From: "rtpkg" <rtpkg@263.net>
To: linuxppc-embedded@lists.linuxppc.org
Subject: UPM works for 16MB PC SDRAM but fails for 32MB memory
Date: Fri, 29 Mar 2002 10:02:29 +0800 (CST) [thread overview]
Message-ID: <3CA3CB35.000002.20883@mta6> (raw)
I have bootrom code (ppcboot) for which I have UPM values with which I
can access the 16MB PC SDRAM okay but for 32MB memory
my bootrom fails to execute out of RAM.
software: Now I have modifyed the AMA and MAMR registers,but it still not work!
Hardware:
My board uses two HY57V281620A SDRAM chips and it's configuration is 4 Banks x 2M x 16bits, 12 rows and 9 column.
MPC SDRAM
=========
A29 A0
A28 A1
A27 A2
A26 A3
A25 A4
A24 A5
A23 A6
A22 A7
A21 A8
A20 A9
GPL_A0 A10
A18 A11
A7 BA0
A8 BA1
OE_GPL_A1 RAS
GPL_A2 CAS
GPL_A3 WE
What do I have to do get 32MB memory going?
Thanks!
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next reply other threads:[~2002-03-29 2:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-29 2:02 rtpkg [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-03-29 7:53 UPM works for 16MB PC SDRAM but fails for 32MB memory laurent.mohin
2002-03-29 1:38 weiwu
2002-03-27 9:37 weiwu
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