Re: K8 + 2.4.21 + SuSE 64-bit mode + Arima HDAMA + 49LF040 + MTD

[YhLu]

Eric,

I have some questions about the APIC.
How can I change the Second Opteron's  APIC_ID? DO I need to make the second
CPU run and its process access (APIC_DEFAULT_BASE+APIC_ID) and set (1<<24)
to it.

Then When should start the process in auto.c or hardwaremain.c (
startup_other_cpus function)?  I have tried to add one branch in auto.c and
seems the second cpu start only from crt0.base. and it try copy LinBIOS and
Jump

Regards

Yinghai Lu

-----邮件原件-----
发件人: ron minnich [mailto:[e-mail]] 
发送时间: 2003年6月25日 8:13
收件人: [e-mail]
主题: K8 + 2.4.21 + SuSE 64-bit mode + Arima HDAMA + 49LF040 + MTD

The above combination works pretty well until I try to program the part, 
at which point the kernel takes an oops and dies.

I'm wondering if anyone else has either:
- seen this work 
- seen this fail

thanks

ron

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K8 + 2.4.21 + SuSE 64-bit mode + Arima HDAMA + 49LF040 + MTD

YhLu  writes:
> Eric,
>
> I have some questions about the APIC.
> How can I change the Second Opteron's  APIC_ID? DO I need to make the second
> CPU run and its process access (APIC_DEFAULT_BASE+APIC_ID) and set (1<<24)
> to it.

You need to know the apic id before you can start code on the second
cpu.  I recall seeing how how this is set in the BIOS programmers guide.
Look under unit id.
> Then When should start the process in auto.c or hardwaremain.c (
> startup_other_cpus function)?  I have tried to add one branch in auto.c and
> seems the second cpu start only from crt0.base. and it try copy LinBIOS and
> Jump

You definitely want to use the code in startup_other_cpus.
There is no good reason to run to multiple cpus in auto.c

Eric