PCI/x86: early dump pci conf space v2

[linux-2.6] / arch / x86 / pci / early.c

diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c
index 8e2821e8dac5aa78c13e31f3eac26b6962fad737..858dbe3399f9f79d5b318bef2767ffcb37153960 100644 (file)
--- a/arch/x86/pci/early.c
+++ b/arch/x86/pci/early.c
@@ -64,3 +64,54 @@ int early_pci_allowed(void)
        return (pci_probe & (PCI_PROBE_CONF1|PCI_PROBE_NOEARLY)) ==
                        PCI_PROBE_CONF1;
 }
+
+void early_dump_pci_device(u8 bus, u8 slot, u8 func)
+{
+       int i;
+       int j;
+       u32 val;
+
+       printk("PCI: %02x:%02x:%02x", bus, slot, func);
+
+       for (i = 0; i < 256; i += 4) {
+               if (!(i & 0x0f))
+                       printk("\n%04x:",i);
+
+               val = read_pci_config(bus, slot, func, i);
+               for (j = 0; j < 4; j++) {
+                       printk(" %02x", val & 0xff);
+                       val >>= 8;
+               }
+       }
+       printk("\n");
+}
+
+void early_dump_pci_devices(void)
+{
+       unsigned bus, slot, func;
+
+       if (!early_pci_allowed())
+               return;
+
+       for (bus = 0; bus < 256; bus++) {
+               for (slot = 0; slot < 32; slot++) {
+                       for (func = 0; func < 8; func++) {
+                               u32 class;
+                               u8 type;
+                               class = read_pci_config(bus, slot, func,
+                                                       PCI_CLASS_REVISION);
+                               if (class == 0xffffffff)
+                                       break;
+
+                               early_dump_pci_device(bus, slot, func);
+
+                               /* No multi-function device? */
+                               type = read_pci_config_byte(bus, slot, func,
+                                                              PCI_HEADER_TYPE);
+                               if (!(type & 0x80))
+                                       break;
+                       }
+               }
+       }
+}
+