xtensa: add TRAX support for esp32s2

components/xtensa/esp32s2/trax_init.c

@@ -0,0 +1,38 @@
+// Copyright 2020 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 <stdio.h>
+#include "esp_err.h"
+#include "esp_log.h"
+#include "trax.h"
+#include "soc/sensitive_reg.h"
+#include "sdkconfig.h"
+
+#define TRACEMEM_MUX_BLK0_NUM                   19
+#define TRACEMEM_MUX_BLK1_NUM                   20
+
+static const char* __attribute__((unused)) TAG = "trax";
+
+int trax_enable(trax_ena_select_t which) 
+{
+#ifndef CONFIG_ESP32S2_TRAX
+    ESP_LOGE(TAG, "Trax_enable called, but trax is disabled in menuconfig!");
+    return ESP_ERR_NO_MEM;
+#endif
+    if (which != TRAX_ENA_PRO) {
+        return ESP_ERR_INVALID_ARG;
+    }
+    REG_WRITE(DPORT_PMS_OCCUPY_3_REG, BIT(TRACEMEM_MUX_BLK1_NUM-4));
+    return ESP_OK;
+}