> Thanks, I'll take a look at this. Have you seen any pi4 h/w docs > or have you been working just from linux drivers?
no, i wish. only reading linux source and deciphering device tree mazes. :( > I've been stalled on getting ether4330 to initialise. Putting > some coherence() calls into emmc.c helped (I don't like > out-of-order cpus) but I keep getting spurious interrupt 1023 > followed by watchdog reboot. i dont know anything about the 4330. i think theres a bug with the dma code tho. you actually need to invalidate caches *AFTER* the hw completed because the core can speculatively prefetch memory and bring it into the cache before the hardware is done writing memory. iirc the code just cleans/invalidates BEFORE issuing the dma operation. > Do you have the sdcard working? According to a pi engineer, > the new emmc controller is sdhci compliant so it shouldn't > be hard. i have not tried sdcard yet. -- cinap
