please: linux-2.5-20 -rc2 16550 serial console problem
From: Suresh Chandra Mannava <hidden>
Date: 2007-01-21 16:50:52
Hi All, I am working on porting linux-2.6.20-rc2 (DENX) kernel to our board. It consists of powerpc MPC7410, IBM CPC700 system controller and couple of AMD 79C972 network chips. I am using gcc version 4.0.0 (DENX ELDK 4.0 4.0.0) cross compiler for this task. I followed IBM spruce which consists of CPC700. CPC700 serial port is 16550 compatible. I can see printk's on serial console till "Freeing unused kernel memory", this happens before starting of init. I enabled debug statements in 8250.c and found some messages "like serial8250_interrupt(3)...end" and kernel freezes ( I attached serial console messages). ttyS0 is using interrupt 3. I assume it is not a tool chain or ramdisk image problem because I ported linux-2.4 (DENX) with the same tool chain and ramdisk image. Serial console is working fine in linux-2.4. I request you to provide some pointers for the same. Thanks, Suresh _________________________________________________________________ Do women make better employees? Join the debate http://msnspecials.in/debate/topicdetails.aspx?TID=64