soc: espressif: move code start prior hw init

Make sure vector table and BSS clean up
is performed pior hardware initialization.

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>

drivers/flash/flash_esp32.c

@@ -19,6 +19,7 @@
 #include <soc/spi_struct.h>
 #include <esp_flash_encrypt.h>
 #include <esp_flash_internal.h>
+#include <bootloader_flash_priv.h>
 
 #include <zephyr/kernel.h>
 #include <zephyr/device.h>
@@ -69,21 +70,49 @@ static inline void flash_esp32_sem_give(const struct device *dev)
 
 #endif /* CONFIG_MULTITHREADING */
 
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/sys/util.h>
+#include <stdint.h>
+#include <string.h>
+
 static int flash_esp32_read(const struct device *dev, off_t address, void *buffer, size_t length)
 {
 	int ret = 0;
 
-	flash_esp32_sem_take(dev);
+#ifdef CONFIG_MCUBOOT
+	/* ensure everything is 4-byte aligned */
+	size_t aligned_length = ROUND_UP(length, 4);
+	off_t aligned_address = ROUND_DOWN(address, 4);
+	size_t address_offset = address - aligned_address;
+	uint32_t temp_buf[aligned_length / 4];
+
 	if (!esp_flash_encryption_enabled()) {
-		ret = esp_flash_read(NULL, buffer, address, length);
+		ret = esp_rom_flash_read(aligned_address, temp_buf, aligned_length, false);
 	} else {
+		ret = esp_rom_flash_read(aligned_address, temp_buf, aligned_length, true);
+	}
+
+	memcpy((void *)buffer, ((uint8_t *)temp_buf) + address_offset, length);
+#else
+
+	flash_esp32_sem_take(dev);
+
+	if (esp_flash_encryption_enabled()) {
 		ret = esp_flash_read_encrypted(NULL, address, buffer, length);
+	} else {
+		ret = esp_flash_read(NULL, buffer, address, length);
 	}
+
 	flash_esp32_sem_give(dev);
+
+#endif
+
 	if (ret != 0) {
-		LOG_ERR("esp_flash_read failed %d", ret);
+		LOG_ERR("Flash read error: %d", ret);
 		return -EIO;
 	}
+
 	return 0;
 }
 
@@ -94,28 +123,55 @@ static int flash_esp32_write(const struct device *dev,
 {
 	int ret = 0;
 
-	flash_esp32_sem_take(dev);
+#ifdef CONFIG_MCUBOOT
+	/* ensure everything is 4-byte aligned */
+	size_t aligned_length = ROUND_UP(length, 4);
+	off_t aligned_address = ROUND_DOWN(address, 4);
+	size_t address_offset = address - aligned_address;
+	uint32_t temp_buf[aligned_length / 4];
+
 	if (!esp_flash_encryption_enabled()) {
-		ret = esp_flash_write(NULL, buffer, address, length);
+		ret = esp_rom_flash_write(aligned_address, temp_buf, aligned_length, false);
 	} else {
+		ret = esp_rom_flash_write(aligned_address, temp_buf, aligned_length, true);
+	}
+
+	memcpy((void *)buffer, ((uint8_t *)temp_buf) + address_offset, length);
+#else
+
+	flash_esp32_sem_take(dev);
+
+	if (esp_flash_encryption_enabled()) {
 		ret = esp_flash_write_encrypted(NULL, address, buffer, length);
+	} else {
+		ret = esp_flash_write(NULL, buffer, address, length);
 	}
+
 	flash_esp32_sem_give(dev);
 
+#endif
+
 	if (ret != 0) {
-		LOG_ERR("esp_flash_write failed %d", ret);
+		LOG_ERR("Flash write error: %d", ret);
 		return -EIO;
 	}
+
 	return 0;
 }
 
 static int flash_esp32_erase(const struct device *dev, off_t start, size_t len)
 {
+	int ret = 0;
+
+#ifdef CONFIG_MCUBOOT
+	ret = esp_rom_flash_erase_range(start, len);
+#else
 	flash_esp32_sem_take(dev);
-	int ret = esp_flash_erase_region(NULL, start, len);
+	ret = esp_flash_erase_region(NULL, start, len);
 	flash_esp32_sem_give(dev);
+#endif
 	if (ret != 0) {
-		LOG_ERR("esp_flash_erase_region failed %d", ret);
+		LOG_ERR("Flash erase error: %d", ret);
 		return -EIO;
 	}
 	return 0;
@@ -146,18 +202,12 @@ flash_esp32_get_parameters(const struct device *dev)
 
 static int flash_esp32_init(const struct device *dev)
 {
-	uint32_t ret = 0;
-
 #ifdef CONFIG_MULTITHREADING
 	struct flash_esp32_dev_data *const dev_data = dev->data;
 
 	k_sem_init(&dev_data->sem, 1, 1);
 #endif /* CONFIG_MULTITHREADING */
-	ret = esp_flash_init_default_chip();
-	if (ret != 0) {
-		LOG_ERR("esp_flash_init_default_chip failed %d", ret);
-		return 0;
-	}
+
 	return 0;
 }
 

soc/espressif/common/loader.c

@@ -21,9 +21,11 @@
 #include <esp_log.h>
 #include <bootloader_clock.h>
 #include <bootloader_common.h>
-
 #include <esp_cpu.h>
 
+#include <zephyr/linker/linker-defs.h>
+#include <kernel_internal.h>
+
 #if CONFIG_SOC_SERIES_ESP32C6
 #include <soc/hp_apm_reg.h>
 #include <soc/lp_apm_reg.h>
@@ -99,13 +101,6 @@ static struct rom_segments map = {
 	.drom_size = (uint32_t)&_image_drom_size,
 };
 
