arch/tricore: add up_perf function for tricore

Add performance counter support for TriCore architecture using the
CPU clock counter (CCNT). Implements up_perf_init, up_perf_getfreq,
up_perf_gettime and up_perf_convert interfaces.

Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>

arch/tricore/src/common/CMakeLists.txt

@@ -35,6 +35,7 @@ set(SRCS
     tricore_irq.c
     tricore_main.c
     tricore_nputs.c
+    tricore_perf.c
     tricore_registerdump.c
     tricore_releasestack.c
     tricore_saveusercontext.c

arch/tricore/src/common/Make.defs

@@ -36,6 +36,7 @@ CMN_CSRCS += tricore_initialstate.c
 CMN_CSRCS += tricore_irq.c
 CMN_CSRCS += tricore_main.c
 CMN_CSRCS += tricore_nputs.c
+CMN_CSRCS += tricore_perf.c
 CMN_CSRCS += tricore_registerdump.c
 CMN_CSRCS += tricore_releasestack.c
 CMN_CSRCS += tricore_saveusercontext.c

arch/tricore/src/common/tricore_initialize.c

@@ -62,6 +62,10 @@ volatile bool g_interrupt_context[CONFIG_SMP_NCPUS];
 
 void up_initialize(void)
 {
+#ifdef CONFIG_ARCH_PERF_EVENTS
+  up_perf_init((void *)IFX_CFG_CPU_CLOCK_FREQUENCY);
+#endif
+
   tricore_trapinit();
 
 #ifdef CONFIG_ARCH_ICACHE

arch/tricore/src/common/tricore_perf.c

@@ -0,0 +1,69 @@
+/****************************************************************************
+ * arch/tricore/src/common/tricore_perf.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/arch.h>
+#include <nuttx/clock.h>
+
+#include "tricore_internal.h"
+
+#ifdef CONFIG_ARCH_PERF_EVENTS
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static unsigned long g_cpu_freq = ULONG_MAX;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void up_perf_init(void *arg)
+{
+  g_cpu_freq = (unsigned long)(uintptr_t)arg;
+
+  IfxCpu_resetAndStartCounters(IfxCpu_CounterMode_normal);
+}
+
+unsigned long up_perf_getfreq(void)
+{
+  return g_cpu_freq;
+}
+
+clock_t up_perf_gettime(void)
+{
+  return (clock_t)IfxCpu_getClockCounter();
+}
+
+void up_perf_convert(clock_t elapsed, struct timespec *ts)
+{
+  clock_t left;
+
+  ts->tv_sec  = elapsed / g_cpu_freq;
+  left        = elapsed - ts->tv_sec * g_cpu_freq;
+  ts->tv_nsec = NSEC_PER_SEC * (uint64_t)left / g_cpu_freq;
+}
+#endif