From patchwork Fri Apr  1 19:37:42 2011
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Subject: rs780 4GB memory issues
Date: Fri, 01 Apr 2011 19:37:42 -0000
From: Marc Jones <marcj303@gmail.com>
X-Patchwork-Id: 2842
Message-Id: <AANLkTinr6BCeNySBSk2YcwNYp8xsF=nEkdZNUWPU6sU6@mail.gmail.com>
To: Coreboot <coreboot@coreboot.org>

On Fri, Apr 1, 2011 at 12:15 PM, Marc Jones <marcj303@gmail.com> wrote:
> Use TOM2 for highest sysmem setting for northbound memory routing
> (DMA). This fixes 4GB memory issues.
>
> Signed-off-by: Marc Jones <marcj303@gmail.com>
>

Fixed the whitespace I messed up.
Acked-by: Stefan Reinauer <stefan.reinauer@coreboot.org>


Use TOM2 for highest sysmem setting for northbound memory routing (DMA). This fixes 4GB memory issues.

Signed-off-by: Marc Jones <marcj303@gmail.com>


Index: coreboot/src/southbridge/amd/rs780/gfx.c
===================================================================
--- coreboot.orig/src/southbridge/amd/rs780/gfx.c	2011-04-01 11:45:45.894571001 -0600
+++ coreboot/src/southbridge/amd/rs780/gfx.c	2011-04-01 13:33:50.706571001 -0600
@@ -661,11 +661,13 @@

 	printk(BIOS_DEBUG, "rs780_internal_gfx_enable dev = 0x%p, nb_dev = 0x%p.\n", dev, nb_dev);

-	sysmem = rdmsr(0xc001001a);
-	printk(BIOS_DEBUG, "sysmem = %x_%x\n", sysmem.hi, sysmem.lo);
-
 	/* The system top memory in 780. */
+	sysmem = rdmsr(0xc001001a);
+	printk(BIOS_DEBUG, "Sysmem TOM = %x_%x\n", sysmem.hi, sysmem.lo);
 	pci_write_config32(nb_dev, 0x90, sysmem.lo);
+
+	sysmem = rdmsr(0xc001001D);
+	printk(BIOS_DEBUG, "Sysmem TOM2 = %x_%x\n", sysmem.hi, sysmem.lo);
 	htiu_write_index(nb_dev, 0x30, 0);
 	htiu_write_index(nb_dev, 0x31, 0);