soc: esp32c3: prepare kconfigs and cmake to support mcuboot

This modifies esp32c3 SOC configuration to support MCUBoot.

CmakeLists is moved from board to soc specific. It also
includes MCUBoot changes.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

boards/riscv/esp32c3_devkitm/CMakeLists.txt

@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD
-	default "esp32c3"
+	default "esp32c3_devkitm"
 	depends on BOARD_ESP32C3_DEVKITM
 
 config ENTROPY_ESP32_RNG

boards/riscv/esp32c3_devkitm/Kconfig.defconfig

@@ -8,7 +8,6 @@ CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
 CONFIG_CONSOLE=y
 CONFIG_SERIAL=y
 CONFIG_UART_CONSOLE=y
-CONFIG_XIP=n
 CONFIG_PINMUX=y
 CONFIG_PINMUX_ESP32=y
 CONFIG_GPIO=y

boards/riscv/esp32c3_devkitm/esp32c3_devkitm_defconfig

@@ -6,4 +6,79 @@ zephyr_sources(
   soc_irq.S
   soc_irq.c
   soc.c
+  loader.c
   )
+
+if(CONFIG_BOOTLOADER_ESP_IDF)
+  include(ExternalProject)
+
+  ## we use hello-world project, but I think any can be used.
+  set(espidf_components_dir   ${ESP_IDF_PATH}/components)
+  set(espidf_prefix    ${CMAKE_BINARY_DIR}/esp-idf)
+  set(espidf_build_dir ${espidf_prefix}/build)
+
+  ExternalProject_Add(
+    EspIdfBootloader
+    PREFIX ${espidf_prefix}
+    SOURCE_DIR ${espidf_components_dir}/bootloader/subproject
+    BINARY_DIR ${espidf_build_dir}/bootloader
+    CONFIGURE_COMMAND
+    ${CMAKE_COMMAND} -G${CMAKE_GENERATOR}
+    -S ${espidf_components_dir}/bootloader/subproject
+    -B ${espidf_build_dir}/bootloader -DSDKCONFIG=${espidf_build_dir}/sdkconfig
+    -DIDF_PATH=${ESP_IDF_PATH} -DIDF_TARGET=${CONFIG_SOC}
+    -DPYTHON_DEPS_CHECKED=1
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+    -DCMAKE_ASM_COMPILER=${CMAKE_ASM_COMPILER}
+    -DCMAKE_SYSTEM_NAME=${CMAKE_SYSTEM_NAME}
+    -DPYTHON=${PYTHON_EXECUTABLE}
+    BUILD_COMMAND
+    ${CMAKE_COMMAND} --build .
+    INSTALL_COMMAND ""      # This particular build system has no install command
+    )
+
+  ExternalProject_Add(
+    EspPartitionTable
+    SOURCE_DIR ${espidf_components_dir}/partition_table
+    BINARY_DIR ${espidf_build_dir}
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND
+    ${PYTHON_EXECUTABLE} ${ESP_IDF_PATH}/components/partition_table/gen_esp32part.py -q
+    --offset 0x8000 --flash-size 4MB ${ESP_IDF_PATH}/components/partition_table/partitions_singleapp.csv ${espidf_build_dir}/partitions_singleapp.bin
+    INSTALL_COMMAND ""
+    )
+
+  if(CONFIG_BUILD_OUTPUT_BIN)
+    set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
+      COMMAND ${PYTHON_EXECUTABLE} ${ESP_IDF_PATH}/components/esptool_py/esptool/esptool.py
+      ARGS --chip esp32c3 elf2image --flash_mode dio --flash_freq 40m
+      -o ${CMAKE_BINARY_DIR}/zephyr/${CONFIG_KERNEL_BIN_NAME}.bin
+      ${CMAKE_BINARY_DIR}/zephyr/${CONFIG_KERNEL_BIN_NAME}.elf)
+  endif()
+
+  set_property(TARGET bintools PROPERTY disassembly_flag_inline_source)
+
+  add_dependencies(app EspIdfBootloader EspPartitionTable)
+
+  board_finalize_runner_args(esp32 "--esp-flash-bootloader=${espidf_build_dir}/bootloader/bootloader.bin")
+
+  board_finalize_runner_args(esp32 "--esp-flash-partition_table=${espidf_build_dir}/partitions_singleapp.bin")
+
+  board_finalize_runner_args(esp32 "--esp-boot-address=0x0000")
+
+  board_finalize_runner_args(esp32 "--esp-partition-table-address=0x8000")
+
+  board_finalize_runner_args(esp32 "--esp-app-address=0x10000")
+
+endif()
+
+if(CONFIG_BOOTLOADER_MCUBOOT)
+
+  # get code-partition slot0 address
+  dt_nodelabel(dts_partition_path NODELABEL "slot0_partition")
+  dt_reg_addr(img_0_off PATH ${dts_partition_path})
+
+  board_finalize_runner_args(esp32 "--esp-app-address=${img_0_off}")
+
+endif()

soc/riscv/esp32c3/CMakeLists.txt

@@ -5,6 +5,25 @@
 
 if SOC_ESP32C3
 
+if BOOTLOADER_MCUBOOT
+
+config HAS_FLASH_LOAD_OFFSET
+	default y
+
+config XIP
+	default y
+
+config MCUBOOT_GENERATE_UNSIGNED_IMAGE
+	default y
+
+config MCUBOOT_GENERATE_CONFIRMED_IMAGE
+	default y
+
+config ROM_START_OFFSET
+	default 0x20
+
+endif
+
 config SOC
 	default "esp32c3"
 
@@ -23,9 +42,6 @@ config GEN_IRQ_VECTOR_TABLE
 config DYNAMIC_INTERRUPTS
 	default y
 
-config XIP
-	default n
-
 config ISR_STACK_SIZE
 	default 2048
 

soc/riscv/esp32c3/Kconfig.defconfig

@@ -18,8 +18,3 @@ config ESPTOOLPY_FLASHFREQ_80M
 	bool
 	default y
 	depends on SOC_ESP32C3
-
-config BOOTLOADER_ESP_IDF
-	bool "Use esp-idf 2nd stage bootloader"
-	default y
-	depends on SOC_ESP32C3