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| lkcl_ | daveshah: ah. i think i found the source of the problem - i haven't implemented the DEC and TB SPRS yet... :) | 22:11 |
| lkcl_ | these are counters and, whoops, litex memtest relies on them... | 22:11 |
| lkcl_ | wark-wark | 22:11 |
| daveshah | Huh, I'm surprised that litex is that sophisticated tbh | 22:12 |
| lkcl_ | ah - pythondata_cpu_microwatt. | 22:14 |
| lkcl_ | which... provides a replacement that *might* be being used, might not. hmmm | 22:15 |
| somlo | lkcl_, daveshah: nothing helpful to add, but curious: I assume DEC and TB SPRS are cpu instructions, and the surprise is that whatever C code in the litex bios is compiled by gcc ends up actually using those instructions' opcodes? | 22:53 |
| sorear | SPR= special purpose register, DEC=decrementer (timer interrupt) | 22:55 |
| somlo | oh | 22:55 |
| somlo | litex has its own timer IP core and it does use an IRQ line. No idea re. SPR :) | 22:58 |
| somlo | and a lot of the generic code in the litex bios uses that timer to implement delay loops of various sorts | 23:01 |
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