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-rw-r--r--arch/i386/pci/acpi.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/i386/pci/acpi.c b/arch/i386/pci/acpi.c
new file mode 100644
index 000000000000..2db65ec45dc3
--- /dev/null
+++ b/arch/i386/pci/acpi.c
@@ -0,0 +1,53 @@
1#include <linux/pci.h>
2#include <linux/acpi.h>
3#include <linux/init.h>
4#include <linux/irq.h>
5#include <asm/hw_irq.h>
6#include "pci.h"
7
8struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
9{
10 if (domain != 0) {
11 printk(KERN_WARNING "PCI: Multiple domains not supported\n");
12 return NULL;
13 }
14
15 return pcibios_scan_root(busnum);
16}
17
18extern int pci_routeirq;
19static int __init pci_acpi_init(void)
20{
21 struct pci_dev *dev = NULL;
22
23 if (pcibios_scanned)
24 return 0;
25
26 if (acpi_noirq)
27 return 0;
28
29 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
30 acpi_irq_penalty_init();
31 pcibios_scanned++;
32 pcibios_enable_irq = acpi_pci_irq_enable;
33
34 if (pci_routeirq) {
35 /*
36 * PCI IRQ routing is set up by pci_enable_device(), but we
37 * also do it here in case there are still broken drivers that
38 * don't use pci_enable_device().
39 */
40 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
41 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
42 acpi_pci_irq_enable(dev);
43 } else
44 printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\". If it helps, post a report\n");
45
46#ifdef CONFIG_X86_IO_APIC
47 if (acpi_ioapic)
48 print_IO_APIC();
49#endif
50
51 return 0;
52}
53subsys_initcall(pci_acpi_init);