esp32[c3]: Add mcuboot build script for esp32c3-legacy

arch/risc-v/src/esp32c3-legacy/Bootloader.mk

@@ -125,7 +125,7 @@ $(MCUBOOT_SRCDIR):
 
 $(BOOTLOADER_BIN): chip/$(ESP_HAL_3RDPARTY_REPO) $(MCUBOOT_SRCDIR) $(BOOTLOADER_CONFIG)
 	$(Q) echo "Building Bootloader"
-	$(Q) $(TOOLSDIR)/build_mcuboot.sh \
+	$(Q) $(TOOLSDIR)/build_mcuboot_esp32c3_legacy.sh \
 		-c esp32c3 \
 		-f $(BOOTLOADER_CONFIG) \
 		-p $(BOOTLOADER_DIR) \

tools/espressif/build_mcuboot_esp32c3_legacy.sh

@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+
+SCRIPT_NAME=$(basename "${BASH_SOURCE[0]}")
+
+usage() {
+  echo ""
+  echo "USAGE: ${SCRIPT_NAME} [-h] -c <chip> -f <config> -p <path> -e <hal>"
+  echo ""
+  echo "Where:"
+  echo "  -c <chip> Target chip"
+  echo "  -f <config> Path to file containing configuration options"
+  echo "  -p <path> Path to execute the script"
+  echo "  -e <hal> Path to HAL directory"
+  echo "  -h Show usage and terminate"
+  echo ""
+}
+
+build_mcuboot() {
+  local target=${1}
+  local config=${2}
+  local mcuboot_dir="${exec_path}/mcuboot"
+  local build_dir=".build-${target}"
+  local source_dir="boot/espressif"
+  local output_dir="${exec_path}/out"
+  local toolchain_file="tools/toolchain-${target}.cmake"
+  local mcuboot_config
+  local mcuboot_flashsize
+  local mcuboot_flashmode
+  local mcuboot_flashfreq
+  local make_generator
+
+  mcuboot_config=$(realpath "${config:-${exec_path}/mcuboot.conf}")
+
+  # Try parsing Flash parameters from the mcuboot config file.
+  # If not found, let's assume some commonplace values.
+
+  mcuboot_flashsize=$(sed -n 's/^CONFIG_ESPTOOLPY_FLASHSIZE_\(.*\)MB=1/\1MB/p' "${mcuboot_config}")
+  if [ -z "${mcuboot_flashsize}" ]; then
+    mcuboot_flashsize="4MB"
+  fi
+
+  mcuboot_flashmode=$(sed -n 's/^CONFIG_ESPTOOLPY_FLASHMODE_\(.*\)=1/\L\1/p' "${mcuboot_config}")
+  if [ -z "${mcuboot_flashmode}" ]; then
+    mcuboot_flashmode="dio"
+  fi
+
+  mcuboot_flashfreq=$(sed -n 's/^CONFIG_ESPTOOLPY_FLASHFREQ_\(.*\)M=1/\1m/p' "${mcuboot_config}")
+  if [ -z "${mcuboot_flashfreq}" ]; then
+    mcuboot_flashfreq="40m"
+  fi
+
+  pushd "${exec_path}" &>/dev/null
+  mkdir -p "${output_dir}" &>/dev/null
+
+  # Build with Ninja if installed
+
+  if command -v ninja &>/dev/null; then
+    make_generator="-GNinja"
+  fi
+
+  # Build bootloader for selected target
+
+  cd "${mcuboot_dir}" &>/dev/null
+  cmake -DCMAKE_TOOLCHAIN_FILE="${toolchain_file}"     \
+        -DMCUBOOT_TARGET="${target}"                   \
+        -DMCUBOOT_CONFIG_FILE="${mcuboot_config}"      \
+        -DESP_HAL_PATH="${esp_hal}"                    \
+        -DCONFIG_ESP_FLASH_SIZE="${mcuboot_flashsize}" \
+        -DESP_FLASH_MODE="${mcuboot_flashmode}"        \
+        -DESP_FLASH_FREQ="${mcuboot_flashfreq}"        \
+        -B "${build_dir}"                              \
+        "${make_generator}"                            \
+        "${source_dir}"
+  cmake --build "${build_dir}"/
+
+  # Copy bootloader binary file to output directory
+
+  cp "${build_dir}"/mcuboot_"${target}".bin "${output_dir}"/mcuboot-"${target}".bin &>/dev/null
+
+  # Remove build directory
+
+  rm -rf "${build_dir}" &>/dev/null
+
+  popd &>/dev/null
+}
+
+while getopts ":hc:f:p:e:" arg; do
+  case "${arg}" in
+    c)
+      chip=${OPTARG}
+      ;;
+    f)
+      config=${OPTARG}
+      ;;
+    p)
+      exec_path=${OPTARG}
+      ;;
+    e)
+      esp_hal=${OPTARG}
+      ;;
+    h)
+      usage
+      exit 0
+      ;;
+    *)
+      usage
+      exit 1
+      ;;
+  esac
+done
+
+if [ -z "${chip}" ]; then
+  printf "ERROR: Missing target chip.\n"
+  usage
+  exit 1
+fi
+
+if ! [ -d "${esp_hal}" ]; then
+  printf "ERROR: Invalid HAL path.\n"
+  usage
+  exit 1
+fi
+
+if [ ! -d "${exec_path}" ]; then
+  printf "ERROR: Invalid exec path.\n"
+  usage
+  exit 1
+fi
+
+if [ -n "${config}" ] && [ ! -f "${config}" ]; then
+  printf "ERROR: Configuration file %s not found.\n" "${config}"
+  usage
+  exit 1
+fi
+
+build_mcuboot "${chip}" "${config}"