bootloader: Enable clock glitch detection

Reset the device when clock glitch detected. Clock glitch detection is
only active in bootloader

components/bootloader/subproject/main/ld/esp32/bootloader.ld

@@ -49,6 +49,7 @@ SECTIONS
     *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)

components/bootloader/subproject/main/ld/esp32c3/bootloader.ld

@@ -36,6 +36,7 @@ SECTIONS
     *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)

components/bootloader/subproject/main/ld/esp32h2/bootloader.ld

@@ -36,6 +36,7 @@ SECTIONS
     *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_partitions.*(.literal .text .literal.* .text.*)

components/bootloader/subproject/main/ld/esp32s2/bootloader.ld

@@ -36,6 +36,7 @@ SECTIONS
     *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)

components/bootloader/subproject/main/ld/esp32s3/bootloader.ld

@@ -37,6 +37,7 @@ SECTIONS
     *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)

components/bootloader_support/CMakeLists.txt

@@ -26,6 +26,7 @@ if(BOOTLOADER_BUILD)
     "src/bootloader_console_loader.c"
     "src/bootloader_panic.c"
     "src/${IDF_TARGET}/bootloader_sha.c"
+    "src/${IDF_TARGET}/bootloader_soc.c"
     "src/${IDF_TARGET}/bootloader_${IDF_TARGET}.c"
     )
     list(APPEND priv_requires hal)

components/bootloader_support/include_bootloader/bootloader_soc.h

@@ -0,0 +1,27 @@
+/*
+ * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+/**
+ * @brief Configure analog super WDT reset
+ *
+ * @param enable Boolean to enable or disable super WDT reset
+ */
+void bootloader_ana_super_wdt_reset_config(bool enable);
+
+/**
+ * @brief Configure analog brownout reset
+ *
+ * @param enable Boolean to enable or disable brownout reset
+ */
+void bootloader_ana_bod_reset_config(bool enable);
+
+/**
+ * @brief Configure analog clock glitch reset
+ *
+ * @param enable Boolean to enable or disable clock glitch reset
+ */
+void bootloader_ana_clock_glitch_reset_config(bool enable);

components/bootloader_support/src/bootloader_utility.c

@@ -76,6 +76,7 @@
 #include "bootloader_utility.h"
 #include "bootloader_sha.h"
 #include "bootloader_console.h"
+#include "bootloader_soc.h"
 #include "esp_efuse.h"
 
 static const char *TAG = "boot";
@@ -636,6 +637,12 @@ static void load_image(const esp_image_metadata_t *image_data)
     ESP_LOGI(TAG, "Disabling RNG early entropy source...");
     bootloader_random_disable();
 
+    /* Disable glitch reset after all the security checks are completed.
+     * Glitch detection can be falsely triggered by EMI interference (high RF TX power, etc)
+     * and to avoid such false alarms, disable it.
+     */
+    bootloader_ana_clock_glitch_reset_config(false);
+
     // copy loaded segments to RAM, set up caches for mapped segments, and start application
     unpack_load_app(image_data);
 }

components/bootloader_support/src/esp32/bootloader_soc.c

@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdbool.h>
+
+void bootloader_ana_super_wdt_reset_config(bool enable)
+{
+    (void)enable;
+}
+
+void bootloader_ana_bod_reset_config(bool enable)
+{
+    (void)enable;
+}
+
+void bootloader_ana_clock_glitch_reset_config(bool enable)
+{
+    (void)enable;
+}

components/bootloader_support/src/esp32c3/bootloader_esp32c3.c

@@ -36,6 +36,7 @@
 #include "regi2c_ctrl.h"
 #include "bootloader_console.h"
 #include "bootloader_flash_priv.h"
+#include "bootloader_soc.h"
 #include "esp_efuse.h"
 
 static const char *TAG = "boot.esp32c3";
@@ -263,7 +264,7 @@ static inline void bootloader_hardware_init(void)
     }
 }
 
