[U-Boot-Users] Command "dcache on" for MPC850 isn't valid
Hi All,
I got a problem recently and have to send this mail for resolution. The configuration I'm using:
CPU: MPC8xx U-boot: 1.1.4 Linux : 2.6.15 ELDK : 4.0
As everyone knew, uboot for MPC850 didn't turn on data cache, but 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?
Thanks, Gavin
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
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
In message 461D9765.7060502@alcatel-lucent.com you wrote:
Thanks for your quick response. But linux kernel need to turn on data cache at head_8xx.S::initial_mmu.
Yes. So what?
PLease don't top post / full quote. Read http://www.netmeister.org/news/learn2quote.html
Best regards,
Wolfgang Denk
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Wolfgang Denk