Boot issue on qmtech wukong

[enjoy-digital]

Hi Sir:

when I use linux_2020_12_15.zip on qmtech wukong board, the Linux kernel will boot failed.
but using https://github.com/litex-hub/linux-on-litex-vexriscv/files/5281217/kc705_2020_09_25.zip, this version will boot successfully.

BR, Sanada

Originally posted by @SanadaShinken in #164 (comment)

[enjoy-digital]

Hi @SanadaShinken,

the prebuilt linux_2020_12_15 is only compatible with >= 2020_12_15 bitstreams. You will have to rebuild the bitstream for your board to use it.

[SanadaShinken]

Hi @SanadaShinken,

the prebuilt linux_2020_12_15 is only compatible with >= 2020_12_15 bitstreams. You will have to rebuild the bitstream for your board to use it.

Hi @enjoy-digital 👍

Yes, I did the update to 2020-1218 for all of the litex related project.
the file is the boot up message. the most interesting parts in the file is the following part.

wukong_boot_fail.txt
[ 0.000000] Failed to find INTC node [/cpus/cpu@0]
[ 0.000000] Failed to initialize '/cpus/cpu@0': -19
[ 0.000000] timer_probe: no matching timers found

---

wukong_boot_ok.txt is using kc705_2020_09_25.zip's Image and rootfs.cpio
wukong_boot_ok.txt

in the workable Image and rootfs.cpio, there are some messages about litex-spiflash show that the device did not work properly.

[ 4.595471] litex-spiflash f0005800.spiflash: unrecognized JEDEC id bytes: ff, ff, ff
[ 4.596087] litex-spiflash f0005800.spiflash: SPI_NOR_SCAN FAILED
[ 4.596929] litex-spiflash: probe of f0005800.spiflash failed with error -2

BTW, the DDR3 memory R/W speed is very slow with compare to using the same DDR3 chip, such as like atry-7. is there any idea about improve memory access speed?

BR, Sanada

[SanadaShinken]

Hi @enjoy-digital :

Many Thanks for Litex and @enjoy-digital !!! Greate Work!!

finally, Using liunx image which built @ 20201215 is booted!!

this issue could be closed.

BR, Sanada

[enjoy-digital]

Closing since resolved.