diff options
Diffstat (limited to 'src/device')
| -rw-r--r-- | src/device/device_util.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/device/device_util.c b/src/device/device_util.c index d2c99e1980..cad2a06b20 100644 --- a/src/device/device_util.c +++ b/src/device/device_util.c @@ -158,6 +158,61 @@ struct device *dev_find_class(unsigned int class, struct device *from) return from; } +/** + * Encode the device path into 3 bytes for logging to CMOS. + * + * @param dev The device path to encode. + * @return Device path encoded into lower 3 bytes of dword. + */ +u32 dev_path_encode(device_t dev) +{ + u32 ret; + + if (!dev) + return 0; + + /* Store the device type in 3rd byte. */ + ret = dev->path.type << 16; + + /* Encode the device specific path in the low word. */ + switch (dev->path.type) { + case DEVICE_PATH_ROOT: + break; + case DEVICE_PATH_PCI: + ret |= dev->bus->secondary << 8 | dev->path.pci.devfn; + break; + case DEVICE_PATH_PNP: + ret |= dev->path.pnp.port << 8 | dev->path.pnp.device; + break; + case DEVICE_PATH_I2C: + ret |= dev->bus->secondary << 8 | dev->path.pnp.device; + break; + case DEVICE_PATH_APIC: + ret |= dev->path.apic.apic_id; + break; + case DEVICE_PATH_DOMAIN: + ret |= dev->path.domain.domain; + break; + case DEVICE_PATH_CPU_CLUSTER: + ret |= dev->path.cpu_cluster.cluster; + break; + case DEVICE_PATH_CPU: + ret |= dev->path.cpu.id; + break; + case DEVICE_PATH_CPU_BUS: + ret |= dev->path.cpu_bus.id; + break; + case DEVICE_PATH_IOAPIC: + ret |= dev->path.ioapic.ioapic_id; + break; + case DEVICE_PATH_NONE: + default: + break; + } + + return ret; +} + /* * Warning: This function uses a static buffer. Don't call it more than once * from the same print statement! |