From mboxrd@z Thu Jan  1 00:00:00 1970
From: syoder at austin.rr.com <syoder@austin.rr.com>
Date: Fri, 25 Mar 2005 16:02:55 -0600
Subject: [U-Boot-Users] U-boot + Linux + SMP question
Message-ID: <6c44b46c58b9.6c58b96c44b4@texas.rr.com>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

I have a high level question about how U-boot interacts with the Linux kernel on a PowerPC SMP system.
 
CPU 0 starts at the boot vector in U-boot, configures system, boots the Linux kernel.   In the kernel, CPU 0 takes action to start CPU 1 and waits for CPU 1 to start.
 
CPU 1 also starts execution at the boot vector.   Does CPU 1 take a different execution path through U-boot?   Does CPU 1 also decompress the kernel into SDRAM (over top of the one put there by CPU0)?
 
The CONFIG_SMP define in u-boot seems be isolated mostly to the asm-ppc/bitops.h header file.
 
Any pointers to where I could find info on this would be appreciated.
 
Thanks,
Stuart Yoder