def native_write_pci_reg(self,
bus,
device,
function,
offset,
value,
size=4,
domain=0):
device_name = "{domain:04x}:{bus:02x}:{device:02x}.{function}".format(
domain=domain, bus=bus, device=device, function=function)
device_path = "/sys/bus/pci/devices/{}/config".format(device_name)
if not os.path.exists(device_path):
if offset < 256:
from chipsec.helper.linux.legacy_pci import LEGACY_PCI
pci = LEGACY_PCI()
value = pci.write_pci_config(bus, device, function, offset,
value)
return False
try:
config = open(device_path, "wb")
except IOError as err:
raise OsHelperError("Unable to open {}".format(device_path),
err.errno)
config.seek(offset)
config.write(defines.pack1(value, size))
config.close()
def native_read_pci_reg(self,
bus,
device,
function,
offset,
size,
domain=0):
device_name = "{domain:04x}:{bus:02x}:{device:02x}.{function}".format(
domain=domain, bus=bus, device=device, function=function)
device_path = "/sys/bus/pci/devices/{}/config".format(device_name)
if not os.path.exists(device_path):
if offset < 256:
from chipsec.helper.linux.legacy_pci import LEGACY_PCI
pci = LEGACY_PCI()
value = pci.read_pci_config(bus, device, function, offset)
return value
else:
byte = b"\xff"
return defines.unpack1(byte * size, size)
try:
config = open(device_path, "rb")
except IOError as err:
raise OsHelperError("Unable to open {}".format(device_path),
err.errno)
config.seek(offset)
reg = config.read(size)
config.close()
reg = defines.unpack1(reg, size)
return reg