On Wed, Dec 29, 2021 at 2:21 PM Anders Montonen <[email protected]> wrote: > > Hi, > > > On 29 Dec 2021, at 9:53, davis roman <[email protected]> wrote: > > > > I generated an internal mips toolchain built against musl and I tried > > to compile u-boot but unfortunately, I'm getting "opcode not > > supported" error messages. https://pastebin.com/QdcLxy69 > > If instead I use the realtek provided prebuilt toolchain then u-boot > > compiles successfully. https://pastebin.com/zcQ5kc20 > > > > I'm thinking that Realtek's toolchain has patches specific to their > > SoC that have not been pushed upstream. Could this be the reason I'm > > unable to compile uboot? > > I’m guessing that your U-Boot config doesn’t set the correct MIPS > architecture revision. The compiler error shows that you’re trying to > assemble a MIPS32r1 instruction, but the compiler is targeting the original > MIPS1 architecture. The Realtek toolchain may have set the default > architecture to match the SoC, but the fix is to update the config to match > the hardware.
You're right. I didn't realize the RX5281 core on the RTS3916N only supports mips1 or mips16 (https://pasteboard.co/IpsqN6GkBYAs.png). I happened to have a mips sourcery toolchain installed on my machine (https://sourcery.sw.siemens.com/GNUToolchain/package12797/public/mips-linux-gnu/mips-2014.05-27-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2) so I pointed that to u-boot without modifying anything else and it was able to compile u-boot successfully. Woot! https://pastebin.com/ySPFae5u I suppose the next step would be to generate a mips1 yocto toolchain however according to the available tune values it appears only mips32 or mips64 is available Any suggestions on how to generate a mips1 yocto toolchain or if that's even supported? > > Regards, > Anders Montonen
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