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| tnt | gatecat: mmm ... there seem to be a lot of atomic ops before it even setups the kernel traps. | 14:42 |
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| gatecat | tnt: yeah, this was on top of antmicros heavily patched tree, I suspect those may have been patched out too | 14:56 |
| gatecat | tbh emulating them in M-mode is a better option, but I don't have a good reference for that | 14:56 |
| gatecat | someone else here might | 14:57 |
| tnt | So the kernel by default runs in S-mode ? | 14:58 |
| gatecat | yeah | 15:03 |
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| * david-sawatzke[m < https://libera.ems.host/_matrix/media/r0/download/libera.chat/2687542de86aa4ca25f924562bd3d5fe11f1d8f7/message.txt > | 15:32 | |
| david-sawatzke[m | It's probably something to do with https://github.com/enjoy-digital/litex/pull/965, but I'm not sure | 15:32 |
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| tnt | mmm ... does the kernel except to be able to do misaligned loads ? I get a "load address misaligned" exception. | 19:50 |
| gatecat | I think it expects those to be emulated in M-mode too | 19:51 |
| tnt | But how does linux-on-litex handles that ? | 19:51 |
| gatecat | it used to have its own emulator, now it uses opensbi by the looks of things | 19:52 |
| tnt | was that done in the bios ? | 19:53 |
| gatecat | no, it goes bios->opensbi (which remains resident in m-mode)->linux | 19:53 |
| gatecat | the emulator used to be in the place of opensbi | 19:54 |
| tnt | right, I mean before it used opensbi. | 19:54 |
| tnt | I'm trying to find related code in the litex git history | 19:56 |
| gatecat | https://github.com/litex-hub/linux-on-litex-vexriscv/commit/382fe2ac67b2bb2fbc738d32b2054f95f1422780 | 19:56 |
| gatecat | was the commit that removed it and switched to opensbi | 19:56 |
| tnt | Thanks | 19:59 |
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