[LinuxBIOS] Interesting.

[Feng, Libo]

Hi, all,

But the function init_cpus is called before the three functions: w83627hf_enable_serial(SERIAL_DEV, TTYS0_BASE); uart_init(); console_init(); The trace is sent out from the init_cpus.


Best Regards

丰立波 Feng Libo @ AMD  Ext: 20906
Mobile Phone: 13683249071
Office Phone: 0086-010-62801406

-----Original Message-----
From: Marc Jones [mailto:marc.jones at amd.com] 
Sent: Friday, November 30, 2007 12:47 AM
To: Feng, Libo
Cc: linuxbios
Subject: Re: [LinuxBIOS] Interesting.



Feng, Libo wrote:
> 
> Hi, all,
> 
> In our board, we found the trace is sent out: "Issuing SOFT_RESET…" 
> from the function init_cpus in the file init_cpus.c. But when the 
> function runs, the serial port is still far to be initialized, how 
> dose the trace is sent out?
> 
> Best Regards
> 
> 丰立波 Feng Libo @ AMD  Ext: 20906
> Mobile Phone: 13683249071
> Office Phone: 0086-010-62801406
> 

Each mainboard usually has an early uart setup located in auto.c or cache_as_ram_auto.c.

For example the Serengeti-Cheetah has the following lines.

w83627hf_enable_serial(SERIAL_DEV, TTYS0_BASE); uart_init(); console_init();


Marc




--
Marc Jones
Senior Firmware Engineer
(970) 226-9684 Office
mailto:Marc.Jones at amd.com
http://www.amd.com/embeddedprocessors