Changes to support Raspberry Pi

.gitmodules

@@ -1,3 +1,3 @@
-[submodule "assignment-autotest"]
-	path = assignment-autotest
-	url = https://github.com/cu-ecen-5013/assignment-autotest
+[submodule "buildroot"]
+	path = buildroot
+	url = https://github.com/buildroot/buildroot.git

README.md

@@ -1,5 +1,29 @@
-# Overview
+# buildroot-rpi
 
 This repository contains assignment starter code for buildroot based assignments for the course Advanced Embedded Software Design, ECEN 5713
 
-It also contains instructions related to modifying your buildroot project to use with supported hardware platforms.  See [this wiki page](https://github.com/cu-ecen-5013/buildroot-assignments-base/wiki/Supported-Hardware) for details.
+We will be using rpi3
+
+Configuration of rpi  for Buildroot:
+----------------------------
+Other configuration of rpi:
+----------------------------
+For models A, B, A+ or B+:
+
+  $ make raspberrypi_defconfig
+
+For model Zero (model A+ in smaller form factor):
+
+  $ make raspberrypi0_defconfig
+
+For model 2 B:
+
+  $ make raspberrypi2_defconfig
+
+For model 3 B and B+:
+
+  $ make raspberrypi3_defconfig
+
+For model 4 B:
+
+  $ make raspberrypi4_defconfig

base_external/configs/aesd_rpi_defconfig

@@ -0,0 +1,26 @@
+BR2_arm=y
+BR2_cortex_a53=y
+BR2_ARM_FPU_NEON_VFPV4=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_SYSTEM_DHCP="eth0"
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi3/post-build.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi3/post-image.sh"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,0b54dbda3cca2beb51e236a25738784e90853b64)/linux-0b54dbda3cca2beb51e236a25738784e90853b64.tar.gz"
+BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2710-rpi-3-b bcm2710-rpi-3-b-plus bcm2710-rpi-cm3"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_PACKAGE_RPI_FIRMWARE=y
+BR2_PACKAGE_RPI_FIRMWARE_BOOTCODE_BIN=y
+BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI=y
+BR2_PACKAGE_RPI_FIRMWARE_CONFIG_FILE="board/raspberrypi3/config_3.txt"
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y

base_external/external.desc

@@ -0,0 +1,2 @@
+name: assignment_base
+description: Base customization for assignment

base_external/external.mk

@@ -0,0 +1 @@
+include $(sort $(wildcard $(BR2_EXTERNAL_assignment_base_PATH)/package/*/*.mk))

conf/assignment.txt

@@ -1 +1 @@
-assignment4-buildroot
+final-project

runqemu-rpi.sh

@@ -0,0 +1,34 @@
+# Shell script to start Raspberry Pi 3 (64-bit) on QEMU
+#!/bin/sh
+
+KERNEL="buildroot/output/images/Image"
+DTB="buildroot/output/images/bcm2710-rpi-3-b.dtb" 
+ROOTFS="buildroot/output/images/rootfs.ext2"
+
+if [ ! -e $KERNEL ]
+then
+	echo "$KERNEL does not exist"
+	exit 1
+fi
+
+if [ ! -e $DTB ]
+then
+	echo "$DTB does not exist"
+	exit 1
+fi
+
+if [ ! -e $ROOTFS ]
+then
+	echo "$ROOTFS does not exist"
+	exit 1
+fi
+
+
+qemu-system-aarch64 \
+	-M raspi3 \
+	-kernel $KERNEL \
+	-dtb $DTB \
+	-m 1024 -nographic \
+	-append "rw console=ttyAMA0,115200 root=/dev/mmcblk0 fsck.repair=yes rootwait" \
+	-device sd-card,drive=mycard -drive if=none,file=$ROOTFS,format=raw,id=mycard
+

shared.sh

@@ -3,9 +3,17 @@
 
 # The defconfig from the buildroot directory we use for qemu builds
 QEMU_DEFCONFIG=configs/qemu_aarch64_virt_defconfig
+# The default hardware platform, when building for hardware
+RPI_DEFCONFIG=configs/raspberrypi3_defconfig
 # The place we store customizations to the qemu configuration
 MODIFIED_QEMU_DEFCONFIG=base_external/configs/aesd_qemu_defconfig
+# The place we store customizations for the project current target
+
+# The place we store customizations to the rpi configuration
+MODIFIED_RPI_DEFCONFIG=base_external/configs/aesd_rpi_defconfig
+
+
 # The defconfig from the buildroot directory we use for the project
-AESD_DEFAULT_DEFCONFIG=${QEMU_DEFCONFIG}
-AESD_MODIFIED_DEFCONFIG=${MODIFIED_QEMU_DEFCONFIG}
+AESD_DEFAULT_DEFCONFIG=${RPI_DEFCONFIG}
+AESD_MODIFIED_DEFCONFIG=${MODIFIED_RPI_DEFCONFIG}
 AESD_MODIFIED_DEFCONFIG_REL_BUILDROOT=../${AESD_MODIFIED_DEFCONFIG}