Altix: Initial ACPI support - ROM shadowing.

[linux-2.6-omap-h63xx.git] / arch / ia64 / sn / kernel / io_acpi_init.c

diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
index a9dc36901b19852b0b6212ea9efe66303a0a7fac..99d7f278612a7be48645168bddccbd759604937b 100644 (file)
--- a/arch/ia64/sn/kernel/io_acpi_init.c
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -169,6 +169,39 @@ sn_acpi_bus_fixup(struct pci_bus *bus)
        }
 }
 
+/*
+ * sn_acpi_slot_fixup - Perform any SN specific slot fixup.
+ *                     At present there does not appear to be
+ *                     any generic way to handle a ROM image
+ *                     that has been shadowed by the PROM, so
+ *                     we pass a pointer to it within the
+ *                     pcidev_info structure.
+ */
+
+void
+sn_acpi_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
+{
+       void __iomem *addr;
+       size_t size;
+
+       if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
+               /*
+                * A valid ROM image exists and has been shadowed by the
+                * PROM. Setup the pci_dev ROM resource to point to
+                * the shadowed copy.
+                */
+               size = dev->resource[PCI_ROM_RESOURCE].end -
+                               dev->resource[PCI_ROM_RESOURCE].start;
+               addr =
+                    ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
+                            size);
+               dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
+               dev->resource[PCI_ROM_RESOURCE].end =
+                                               (unsigned long) addr + size;
+               dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
+       }
+}
+
 static struct acpi_driver acpi_sn_hubdev_driver = {
        .name = "SGI HUBDEV Driver",
        .ids = "SGIHUB,SGITIO",