1 // Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <stdio.h>
16 #include "esp_log.h"
17 #include "esp_err.h"
18 #include "xtensa-debug-module.h"
19 #include "eri.h"
20 #include "trax.h"
21 #include "sdkconfig.h"
22
23 #if defined(CONFIG_ESP32_TRAX) || defined(CONFIG_ESP32S2_TRAX)
24 #define WITH_TRAX 1
25 #endif
26
27 static const char* TAG = "trax";
28
29
trax_start_trace(trax_downcount_unit_t units_until_stop)30 int trax_start_trace(trax_downcount_unit_t units_until_stop)
31 {
32 #if !WITH_TRAX
33 ESP_EARLY_LOGE(TAG, "Trax_start_trace called, but trax is disabled in menuconfig!");
34 return ESP_ERR_NO_MEM;
35 #endif
36 uint32_t v;
37 if (eri_read(ERI_TRAX_TRAXSTAT)&TRAXSTAT_TRACT) {
38 ESP_EARLY_LOGI(TAG, "Stopping active trace first.");
39 //Trace is active. Stop trace.
40 eri_write(ERI_TRAX_DELAYCNT, 0);
41 eri_write(ERI_TRAX_TRAXCTRL, eri_read(ERI_TRAX_TRAXCTRL)|TRAXCTRL_TRSTP);
42 //ToDo: This will probably trigger a trace done interrupt. ToDo: Fix, but how? -JD
43 eri_write(ERI_TRAX_TRAXCTRL, 0);
44 }
45 eri_write(ERI_TRAX_PCMATCHCTRL, 31); //do not stop at any pc match
46 v=TRAXCTRL_TREN | TRAXCTRL_TMEN | TRAXCTRL_PTOWS | (1<<TRAXCTRL_SMPER_SHIFT);
47 if (units_until_stop == TRAX_DOWNCOUNT_INSTRUCTIONS) v|=TRAXCTRL_CNTU;
48 //Enable trace. This trace has no stop condition and will just keep on running.
49 eri_write(ERI_TRAX_TRAXCTRL, v);
50 return ESP_OK;
51 }
52
53
trax_trigger_traceend_after_delay(int delay)54 int trax_trigger_traceend_after_delay(int delay)
55 {
56 #if !WITH_TRAX
57 ESP_EARLY_LOGE(TAG, "Trax_trigger_traceend_after_delay called, but trax is disabled in menuconfig!");
58 return ESP_ERR_NO_MEM;
59 #endif
60 eri_write(ERI_TRAX_DELAYCNT, delay);
61 eri_write(ERI_TRAX_TRAXCTRL, eri_read(ERI_TRAX_TRAXCTRL)|TRAXCTRL_TRSTP);
62 return ESP_OK;
63 }
64