-static inline void bootloader_glitch_reset_disable(void)
+static inline void bootloader_ana_reset_config(void)
 {
     /*
       For origin chip & ECO1: only support swt reset;
@@ -271,11 +272,27 @@ static inline void bootloader_glitch_reset_disable(void)
       For ECO3: fix clock glitch reset bug, support all reset, include: swt & brownout & clock glitch reset.
     */
     uint8_t chip_version = bootloader_common_get_chip_revision();
-    if (chip_version < 2) {
-        REG_SET_FIELD(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SEL, RTC_CNTL_FIB_SUPER_WDT_RST);
-    } else {
-        // checked on ESP32-C3 revisions 2 and 3
-        REG_SET_FIELD(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SEL, RTC_CNTL_FIB_SUPER_WDT_RST | RTC_CNTL_FIB_BOR_RST);
+    switch (chip_version) {
+        case 0:
+        case 1:
+            //Enable WDT reset. Disable BOR and GLITCH reset
+            bootloader_ana_super_wdt_reset_config(true);
+            bootloader_ana_bod_reset_config(false);
+            bootloader_ana_clock_glitch_reset_config(false);
+            break;
+        case 2:
+            //Enable WDT and BOR reset. Disable GLITCH reset
+            bootloader_ana_super_wdt_reset_config(true);
+            bootloader_ana_bod_reset_config(true);
+            bootloader_ana_clock_glitch_reset_config(false);
+            break;
+        case 3:
+        default:
+            //Enable WDT, BOR, and GLITCH reset
+            bootloader_ana_super_wdt_reset_config(true);
+            bootloader_ana_bod_reset_config(true);
+            bootloader_ana_clock_glitch_reset_config(true);
+            break;
     }
 }
 
@@ -284,7 +301,7 @@ esp_err_t bootloader_init(void)
     esp_err_t ret = ESP_OK;
 
     bootloader_hardware_init();
-    bootloader_glitch_reset_disable();
+    bootloader_ana_reset_config();
     bootloader_super_wdt_auto_feed();
     // protect memory region
     bootloader_init_mem();

components/bootloader_support/src/esp32c3/bootloader_soc.c

@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdbool.h>
+#include "soc/soc.h"
+#include "soc/rtc_cntl_reg.h"
+
+void bootloader_ana_super_wdt_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SUPER_WDT_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_SWD_CONF_REG, RTC_CNTL_SWD_BYPASS_RST);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_SWD_CONF_REG, RTC_CNTL_SWD_BYPASS_RST);
+    }
+}
+
+void bootloader_ana_bod_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_BOR_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ANA_RST_EN);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ANA_RST_EN);
+    }
+}
+
+void bootloader_ana_clock_glitch_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_GLITCH_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_GLITCH_RST_EN);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_GLITCH_RST_EN);
+    }
+}

components/bootloader_support/src/esp32h2/bootloader_esp32h2.c

@@ -36,6 +36,7 @@
 #include "regi2c_ctrl.h"
 #include "bootloader_console.h"
 #include "bootloader_flash_priv.h"
+#include "bootloader_soc.h"
 
 static const char *TAG = "boot.esp32h2";
 
@@ -257,19 +258,12 @@ static inline void bootloader_hardware_init(void)
 
 }
 
-static inline void bootloader_glitch_reset_disable(void)
+static inline void bootloader_ana_reset_config(void)
 {
-    /*
-      For origin chip & ECO1: only support swt reset;
-      For ECO2: fix brownout reset bug, support swt & brownout reset;
-      For ECO3: fix clock glitch reset bug, support all reset, include: swt & brownout & clock glitch reset.
-    */
-    uint8_t chip_version = bootloader_common_get_chip_revision();
-    if (chip_version < 2) {
-        REG_SET_FIELD(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SEL, RTC_CNTL_FIB_SUPER_WDT_RST);
-    } else if (chip_version == 2) {
-        REG_SET_FIELD(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SEL, RTC_CNTL_FIB_SUPER_WDT_RST | RTC_CNTL_FIB_BOR_RST);
-    }
+    //Enable WDT, BOR, and GLITCH reset
+    bootloader_ana_super_wdt_reset_config(true);
+    bootloader_ana_bod_reset_config(true);
+    bootloader_ana_clock_glitch_reset_config(true);
 }
 
 esp_err_t bootloader_init(void)
@@ -277,7 +271,7 @@ esp_err_t bootloader_init(void)
     esp_err_t ret = ESP_OK;
 
