soc: esp32: virtual e-fuses support

Adds support for virtual e-fuses on esp32 socs

Signed-off-by: Marcio Ribeiro <marcio.ribeiro@espressif.com>
This commit is contained in:
Marcio Ribeiro 2025-05-09 16:55:46 -03:00 committed by Benjamin Cabé
commit 77c350c149
9 changed files with 86 additions and 0 deletions

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@ -62,6 +62,7 @@ endif
rsource "Kconfig.amp"
rsource "Kconfig.console"
rsource "Kconfig.efuse"
rsource "Kconfig.spiram"
rsource "Kconfig.esptool"
rsource "Kconfig.flash"

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@ -0,0 +1,47 @@
# Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
# SPDX-License-Identifier: Apache-2.0
if SOC_FAMILY_ESPRESSIF_ESP32
config ESP32_EFUSE_VIRTUAL
bool "Simulate eFuse operations in RAM"
help
If "y" - The virtual mode is enabled and all eFuse operations (read and write) are redirected
to RAM instead of eFuse registers, all permanent changes (via eFuse) are disabled.
If it is "y", then SECURE_FLASH_ENCRYPTION_MODE_RELEASE cannot be used.
Because the EFUSE VIRT mode is for testing only.
During startup, the eFuses are copied into RAM. This mode is useful for fast tests.
config ESP32_EFUSE_VIRTUAL_KEEP_IN_FLASH
bool "Keep eFuses in flash"
depends on ESP32_EFUSE_VIRTUAL
help
In addition to the "Simulate eFuse operations in RAM" option, this option just adds
a feature to keep eFuses after reboots in flash memory. To use this mode the partition_table
should have the `sys_partition` partition.
During startup, the eFuses are copied from flash or,
in case if flash is empty, from real eFuse to RAM and then update flash.
This mode is useful when need to keep changes after reboot
(testing secure_boot and flash_encryption).
config ESP32_EFUSE_VIRTUAL_OFFSET
hex
depends on ESP32_EFUSE_VIRTUAL_KEEP_IN_FLASH
default $(dt_nodelabel_reg_addr_hex,sys_partition) if $(dt_nodelabel_exists,sys_partition)
default 0x0
config ESP32_EFUSE_VIRTUAL_SIZE
hex
depends on ESP32_EFUSE_VIRTUAL_KEEP_IN_FLASH
default 0x2000 if $(dt_nodelabel_exists,sys_partition)
default 0x0
config ESP32_EFUSE_MAX_BLK_LEN
int
default 192 if SOC_SERIES_ESP32
default 256
endif # SOC_FAMILY_ESPRESSIF_ESP32

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@ -0,0 +1,20 @@
/*
* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <esp_efuse.h>
static inline void esp_efuse_init_virtual(void)
{
#if CONFIG_ESP32_EFUSE_VIRTUAL
#if CONFIG_ESP32_EFUSE_VIRTUAL_KEEP_IN_FLASH
esp_efuse_init_virtual_mode_in_flash(CONFIG_ESP32_EFUSE_VIRTUAL_OFFSET,
CONFIG_ESP32_EFUSE_VIRTUAL_SIZE);
#else
esp_efuse_init_virtual_mode_in_ram();
#endif
#endif
}

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@ -11,6 +11,7 @@
#include <esp_private/cache_utils.h>
#include <esp_private/system_internal.h>
#include <esp_timer.h>
#include <efuse_virtual.h>
#include <psram.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <zephyr/sys/printk.h>
@ -26,6 +27,8 @@ void IRAM_ATTR __esp_platform_app_start(void)
esp_flash_config();
esp_efuse_init_virtual();
#if CONFIG_ESP_SPIRAM
esp_init_psram();

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@ -10,6 +10,7 @@
#include <esp_private/cache_utils.h>
#include <esp_private/system_internal.h>
#include <esp_timer.h>
#include <efuse_virtual.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <zephyr/kernel_structs.h>
#include <kernel_internal.h>
@ -24,6 +25,8 @@ void IRAM_ATTR __esp_platform_app_start(void)
esp_flash_config();
esp_efuse_init_virtual();
/* Start Zephyr */
z_cstart();

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@ -11,6 +11,7 @@
#include <esp_private/cache_utils.h>
#include <esp_private/system_internal.h>
#include <esp_timer.h>
#include <efuse_virtual.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <zephyr/kernel_structs.h>
#include <kernel_internal.h>
@ -25,6 +26,8 @@ void IRAM_ATTR __esp_platform_app_start(void)
esp_flash_config();
esp_efuse_init_virtual();
/* Start Zephyr */
z_cstart();

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@ -10,6 +10,7 @@
#include <esp_private/cache_utils.h>
#include <esp_private/system_internal.h>
#include <esp_timer.h>
#include <efuse_virtual.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <zephyr/kernel_structs.h>
#include <kernel_internal.h>
@ -24,6 +25,8 @@ void IRAM_ATTR __esp_platform_app_start(void)
esp_flash_config();
esp_efuse_init_virtual();
/* Start Zephyr */
z_cstart();

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@ -10,6 +10,7 @@
#include <esp_private/cache_utils.h>
#include <esp_private/system_internal.h>
#include <esp_timer.h>
#include <efuse_virtual.h>
#include <psram.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <zephyr/sys/printk.h>
@ -41,6 +42,8 @@ void IRAM_ATTR __esp_platform_app_start(void)
esp_flash_config();
esp_efuse_init_virtual();
#if CONFIG_ESP_SPIRAM
esp_init_psram();

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@ -11,6 +11,7 @@
#include <esp_private/cache_utils.h>
#include <esp_private/system_internal.h>
#include <esp_timer.h>
#include <efuse_virtual.h>
#include <psram.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <zephyr/sys/printk.h>
@ -54,6 +55,8 @@ void IRAM_ATTR __esp_platform_app_start(void)
esp_flash_config();
esp_efuse_init_virtual();
#if CONFIG_ESP_SPIRAM
esp_init_psram();