PCI/ACPI: Support I/O resources when parsing host bridge resources
On platforms with memory-mapped I/O ports, such as ia64 and ARM64, we have to map the memory region and coordinate it with the arch's I/O port accessors. For ia64, we do this in arch code because it supports both dense (1 byte per I/O port) and sparse (1024 bytes per I/O port) memory mapping. For arm64, we only support dense mappings, which we can do in the generic code with pci_register_io_range() and pci_remap_iospace(). Add acpi_pci_root_remap_iospace() to remap dense memory-mapped I/O port space when adding a bridge, and call pci_unmap_iospace() to release the space when removing the bridge. [bhelgaas: changelog, move #ifdef inside acpi_pci_root_remap_iospace()] Signed-off-by: Jayachandran C <jchandra@broadcom.com> Signed-off-by: Sinan Kaya <okaya@codeaurora.org> [Tomasz: merged in Sinan's patch to unmap IO resources properly, updated changelog] Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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