From a6f669e183e1a5bac244118d9196d926c040c8db Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Fri, 23 Jan 2015 20:20:56 -0600 Subject: 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 Reviewed-on: http://review.coreboot.org/8261 Reviewed-by: Alexandru Gagniuc Tested-by: build bot (Jenkins) --- src/northbridge/amd/amdfam10/northbridge.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src') diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c index 51cfee7186..84f255378e 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 } -- cgit v1.2.3