PCI: add struct pci_host_bridge_window with CPU/bus address offset

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Some PCI host bridges apply an address offset, so bus addresses on PCI are
different from CPU addresses.  This patch adds a way for architectures to
tell the PCI core about this offset.  For example:

    LIST_HEAD(resources);
    pci_add_resource_offset(&resources, host->io_space, host->io_offset);
    pci_add_resource_offset(&resources, host->mem_space, host->mem_offset);
    pci_scan_root_bus(parent, bus, ops, sysdata, &resources);

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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This commit is contained in:

Bjorn Helgaas 2012-02-23 20:19:00 -07:00

parent 5a21d70dbd

commit 0efd5aab41

3 changed files with 51 additions and 20 deletions

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30

drivers/pci/bus.c

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32

drivers/pci/probe.c

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9

include/linux/pci.h

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