+static inline int mcfg_broken(void)
+{
+ struct acpi_mcfg_allocation *cfg = &pci_mmcfg_config[0];
+
+ /* Handle more broken MCFG tables on Asus etc.
+ They only contain a single entry for bus 0-0. Assume
+ this applies to all busses. */
+ if (pci_mmcfg_config_num == 1 &&
+ cfg->pci_segment_group_number == 0 &&
+ (cfg->start_bus_number | cfg->end_bus_number) == 0)
+ return 1;
+ return 0;
+}
+
+static void __iomem *mcfg_ioremap(struct acpi_mcfg_allocation *cfg)
+{
+ void __iomem *addr;
+ u32 size;
+
+ if (mcfg_broken())
+ size = 256 << 20;
+ else
+ size = (cfg->end_bus_number + 1) << 20;
+
+ addr = ioremap_nocache(cfg->base_address, size);
+ if (addr) {
+ printk(KERN_INFO "PCI: Using MMCONFIG at %x - %x\n",
+ cfg->base_address,
+ cfg->base_address + size - 1);
+ }
+ return addr;
+}
+