Re: [U-Boot-Users] Command "dcache on" for MPC850 isn't valid

Denk,

Thanks for your quick response. But linux kernel need to turn on data cache at head_8xx.S::initial_mmu.

Thanks, Gavin

Wolfgang Denk wrote:

In message 461C6D9A.7010001@alcatel-lucent.com you wrote:

...

As everyone knew, uboot for MPC850 didn't turn on data cache, but

Yes, and for a very good reason, which is explained in detail in the README.

...

instruction cache is on. In order to test data cache, I added CFG_CMD_CACHE for CONFIG_COMMANDS. However, the CPU is spinning once I issue command "dcache on".

Any ideas on this?

Read the README.

Best regards,

Wolfgang Denk