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Date:	Fri, 4 Feb 2005 01:40:28 +0100
From:	Ralf Baechle <ralf@linux-mips.org>
To:	Rojhalat Ibrahim <ibrahim@schenk.isar.de>
Cc:	linux-mips@linux-mips.org
Subject: Re: More than 512MB of memory
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On Tue, Jan 18, 2005 at 03:44:51PM +0100, Rojhalat Ibrahim wrote:

> is there anything special I have to do
> when I want to use more than 512MB of memory?
> My Yosemite board works fine with 512MB
> but when I try 1GB it crashes in 32bit mode
> with highmem and also in 64bit mode.
> The boot monitor (PMON) maps the 1024MB
> to physical addresses 0x0000.0000 - 0x4000.0000.

Can you try below patch?

  Ralf

--- linux/arch/mips/mm/c-r4k.c	2004-12-07 02:30:50.000000000 +0000
+++ linux/arch/mips/mm/c-r4k.c	2005-02-04 00:31:34.623814760 +0000
@@ -566,7 +566,10 @@
 
 	if (!cpu_has_ic_fills_f_dc) {
 		unsigned long addr = (unsigned long) page_address(page);
-		r4k_blast_dcache_page(addr);
+		if (addr)
+			r4k_blast_dcache_page(addr);
+		else
+			r4k_blast_dcache();
 		if (!cpu_icache_snoops_remote_store)
 			r4k_blast_scache_page(addr);
 		ClearPageDcacheDirty(page);