     bootloader_hardware_init();
-    bootloader_glitch_reset_disable();
+    bootloader_ana_reset_config();
     bootloader_super_wdt_auto_feed();
     // protect memory region
     bootloader_init_mem();

components/bootloader_support/src/esp32h2/bootloader_soc.c

@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdbool.h>
+#include "soc/soc.h"
+#include "soc/rtc_cntl_reg.h"
+
+void bootloader_ana_super_wdt_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SUPER_WDT_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_SWD_CONF_REG, RTC_CNTL_SWD_BYPASS_RST);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_SWD_CONF_REG, RTC_CNTL_SWD_BYPASS_RST);
+    }
+}
+
+void bootloader_ana_bod_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_BOR_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ANA_RST_EN);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ANA_RST_EN);
+    }
+}
+
+void bootloader_ana_clock_glitch_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_GLITCH_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_GLITCH_RST_EN);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_GLITCH_RST_EN);
+    }
+}

components/bootloader_support/src/esp32s2/bootloader_soc.c

@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdbool.h>
+
+void bootloader_ana_super_wdt_reset_config(bool enable)
+{
+    (void)enable;
+}
+
+void bootloader_ana_bod_reset_config(bool enable)
+{
+    (void)enable;
+}
+
+void bootloader_ana_clock_glitch_reset_config(bool enable)
+{
+    (void)enable;
+}

components/bootloader_support/src/esp32s3/bootloader_esp32s3.c

@@ -34,6 +34,7 @@
 #include "bootloader_mem.h"
 #include "bootloader_console.h"
 #include "bootloader_flash_priv.h"
+#include "bootloader_soc.h"
 #include "esp_efuse.h"
 
 
@@ -296,9 +297,18 @@ static void bootloader_super_wdt_auto_feed(void)
     REG_WRITE(RTC_CNTL_SWD_WPROTECT_REG, 0);
 }
 
+static inline void bootloader_ana_reset_config(void)
+{
+    //Enable WDT, BOR, and GLITCH reset
+    bootloader_ana_super_wdt_reset_config(true);
+    bootloader_ana_bod_reset_config(true);
+    bootloader_ana_clock_glitch_reset_config(true);
+}
+
 esp_err_t bootloader_init(void)
 {
     esp_err_t ret = ESP_OK;
+    bootloader_ana_reset_config();
     bootloader_super_wdt_auto_feed();
     // protect memory region
     bootloader_init_mem();

components/bootloader_support/src/esp32s3/bootloader_soc.c

@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdbool.h>
+#include "soc/soc.h"
+#include "soc/rtc_cntl_reg.h"
+
+void bootloader_ana_super_wdt_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_SUPER_WDT_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_SWD_CONF_REG, RTC_CNTL_SWD_BYPASS_RST);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_SWD_CONF_REG, RTC_CNTL_SWD_BYPASS_RST);
+    }
+}
+
+void bootloader_ana_bod_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_BOR_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ANA_RST_EN);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ANA_RST_EN);
+    }
+}
+
+void bootloader_ana_clock_glitch_reset_config(bool enable)
+{
+    REG_CLR_BIT(RTC_CNTL_FIB_SEL_REG, RTC_CNTL_FIB_GLITCH_RST);
+
+    if (enable) {
+        REG_SET_BIT(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_GLITCH_RST_EN);
+    } else {
+        REG_CLR_BIT(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_GLITCH_RST_EN);
+    }
+}

components/soc/esp32s3/include/soc/rtc_cntl_reg.h

@@ -3584,6 +3584,10 @@ ork.*/
 #define RTC_CNTL_FIB_SEL_V  0x7
 #define RTC_CNTL_FIB_SEL_S  0
 
+#define RTC_CNTL_FIB_GLITCH_RST BIT(0)
+#define RTC_CNTL_FIB_BOR_RST BIT(1)
+#define RTC_CNTL_FIB_SUPER_WDT_RST BIT(2)
+
 #define RTC_CNTL_TOUCH_DAC_REG          (DR_REG_RTCCNTL_BASE + 0x14C)
 /* RTC_CNTL_TOUCH_PAD0_DAC : R/W ;bitpos:[31:29] ;default: 3'd0 ; */
 /*description: .*/