-#ifndef CONFIG_BOOTLOADER_MCUBOOT
-static int spi_flash_read(uint32_t address, void *buffer, size_t length)
-{
-	return esp_flash_read(NULL, buffer, address, length);
-}
-#endif /* CONFIG_BOOTLOADER_MCUBOOT */
-
 void map_rom_segments(int core, struct rom_segments *map)
 {
 	uint32_t app_irom_vaddr_align = map->irom_map_addr & MMU_FLASH_MASK;
@@ -126,7 +121,8 @@ void map_rom_segments(int core, struct rom_segments *map)
 
 	while (segments++ < 16) {
 
-		if (spi_flash_read(offset, &segment_hdr, sizeof(esp_image_segment_header_t)) != 0) {
+		if (esp_rom_flash_read(offset, &segment_hdr,
+					      sizeof(esp_image_segment_header_t), true) != 0) {
 			ESP_EARLY_LOGE(TAG, "Failed to read segment header at %x", offset);
 			abort();
 		}
@@ -255,6 +251,13 @@ void map_rom_segments(int core, struct rom_segments *map)
 void __start(void)
 {
 #ifdef CONFIG_RISCV_GP
+
+	__asm__ __volatile__("la t0, _esp_vector_table\n"
+			     "csrw mtvec, t0\n");
+
+	/* Disable normal interrupts. */
+	csr_read_clear(mstatus, MSTATUS_MIE);
+
 	/* Configure the global pointer register
 	 * (This should be the first thing startup does, as any other piece of code could be
 	 * relaxed by the linker to access something relative to __global_pointer$)
@@ -263,17 +266,40 @@ void __start(void)
 			     ".option norelax\n"
 			     "la gp, __global_pointer$\n"
 			     ".option pop");
-#endif
 
-#ifndef CONFIG_BOOTLOADER_MCUBOOT
-	/* Init fundamental components */
+	z_bss_zero();
+
+#else /* xtensa */
+
+	extern uint32_t _init_start;
+
+	/* Move the exception vector table to IRAM. */
+	__asm__ __volatile__("wsr %0, vecbase" : : "r"(&_init_start));
+
+	z_bss_zero();
+
+	__asm__ __volatile__("" : : "g"(&__bss_start) : "memory");
+
+	/* Disable normal interrupts. */
+	__asm__ __volatile__("wsr %0, PS" : : "r"(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE));
+
+	/* Initialize the architecture CPU pointer.  Some of the
+	 * initialization code wants a valid arch_current_thread() before
+	 * arch_kernel_init() is invoked.
+	 */
+	__asm__ __volatile__("wsr.MISC0 %0; rsync" : : "r"(&_kernel.cpus[0]));
+
+#endif /* CONFIG_RISCV_GP */
+
+/* Initialize hardware only during 1st boot  */
+#if defined(CONFIG_MCUBOOT) || defined(CONFIG_ESP_SIMPLE_BOOT)
 	if (hardware_init()) {
 		ESP_EARLY_LOGE(TAG, "HW init failed, aborting");
 		abort();
 	}
 #endif
 
-#if !defined(CONFIG_MCUBOOT)
+#if defined(CONFIG_ESP_SIMPLE_BOOT) || defined(CONFIG_BOOTLOADER_MCUBOOT)
 	map_rom_segments(0, &map);
 
 	/* Show map segments continue using same log format as during MCUboot phase */
@@ -282,19 +308,19 @@ void __start(void)
 	ESP_EARLY_LOGI(TAG, "%s segment: paddr=%08xh, vaddr=%08xh, size=%05Xh (%6d) map", "DROM",
 		       map.drom_flash_offset, map.drom_map_addr, map.drom_size, map.drom_size);
 	esp_rom_uart_tx_wait_idle(CONFIG_ESP_CONSOLE_UART_NUM);
-#endif
 
-#ifndef CONFIG_SOC_SERIES_ESP32C2
 	/* Disable RNG entropy source as it was already used */
 	soc_random_disable();
-#endif
-#if defined(CONFIG_SOC_SERIES_ESP32S3) || defined(CONFIG_SOC_SERIES_ESP32C3)
+
 	/* Disable glitch detection as it can be falsely triggered by EMI interference */
-	ESP_EARLY_LOGI(TAG, "Disabling glitch detection");
 	ana_clock_glitch_reset_config(false);
-#endif
-#ifndef CONFIG_MCUBOOT
+
 	ESP_EARLY_LOGI(TAG, "libc heap size %d kB.", libc_heap_size / 1024);
+
+	__esp_platform_app_start();
+#endif /* CONFIG_ESP_SIMPLE_BOOT || CONFIG_BOOTLOADER_MCUBOOT */
+
+#if defined(CONFIG_MCUBOOT)
+	__esp_platform_mcuboot_start();
 #endif
-	__esp_platform_start();
 }

soc/espressif/esp32/esp32-mp.c

@@ -453,4 +453,10 @@ int esp_appcpu_init(void)
 
 	return 0;
 }
+
+#if !defined(CONFIG_MCUBOOT)
+extern int esp_appcpu_init(void);
+SYS_INIT(esp_appcpu_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+#endif
+
 #endif /* CONFIG_SOC_ENABLE_APPCPU */

soc/espressif/esp32/hw_init.c

@@ -57,14 +57,8 @@ int hardware_init(void)
 	print_banner();
 #endif /* CONFIG_ESP_CONSOLE */
 
