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PCI: skip ISA ioresource alignment on some systems

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Skip ISA ioresource alignment on some systems

To conserve limited PCI i/o resource on some IBM multi-node systems, the
BIOS allocates (via _CRS) and expects the kernel to use addresses in
ranges currently excluded by pcibios_align_resource() [i386/pci/i386.c].
This change allows the kernel to use the currently excluded address
ranges on the IBM x3800, x3850, and x3950.

Signed-off-by: Gary Hade <gary.hade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Gary Hade
2007-10-03 15:56:14 -07:00
committed by Greg Kroah-Hartman
parent 8fa5913d54
commit 036fff4cf7
4 changed files with 58 additions and 2 deletions
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arch/x86/pci/pci.h
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@@ -26,6 +26,7 @@
#define PCI_ASSIGN_ROMS 0x1000
#define PCI_BIOS_IRQ_SCAN 0x2000
#define PCI_ASSIGN_ALL_BUSSES 0x4000
#define PCI_CAN_SKIP_ISA_ALIGN 0x8000
extern unsigned int pci_probe;
extern unsigned long pirq_table_addr;