-/* K8 systems have some devices (typically in the builtin northbridge)
- that are only accessible using type1
- Normally this can be expressed in the MCFG by not listing them
- and assigning suitable _SEGs, but this isn't implemented in some BIOS.
- Instead try to discover all devices on bus 0 that are unreachable using MM
- and fallback for them. */
-static void __init unreachable_devices(void)
-{
- int i, bus;
- /* Use the max bus number from ACPI here? */
- for (bus = 0; bus < PCI_MMCFG_MAX_CHECK_BUS; bus++) {
- for (i = 0; i < 32; i++) {
- unsigned int devfn = PCI_DEVFN(i, 0);
- u32 val1, val2;
-
- pci_conf1_read(0, bus, devfn, 0, 4, &val1);
- if (val1 == 0xffffffff)
- continue;
-
- if (pci_mmcfg_arch_reachable(0, bus, devfn)) {
- raw_pci_ops->read(0, bus, devfn, 0, 4, &val2);
- if (val1 == val2)
- continue;
- }
- set_bit(i + 32 * bus, pci_mmcfg_fallback_slots);
- printk(KERN_NOTICE "PCI: No mmconfig possible on device"
- " %02x:%02x\n", bus, i);
- }
- }
-}
-