-	spi_flash_init_chip_state();
-	err = esp_flash_init_default_chip();
-	if (err != 0) {
-		ESP_EARLY_LOGE(TAG, "Failed to init flash chip, error %d", err);
-		return err;
-	}
-
 	reset_mmu();
+
 	flash_update_id();
 
 	err = bootloader_flash_xmc_startup();
@@ -90,6 +84,7 @@ int hardware_init(void)
 
 	check_wdt_reset();
 	config_wdt();
+
 	soc_random_enable();
 
 	return 0;

soc/espressif/esp32/soc.c

@@ -1,109 +1,36 @@
 /*
  * Copyright (c) 2017 Intel Corporation
+ * Copyright (c) 2025 Espressif Systems (Shanghai) CO LTD.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* Include esp-idf headers first to avoid redefining BIT() macro */
 #include <soc.h>
-#include <soc/rtc_cntl_reg.h>
-#include <soc/timer_group_reg.h>
-#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
-#include <xtensa/config/core-isa.h>
-#include <xtensa/corebits.h>
-#include <esp_private/spi_flash_os.h>
-#include <esp_private/esp_mmu_map_private.h>
-#include <esp_flash_internal.h>
-#if CONFIG_ESP_SPIRAM
-#include "psram.h"
-#endif
-
-#include <zephyr/kernel_structs.h>
-#include <string.h>
-#include <zephyr/toolchain.h>
-#include <zephyr/types.h>
-#include <zephyr/linker/linker-defs.h>
-#include <kernel_internal.h>
-
+#include <soc_init.h>
+#include <flash_init.h>
+#include <esp_private/cache_utils.h>
 #include <esp_private/system_internal.h>
-#include <esp32/rom/cache.h>
-#include <esp_cpu.h>
-#include <hal/soc_hal.h>
-#include <hal/cpu_hal.h>
-#include <soc/gpio_periph.h>
-#include <esp_err.h>
 #include <esp_timer.h>
-#include <hal/wdt_hal.h>
-#include <esp_app_format.h>
-
-#ifndef CONFIG_SOC_ENABLE_APPCPU
-#include "esp_clk_internal.h"
-#endif /* CONFIG_SOC_ENABLE_APPCPU */
-
+#include <psram.h>
+#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
 #include <zephyr/sys/printk.h>
-#include "esp_log.h"
-
-#define TAG "boot.esp32"
 
 extern void z_prep_c(void);
 extern void esp_reset_reason_init(void);
-extern int esp_appcpu_init(void);
 
-/*
- * This is written in C rather than assembly since, during the port bring up,
- * Zephyr is being booted by the Espressif bootloader.  With it, the C stack
- * is already set up.
- */
-void IRAM_ATTR __esp_platform_start(void)
+void IRAM_ATTR __esp_platform_app_start(void)
 {
-	extern uint32_t _init_start;
-
-	/* Move the exception vector table to IRAM. */
-	__asm__ __volatile__ ("wsr %0, vecbase" : : "r"(&_init_start));
-
-	z_bss_zero();
-
-	__asm__ __volatile__ ("" : : "g"(&__bss_start) : "memory");
-
-	/* Disable normal interrupts. */
-	__asm__ __volatile__ ("wsr %0, PS" : : "r"(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE));
-
-	/* Initialize the architecture CPU pointer.  Some of the
-	 * initialization code wants a valid _current before
-	 * z_prep_c() is invoked.
-	 */
-	__asm__ __volatile__("wsr.MISC0 %0; rsync" : : "r"(&_kernel.cpus[0]));
-
 	esp_reset_reason_init();
 
-#ifndef CONFIG_MCUBOOT
-	/* ESP-IDF/MCUboot 2nd stage bootloader enables RTC WDT to check
-	 * on startup sequence related issues in application. Hence disable that
-	 * as we are about to start Zephyr environment.
-	 */
-	wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
-
-	wdt_hal_write_protect_disable(&rtc_wdt_ctx);
-	wdt_hal_disable(&rtc_wdt_ctx);
-	wdt_hal_write_protect_enable(&rtc_wdt_ctx);
-
 	esp_timer_early_init();
 
-	esp_mspi_pin_init();
-
-	esp_flash_app_init();
+	esp_flash_config();
 
-	esp_mmu_map_init();
+	esp_intr_initialize();
 
 #if CONFIG_ESP_SPIRAM
 	esp_init_psram();
-#endif /* CONFIG_ESP_SPIRAM */
 
-#endif /* !CONFIG_MCUBOOT */
-
-	esp_intr_initialize();
-
-#if CONFIG_ESP_SPIRAM
 	/* Init Shared Multi Heap for PSRAM */
 	int err = esp_psram_smh_init();
 
@@ -118,6 +45,16 @@ void IRAM_ATTR __esp_platform_start(void)
 	CODE_UNREACHABLE;
 }
 
+void IRAM_ATTR __esp_platform_mcuboot_start(void)
+{
+	esp_intr_initialize();
+
+	/* Start Zephyr */
+	z_prep_c();
+
+	CODE_UNREACHABLE;
+}
+
 /* Boot-time static default printk handler, possibly to be overridden later. */
 int IRAM_ATTR arch_printk_char_out(int c)
 {
@@ -132,8 +69,3 @@ void sys_arch_reboot(int type)
 {
 	esp_restart_noos();
 }
-
-#if defined(CONFIG_SOC_ENABLE_APPCPU) && !defined(CONFIG_MCUBOOT)
-extern int esp_appcpu_init(void);
-SYS_INIT(esp_appcpu_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
-#endif

soc/espressif/esp32/soc.h

@@ -20,7 +20,8 @@
 #include <xtensa/core-macros.h>
 #include <esp_private/esp_clk.h>
 
-void __esp_platform_start(void);
+void __esp_platform_mcuboot_start(void);
+void __esp_platform_app_start(void);
 
 static inline void esp32_set_mask32(uint32_t v, uint32_t mem_addr)
 {

soc/espressif/esp32c2/default.ld

@@ -212,6 +212,7 @@ SECTIONS
     *libzephyr.a:console_init.*(.literal .text .literal.* .text.*)
     *libzephyr.a:soc_init.*(.literal .text .literal.* .text.*)
     *libzephyr.a:hw_init.*(.literal .text .literal.* .text.*)
+    *libzephyr.a:soc_random.*(.literal .text .literal.* .text.*)
     *libarch__riscv__core.a:(.literal .text .literal.* .text.*)
     *libsubsys__net__l2__ethernet.a:(.literal .text .literal.* .text.*)
     *libsubsys__net__lib__config.a:(.literal .text .literal.* .text.*)
@@ -357,7 +358,6 @@ SECTIONS
 
