PCI: add a new function to map BAR offsets
Add a function to map a given resource number to a corresponding
register so drivers can get the offset and type of device specific BARs.
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 3c5203f..32e8d88 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -31,6 +31,7 @@
struct pci_bus_region region;
u32 new, check, mask;
int reg;
+ enum pci_bar_type type;
struct resource *res = dev->resource + resno;
/*
@@ -62,17 +63,13 @@
else
mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
- if (resno < 6) {
- reg = PCI_BASE_ADDRESS_0 + 4 * resno;
- } else if (resno == PCI_ROM_RESOURCE) {
+ reg = pci_resource_bar(dev, resno, &type);
+ if (!reg)
+ return;
+ if (type != pci_bar_unknown) {
if (!(res->flags & IORESOURCE_ROM_ENABLE))
return;
new |= PCI_ROM_ADDRESS_ENABLE;
- reg = dev->rom_base_reg;
- } else {
- /* Hmm, non-standard resource. */
-
- return; /* kill uninitialised var warning */
}
pci_write_config_dword(dev, reg, new);
