1 files changed, 22 insertions, 3 deletions

diff --git a/arch/x86_64/kernel/aperture.c b/arch/x86_64/kernel/aperture.c
index 58af8e73738b..b487396c4c5b 100644
--- a/arch/x86_64/kernel/aperture.c
+++ b/arch/x86_64/kernel/aperture.c
@@ -17,6 +17,7 @@
 #include <linux/pci_ids.h>
 #include <linux/pci.h>
 #include <linux/bitops.h>
+#include <linux/ioport.h>
 #include <asm/e820.h>
 #include <asm/io.h>
 #include <asm/proto.h>
@@ -33,6 +34,18 @@ int fallback_aper_force __initdata = 0;
 
 int fix_aperture __initdata = 1;
 
+static struct resource gart_resource = {
+        .name   = "GART",
+        .flags  = IORESOURCE_MEM,
+};
+
+static void __init insert_aperture_resource(u32 aper_base, u32 aper_size)
+{
+        gart_resource.start = aper_base;
+        gart_resource.end = aper_base + aper_size - 1;
+        insert_resource(&iomem_resource, &gart_resource);
+}
+
 /* This code runs before the PCI subsystem is initialized, so just
    access the northbridge directly. */
 
@@ -48,7 +61,7 @@ static u32 __init allocate_aperture(void)
 
         /* 
          * Aperture has to be naturally aligned. This means an 2GB aperture won't
-         * have much chances to find a place in the lower 4GB of memory.
+         * have much chance of finding a place in the lower 4GB of memory.
          * Unfortunately we cannot move it up because that would make the
          * IOMMU useless.
          */
@@ -62,6 +75,7 @@ static u32 __init allocate_aperture(void)
         }
         printk("Mapping aperture over %d KB of RAM @ %lx\n",
                aper_size >> 10, __pa(p)); 
+        insert_aperture_resource((u32)__pa(p), aper_size);
         return (u32)__pa(p); 
 }
 
@@ -198,7 +212,7 @@ void __init iommu_hole_init(void)
         u64 aper_base, last_aper_base = 0;
         int valid_agp = 0;
 
-        if (iommu_aperture_disabled || !fix_aperture)
+        if (iommu_aperture_disabled || !fix_aperture || !early_pci_allowed())
                 return;
 
         printk("Checking aperture...\n"); 
@@ -233,8 +247,13 @@ void __init iommu_hole_init(void)
                 last_aper_base = aper_base;
         } 
 
-        if (!fix && !fallback_aper_force) 
+        if (!fix && !fallback_aper_force) {
+                if (last_aper_base) {
+                        unsigned long n = (32 * 1024 * 1024) << last_aper_order;
+                        insert_aperture_resource((u32)last_aper_base, n);
+                }
                 return; 
+        }
 
         if (!fallback_aper_force)
                 aper_alloc = search_agp_bridge(&aper_order, &valid_agp);