diff options
Diffstat (limited to 'src/device/pci_early.c')
| -rw-r--r-- | src/device/pci_early.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/device/pci_early.c b/src/device/pci_early.c index 9086e64b85..ea2ebd5033 100644 --- a/src/device/pci_early.c +++ b/src/device/pci_early.c @@ -165,3 +165,34 @@ void pci_early_bridge_init(void) pci_early_mmio_window(p2p_bridge, CONFIG_EARLY_PCI_MMIO_BASE, 0x4000); } + +/* FIXME: A lot of issues using the following, please avoid. + * Assumes 256 PCI busses, scans them all even when PCI bridges are still + * disabled. Probes all functions even if 0 is not present. + */ +pci_devfn_t pci_locate_device(unsigned int pci_id, pci_devfn_t dev) +{ + for (; dev <= PCI_DEV(255, 31, 7); dev += PCI_DEV(0, 0, 1)) { + unsigned int id; + id = pci_read_config32(dev, 0); + if (id == pci_id) + return dev; + } + return PCI_DEV_INVALID; +} + +pci_devfn_t pci_locate_device_on_bus(unsigned int pci_id, unsigned int bus) +{ + pci_devfn_t dev, last; + + dev = PCI_DEV(bus, 0, 0); + last = PCI_DEV(bus, 31, 7); + + for (; dev <= last; dev += PCI_DEV(0, 0, 1)) { + unsigned int id; + id = pci_read_config32(dev, 0); + if (id == pci_id) + return dev; + } + return PCI_DEV_INVALID; +} |