     *libzephyr.a:esp_image_format.*(.literal .text .literal.* .text.*)
     *libzephyr.a:flash_ops.*(.literal .text .literal.* .text.*)
-    *libzephyr.a:flash_ops_esp32c2.*(.literal .text .literal.* .text.*)
     *libzephyr.a:flash_encrypt.*(.literal .text .literal.* .text.*)
     *libzephyr.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)
     *libzephyr.a:flash_partitions.*(.literal .text .literal.* .text.*)
@@ -463,6 +463,7 @@ SECTIONS
     *libzephyr.a:console_init.*(.rodata .rodata.*)
     *libzephyr.a:soc_init.*(.rodata .rodata.*)
     *libzephyr.a:hw_init.*(.rodata .rodata.*)
+    *libzephyr.a:soc_random.*(.rodata .rodata.*)
     *libzephyr.a:cache_utils.*(.rodata .rodata.* .srodata .srodata.*)
 
     /* [mapping:hal] */

soc/espressif/esp32c2/hw_init.c

@@ -57,15 +57,9 @@ int hardware_init(void)
 	print_banner();
 #endif /* CONFIG_ESP_CONSOLE */
 
-	spi_flash_init_chip_state();
-	err = esp_flash_init_default_chip();
-	if (err != 0) {
-		ESP_EARLY_LOGE(TAG, "Failed to init flash chip, error %d", err);
-		return err;
-	}
-
 	cache_hal_init();
 	mmu_hal_init();
+
 	flash_update_id();
 
 	err = bootloader_flash_xmc_startup();
@@ -92,5 +86,7 @@ int hardware_init(void)
 	check_wdt_reset();
 	config_wdt();
 
+	soc_random_enable();
+
 	return 0;
 }

soc/espressif/esp32c2/soc.c

@@ -1,83 +1,39 @@
 /*
- * Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2024-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* Include esp-idf headers first to avoid redefining BIT() macro */
-#include <soc/rtc_cntl_reg.h>
-#include <soc/timer_group_reg.h>
-#include <soc/ext_mem_defs.h>
-#include <soc/gpio_reg.h>
-#include <soc/syscon_reg.h>
-#include <soc/system_reg.h>
-#include "hal/wdt_hal.h"
-#include "esp_cpu.h"
-#include "hal/soc_hal.h"
-#include "hal/cpu_hal.h"
-#include "esp_timer.h"
-#include "esp_private/system_internal.h"
-#include "esp_clk_internal.h"
-#include <soc/interrupt_reg.h>
-#include <esp_private/spi_flash_os.h>
-#include "esp_private/esp_mmu_map_private.h"
-#include <esp_flash_internal.h>
-
+#include <soc.h>
+#include <soc_init.h>
+#include <flash_init.h>
+#include <esp_private/cache_utils.h>
+#include <esp_private/system_internal.h>
+#include <esp_timer.h>
 #include <zephyr/drivers/interrupt_controller/intc_esp32c3.h>
-
 #include <zephyr/kernel_structs.h>
 #include <kernel_internal.h>
-#include <string.h>
-#include <zephyr/toolchain.h>
-#include <soc.h>
 
 extern void esp_reset_reason_init(void);
 
-/*
- * This is written in C rather than assembly since, during the port bring up,
- * Zephyr is being booted by the Espressif bootloader.  With it, the C stack
- * is already set up.
- */
-void __attribute__((section(".iram1"))) __esp_platform_start(void)
+void IRAM_ATTR __esp_platform_app_start(void)
 {
-	__asm__ __volatile__("la t0, _esp32c2_vector_table\n"
-						"csrw mtvec, t0\n");
-
-	z_bss_zero();
-
-	/* Disable normal interrupts. */
-	csr_read_clear(mstatus, MSTATUS_MIE);
-
 	esp_reset_reason_init();
 
-#ifndef CONFIG_MCUBOOT
-	/* ESP-IDF 2nd stage bootloader enables RTC WDT to check on startup sequence
-	 * related issues in application. Hence disable that as we are about to start
-	 * Zephyr environment.
-	 */
-	wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
-
-	wdt_hal_write_protect_disable(&rtc_wdt_ctx);
-	wdt_hal_disable(&rtc_wdt_ctx);
-	wdt_hal_write_protect_enable(&rtc_wdt_ctx);
-
-	/* Enable wireless phy subsystem clock,
-	 * This needs to be done before the kernel starts
-	 */
-	REG_CLR_BIT(SYSTEM_WIFI_CLK_EN_REG, SYSTEM_WIFI_CLK_SDIOSLAVE_EN);
-	SET_PERI_REG_MASK(SYSTEM_WIFI_CLK_EN_REG, SYSTEM_WIFI_CLK_EN);
-
 	esp_timer_early_init();
 
-	esp_mspi_pin_init();
+	esp_flash_config();
 
-	esp_flash_app_init();
+	esp_intr_initialize();
 
-	esp_mmu_map_init();
+	/* Start Zephyr */
+	z_cstart();
 
-#endif /* !CONFIG_MCUBOOT */
+	CODE_UNREACHABLE;
+}
 
-	/*Initialize the esp32c2 interrupt controller */
+void IRAM_ATTR __esp_platform_mcuboot_start(void)
+{
 	esp_intr_initialize();
 
 	/* Start Zephyr */

soc/espressif/esp32c2/soc.h

@@ -18,7 +18,8 @@
 
 #ifndef _ASMLANGUAGE
 
-void __esp_platform_start(void);
+void __esp_platform_mcuboot_start(void);
+void __esp_platform_app_start(void);
 
 static inline uint32_t esp_core_id(void)
 {

soc/espressif/esp32c2/vectors.S

@@ -22,12 +22,12 @@ GTEXT(_isr_wrapper)
 	 * only uses the 24 MSBs of the MTVEC, i.e. (MTVEC & 0xffffff00).
 	 */
 
-	.global  _esp32c2_vector_table
+	.global  _esp_vector_table
 	.section .exception_vectors.text
 	.balign   0x100
-	.type     _esp32c2_vector_table, @function
+	.type     _esp_vector_table, @function
 
