[U-Boot-Users] Ocotea with 512 megs of ram - ping fails

[Howard, Marc]

Dale,

You've run into a problem where U-Boot maps the 2nd 256MB of physical
memory into the same logical space as the 1st 256MB. It's a one line/one
character typo that I've been meaning to post a patch for but I've been
tied up on other projects.  Here's the context diff:

--- ./board/amcc/ocotea/init.S	2005-12-19 18:14:46.000000000 -0800
+++ ../u-boot-git-ocotea-patch/board/amcc/ocotea/init.S	2005-12-22
13:38:38.000000000 -0800
@@ -92,5 +92,5 @@
     tlbentry( CFG_ISRAM_BASE + 0x1000, SZ_4K, 0x80001000, 0,
AC_R|AC_W|AC_X )
     tlbentry( CFG_SDRAM_BASE, SZ_256M, 0x00000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )
-    tlbentry( CFG_SDRAM_BASE+0x10000000, SZ_256M, 0x00000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )
+    tlbentry( CFG_SDRAM_BASE+0x10000000, SZ_256M, 0x10000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )
     tlbentry( CFG_PCI_BASE, SZ_256M, 0x00000000, 2, AC_R|AC_W|SA_G|SA_I
)
     tlbentry( CFG_PCI_MEMBASE, SZ_256M, 0x00000000, 3,
AC_R|AC_W|SA_G|SA_I )

This should fix your problem.

Marc

> -----Original Message-----
> From: u-boot-users-admin at lists.sourceforge.net 
> [mailto:u-boot-users-admin at lists.sourceforge.net] On Behalf 
> Of Dale Dunlea
> Sent: Tuesday, February 14, 2006 8:32 AM
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] Ocotea with 512 megs of ram - ping fails
> 
> Hi,
> 
> I have an Ocotea (AMCC 440GX) test board which I have been 
> using happily 
> with U-Boot 1.1.4. In it's original configuration, it uses a 
> single 256 
> meg dimm. This works fine and my kernel and initrd images are 
> downloaded 
> happily via tftp. I replaced this dimm with a 512 meg dimm 
> and now the 
> network interface is no longer functional. Has anyone else 
> seen this issue?
> 
> Regards,
> Dale
> 
> 
> 
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