Support to run NuttX on ESP32 QEMU

boards/xtensa/esp32/esp32-core/configs/nsh/defconfig

@@ -48,6 +48,7 @@ CONFIG_START_DAY=6
 CONFIG_START_MONTH=12
 CONFIG_START_YEAR=2011
 CONFIG_SUPPRESS_CLOCK_CONFIG=y
+CONFIG_SUPPRESS_UART_CONFIG=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_NSH_CXXINITIALIZE=y
 CONFIG_UART0_SERIAL_CONSOLE=y

boards/xtensa/esp32/esp32-core/configs/ostest/defconfig

@@ -42,6 +42,7 @@ CONFIG_START_DAY=6
 CONFIG_START_MONTH=12
 CONFIG_START_YEAR=2011
 CONFIG_SUPPRESS_CLOCK_CONFIG=y
+CONFIG_SUPPRESS_UART_CONFIG=y
 CONFIG_SYSTEM_READLINE=y
 CONFIG_TESTING_OSTEST=y
 CONFIG_TESTING_OSTEST_LOOPS=10

boards/xtensa/esp32/esp32-core/configs/smp/defconfig

@@ -58,6 +58,7 @@ CONFIG_START_DAY=6
 CONFIG_START_MONTH=12
 CONFIG_START_YEAR=2011
 CONFIG_SUPPRESS_CLOCK_CONFIG=y
+CONFIG_SUPPRESS_UART_CONFIG=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_NSH_CXXINITIALIZE=y
 CONFIG_SYSTEM_TASKSET=y

boards/xtensa/esp32/esp32-core/scripts/Config.mk

@@ -0,0 +1,49 @@
+############################################################################
+# boards/xtensa/esp32/esp32-core/scripts/Config.mk
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http:https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+# These are the macros that will be used in the NuttX make system to compile
+# and assembly source files and to insert the resulting object files into an
+# archive. These replace the default definitions at tools/Config.mk
+
+# POSTBUILD -- Perform post build operations
+
+define POSTBUILD
+ @echo "MKIMAGE: ESP32 binary"
+ $(Q) if ! esptool.py version ; then \
+ echo ""; \
+ echo "Please install ESP-IDF tools"; \
+ echo ""; \
+ echo "Check https://docs.espressif.com/projects/esp-idf/en/v4.0/get-started/index.html#installation-step-by-step or run the following command"; \
+ echo ""; \
+ echo "cd tools/esp32 && make && cd ../.."; \
+ echo ""; \
+ echo "run make again to create the nuttx.bin image."; \
+ else \
+ echo "Generating: $(NUTTXNAME).bin (ESP32 compatible)"; \
+ esptool.py --chip esp32 elf2image --flash_mode dio --flash_size 4MB -o nuttx.bin nuttx; \
+ echo "Generated: $(NUTTXNAME).bin (ESP32 compatible)"; \
+ echo "Generating: flash_image.bin"; \
+ dd if=/dev/zero bs=1024 count=4096 of=flash_image.bin && \
+ dd if=$(IDF_PATH)/hello_world/build/bootloader/bootloader.bin bs=1 seek=$(shell printf "%d" 0x1000) of=flash_image.bin conv=notrunc && \
+ dd if=$(IDF_PATH)/hello_world/build/partition_table/partition-table.bin bs=1 seek=$(shell printf "%d" 0x8000) of=flash_image.bin conv=notrunc && \
+ dd if=$(NUTTXNAME).bin bs=1 seek=$(shell printf "%d" 0x10000) of=flash_image.bin conv=notrunc && \
+ echo "Generated: flash_image.bin (it can be run with 'qemu-system-xtensa -nographic -machine esp32 -drive file=flash_image.bin,if=mtd,format=raw')"; \
+ fi
+endef

boards/xtensa/esp32/esp32-core/scripts/Make.defs

@@ -35,6 +35,7 @@
 
 include ${TOPDIR}/.config
 include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}/boards/xtensa/esp32/esp32-core/scripts/Config.mk
 include ${TOPDIR}/arch/xtensa/src/lx6/Toolchain.defs
 
 LDSCRIPT1 = $(TOPDIR)/boards/$(CONFIG_ARCH)/$(CONFIG_ARCH_CHIP)/$(CONFIG_ARCH_BOARD)/scripts/esp32_out.ld

tools/esp32/Makefile

@@ -0,0 +1,80 @@
+############################################################################
+# tools/esp32/Makefile
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http:https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ESP_PATH = ${HOME}/esp
+
+IDF_PATH = ${ESP_PATH}/esp-idf
+QEMU_PATH = ${ESP_PATH}/qemu
+
+QEMU_BIN = ${QEMU_PATH}/xtensa-softmmu/qemu-system-xtensa
+QEMU_LINK = ${IDF_PATH}/tools/qemu-system-xtensa
+
+BOOTLOADER_BIN = ${IDF_PATH}/hello_world/build/bootloader/bootloader.bin
+PARTITION_TABLE_BIN = ${IDF_PATH}/hello_world/build/partition_table/partition-table.bin
+
+all: ${IDF_PATH} ${BOOTLOADER_BIN} ${PARTITION_TABLE_BIN} ${QEMU_BIN} ${QEMU_LINK}
+default: all
+.PHONY: clean esp-idf-hello-world
+
+# Add CFLAGS=-g on the make command line to build debug versions
+
+CFLAGS = -O2 -Wall -I.
+
+${IDF_PATH}:
+ mkdir -p ${ESP_PATH}
+ echo "WARNING:this directory can be automatically removed" > ${ESP_PATH}/README
+ cd ${ESP_PATH} && \
+ ls esp-idf || git clone -b master --recursive https://github.com/espressif/esp-idf.git && \
+ cd ${IDF_PATH} && \
+ ./install.sh
+
+${IDF_PATH}/hello_world:
+ cp -r ${IDF_PATH}/examples/get-started/hello_world ${IDF_PATH}/hello_world
+
+${IDF_PATH}/hello_world/build: SHELL:=/usr/bin/env bash
+${IDF_PATH}/hello_world/build: ${IDF_PATH}/hello_world
+ cd ${IDF_PATH} && \
+ . export.sh && \
+ cd hello_world && \
+ idf.py menuconfig && \
+ echo "CONFIG_ESPTOOLPY_FLASHMODE_DOUT=y" >> sdkconfig && \
+ idf.py build
+
+${BOOTLOADER_BIN}: ${IDF_PATH}/hello_world/build
+
+${PARTITION_TABLE_BIN}: ${IDF_PATH}/hello_world/build
+
+${QEMU_BIN}:
+ cd ${ESP_PATH} && \
+ git clone https://github.com/espressif/qemu && \
+ cd qemu && \
+ ./configure --target-list=xtensa-softmmu \
+ --enable-debug --enable-sanitizers \
+ --disable-strip --disable-user \
+ --disable-capstone --disable-vnc \
+ --disable-sdl --disable-gtk && \
+ make -j8
+
+${QEMU_LINK}: ${QEMU_BIN}
+ ln -srf ${QEMU_BIN} ${QEMU_LINK}
+
+clean:
+ @rm -rf ${HOME}/.espressif
+ @grep "WARNING:this directory can be automatically removed" ${ESP_PATH}/README > /dev/null 2> /dev/null && rm -rf ${ESP_PATH}; echo