All
After digging around it would seem that U-boot is resetting after the first direct access to DDR memory. I placed a number of statements and installed a 'memory test' function.
I think the DDR init is failing due to the udelay(200) function early in the MPC8360E-MDS board files. The delay does not seem to be operational, so I 'think' the DDR gets enabled before the specked 200us delay that the MPC8360 manual requires.
Anyone have any ideas what might cause the udelay function to not 'delay' as advertised. <My core clock is setup at 533 Mhz, but 200us should be will within the non-overflow capability>.
-Russ -----Original Message----- From: Timur Tabi [mailto:timur@freescale.com] Sent: Monday, December 18, 2006 7:53 AM To: rmcguire@videopresence.com Cc: u-boot-users@lists.sourceforge.net Subject: Re: [U-Boot-Users] MPC8360E & Large DDR Capacities
Russell McGuire wrote:
Does anybody know if there are any issues with using DDR capacities above 256MB? I am attempting to use a 512MB DIMM at the moment, and am not sure
if
I am getting a SDRAM init issue that is causing U-boot to continuously reset,
It would be very helpful if you could narrow down the exact line of code that is causing the reset.