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PCI/x86: early dump pci conf space v2

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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>
This commit is contained in:
Yinghai Lu
2008-05-22 14:35:11 -07:00
committed by Jesse Barnes
parent e7891c733f
commit e3f2baebf4
4 changed files with 63 additions and 0 deletions
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51
arch/x86/pci/early.c
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@@ -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;
}
}
}
}