i386: move pci

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 90 insertions, 0 deletions

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
new file mode 100644
index 000000000000..bc8a44bddaa7
--- /dev/null
+++ b/arch/x86/pci/acpi.c
@@ -0,0 +1,90 @@
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/numa.h>
+#include "pci.h"
+
+struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
+{
+        struct pci_bus *bus;
+        struct pci_sysdata *sd;
+        int pxm;
+
+        /* Allocate per-root-bus (not per bus) arch-specific data.
+         * TODO: leak; this memory is never freed.
+         * It's arguable whether it's worth the trouble to care.
+         */
+        sd = kzalloc(sizeof(*sd), GFP_KERNEL);
+        if (!sd) {
+                printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
+                return NULL;
+        }
+
+        if (domain != 0) {
+                printk(KERN_WARNING "PCI: Multiple domains not supported\n");
+                kfree(sd);
+                return NULL;
+        }
+
+        sd->node = -1;
+
+        pxm = acpi_get_pxm(device->handle);
+#ifdef CONFIG_ACPI_NUMA
+        if (pxm >= 0)
+                sd->node = pxm_to_node(pxm);
+#endif
+
+        bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
+        if (!bus)
+                kfree(sd);
+
+#ifdef CONFIG_ACPI_NUMA
+        if (bus != NULL) {
+                if (pxm >= 0) {
+                        printk("bus %d -> pxm %d -> node %d\n",
+                                busnum, pxm, sd->node);
+                }
+        }
+#endif
+        
+        return bus;
+}
+
+extern int pci_routeirq;
+static int __init pci_acpi_init(void)
+{
+        struct pci_dev *dev = NULL;
+
+        if (pcibios_scanned)
+                return 0;
+
+        if (acpi_noirq)
+                return 0;
+
+        printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
+        acpi_irq_penalty_init();
+        pcibios_scanned++;
+        pcibios_enable_irq = acpi_pci_irq_enable;
+        pcibios_disable_irq = acpi_pci_irq_disable;
+
+        if (pci_routeirq) {
+                /*
+                 * PCI IRQ routing is set up by pci_enable_device(), but we
+                 * also do it here in case there are still broken drivers that
+                 * don't use pci_enable_device().
+                 */
+                printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
+                for_each_pci_dev(dev)
+                        acpi_pci_irq_enable(dev);
+        } else
+                printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\".  If it helps, post a report\n");
+
+#ifdef CONFIG_X86_IO_APIC
+        if (acpi_ioapic)
+                print_IO_APIC();
+#endif
+
+        return 0;
+}
+subsys_initcall(pci_acpi_init);