/*
* Discover remaining PCI buses in case there are peer host bridges.
* We use the number of last PCI bus provided by the PCI BIOS.
*/
static void __devinit pcibios_fixup_peer_bridges(void)
{
int n, devfn;
long node;
if (pcibios_last_bus <= 0 || pcibios_last_bus >= 0xff)
return;
DBG("PCI: Peer bridge fixup\n");
for (n=0; n <= pcibios_last_bus; n++) {
u32 l;
if (pci_find_bus(0, n))
continue;
node = get_mp_bus_to_node(n);
for (devfn = 0; devfn < 256; devfn += 8) {
if (!raw_pci_read(0, n, devfn, PCI_VENDOR_ID, 2, &l) &&
l != 0x0000 && l != 0xffff) {
DBG("Found device at %02x:%02x [%04x]\n", n, devfn, l);
printk(KERN_INFO "PCI: Discovered peer bus %02x\n", n);
pci_scan_bus_on_node(n, &pci_root_ops, node);
break;
}
}
}
}
acpi_status
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
u64 *value, u32 width)
{
int result, size;
u32 value32;
if (!value)
return AE_BAD_PARAMETER;
switch (width) {
case 8:
size = 1;
break;
case 16:
size = 2;
break;
case 32:
size = 4;
break;
default:
return AE_ERROR;
}
result = raw_pci_read(pci_id->segment, pci_id->bus,
PCI_DEVFN(pci_id->device, pci_id->function),
reg, size, &value32);
*value = value32;
return (result ? AE_ERROR : AE_OK);
}
void pcibios_scan_specific_bus(int busn)
{
int devfn;
u32 l;
if (pci_find_bus(0, busn))
return;
for (devfn = 0; devfn < 256; devfn += 8) {
if (!raw_pci_read(0, busn, devfn, PCI_VENDOR_ID, 2, &l) &&
l != 0x0000 && l != 0xffff) {
DBG("Found device at %02x:%02x [%04x]\n", busn, devfn, l);
printk(KERN_INFO "PCI: Discovered peer bus %02x\n", busn);
pcibios_scan_root(busn);
return;
}
}
}
void __devinit pcibios_scan_specific_bus(int busn)
{
int devfn;
long node;
u32 l;
if (pci_find_bus(0, busn))
return;
node = get_mp_bus_to_node(busn);
for (devfn = 0; devfn < 256; devfn += 8) {
if (!raw_pci_read(0, busn, devfn, PCI_VENDOR_ID, 2, &l) &&
l != 0x0000 && l != 0xffff) {
DBG("Found device at %02x:%02x [%04x]\n", busn, devfn, l);
printk(KERN_INFO "PCI: Discovered peer bus %02x\n", busn);
pci_scan_bus_on_node(busn, &pci_root_ops, node);
return;
}
}
}
static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
{
return raw_pci_read(pci_domain_nr(bus), bus->number,
devfn, where, size, value);
}