vendorcode/amd/agesa/f15tn: Fix GnbIommuScratch in AGESA compilation

Missing IOMMU support is missing from the libagesa Makefile, it also
lacks a header with type-signature and a few bad typecast issues.

Change-Id: I7f2ad2104de9baaa66dbb6ffeb0f2b4d35fa5c16
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Co-Author: Rudolf Marek <r.marek@assembler.cz>
Reviewed-on: http://review.coreboot.org/7642
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/vendorcode/amd/agesa/f15tn/Makefile.inc b/src/vendorcode/amd/agesa/f15tn/Makefile.inc
index 4b44cef..278cb8e 100644
--- a/src/vendorcode/amd/agesa/f15tn/Makefile.inc
+++ b/src/vendorcode/amd/agesa/f15tn/Makefile.inc
@@ -230,6 +230,7 @@
 libagesa-y += Proc/GNB/Modules/GnbInitTN/PciePostInitTN.c
 libagesa-y += Proc/GNB/Modules/GnbInitTN/PciePowerGateTN.c
 libagesa-y += Proc/GNB/Modules/GnbInitTN/PcieTablesTN.c
+libagesa-y += Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.c
 libagesa-y += Proc/GNB/Modules/GnbIommuIvrs/GnbIommuIvrs.c
 libagesa-y += Proc/GNB/Modules/GnbIvrsLib/GnbIvrsLib.c
 libagesa-y += Proc/GNB/Modules/GnbMSocketLib/GnbMSocketLib.c
diff --git a/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.c b/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.c
index 5ed82bc..6869ab9 100644
--- a/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.c
+++ b/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.c
@@ -36,6 +36,8 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "GnbIommuScratch.h"
+
 #include  "AGESA.h"
 #include  "Ids.h"
 #include  "S3SaveState.h"
@@ -83,8 +85,14 @@
     return AGESA_FATAL;
   }
 
-  AddressLow = (((UINT32) ((UINT64) AllocHeapParams.BufferPtr)) + 0x3F) & D0F0x98_x27_IOMMUUrAddr_31_6__MASK;
+/*Align the address to 64 bytes boundary */
+#ifdef __x86_64__
+  AddressLow  = (((UINT32) ((UINT64) AllocHeapParams.BufferPtr)) + 0x3F) & D0F0x98_x27_IOMMUUrAddr_31_6__MASK;
   AddressHigh = ((UINT32) (((UINT64) AllocHeapParams.BufferPtr) >> 32)) & D0F0x98_x26_IOMMUUrAddr_39_32__MASK;
+#else
+  AddressLow  = ((((UINT32) AllocHeapParams.BufferPtr)) + 0x3F) & D0F0x98_x27_IOMMUUrAddr_31_6__MASK;
+  AddressHigh = 0;
+#endif
 
   GnbHandle = GnbGetHandle (StdHeader);
   while (GnbHandle != NULL) {
diff --git a/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.h b/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.h
new file mode 100644
index 0000000..a01b167
--- /dev/null
+++ b/src/vendorcode/amd/agesa/f15tn/Proc/GNB/Modules/GnbIommuScratch/GnbIommuScratch.h
@@ -0,0 +1,11 @@
+#ifndef _GNBIOMMUSCRATCH_H_
+#define _GNBIOMMUSCRATCH_H_
+
+#include  "AGESA.h"
+
+AGESA_STATUS
+GnbIommuScratchMemoryRangeInterface (
+  IN       AMD_CONFIG_PARAMS        *StdHeader
+  );
+
+#endif /* _GNBIOMMUSCRATCH_H_ */