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| somlo | _florent_: I think the latest litedram commit (eaf0691) broke SDRAM initialization on my trellisboard | 02:11 |
|---|---|---|
| somlo | initializes and passes memtest OK all the way up to and including 12a017f | 02:11 |
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| scanakci | darren099: yes it does. | 04:36 |
| darren099 | Thanks. I was able to boot at 115200 but no luck at higher speeds | 04:36 |
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| _florent_ | somlo: thanks for the feedback, i'll continue looking at that today, that's probably related to the DQS preamble/postamble. | 05:27 |
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| scanakci | https://usercontent.irccloud-cdn.com/file/gakpI6Rt/FPGA_BP_LiteX | 22:54 |
| scanakci | somlo: I am getting closer. Your patches were extremely useful :) | 22:54 |
| scanakci | I am using UART_POLL than interrupt. I modified the dts accordingly by getting rid of interrupts. @somlo: Is there anything that comes to your mind that requires some changes in your patches? I am debugging the current problem using simulator now and hope to figure out the bug(s) soon. | 22:58 |
| somlo | scanakci: does BlackParrot have Supervisor and User mode support? | 23:47 |
| scanakci | yes | 23:48 |
| somlo | _florent_: litedram 48c2fc2 fixed the problem I had yesterday, we're back in business -- thanks! | 23:48 |
| somlo | scanakci: it'd be interesting if you could figure out what the trapping opcode is, and where... I remember seeing something like that when I tried booting linux on a rocket compiled without S, U, and a MMU | 23:49 |
| somlo | but that was long ago. How to fix it depends on what is breaking,and I can't tell off the top of my head from your screenshot | 23:50 |
| scanakci | true, I am collecting more debug info now. I should have a better idea in couple of hours. | 23:51 |
| scanakci | If I simulate the same bbl rather than pushing to the FPGA, it prints "[" (the first char of linux bootup) and hangs | 23:52 |
| scanakci | I hope fixing the issue when simulating will make it work on FPGA | 23:53 |
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