[coreboot] pci_read_config8 crash in mainboard.c

[ron minnich]

--- LinuxBIOSv2-asus_m2a-vm/src/mainboard/amd/dbm690t/mainboard.c
 (Revision 3967)
+++ LinuxBIOSv2-asus_m2a-vm/src/mainboard/amd/dbm690t/mainboard.c
 (Arbeitskopie)
@@ -89,6 +89,31 @@
       outb(byte, 0xC52);
 }

+/*
+ * This is a totally gross hack to be able to use pci_{read,write}_config*
+ * early during boot when the device tree is not yet set up completely.
+ */
+void devicetree_early_fixup(struct device *dev)
+{
+       struct bus *pbus = dev->bus;
+       while(pbus && pbus->dev && !ops_pci_bus(pbus)) {
+               if (pbus == pbus->dev->bus)
+                       break;
+               pbus = pbus->dev->bus;
+       }
+       if (ops_pci_bus(pbus)) {
+               printk_info("%s not needed\n", __func__);
+               return;
+       }
+       if (pbus && pbus->dev && pbus->dev->ops) {
+               printk_info("%s fixing up root bus pci ops\n", __func__);
+               pbus->dev->ops->ops_pci_bus = &pci_cf8_conf1;
+               return;
+       }
+       printk_info("%s failed\n", __func__);
+       return;
+}

There has to be a better way to do this than a per-mainboard fix.

ron