-_esp32c2_vector_table:
+_esp_vector_table:
 	.option push
 	.option norvc
 	.rept (32)

soc/espressif/esp32c3/hw_init.c

@@ -59,16 +59,9 @@ int hardware_init(void)
 	print_banner();
 #endif /* CONFIG_ESP_CONSOLE */
 
-
-	spi_flash_init_chip_state();
-	err = esp_flash_init_default_chip();
-	if (err != 0) {
-		ESP_EARLY_LOGE(TAG, "Failed to init flash chip, error %d", err);
-		return err;
-	}
-
 	cache_hal_init();
 	mmu_hal_init();
+
 	flash_update_id();
 
 	err = bootloader_flash_xmc_startup();

soc/espressif/esp32c3/memory.h

@@ -47,7 +47,7 @@
 #define BOOTLOADER_STACK_OVERHEAD      0x0
 /* These lengths can be adjusted, if necessary: */
 #define BOOTLOADER_DRAM_SEG_LEN        0x9800
-#define BOOTLOADER_IRAM_SEG_LEN        0x9800
+#define BOOTLOADER_IRAM_SEG_LEN        0x9C00
 #define BOOTLOADER_IRAM_LOADER_SEG_LEN 0x1400
 
 /* Start of the lower region is determined by region size and the end of the higher region */

soc/espressif/esp32c3/soc.c

@@ -1,83 +1,40 @@
 /*
  * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2025 Espressif Systems (Shanghai) CO LTD.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* Include esp-idf headers first to avoid redefining BIT() macro */
-#include <soc/rtc_cntl_reg.h>
-#include <soc/timer_group_reg.h>
-#include <soc/ext_mem_defs.h>
-#include <soc/gpio_reg.h>
-#include <soc/syscon_reg.h>
-#include <soc/system_reg.h>
-#include "hal/wdt_hal.h"
-#include "esp_cpu.h"
-#include "hal/soc_hal.h"
-#include "hal/cpu_hal.h"
-#include "esp_timer.h"
-#include "esp_private/system_internal.h"
-#include "esp_clk_internal.h"
-#include <soc/interrupt_reg.h>
-#include <esp_private/spi_flash_os.h>
-#include "esp_private/esp_mmu_map_private.h"
-#include <esp_flash_internal.h>
-
+#include <soc.h>
+#include <soc_init.h>
+#include <flash_init.h>
+#include <esp_private/cache_utils.h>
+#include <esp_private/system_internal.h>
+#include <esp_timer.h>
 #include <zephyr/drivers/interrupt_controller/intc_esp32c3.h>
-
 #include <zephyr/kernel_structs.h>
 #include <kernel_internal.h>
-#include <string.h>
-#include <zephyr/toolchain.h>
-#include <soc.h>
 
 extern void esp_reset_reason_init(void);
 
-/*
- * This is written in C rather than assembly since, during the port bring up,
- * Zephyr is being booted by the Espressif bootloader.  With it, the C stack
- * is already set up.
- */
-void __attribute__((section(".iram1"))) __esp_platform_start(void)
+void IRAM_ATTR __esp_platform_app_start(void)
 {
-	__asm__ __volatile__("la t0, _esp32c3_vector_table\n"
-						"csrw mtvec, t0\n");
-
-	z_bss_zero();
-
-	/* Disable normal interrupts. */
-	csr_read_clear(mstatus, MSTATUS_MIE);
-
 	esp_reset_reason_init();
 
-#ifndef CONFIG_MCUBOOT
-	/* ESP-IDF 2nd stage bootloader enables RTC WDT to check on startup sequence
-	 * related issues in application. Hence disable that as we are about to start
-	 * Zephyr environment.
-	 */
-	wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
-
-	wdt_hal_write_protect_disable(&rtc_wdt_ctx);
-	wdt_hal_disable(&rtc_wdt_ctx);
-	wdt_hal_write_protect_enable(&rtc_wdt_ctx);
-
-	/* Enable wireless phy subsystem clock,
-	 * This needs to be done before the kernel starts
-	 */
-	REG_CLR_BIT(SYSTEM_WIFI_CLK_EN_REG, SYSTEM_WIFI_CLK_SDIOSLAVE_EN);
-	SET_PERI_REG_MASK(SYSTEM_WIFI_CLK_EN_REG, SYSTEM_WIFI_CLK_EN);
-
 	esp_timer_early_init();
 
-	esp_mspi_pin_init();
+	esp_flash_config();
 
-	esp_flash_app_init();
+	esp_intr_initialize();
 
-	esp_mmu_map_init();
+	/* Start Zephyr */
+	z_cstart();
 
-#endif /* !CONFIG_MCUBOOT */
+	CODE_UNREACHABLE;
+}
 
-	/*Initialize the esp32c3 interrupt controller */
+void IRAM_ATTR __esp_platform_mcuboot_start(void)
+{
 	esp_intr_initialize();
 
 	/* Start Zephyr */

soc/espressif/esp32c3/soc.h

@@ -18,7 +18,8 @@
 
 #ifndef _ASMLANGUAGE
 
-void __esp_platform_start(void);
+void __esp_platform_mcuboot_start(void);
+void __esp_platform_app_start(void);
 
 static inline uint32_t esp_core_id(void)
 {

soc/espressif/esp32c3/vectors.S

@@ -22,12 +22,12 @@ GTEXT(_isr_wrapper)
 	 * only uses the 24 MSBs of the MTVEC, i.e. (MTVEC & 0xffffff00).
 	 */
 
-  .global  _esp32c3_vector_table
+  .global  _esp_vector_table
  	.section .exception_vectors.text
   .balign   0x100
-	.type     _esp32c3_vector_table, @function
+	.type     _esp_vector_table, @function
 
-_esp32c3_vector_table:
+_esp_vector_table:
 	.option push
 	.option norvc
 	.rept (32)

soc/espressif/esp32c6/hw_init.c

@@ -75,13 +75,6 @@ int hardware_init(void)
 	print_banner();
 #endif /* CONFIG_ESP_CONSOLE */
 
