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# The PowerPC port that runs on microwatt and qemu
This port is intended to be a minimal MicroPython port that runs in
QEMU, microwatt simulator with ghdl or microwatt on Xilinx FPGA with
potato UART.
## Building
By default the port will be built with the potato uart for microwatt:
$ make
To instead build for a machine with LPC serial, such as QEMU powernv:
$ make UART=lpc_serial
## Cross compilation for POWERPC
If you need to cross compilers you'll want to grab a powerpc64le
compiler (not powerpc or powerpc64).
On Ubuntu (18.04) you'll want:
$ apt install gcc-powerpc64le-linux-gnu
*(Use CROSS_COMPILE=powerpc64le-linux-gnu-)*
If your distro doesn't have cross compilers, you can get cross compilers here:
- https://toolchains.bootlin.com/
*(use CROSS_COMPILE=powerpc64le-buildroot-linux-gnu-)*
(Avoid musl libc as it defines __assert_fail() differently to glibc
which breaks the micropython powerpc code)
Then do:
$ make CROSS_COMPILE=<compiler prefix>
Building will produce the build/firmware.bin file which can be used
QEMU or [microwatt](https://github.com/antonblanchard/microwatt).
To run in QEMU use:
$ ./qemu-system-ppc64 -M powernv -cpu POWER9 -nographic -bios build/firmware.bin
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