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-rw-r--r--src/soc/amd/common/block/iommu/iommu.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/soc/amd/common/block/iommu/iommu.c b/src/soc/amd/common/block/iommu/iommu.c
index 52861f2af7..ad1d774baf 100644
--- a/src/soc/amd/common/block/iommu/iommu.c
+++ b/src/soc/amd/common/block/iommu/iommu.c
@@ -4,6 +4,9 @@
#include <device/pci.h>
#include <lib.h>
+#define IOMMU_CAP_BASE_LO 0x44
+#define IOMMU_CAP_BASE_HI 0x48
+
static void iommu_read_resources(struct device *dev)
{
struct resource *res;
@@ -12,7 +15,7 @@ static void iommu_read_resources(struct device *dev)
pci_dev_read_resources(dev);
/* IOMMU MMIO registers */
- res = new_resource(dev, 0x44);
+ res = new_resource(dev, IOMMU_CAP_BASE_LO);
res->size = 512 * KiB;
res->align = log2(res->size);
res->gran = log2(res->size);