Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / arch / x86 / kernel / aperture_64.c

diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 6fabd40..b3a16e8 100644 (file)
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -27,7 +27,7 @@
 #include <asm/gart.h>
 #include <asm/pci-direct.h>
 #include <asm/dma.h>
-#include <asm/k8.h>
+#include <asm/amd_nb.h>
 #include <asm/x86_init.h>
 
 int gart_iommu_aperture;
@@ -371,7 +371,7 @@ void __init early_gart_iommu_check(void)
 
 static int __initdata printed_gart_size_msg;
 
-void __init gart_iommu_hole_init(void)
+int __init gart_iommu_hole_init(void)
 {
        u32 agp_aper_base = 0, agp_aper_order = 0;
        u32 aper_size, aper_alloc = 0, aper_order = 0, last_aper_order = 0;
@@ -381,7 +381,7 @@ void __init gart_iommu_hole_init(void)
 
        if (gart_iommu_aperture_disabled || !fix_aperture ||
            !early_pci_allowed())
-               return;
+               return -ENODEV;
 
        printk(KERN_INFO  "Checking aperture...\n");
 
@@ -463,8 +463,9 @@ out:
                        unsigned long n = (32 * 1024 * 1024) << last_aper_order;
 
                        insert_aperture_resource((u32)last_aper_base, n);
+                       return 1;
                }
-               return;
+               return 0;
        }
 
        if (!fallback_aper_force) {
@@ -500,13 +501,18 @@ out:
                        panic("Not enough memory for aperture");
                }
        } else {
-               return;
+               return 0;
        }
 
        /* Fix up the north bridges */
        for (i = 0; i < ARRAY_SIZE(bus_dev_ranges); i++) {
-               int bus;
-               int dev_base, dev_limit;
+               int bus, dev_base, dev_limit;
+
+               /*
+                * Don't enable translation yet but enable GART IO and CPU
+                * accesses and set DISTLBWALKPRB since GART table memory is UC.
+                */
+               u32 ctl = DISTLBWALKPRB | aper_order << 1;
 
                bus = bus_dev_ranges[i].bus;
                dev_base = bus_dev_ranges[i].dev_base;
@@ -515,13 +521,12 @@ out:
                        if (!early_is_k8_nb(read_pci_config(bus, slot, 3, 0x00)))
                                continue;
 
-                       /* Don't enable translation yet. That is done later.
-                          Assume this BIOS didn't initialise the GART so
-                          just overwrite all previous bits */
-                       write_pci_config(bus, slot, 3, AMD64_GARTAPERTURECTL, aper_order << 1);
+                       write_pci_config(bus, slot, 3, AMD64_GARTAPERTURECTL, ctl);
                        write_pci_config(bus, slot, 3, AMD64_GARTAPERTUREBASE, aper_alloc >> 25);
                }
        }
 
        set_up_gart_resume(aper_order, aper_alloc);
+
+       return 1;
 }