Make PCI Express host controllers functional, by: 1.  checking whether there's a link before initializing devices     on the bus. When there's no link any access onto the bus     will wedge the CPU. 2.  synthesizing the class & subclass so that the host controller     appears as a standard PCI bridge, rather than a PowerPC CPU.
Make PCI Express host controllers functional, by:
1.  checking whether there's a link before initializing devices
    on the bus. When there's no link any access onto the bus
    will wedge the CPU.
2.  synthesizing the class & subclass so that the host controller
    appears as a standard PCI bridge, rather than a PowerPC CPU.

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