On Wed, Dec 29, 2021 at 2:20 PM Davis Roman <[email protected]> wrote:
> 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? Yes it’s supported although it’s not default for qemumips so the simple trick you can do is change the DEFAULTTUNE setting in the qemumips.conf away from mips32r2 > > > > > > Regards, > > Anders Montonen >
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