feat(esp8266): Refactor task watch dog

1. Remove old watch dog function
2. Put WIFI NVS index table from RAM to flash

components/esp8266/source/esp_wifi_os_adapter.c

@@ -341,6 +341,13 @@ static int32_t rand_wrapper(void)
     return (int32_t)esp_random();
 }
 
+void *osi_task_top_sp(void)
+{
+    extern uint32_t **pxCurrentTCB;
+
+    return pxCurrentTCB[0];
+}
+
 const wifi_osi_funcs_t s_wifi_osi_funcs = {
     .version = ESP_WIFI_OS_ADAPTER_VERSION,
     

components/esp8266/source/startup.c

@@ -27,6 +27,7 @@
 #include "esp_phy_init.h"
 #include "esp_wifi_osi.h"
 #include "esp_heap_caps_init.h"
+#include "esp_task_wdt.h"
 #include "internal/esp_wifi_internal.h"
 
 #define FLASH_MAP_ADDR 0x40200000
@@ -58,11 +59,14 @@ static void user_init_entry(void *param)
     assert(mac_init() == 0);
     assert(base_gpio_init() == 0);
     esp_phy_load_cal_and_init(0);
-    assert(watchdog_init() == 0);
     assert(wifi_timer_init() == 0);
 
     esp_wifi_set_rx_pbuf_mem_type(WIFI_RX_PBUF_DRAM);
 
+#ifdef CONFIG_TASK_WDT
+    esp_task_wdt_init();
+#endif
+
     app_main();
 
     wifi_task_delete(NULL);

components/esp8266/source/task_wdt.c

@@ -0,0 +1,102 @@
+// Copyright 2018-2019 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 <stdint.h>
+
+#include "esp_log.h"
+#include "esp_libc.h"
+#include "esp_wifi_osi.h"
+#include "esp_task_wdt.h"
+#include "portmacro.h"
+#include "esp8266/eagle_soc.h"
+
+#define WDT_REG_READ(_reg)                  REG_READ(PERIPHS_WDT_BASEADDR + _reg)
+#define WDT_REG_WRITE(_reg, _val)           REG_WRITE(PERIPHS_WDT_BASEADDR + _reg, _val)
+#define CLEAR_WDT_REG_MASK(_reg, _mask)     WDT_REG_WRITE(_reg, WDT_REG_READ(_reg) & (~_mask))
+#define WDT_FEED()                          WDT_REG_WRITE(WDT_RST_ADDRESS, WDT_FEED_VALUE)
+
+static const char *TAG = "wdt";
+
+#ifdef CONFIG_TASK_WDT_PANIC
+/**
+  * @brief  Task watch dog interrupt function and it should do panic
+  */
+static void esp_task_wdt_isr(void *param)
+{
+    extern void panicHandler(void *frame, int wdt);
+
+    panicHandler(osi_task_top_sp(), 1);
+}
+#endif
+
+/**
+  * @brief  Just for pass compiling and mark wdt calling line
+  */
+esp_err_t esp_task_wdt_init(void)
+{
+    CLEAR_WDT_REG_MASK(WDT_CTL_ADDRESS, BIT0);
+
+#ifdef CONFIG_TASK_WDT_PANIC
+    const uint32_t panic_time_param = 11;
+
+    _xt_isr_attach(ETS_WDT_INUM, esp_task_wdt_isr, NULL);
+    _xt_isr_unmask(1 << ETS_WDT_INUM);
+
+    WDT_EDGE_INT_ENABLE();
+
+    ESP_LOGD(TAG, "Enable task watch dog panic, panic time parameter is %u", panic_time_param);
+#else
+    const uint32_t panic_time_param = 1;
+#endif
+
+    ESP_LOGD(TAG, "task watch dog trigger time parameter is %u", CONFIG_TASK_WDT_TIMEOUT_S);
+
+    WDT_REG_WRITE(WDT_OP_ADDRESS, CONFIG_TASK_WDT_TIMEOUT_S);   // 2^n * 0.8ms, mask 0xf, n = 13 -> (2^13 = 8192) * 0.8 * 0.001 = 6.5536
+    WDT_REG_WRITE(WDT_OP_ND_ADDRESS, panic_time_param);         // 2^n * 0.8ms, mask 0xf, n = 11 -> (2^11 = 2048) * 0.8 * 0.001 = 1.6384
+
+    SET_PERI_REG_BITS(PERIPHS_WDT_BASEADDR + WDT_CTL_ADDRESS, WDT_CTL_RSTLEN_MASK, 7 << WDT_CTL_RSTLEN_LSB, 0);
+    // interrupt then reset
+    SET_PERI_REG_BITS(PERIPHS_WDT_BASEADDR + WDT_CTL_ADDRESS, WDT_CTL_RSPMOD_MASK, 0 << WDT_CTL_RSPMOD_LSB, 0);
+    // start task watch dog1
+    SET_PERI_REG_BITS(PERIPHS_WDT_BASEADDR + WDT_CTL_ADDRESS, WDT_CTL_EN_MASK, 1 << WDT_CTL_EN_LSB, 0);
+
+    WDT_FEED();
+
+    return 0;
+}
+
+/**
+  * @brief  Reset(Feed) the Task Watchdog Timer (TWDT) on behalf of the currently
+  *         running task
+  */
+void esp_task_wdt_reset(void)
+{
+    WDT_FEED();
+}
+
+/**
+  * @brief  Just for pass compiling and mark wdt calling line
+  */
+void pp_soft_wdt_stop(void)
+{
+
+}
+
+/**
+  * @brief  Just for pass compiling and mark wdt calling line
+  */
+void pp_soft_wdt_restart(void)
+{
+
+}