add esp32s2beta component

components/esp32s2beta/pm_trace.c

@@ -0,0 +1,52 @@
+// Copyright 2016-2017 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed 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.
+
+
+#include "esp_private/pm_trace.h"
+#include "driver/gpio.h"
+#include "soc/gpio_reg.h"
+
+/* GPIOs to use for tracing of esp_pm events.
+ * Two entries in the array for each type, one for each CPU.
+ * Feel free to change when debugging.
+ */
+static const int DRAM_ATTR s_trace_io[] = {
+        BIT(4),  BIT(5),  // ESP_PM_TRACE_IDLE
+        BIT(16), BIT(17), // ESP_PM_TRACE_TICK
+        BIT(18), BIT(18), // ESP_PM_TRACE_FREQ_SWITCH
+        BIT(19), BIT(19), // ESP_PM_TRACE_CCOMPARE_UPDATE
+        BIT(25), BIT(26), // ESP_PM_TRACE_ISR_HOOK
+        BIT(27), BIT(27), // ESP_PM_TRACE_SLEEP
+};
+
+void esp_pm_trace_init()
+{
+    for (size_t i = 0; i < sizeof(s_trace_io)/sizeof(s_trace_io[0]); ++i) {
+        int io = __builtin_ffs(s_trace_io[i]);
+        if (io == 0) {
+            continue;
+        }
+        gpio_set_direction(io - 1, GPIO_MODE_OUTPUT);
+    }
+}
+
+void IRAM_ATTR esp_pm_trace_enter(esp_pm_trace_event_t event, int core_id)
+{
+    REG_WRITE(GPIO_OUT_W1TS_REG, s_trace_io[2 * event + core_id]);
+}
+
+void IRAM_ATTR esp_pm_trace_exit(esp_pm_trace_event_t event, int core_id)
+{
+    REG_WRITE(GPIO_OUT_W1TC_REG, s_trace_io[2 * event + core_id]);
+}