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<wigyori>
hi - does someone know how to build an fsbl image for the sg2002 with a mainline toolchain i.e. gcc13 ?
<wigyori>
gcc13 drops an "Error: x ISA extension `xthead' must be set with the versions" - there is an icache.iall and sync.i call in the cpu_helper.c
<wigyori>
for the cv1800 (i.e. the milkv duo) there is a prebuilt bl2, so i can build a mainline u-boot, but couldn't find such for the sg2002
<bjdooks>
that sounds more like a binutils issue, not a gcc one
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<palmer>
wigyori: ya, and you're probably missing something like "xtheadvector1p0" in the "-march" string. I think Charlie's latest patches should work, but if you're using vendor trees then you'll probably have to make sure how it's enabling the extensions matches what the toolchain wants
<bjdooks>
looks like some issue with floating point i need to chase down
<jrtc27>
big endian, oh no
<geertu>
the only true endianness ;-)
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<wigyori>
palmer / bjdooks: a change to -march=rv64imafdcvxtheadcmo1p0_xtheadsync1p0, and an s/sync.i/th.sync.i/ s/icache.iall/th.icache.iall/ seems to have done the trick - thanks. Now it's the "unknown CSR `mhcr'", i'll try to find something similar for that
<palmer>
If you know the CSR number you can just use that instead of the name, that's what we usually do in Linux to avoid getting coupled to assembler versions