x86, gart: add resume handling
If GART IOMMU is used on an AMD64 system, the northbridge registers
related to it should be restored during resume so that memory is not
corrupted. Make gart_resume() handle that as appropriate.
Ref. http://lkml.org/lkml/2008/5/25/96 and the following thread.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/gart.h b/include/asm-x86/gart.h
index c818b96..eeca2f5 100644
--- a/include/asm-x86/gart.h
+++ b/include/asm-x86/gart.h
@@ -14,6 +14,7 @@
extern void __init gart_parse_options(char *);
extern void early_gart_iommu_check(void);
extern void gart_iommu_hole_init(void);
+extern void set_up_gart_resume(u32, u32);
extern int fallback_aper_order;
extern int fallback_aper_force;
extern int gart_iommu_aperture;