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[PATCH] Insert GART region into resource map

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Patch inserts the GART region into the iomem resource map. The GART will then
be visible within /proc/iomem. It will also allow for other users
utilizing the GART to subreserve the region (agp or IOMMU).

Signed-off-by: Aaron Durbin <adurbin@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Aaron Durbin 2006-09-26 10:52:40 +02:00 • committed by Andi Kleen
commit 56dd669a13
1 changed files with 20 additions and 1 deletions
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21
arch/x86_64/kernel/aperture.c
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@ -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. */
@ -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);
}
@ -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);