summaryrefslogtreecommitdiff
path: root/arch/x86/pci/early.c
diff options
context:
space:
mode:
authorYinghai Lu <yhlu.kernel@gmail.com>2008-05-22 14:35:11 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-06-10 10:59:52 -0700
commite3f2baebf4209b5927e23fa65d5977d31db936b3 (patch)
tree2f5b9850f13f0ce1cefcf1ba5144933f4bb93470 /arch/x86/pci/early.c
parente7891c733f9b26c851edde50cf886a30bd133dbd (diff)
PCI/x86: early dump pci conf space v2
Allows us to dump PCI space before any kernel changes have been made. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'arch/x86/pci/early.c')
-rw-r--r--arch/x86/pci/early.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c
index 8e2821e8dac5..858dbe3399f9 100644
--- 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;
+ }
+ }
+ }
+}
+