[PATCH] x86_64: Port over e820 gap detection from i386
Look for gaps in the e820 memory map to put PCI resources in.
This hopefully fixes problems with the PCI code assigning 32bit BARs MMIO
resources which are >32bit.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index b06221e..57f6190 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -76,9 +76,6 @@
int acpi_numa __initdata;
-/* For PCI or other memory-mapped resources */
-unsigned long pci_mem_start = 0x10000000;
-
/* Boot loader ID as an integer, for the benefit of proc_dointvec */
int bootloader_type;
@@ -495,7 +492,6 @@
void __init setup_arch(char **cmdline_p)
{
- unsigned long low_mem_size;
unsigned long kernel_end;
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
@@ -654,13 +650,7 @@
request_resource(&ioport_resource, &standard_io_resources[i]);
}
- /* Will likely break when you have unassigned resources with more
- than 4GB memory and bridges that don't support more than 4GB.
- Doing it properly would require to use pci_alloc_consistent
- in this case. */
- low_mem_size = ((end_pfn << PAGE_SHIFT) + 0xfffff) & ~0xfffff;
- if (low_mem_size > pci_mem_start)
- pci_mem_start = low_mem_size;
+ e820_setup_gap();
#ifdef CONFIG_GART_IOMMU
iommu_hole_init();