diff --git a/arch/x86_64/kernel/aperture.c b/arch/x86_64/kernel/aperture.c
index a3d450d6c15b5219443efc735457a1c7f326ad1d..3b443c80d3b065b18009e5410afaefe62057596f 100644
--- a/arch/x86_64/kernel/aperture.c
+++ b/arch/x86_64/kernel/aperture.c
@@ -20,7 +20,7 @@
 #include <linux/ioport.h>
 #include <asm/e820.h>
 #include <asm/io.h>
-#include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/pci-direct.h>
 #include <asm/dma.h>
 #include <asm/k8.h>
diff --git a/arch/x86_64/kernel/early-quirks.c b/arch/x86_64/kernel/early-quirks.c
index 990d9c218a5dd10e056833b6c2fa81e61b90919e..13aa4fd728f3dc7543ad49a37f825852a9a8ef00 100644
--- a/arch/x86_64/kernel/early-quirks.c
+++ b/arch/x86_64/kernel/early-quirks.c
@@ -14,6 +14,7 @@
 #include <linux/pci_ids.h>
 #include <asm/pci-direct.h>
 #include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/dma.h>
 
 static void __init via_bugs(void)
diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index 86927d5b846383c6fdd4822ff3aa60c101945937..21ded20a3bf4d55e2f5bbefea635d06e877bcbba 100644
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -35,7 +35,7 @@
 #include <linux/pci_ids.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
-#include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/calgary.h>
 #include <asm/tce.h>
 #include <asm/pci-direct.h>
diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c
index be8dce40f651dc13f7004eba3eb520506cda4f32..05d745ede561320a6c50d0a47c5a3cbb26cdf1f1 100644
--- a/arch/x86_64/kernel/pci-dma.c
+++ b/arch/x86_64/kernel/pci-dma.c
@@ -8,7 +8,7 @@
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <asm/io.h>
-#include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/calgary.h>
 
 int iommu_merge __read_mostly = 0;
diff --git a/arch/x86_64/kernel/pci-gart.c b/arch/x86_64/kernel/pci-gart.c
index 12acafdca791defd26187d55757aba2d7eec460a..4918c575d582cfd901ca23f47e8327a16045998f 100644
--- a/arch/x86_64/kernel/pci-gart.c
+++ b/arch/x86_64/kernel/pci-gart.c
@@ -28,6 +28,7 @@
 #include <asm/mtrr.h>
 #include <asm/pgtable.h>
 #include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/cacheflush.h>
 #include <asm/swiotlb.h>
 #include <asm/dma.h>
diff --git a/arch/x86_64/kernel/pci-nommu.c b/arch/x86_64/kernel/pci-nommu.c
index fe4aa19aa849d8d445122a13cd46f3bcb3dc9fd2..2a34c6c025a920832455dc0c32c4978ee5881ee0 100644
--- a/arch/x86_64/kernel/pci-nommu.c
+++ b/arch/x86_64/kernel/pci-nommu.c
@@ -6,7 +6,7 @@
 #include <linux/string.h>
 #include <linux/dma-mapping.h>
 
-#include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/processor.h>
 #include <asm/dma.h>
 
diff --git a/arch/x86_64/kernel/pci-swiotlb.c b/arch/x86_64/kernel/pci-swiotlb.c
index 4b4569abc60c8d3f3b993d2f1e0f9ee320ea0d82..b2f405ea7c85002b779b3c928a26ce424c9a0a0e 100644
--- a/arch/x86_64/kernel/pci-swiotlb.c
+++ b/arch/x86_64/kernel/pci-swiotlb.c
@@ -5,7 +5,7 @@
 #include <linux/module.h>
 #include <linux/dma-mapping.h>
 
-#include <asm/proto.h>
+#include <asm/iommu.h>
 #include <asm/swiotlb.h>
 #include <asm/dma.h>
 
diff --git a/arch/x86_64/kernel/reboot.c b/arch/x86_64/kernel/reboot.c
index e6e65c2c63ef4984f59b80866e13d9ee7d9096fe..368db2b9c5ac3977b0ec32edabe2aec9359df6de 100644
--- a/arch/x86_64/kernel/reboot.c
+++ b/arch/x86_64/kernel/reboot.c
@@ -16,7 +16,7 @@
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>
 #include <asm/apic.h>
-#include <asm/proto.h>
+#include <asm/iommu.h>
 
 /*
  * Power off function, if any
diff --git a/include/asm-x86_64/iommu.h b/include/asm-x86_64/iommu.h
new file mode 100644
index 0000000000000000000000000000000000000000..5af471f228eeacad86659cbda4ce60c3fadf8054
--- /dev/null
+++ b/include/asm-x86_64/iommu.h
@@ -0,0 +1,29 @@
+#ifndef _ASM_X8664_IOMMU_H
+#define _ASM_X8664_IOMMU_H 1
+
+extern void pci_iommu_shutdown(void);
+extern void no_iommu_init(void);
+extern int force_iommu, no_iommu;
+extern int iommu_detected;
+#ifdef CONFIG_IOMMU
+extern void gart_iommu_init(void);
+extern void gart_iommu_shutdown(void);
+extern void __init gart_parse_options(char *);
+extern void iommu_hole_init(void);
+extern int fallback_aper_order;
+extern int fallback_aper_force;
+extern int iommu_aperture;
+extern int iommu_aperture_allowed;
+extern int iommu_aperture_disabled;
+extern int fix_aperture;
+#else
+#define iommu_aperture 0
+#define iommu_aperture_allowed 0
+
+static inline void gart_iommu_shutdown(void)
+{
+}
+
+#endif
+
+#endif
diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h
index b70aa0ccbe2d7675e411a048fc1be9c05475a811..d6e3225549c0a820bcefa529e4b39739644fbfb9 100644
--- a/include/asm-x86_64/proto.h
+++ b/include/asm-x86_64/proto.h
@@ -85,31 +85,6 @@ extern int exception_trace;
 extern unsigned cpu_khz;
 extern unsigned tsc_khz;
 
-extern void pci_iommu_shutdown(void);
-extern void no_iommu_init(void);
-extern int force_iommu, no_iommu;
-extern int iommu_detected;
-#ifdef CONFIG_IOMMU
-extern void gart_iommu_init(void);
-extern void gart_iommu_shutdown(void);
-extern void __init gart_parse_options(char *);
-extern void iommu_hole_init(void);
-extern int fallback_aper_order;
-extern int fallback_aper_force;
-extern int iommu_aperture;
-extern int iommu_aperture_allowed;
-extern int iommu_aperture_disabled;
-extern int fix_aperture;
-#else
-#define iommu_aperture 0
-#define iommu_aperture_allowed 0
-
-static inline void gart_iommu_shutdown(void)
-{
-}
-
-#endif
-
 extern int reboot_force;
 extern int notsc_setup(char *);