \
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.h.type = PARAM_EP, \
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.h.version = VERSION_1, \
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.h.size = sizeof(pmf_svc_desc_t), \
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.h.attr = 0, \
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.name = #_name, \
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.svc_config = ((((_implid) << PMF_IMPL_ID_SHIFT) & \
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PMF_IMPL_ID_MASK) | \
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(((_svcid) << PMF_SVC_ID_SHIFT) & \
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PMF_SVC_ID_MASK) | \
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(((_totalid) << PMF_TID_SHIFT) & \
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PMF_TID_MASK)), \
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.init = _init, \
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.get_ts = _getts_by_mpidr \
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};
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/* PMF internal functions */
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void __pmf_dump_timestamp(unsigned int tid, unsigned long long ts);
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void __pmf_store_timestamp(uintptr_t base_addr,
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unsigned int tid,
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unsigned long long ts);
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void __pmf_store_timestamp_with_cache_maint(uintptr_t base_addr,
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unsigned int tid,
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unsigned long long ts);
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unsigned long long __pmf_get_timestamp(uintptr_t base_addr,
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unsigned int tid,
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unsigned int cpuid,
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unsigned int flags);
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#endif /* __PMF_HELPERS_H__ */
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