1 files changed, 130 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 0245c989d30a..c61e9324f770 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -691,3 +691,133 @@ void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
         res->end = (region->end + offset) & mask;
 }
 EXPORT_SYMBOL(pcibios_bus_to_resource);
+
+/* Fixup a bus resource into a linux resource */
+static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
+{
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+        resource_size_t offset = 0, mask = (resource_size_t)-1;
+
+        if (res->flags & IORESOURCE_IO) {
+                offset = (unsigned long)hose->io_base_virt - _IO_BASE;
+                mask = 0xffffffffu;
+        } else if (res->flags & IORESOURCE_MEM)
+                offset = hose->pci_mem_offset;
+
+        res->start = (res->start + offset) & mask;
+        res->end = (res->end + offset) & mask;
+
+        pr_debug("PCI:%s            %016llx-%016llx\n",
+                 pci_name(dev),
+                 (unsigned long long)res->start,
+                 (unsigned long long)res->end);
+}
+
+
+/* This header fixup will do the resource fixup for all devices as they are
+ * probed, but not for bridge ranges
+ */
+static void __devinit pcibios_fixup_resources(struct pci_dev *dev)
+{
+        struct pci_controller *hose = pci_bus_to_host(dev->bus);
+        int i;
+
+        if (!hose) {
+                printk(KERN_ERR "No host bridge for PCI dev %s !\n",
+                       pci_name(dev));
+                return;
+        }
+        for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+                struct resource *res = dev->resource + i;
+                if (!res->flags)
+                        continue;
+                if (res->end == 0xffffffff) {
+                        pr_debug("PCI:%s Resource %d %016llx-%016llx [%x] is unassigned\n",
+                                 pci_name(dev), i,
+                                 (unsigned long long)res->start,
+                                 (unsigned long long)res->end,
+                                 (unsigned int)res->flags);
+                        res->end -= res->start;
+                        res->start = 0;
+                        res->flags |= IORESOURCE_UNSET;
+                        continue;
+                }
+
+                pr_debug("PCI:%s Resource %d %016llx-%016llx [%x] fixup...\n",
+                         pci_name(dev), i,
+                         (unsigned long long)res->start,\
+                         (unsigned long long)res->end,
+                         (unsigned int)res->flags);
+
+                fixup_resource(res, dev);
+        }
+
+        /* Call machine specific resource fixup */
+        if (ppc_md.pcibios_fixup_resources)
+                ppc_md.pcibios_fixup_resources(dev);
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources);
+
+static void __devinit __pcibios_fixup_bus(struct pci_bus *bus)
+{
+        struct pci_dev *dev = bus->self;
+
+        pr_debug("PCI: Fixup bus %d (%s)\n", bus->number, dev ? pci_name(dev) : "PHB");
+
+        /* Fixup PCI<->PCI bridges. Host bridges are handled separately, for
+         * now differently between 32 and 64 bits.
+         */
+        if (dev != NULL) {
+                struct resource *res;
+                int i;
+
+                for (i = 0; i < PCI_BUS_NUM_RESOURCES; ++i) {
+                        if ((res = bus->resource[i]) == NULL)
+                                continue;
+                        if (!res->flags || bus->self->transparent)
+                                continue;
+
+                        pr_debug("PCI:%s Bus rsrc %d %016llx-%016llx [%x] fixup...\n",
+                                 pci_name(dev), i,
+                                 (unsigned long long)res->start,\
+                                 (unsigned long long)res->end,
+                                 (unsigned int)res->flags);
+
+                        fixup_resource(res, dev);
+                }
+        }
+
+        /* Additional setup that is different between 32 and 64 bits for now */
+        pcibios_do_bus_setup(bus);
+
+        /* Platform specific bus fixups */
+        if (ppc_md.pcibios_fixup_bus)
+                ppc_md.pcibios_fixup_bus(bus);
+
+        /* Read default IRQs and fixup if necessary */
+        list_for_each_entry(dev, &bus->devices, bus_list) {
+                pci_read_irq_line(dev);
+                if (ppc_md.pci_irq_fixup)
+                        ppc_md.pci_irq_fixup(dev);
+        }
+}
+
+void __devinit pcibios_fixup_bus(struct pci_bus *bus)
+{
+        /* When called from the generic PCI probe, read PCI<->PCI bridge
+         * bases before proceeding
+         */
+        if (bus->self != NULL)
+                pci_read_bridge_bases(bus);
+        __pcibios_fixup_bus(bus);
+}
+EXPORT_SYMBOL(pcibios_fixup_bus);
+
+/* When building a bus from the OF tree rather than probing, we need a
+ * slightly different version of the fixup which doesn't read the
+ * bridge bases using config space accesses
+ */
+void __devinit pcibios_fixup_of_probed_bus(struct pci_bus *bus)
+{
+        __pcibios_fixup_bus(bus);
+}