1. Wolfgang is correct -- you should fix the SDRAM.
2. Also, though: the ICCR and DCCR apply when the MMU is off. Memory parameters for when the MMU is enabled is done via the W/I/M/G bits in the TLB entries.
-----Original Message----- From: Wolfgang Denk [mailto:wd@denx.de] Sent: Saturday, June 14, 2003 6:46 AM To: Frank Smith Cc: u-boot-users@lists.sourceforge.net; linuxppc-embedded@lists.linuxppc.org Subject: Re: Virtex-II Pro and Instruction Prefetching
In message 03Jun14.092013adt.7305@dragon.appliedmicro.ns.ca you wrote:
I'm working on getting PPCBoot 2.0.0 and Linux running on a custom Virtex-II Pro development board.
May I ask why you use PPCBoot (a dead project) instead of the successor project U-Boot?
I'm currently encountering problems with my DDR SDRAM controller --
This is a very common problem. Seems 99% of all people who attempt to port U-Boot see this soner or later.
it can't seem to handle instruction prefetching yet. So to sidestep the issue for now, I want to configure the 405 so that instructions are not prefetched.
Don't. The problem will bit you later again. Solve problems as they appear.
Wolfgang Denk
-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de Violence in reality is quite different from theory. -- Spock, "The Cloud Minders", stardate 5818.4
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