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@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net] On Behalf Of Dale Dunlea Sent: Tuesday, February 14, 2006 8:32 AM To: u-boot-users@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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