-	spi_flash_init_chip_state();
-	err = esp_flash_init_default_chip();
-	if (err != 0) {
-		ESP_EARLY_LOGE(TAG, "Failed to init flash chip, error %d", err);
-		return err;
-	}
-
 	cache_hal_init();
 	mmu_hal_init();
 

soc/espressif/esp32c6/soc.c

@@ -1,73 +1,39 @@
 /*
- * Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2023-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* Include esp-idf headers first to avoid redefining BIT() macro */
-#include <soc/timer_group_reg.h>
-#include <soc/ext_mem_defs.h>
-#include <soc/gpio_reg.h>
-#include <soc/system_reg.h>
-#include "hal/wdt_hal.h"
-#include "esp_cpu.h"
-#include "hal/soc_hal.h"
-#include "hal/cpu_hal.h"
-#include "esp_timer.h"
-#include "esp_private/system_internal.h"
-#include "esp_clk_internal.h"
-#include <soc/interrupt_reg.h>
-#include <esp_private/spi_flash_os.h>
-#include "esp_private/esp_mmu_map_private.h"
-#include <esp_flash_internal.h>
-
+#include <soc.h>
+#include <soc_init.h>
+#include <flash_init.h>
+#include <esp_private/cache_utils.h>
+#include <esp_private/system_internal.h>
+#include <esp_timer.h>
 #include <zephyr/drivers/interrupt_controller/intc_esp32c3.h>
-
 #include <zephyr/kernel_structs.h>
 #include <kernel_internal.h>
-#include <string.h>
-#include <zephyr/toolchain/gcc.h>
-#include <soc.h>
-
-/*
- * This is written in C rather than assembly since, during the port bring up,
- * Zephyr is being booted by the Espressif bootloader.  With it, the C stack
- * is already set up.
- */
-void IRAM_ATTR __esp_platform_start(void)
-{
-	__asm__ __volatile__("la t0, _esp32c6_vector_table\n"
-						"csrw mtvec, t0\n");
-
-	z_bss_zero();
 
-	/* Disable normal interrupts. */
-	csr_read_clear(mstatus, MSTATUS_MIE);
+extern void esp_reset_reason_init(void);
 
+void IRAM_ATTR __esp_platform_app_start(void)
+{
 	esp_reset_reason_init();
 
-#ifndef CONFIG_MCUBOOT
-	/* ESP-IDF 2nd stage bootloader enables RTC WDT to check on startup sequence
-	 * related issues in application. Hence disable that as we are about to start
-	 * Zephyr environment.
-	 */
-	wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &LP_WDT};
-
-	wdt_hal_write_protect_disable(&rtc_wdt_ctx);
-	wdt_hal_disable(&rtc_wdt_ctx);
-	wdt_hal_write_protect_enable(&rtc_wdt_ctx);
-
 	esp_timer_early_init();
 
-	esp_mspi_pin_init();
+	esp_flash_config();
 
-	esp_flash_app_init();
+	esp_intr_initialize();
 
-	esp_mmu_map_init();
+	/* Start Zephyr */
+	z_cstart();
 
-#endif /* !CONFIG_MCUBOOT */
+	CODE_UNREACHABLE;
+}
 
-	/*Initialize the esp32c6 interrupt controller */
+void IRAM_ATTR __esp_platform_mcuboot_start(void)
+{
 	esp_intr_initialize();
 
 	/* Start Zephyr */

soc/espressif/esp32c6/soc.h

@@ -27,7 +27,8 @@
 
 #ifndef _ASMLANGUAGE
 
-void __esp_platform_start(void);
+void __esp_platform_mcuboot_start(void);
+void __esp_platform_app_start(void);
 
 static inline uint32_t esp_core_id(void)
 {

soc/espressif/esp32c6/vectors.S

@@ -22,12 +22,12 @@ GTEXT(_isr_wrapper)
 	 * only uses the 24 MSBs of the MTVEC, i.e. (MTVEC & 0xffffff00).
 	 */
 
-	.global  _esp32c6_vector_table
+	.global  _esp_vector_table
 	.section .exception_vectors.text
 	.balign   0x100
-	.type     _esp32c6_vector_table, @function
+	.type     _esp_vector_table, @function
 
-_esp32c6_vector_table:
+_esp_vector_table:
 	.option push
 	.option norvc
 	.rept (32)

soc/espressif/esp32s2/hw_init.c

@@ -57,14 +57,8 @@ int hardware_init(void)
 	print_banner();
 #endif /* CONFIG_ESP_CONSOLE */
 
-	spi_flash_init_chip_state();
-	err = esp_flash_init_default_chip();
-	if (err != 0) {
-		ESP_EARLY_LOGE(TAG, "Failed to init flash chip, error %d", err);
-		return err;
-	}
-
 	cache_hal_init();
+
 	mmu_hal_init();
 
 	/* Workaround: normal ROM bootloader exits with DROM0 cache unmasked, but 2nd bootloader

soc/espressif/esp32s2/soc.c

@@ -1,85 +1,24 @@
 /*
- * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
+ * Copyright (c) 2021-2025 Espressif Systems (Shanghai) Co., Ltd.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* Include esp-idf headers first to avoid redefining BIT() macro */
-#include "soc.h"
-#include <soc/rtc_cntl_reg.h>
-#include <soc/timer_group_reg.h>
-#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
-#include <xtensa/config/core-isa.h>
-#include <xtensa/corebits.h>
-#include <esp_private/spi_flash_os.h>
-#include <esp_private/esp_mmu_map_private.h>
-#include <esp_flash_internal.h>
-#if CONFIG_ESP_SPIRAM
-#include "psram.h"
-#endif
-
-#include <zephyr/kernel_structs.h>
-#include <kernel_internal.h>
-#include <string.h>
-#include <zephyr/toolchain.h>
-#include <zephyr/types.h>
-
+#include <soc.h>
+#include <soc_init.h>
+#include <flash_init.h>
+#include <esp_private/cache_utils.h>
 #include <esp_private/system_internal.h>
-#include <esp32s2/rom/cache.h>
-#include <soc/gpio_periph.h>
-#include <esp_cpu.h>
-#include <hal/cpu_hal.h>
-#include <hal/soc_hal.h>
-#include <hal/wdt_hal.h>
 #include <esp_timer.h>
-#include <esp_err.h>
-#include <esp_clk_internal.h>
+#include <psram.h>
+#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
 #include <zephyr/sys/printk.h>
-#include "esp_log.h"
-
-#define TAG "boot.esp32s2"
 
