This git repository shows a simple example for an ARM Bare-Metal implementation with gem5. It can be used as a starting point for bare metal projects with this simulator. For more information on gem5 please look at: gem5.org.
To install the toolchain on Mac OSX you can yous macports:
sudo port install arm-none-eabi-gcc
sudo port install arm-none-eabi-gdb
or Homebrew:
brew tap PX4/homebrew-px4
brew update
brew install gcc-arm-none-eabi
on Linux based systems (e.g. Debian):
apt-get install gcc-arm-none-eabi
To compile the example software set a proper path to you bare metal toolchain in the Makefile.
make
To run the software in gem5 do the following steps:
export M5_PATH="/path/to/gem5.bare-metal/"
For the simple example:
./build/ARM/gem5.opt \
./configs/example/fs.py \
--bare-metal \
--disk-image=/path/to/gem5.bare-metal/common/fake.iso \
--kernel=/path/to/gem5.bare-metal/simple/main.elf \
--machine-type=RealView_PBX \
--dtb-filename=none \
--mem-size=256MB
For the interrupt example:
./build/ARM/gem5.opt \
./configs/example/fs.py \
--bare-metal \
--disk-image=/path/to/gem5.bare-metal/common/fake.iso \
--kernel=/path/to/gem5.bare-metal/interrupt/main.elf \
--machine-type=RealView_PBX \
--dtb-filename=none \
--mem-size=256MB
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Authors: Matthias Jung