QEMU with STM32 Microcontroller Implementation Official Homepage: http://beckus.github.io/qemu_stm32/ OVERVIEW This is a copy of QEMU that has been modified to include an implementation of the STM32 microcontroller. It also implements an Olimex STM32_P103 developmentvboard. This project runs the demos located in the stm32_p103_demos project located at: https://github.com/beckus/stm32_p103_demos . Commands for a typical build: ./configure --enable-debug --target-list="arm-softmmu" make Useful make commands when rebuilding: make defconfig make clean If you receive a warning during compilation, this may cause the build to fail. In this case you can pass the following option to the "configure" command to ignore warnings: --disable-werror The generated executable is arm-softmmu/qemu-system-arm . Other configure options which control the STM32 implementation: --extra-cflags=-DDEBUG_CLKTREE Print out clock tree debug statements. --extra-cflags=-DDEBUG_STM32_RCC --extra-cflags=-DDEBUG_STM32_UART --extra-cflags=-DDEBUG_STM32_TIMER Print debug statements for specific peripherals. --extra-cflags=-DSTM32_UART_NO_BAUD_DELAY Disable the BAUD rate timing simulation (i.e. the UART will transmit or receive as fast as possible, rather than using a realistic delay). --extra-cflags=-DSTM32_UART_ENABLE_OVERRUN Enable setting of the overrun flag if a character is received before the last one is processed. If this is not set, the UART will not receive the next character until the previous one is read by software. Although less realisitic, this is safer in case the VM is running slow. Other QEMU configure options which are useful for troubleshooting: --extra-cflags=-DDEBUG_GIC qemu-system-arm options which are useful for trobuleshooting: -d ? To see available log levels -d unimp,guest Enable logging to view warnings when an unimplemented register is accessed or when an invalid register access is attempted. This is especially useful since many registers are not implemented. -d cpu,in_asm Enable logging to view the CPU state during execution and the ARM instructions which are being executed. I believe --enable-debug must be used for this to work. By default, you can find the output in /tmp/qemu.log: UNIT TESTING Unit test scripts are included for the STM32 implementation. These test will be executed when running "make" with the standard check targets (see tests/Makefile for documentation of QEMU's unit testing features): make check make check-qtest-arm The original QEMU README follows: Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org QEMU README =========== QEMU is a generic and open source machine & userspace emulator and virtualizer. QEMU is capable of emulating a complete machine in software without any need for hardware virtualization support. By using dynamic translation, it achieves very good performance. QEMU can also integrate with the Xen and KVM hypervisors to provide emulated hardware while allowing the hypervisor to manage the CPU. With hypervisor support, QEMU can achieve near native performance for CPUs. When QEMU emulates CPUs directly it is capable of running operating systems made for one machine (e.g. an ARMv7 board) on a different machine (e.g. an x86_64 PC board). QEMU is also capable of providing userspace API virtualization for Linux and BSD kernel interfaces. This allows binaries compiled against one architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a different architecture ABI (e.g. the Linux x86_64 ABI). This does not involve any hardware emulation, simply CPU and syscall emulation. QEMU aims to fit into a variety of use cases. It can be invoked directly by users wishing to have full control over its behaviour and settings. It also aims to facilitate integration into higher level management layers, by providing a stable command line interface and monitor API. It is commonly invoked indirectly via the libvirt library when using open source applications such as oVirt, OpenStack and virt-manager. QEMU as a whole is released under the GNU General Public License, version 2. For full licensing details, consult the LICENSE file. Building ======== QEMU is multi-platform software intended to be buildable on all modern Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety of other UNIX targets. The simple steps to build QEMU are: mkdir build cd build ../configure make Additional information can also be found online via the QEMU website: http://qemu-project.org/Hosts/Linux http://qemu-project.org/Hosts/Mac http://qemu-project.org/Hosts/W32 Submitting patches ================== The QEMU source code is maintained under the GIT version control system. git clone git://git.qemu-project.org/qemu.git When submitting patches, the preferred approach is to use 'git format-patch' and/or 'git send-email' to format & send the mail to the qemu-devel@nongnu.org mailing list. All patches submitted must contain a 'Signed-off-by' line from the author. Patches should follow the guidelines set out in the HACKING and CODING_STYLE files. Additional information on submitting patches can be found online via the QEMU website http://qemu-project.org/Contribute/SubmitAPatch http://qemu-project.org/Contribute/TrivialPatches Bug reporting ============= The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs found when running code built from QEMU git or upstream released sources should be reported via: https://bugs.launchpad.net/qemu/ If using QEMU via an operating system vendor pre-built binary package, it is preferable to report bugs to the vendor's own bug tracker first. If the bug is also known to affect latest upstream code, it can also be reported via launchpad. For additional information on bug reporting consult: http://qemu-project.org/Contribute/ReportABug Contact ======= The QEMU community can be contacted in a number of ways, with the two main methods being email and IRC - qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel - #qemu on irc.oftc.net Information on additional methods of contacting the community can be found online via the QEMU website: http://qemu-project.org/Contribute/StartHere -- End