The attached patches are for 2.5.18-ia64-020530.  They add support for
early printk on a UART, multiple PCI segments, PCI root bridge
translation offsets, and multiple HP ZX1 IOMMUs.

These have the same content as the ones I just posted for 2.4.18,
except that 2.5.18 has slightly older ACPI, has a different ZX1 "fake
device" strategy (doesn't use sysdata) and doesn't have a working ZX1
IOMMU yet.

The early printk diff includes a diff to hcdp_serial.c, which was not
in the 020530 patch.  If you have since pulled hcdp_serial.c into
2.5, that hunk will be useful, otherwise you can just ignore it.
(Without HCDP, you have to specify the UART address with
CONFIG_IA64_EARLY_PRINTK_UART_BASE.)

Tested on HP ZX1 and i2000.

10_early_printk.diff
    Early printk for MMIO UARTs.  UART address from HCDP or specified
    in config.

30_sci.diff
    Add acpi_irq_to_vector() to handle both legacy ISA and new GSI
    interrupt numbers.  Add support for SCI on GSI interrupt.

40_pcibios_segment.diff
    Add struct pci_controller for IA64 sysdata.  Stash the PCI segment
    there and add support in config accessors.

50_iosapic_segment.diff
    Add segment support for PCI interrupts.

60_pci_tra.diff
    Add support for PCI root bridges with non-zero translation
    offsets.

70_enable_device.diff
    Add a platform vector for pci_enable_device().  ZX1 needs this to
    associate a device with the correct IOMMU.
-- 
Bjorn Helgaas - bjorn_helgaas at hp.com
Linux Systems Operation R&D
Hewlett-Packard Company