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authorJohn Keller <jpk@sgi.com>2006-10-04 16:49:52 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-12-01 14:36:58 -0800
commita2302c68d923537436b1114aa207787c1a31bd50 (patch)
treebf0407f2176a32ec79d2b7ab82e1fc9e54308fd2 /arch/ia64/sn/kernel/io_acpi_init.c
parent9f581f162e2b304be25dee49bf3945d4ed65dfb6 (diff)
Altix: Initial ACPI support - ROM shadowing.
Support a shadowed ROM when running with an ACPI capable PROM. Define a new dev.resource flag IORESOURCE_ROM_BIOS_COPY to describe the case of a BIOS shadowed ROM, which can then be used to avoid pci_map_rom() making an unneeded call to pci_enable_rom(). Signed-off-by: John Keller <jpk@sgi.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/ia64/sn/kernel/io_acpi_init.c')
-rw-r--r--arch/ia64/sn/kernel/io_acpi_init.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
index a9dc36901b1..99d7f278612 100644
--- 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",