-extern void rtc_clk_cpu_freq_set_xtal(void);
-extern void esp_reset_reason_init(void);
 extern void z_prep_c(void);
+extern void esp_reset_reason_init(void);
 
-/*
- * This is written in C rather than assembly since, during the port bring up,
- * Zephyr is being booted by the Espressif bootloader.  With it, the C stack
- * is already set up.
- */
-void __attribute__((section(".iram1"))) __esp_platform_start(void)
+void IRAM_ATTR __esp_platform_app_start(void)
 {
-	extern uint32_t _init_start;
-
-	/* Move the exception vector table to IRAM. */
-	__asm__ __volatile__("wsr %0, vecbase" : : "r"(&_init_start));
-
-	/* Zero out BSS */
-	z_bss_zero();
-
-	/* Disable normal interrupts. */
-	__asm__ __volatile__("wsr %0, PS" : : "r"(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE));
-
-	/* Initialize the architecture CPU pointer.  Some of the
-	 * initialization code wants a valid _current before
-	 * arch_kernel_init() is invoked.
-	 */
-	__asm__ __volatile__("wsr.MISC0 %0; rsync" : : "r"(&_kernel.cpus[0]));
-
-	esp_reset_reason_init();
-
-#ifndef CONFIG_MCUBOOT
-	/* ESP-IDF 2nd stage bootloader enables RTC WDT to check on startup sequence
-	 * related issues in application. Hence disable that as we are about to start
-	 * Zephyr environment.
-	 */
-	wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
-
-	wdt_hal_write_protect_disable(&rtc_wdt_ctx);
-	wdt_hal_disable(&rtc_wdt_ctx);
-	wdt_hal_write_protect_enable(&rtc_wdt_ctx);
-
 	/*
 	 * Configure the mode of instruction cache :
 	 * cache size, cache associated ways, cache line size.
@@ -96,23 +35,17 @@ void __attribute__((section(".iram1"))) __esp_platform_start(void)
 	esp_config_data_cache_mode();
 	esp_rom_Cache_Enable_DCache(0);
 
-	esp_timer_early_init();
+	esp_reset_reason_init();
 
-	esp_mspi_pin_init();
+	esp_timer_early_init();
 
-	esp_flash_app_init();
+	esp_flash_config();
 
-	esp_mmu_map_init();
+	esp_intr_initialize();
 
 #if CONFIG_ESP_SPIRAM
 	esp_init_psram();
-#endif /* CONFIG_ESP_SPIRAM */
-
-#endif /* !CONFIG_MCUBOOT */
 
-	esp_intr_initialize();
-
-#if CONFIG_ESP_SPIRAM
 	/* Init Shared Multi Heap for PSRAM */
 	int err = esp_psram_smh_init();
 
@@ -127,6 +60,16 @@ void __attribute__((section(".iram1"))) __esp_platform_start(void)
 	CODE_UNREACHABLE;
 }
 
+void IRAM_ATTR __esp_platform_mcuboot_start(void)
+{
+	esp_intr_initialize();
+
+	/* Start Zephyr */
+	z_prep_c();
+
+	CODE_UNREACHABLE;
+}
+
 /* Boot-time static default printk handler, possibly to be overridden later. */
 int IRAM_ATTR arch_printk_char_out(int c)
 {

soc/espressif/esp32s2/soc.h

@@ -22,7 +22,8 @@
 #include <zephyr/arch/xtensa/arch.h>
 #include <stdlib.h>
 
-void __esp_platform_start(void);
+void __esp_platform_mcuboot_start(void);
+void __esp_platform_app_start(void);
 
 static inline uint32_t esp_core_id(void)
 {

soc/espressif/esp32s3/esp32s3-mp.c

@@ -191,4 +191,10 @@ int esp_appcpu_init(void)
 
 	return 0;
 }
+
+#if !defined(CONFIG_MCUBOOT)
+extern int esp_appcpu_init(void);
+SYS_INIT(esp_appcpu_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
+#endif
+
 #endif /* CONFIG_SOC_ENABLE_APPCPU */

soc/espressif/esp32s3/hw_init.c

@@ -63,14 +63,8 @@ int hardware_init(void)
 	print_banner();
 #endif /* CONFIG_ESP_CONSOLE */
 
-	spi_flash_init_chip_state();
-	err = esp_flash_init_default_chip();
-	if (err != 0) {
-		ESP_EARLY_LOGE(TAG, "Failed to init flash chip, error %d", err);
-		return err;
-	}
-
 	cache_hal_init();
+
 	mmu_hal_init();
 
 	flash_update_id();
@@ -97,6 +91,7 @@ int hardware_init(void)
 	}
 
 	check_wdt_reset();
+
 	config_wdt();
 
 	soc_random_enable();

