Patch set updated for coreboot: a24d397 amd/amdfam10: Allocate the lower DRAM region up to TOM

[Timothy Pearson]

Timothy Pearson ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8261

-gerrit

commit a24d397efcb3267d92b3250586bb3bbb63c8b800
Author: Timothy Pearson 
Date:   Fri Jan 23 20:20:56 2015 -0600

amd/amdfam10: Allocate the lower DRAM region up to TOM

This fixes the resource allocator locating the PCI register
    space below 0xe0000000 thereby causing corruption with more
    than ~3.5GB physical RAM on AMD Family 10h systems.

Change-Id: I66d1bfa1e977a6b492c1909079087a801c7e6a3a
    Signed-off-by: Timothy Pearson 
---
 src/northbridge/amd/amdfam10/northbridge.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c
index 51cfee7..84f2553 100644
--- a/src/northbridge/amd/amdfam10/northbridge.c
+++ b/src/northbridge/amd/amdfam10/northbridge.c
@@ -677,6 +677,9 @@ static void amdfam10_domain_read_resources(device_t dev)
    res->size = CONFIG_MMCONF_BUS_NUMBER * 4096*256;
    res->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
    	IORESOURCE_FIXED | IORESOURCE_STORED |  IORESOURCE_ASSIGNED;
+
+	/* Reserve lower DRAM region to force PCI MMIO region to correct location above 0xefffffff */
+	ram_resource(dev, 7, 0, rdmsr(TOP_MEM).lo >> 10);
 #endif
 }