def get_physical_memory(tree: FdtParser, config: Config) -> List[Region]:
''' returns a list of regions representing physical memory as used by the kernel '''
regions = get_memory_regions(tree)
reserved = parse_reserved_regions(tree.get_path('/reserved-memory'))
regions = reserve_regions(regions, reserved)
regions, extra_reserved, physBase = align_memory(regions, config)
return regions, reserved.union(extra_reserved), physBase
def get_elfloader_devices(tree: fdt.FdtParser, rules: rule.HardwareYaml):
devices = []
# serial device
chosen = tree.get_path('/chosen')
if not chosen.has_prop('stdout-path') or type(
chosen.get_prop('stdout-path')) != pyfdt.pyfdt.FdtPropertyStrings:
logging.info(
'DT has no stdout-path, elfloader may not produce output!')
else:
val = chosen.get_prop('stdout-path').strings[0]
if val[0] == '/':
path = val
else:
path = tree.lookup_alias(val)
devices.append(tree.get_path(path))
return devices
def get_cpus(tree: FdtParser) -> List[WrappedNode]:
' Return a list of all the CPUs described in this device tree. '
cpus_node = tree.get_path('/cpus')
found_cpus = []
for node in cpus_node:
if node.has_prop('device_type') and node.get_prop('device_type').strings[0] == 'cpu':
found_cpus.append(node)
return found_cpus