Source code for spinnman.model.chip_info
# Copyright (c) 2014 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import struct
from typing import Iterable, List, Optional
from spinnman.messages.spinnaker_boot import SystemVariableDefinition
[docs]
class ChipInfo(object):
"""
Represents the system variables for a chip, received from the chip SDRAM.
"""
__slots__ = [
"_ip_address",
"_led_flash_period_ms",
"_leds",
"_links_available",
"_offset",
"_physical_to_virtual_core_map",
"_status_map",
"_system_data",
"_virtual_core_ids",
"_virtual_to_physical_core_map"]
def __init__(self, system_data: bytes, offset: int):
"""
:param system_data:
A byte-string retrieved from SDRAM on the board
:param offset:
The offset into the byte-string where the actual data starts
:raise SpinnmanInvalidParameterException:
If the data doesn't contain valid system data information
"""
self._system_data = system_data
self._offset = offset
links_available = self._read_int("links_available")
self._links_available: List[int] = list()
for i in range(6):
if ((links_available >> i) & 0x1) != 0:
self._links_available.append(i)
self._led_flash_period_ms = self._read_int(
"led_half_period_10_ms") * 10
self._leds = [self._read_int("led_0"), self._read_int("led_1")]
self._status_map = self._read_bytes("status_map")
self._physical_to_virtual_core_map = self._read_bytes(
"physical_to_virtual_core_map")
self._virtual_to_physical_core_map = self._read_bytes(
"virtual_to_physical_core_map")
self._virtual_core_ids: List[int] = list()
for virtual_core_id in self._physical_to_virtual_core_map:
if virtual_core_id != 0xFF:
self._virtual_core_ids.append(virtual_core_id)
self._virtual_core_ids.sort()
ip = self._read_bytes("ethernet_ip_address")
self._ip_address: Optional[str] = f"{ip[0]}.{ip[1]}.{ip[2]}.{ip[3]}"
if self._ip_address == "0.0.0.0":
self._ip_address = None
def _read_int(self, item: str) -> int:
item_def = SystemVariableDefinition[item]
code = item_def.data_type.struct_code
assert item_def.array_size is None
value, = struct.unpack_from(
code, self._system_data, self._offset + item_def.offset)
return value
def _read_bytes(self, item: str) -> bytes:
item_def = SystemVariableDefinition[item]
assert item_def.array_size is not None
code = f"{item_def.array_size}{item_def.data_type.struct_code}"
value, = struct.unpack_from(
code, self._system_data, self._offset + item_def.offset)
return value
@property
def x(self) -> int:
"""
The X-coordinate of the chip.
"""
return self._read_int("x")
@property
def y(self) -> int:
"""
The Y-coordinate of the chip.
"""
return self._read_int("y")
@property
def x_size(self) -> int:
"""
The number of chips in the X-dimension.
"""
return self._read_int("x_size")
@property
def y_size(self) -> int:
"""
The number of chips in the Y-dimension.
"""
return self._read_int("y_size")
@property
def nearest_ethernet_x(self) -> int:
"""
The X-coordinate of the nearest chip with Ethernet.
"""
return self._read_int("nearest_ethernet_x")
@property
def nearest_ethernet_y(self) -> int:
"""
The Y-coordinate of the nearest chip with Ethernet.
"""
return self._read_int("nearest_ethernet_y")
@property
def is_ethernet_available(self) -> bool:
"""
Whether the Ethernet is running on this chip.
"""
return self._read_int("is_ethernet_available") == 1
@property
def links_available(self) -> Iterable[int]:
"""
The links that are available on the chip.
"""
return self._links_available
@property
def cpu_clock_mhz(self) -> int:
"""
The speed of the CPU clock in MHz.
"""
return self._read_int("cpu_clock_mhz")
@property
def physical_to_virtual_core_map(self) -> bytes:
"""
The physical core ID to virtual core ID map; entries with a value
of 0xFF are non-operational cores.
"""
return self._physical_to_virtual_core_map
@property
def virtual_to_physical_core_map(self) -> bytes:
"""
The virtual core ID to physical core ID map; entries with a value
of 0xFF are non-operational cores.
"""
return self._virtual_to_physical_core_map
@property
def virtual_core_ids(self) -> Iterable[int]:
"""
A list of available cores by virtual core ID (including the monitor).
"""
return self._virtual_core_ids
@property
def sdram_base_address(self) -> int:
"""
The base address of the user region of SDRAM on the chip.
"""
return self._read_int("sdram_base_address")
@property
def system_sdram_base_address(self) -> int:
"""
The base address of the System SDRAM region on the chip.
"""
return self._read_int("system_sdram_base_address")
@property
def cpu_information_base_address(self) -> int:
"""
The base address of the CPU information structure.
"""
return self._read_int("cpu_information_base_address")
@property
def first_free_router_entry(self) -> int:
"""
The ID of the first free routing entry on the chip.
"""
return self._read_int("first_free_router_entry")
@property
def ip_address(self) -> Optional[str]:
"""
The IP address of the chip, or `None` if no Ethernet.
"""
return self._ip_address
@property
def iobuf_size(self) -> int:
"""
The size of the IOBUF buffers in bytes.
"""
return self._read_int("iobuf_size")
[docs]
def router_table_copy_address(self) -> int:
"""
:returns: The address of the copy of the router table.
"""
return self._read_int("router_table_copy_address")
@property
def system_ram_heap_address(self) -> int:
"""
The address of the base of the heap in system RAM.
"""
return self._read_int("system_ram_heap_address")
@property
def sdram_heap_address(self) -> int:
"""
The address of the base of the heap in SDRAM.
"""
return self._read_int("sdram_heap_address")