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Diffstat (limited to 'src/northbridge/intel/gm45/iommu.c')
-rw-r--r--src/northbridge/intel/gm45/iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/northbridge/intel/gm45/iommu.c b/src/northbridge/intel/gm45/iommu.c
index 0108116666..f42456413b 100644
--- a/src/northbridge/intel/gm45/iommu.c
+++ b/src/northbridge/intel/gm45/iommu.c
@@ -46,7 +46,7 @@ void init_iommu()
MCHBAR32(0x20) = IOMMU_BASE4 | 1; /* all other DMA sources */
/* clear GTT */
- u32 gtt = pci_read_config16(PCI_DEV(0, 0, 0), 0x52);
+ u16 gtt = pci_read_config16(PCI_DEV(0, 0, 0), D0F0_GGC);
if (gtt & 0x400) { /* VT mode */
pci_devfn_t igd = PCI_DEV(0, 2, 0);