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