soc/espressif/esp32s3/soc.c

@@ -1,66 +1,23 @@
 /*
  * Copyright (c) 2017 Intel Corporation
+ * Copyright (c) 2025 Espressif Systems (Shanghai) CO LTD.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* Include esp-idf headers first to avoid redefining BIT() macro */
 #include <soc.h>
-#include <soc/rtc_cntl_reg.h>
-#include <soc/timer_group_reg.h>
-#include <soc/ext_mem_defs.h>
-#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
-#include <xtensa/config/core-isa.h>
-#include <xtensa/corebits.h>
-#include <esp_private/spi_flash_os.h>
-#include <esp_private/esp_mmu_map_private.h>
-#include <esp_private/mspi_timing_tuning.h>
-#include <esp_flash_internal.h>
+#include <soc_init.h>
+#include <flash_init.h>
 #include <esp_private/cache_utils.h>
-#include <sdkconfig.h>
-
-#if CONFIG_ESP_SPIRAM
-#include "psram.h"
-#endif
-
-#include <zephyr/kernel_structs.h>
-#include <zephyr/toolchain.h>
-#include <zephyr/types.h>
-#include <zephyr/linker/linker-defs.h>
-#include <kernel_internal.h>
-#include <zephyr/sys/util.h>
-
 #include <esp_private/system_internal.h>
-#include <esp32s3/rom/cache.h>
-#include <esp32s3/rom/rtc.h>
-#include <soc/syscon_reg.h>
-#include <hal/soc_hal.h>
-#include <hal/wdt_hal.h>
-#include <hal/cpu_hal.h>
-#include <esp_cpu.h>
-#include <soc/gpio_periph.h>
-#include <esp_err.h>
 #include <esp_timer.h>
-#include <esp_clk_internal.h>
-#include <esp_app_format.h>
-
+#include <psram.h>
+#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
 #include <zephyr/sys/printk.h>
-#include "esp_log.h"
-
-#include <zephyr/drivers/flash.h>
-#include <zephyr/storage/flash_map.h>
-
-#define TAG "boot.esp32s3"
 
 extern void z_prep_c(void);
 extern void esp_reset_reason_init(void);
-extern int esp_appcpu_init(void);
 
-#ifndef CONFIG_MCUBOOT
-/*
- * This function is a container for SoC patches
- * that needs to be applied during the startup.
- */
 static void IRAM_ATTR esp_errata(void)
 {
 	/* Handle the clock gating fix */
@@ -77,32 +34,9 @@ static void IRAM_ATTR esp_errata(void)
 	Cache_Occupy_Addr(SOC_DROM_LOW, 0x4000);
 #endif
 }
-#endif /* CONFIG_MCUBOOT */
 
-/*
- * This is written in C rather than assembly since, during the port bring up,
- * Zephyr is being booted by the Espressif bootloader.  With it, the C stack
- * is already set up.
- */
-void IRAM_ATTR __esp_platform_start(void)
+void IRAM_ATTR __esp_platform_app_start(void)
 {
-	extern uint32_t _init_start;
-
-	/* Move the exception vector table to IRAM. */
-	__asm__ __volatile__("wsr %0, vecbase" : : "r"(&_init_start));
-
-	z_bss_zero();
-
-	/* Disable normal interrupts. */
-	__asm__ __volatile__("wsr %0, PS" : : "r"(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE));
-
-	/* Initialize the architecture CPU pointer.  Some of the
-	 * initialization code wants a valid _current before
-	 * arch_kernel_init() is invoked.
-	 */
-	__asm__ __volatile__("wsr.MISC0 %0; rsync" : : "r"(&_kernel.cpus[0]));
-
-#ifndef CONFIG_MCUBOOT
 	/* Configure the mode of instruction cache : cache size, cache line size. */
 	esp_config_instruction_cache_mode();
 
@@ -114,38 +48,17 @@ void IRAM_ATTR __esp_platform_start(void)
 	/* Apply SoC patches */
 	esp_errata();
 
-	/* ESP-IDF/MCUboot 2nd stage bootloader enables RTC WDT to check on startup sequence
-	 * related issues in application. Hence disable that as we are about to start
-	 * Zephyr environment.
-	 */
-	wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
-
-	wdt_hal_write_protect_disable(&rtc_wdt_ctx);
-	wdt_hal_disable(&rtc_wdt_ctx);
-	wdt_hal_write_protect_enable(&rtc_wdt_ctx);
-
 	esp_reset_reason_init();
 
 	esp_timer_early_init();
 
-	esp_mspi_pin_init();
-
-	esp_flash_app_init();
+	esp_flash_config();
 
-	mspi_timing_flash_tuning();
-
-	esp_mmu_map_init();
+	esp_intr_initialize();
 
 #if CONFIG_ESP_SPIRAM
 	esp_init_psram();
-#endif /* CONFIG_ESP_SPIRAM */
 
-#endif /* !CONFIG_MCUBOOT */
-
-	esp_intr_initialize();
-
-#if CONFIG_ESP_SPIRAM
-	/* Init Shared Multi Heap for PSRAM */
 	int err = esp_psram_smh_init();
 
 	if (err) {
@@ -159,6 +72,16 @@ void IRAM_ATTR __esp_platform_start(void)
 	CODE_UNREACHABLE;
 }
 
+void IRAM_ATTR __esp_platform_mcuboot_start(void)
+{
+	esp_intr_initialize();
+
+	/* Start Zephyr */
+	z_prep_c();
+
+	CODE_UNREACHABLE;
+}
+
 /* Boot-time static default printk handler, possibly to be overridden later. */
 int IRAM_ATTR arch_printk_char_out(int c)
 {
@@ -173,8 +96,3 @@ void sys_arch_reboot(int type)
 {
 	esp_restart_noos();
 }
-
-#if defined(CONFIG_SOC_ENABLE_APPCPU) && !defined(CONFIG_MCUBOOT)
-extern int esp_appcpu_init(void);
-SYS_INIT(esp_appcpu_init, POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
-#endif

soc/espressif/esp32s3/soc.h

@@ -25,7 +25,8 @@
 #include <xtensa/core-macros.h>
 #include <esp_private/esp_clk.h>
 
-void __esp_platform_start(void);
+void __esp_platform_mcuboot_start(void);
+void __esp_platform_app_start(void);
 
 static inline void esp32_set_mask32(uint32_t v, uint32_t mem_addr)
 {

west.yml

@@ -162,7 +162,7 @@ manifest:
       groups:
         - hal
     - name: hal_espressif
-      revision: 970156407d42c968c50d4b2e3c85c0c548bd9a9e
+      revision: a459b40356f5e6fb55d92bcb458cec45365d5ec5
       path: modules/hal/espressif
       west-commands: west/west-commands.yml
       groups: