In pci_cfgregread() and pci_cfgregwrite(), multiplex the domain and
bus number into the bus argument. The bus number occupies the least significant 8 bits. The PCI domain occupies the most significant 24 bits. On the Altix 350, the PCI domain is a required parameter, but changing the prototype of the pci_cfgreg*() functions to include a separate domain argument has wide-spread consequences across the supported architectures. We'd be changing a known interface. Multiplexing is an acceptable kluge to give us what we need with manageable impact. Note that the PCI bus number fits in 8 bits, so the multiplexing of the domain is a backward compatible change.
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@ -70,7 +70,7 @@ pci_cfgregread(int bus, int slot, int func, int reg, int len)
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register_t is;
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u_long addr;
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addr = pci_sal_address(0, bus, slot, func, reg);
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addr = pci_sal_address(bus >> 8, bus & 0xff, slot, func, reg);
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if (addr == ~0ul)
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return (~0);
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@ -91,7 +91,7 @@ pci_cfgregwrite(int bus, int slot, int func, int reg, uint32_t data, int len)
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register_t is;
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u_long addr;
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addr = pci_sal_address(0, bus, slot, func, reg);
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addr = pci_sal_address(bus >> 8, bus & 0xff, slot, func, reg);
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if (addr == ~0ul)
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return;
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