408 lines
14 KiB
Python
408 lines
14 KiB
Python
"""
|
|
|
|
Copyright (c) 2020 Alex Forencich
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|
|
|
|
"""
|
|
|
|
import cocotb
|
|
from cocotb.triggers import RisingEdge, Event
|
|
from cocotb.log import SimLog
|
|
|
|
from collections import deque
|
|
|
|
from .constants import *
|
|
from .axil_channels import *
|
|
|
|
|
|
class AxiLiteMasterWrite(object):
|
|
def __init__(self, entity, name, clock, reset=None):
|
|
self.log = SimLog("cocotb.%s.%s" % (entity._name, name))
|
|
|
|
self.reset = reset
|
|
|
|
self.aw_channel = AxiLiteAWSource(entity, name, clock, reset)
|
|
self.w_channel = AxiLiteWSource(entity, name, clock, reset)
|
|
self.b_channel = AxiLiteBSink(entity, name, clock, reset)
|
|
|
|
self.active_tokens = set()
|
|
|
|
self.write_command_queue = deque()
|
|
self.write_command_sync = Event()
|
|
self.write_resp_queue = deque()
|
|
self.write_resp_sync = Event()
|
|
self.write_resp_set = set()
|
|
|
|
self.int_write_resp_command_queue = deque()
|
|
self.int_write_resp_command_sync = Event()
|
|
|
|
self.in_flight_operations = 0
|
|
|
|
self.width = len(self.w_channel.bus.wdata)
|
|
self.byte_size = 8
|
|
self.byte_width = self.width // self.byte_size
|
|
self.strb_mask = 2**self.byte_width-1
|
|
|
|
assert self.byte_width == len(self.w_channel.bus.wstrb)
|
|
assert self.byte_width * self.byte_size == self.width
|
|
|
|
cocotb.fork(self._process_write())
|
|
cocotb.fork(self._process_write_resp())
|
|
|
|
def init_write(self, address, data, prot=AxiProt.NONSECURE, token=None):
|
|
if token is not None:
|
|
if token in self.active_tokens:
|
|
raise Exception("Token is not unique")
|
|
self.active_tokens.add(token)
|
|
|
|
self.in_flight_operations += 1
|
|
|
|
self.write_command_queue.append((address, data, prot, token))
|
|
self.write_command_sync.set()
|
|
|
|
def idle(self):
|
|
return not self.in_flight_operations
|
|
|
|
async def wait(self):
|
|
while not self.idle():
|
|
self.write_resp_sync.clear()
|
|
await self.write_resp_sync.wait()
|
|
|
|
async def wait_for_token(self, token):
|
|
if token not in self.active_tokens:
|
|
return
|
|
while token not in self.write_resp_set:
|
|
self.write_resp_sync.clear()
|
|
await self.write_resp_sync.wait()
|
|
|
|
def write_resp_ready(self, token=None):
|
|
if token is not None:
|
|
return token in self.write_resp_set
|
|
return bool(self.write_resp_queue)
|
|
|
|
def get_write_resp(self, token=None):
|
|
if token is not None:
|
|
if token in self.write_resp_set:
|
|
for resp in self.write_resp_queue:
|
|
if resp[-1] == token:
|
|
self.write_resp_queue.remove(resp)
|
|
self.active_tokens.remove(resp[-1])
|
|
self.write_resp_set.remove(resp[-1])
|
|
return resp
|
|
return None
|
|
if self.write_resp_queue:
|
|
resp = self.write_resp_queue.popleft()
|
|
if resp[-1] is not None:
|
|
self.active_tokens.remove(resp[-1])
|
|
self.write_resp_set.remove(resp[-1])
|
|
return resp
|
|
return None
|
|
|
|
async def write(self, address, data, prot=AxiProt.NONSECURE):
|
|
token = object()
|
|
self.init_write(address, data, prot, token)
|
|
await self.wait_for_token(token)
|
|
return self.get_write_resp(token)[1:2]
|
|
|
|
async def _process_write(self):
|
|
while True:
|
|
if not self.write_command_queue:
|
|
self.write_command_sync.clear()
|
|
await self.write_command_sync.wait()
|
|
|
|
address, data, prot, token = self.write_command_queue.popleft()
|
|
|
|
word_addr = (address // self.byte_width) * self.byte_width
|
|
|
|
start_offset = address % self.byte_width
|
|
end_offset = ((address + len(data) - 1) % self.byte_width) + 1
|
|
|
|
strb_start = (self.strb_mask << start_offset) & self.strb_mask
|
|
strb_end = self.strb_mask >> (self.byte_width - end_offset)
|
|
|
|
cycles = (len(data) + (address % self.byte_width) + self.byte_width-1) // self.byte_width
|
|
|
|
self.int_write_resp_command_queue.append((address, len(data), cycles, prot, token))
|
|
self.int_write_resp_command_sync.set()
|
|
|
|
offset = 0
|
|
|
|
self.log.info(f"Write start addr: {address:#010x} prot: {prot} data: {' '.join((f'{c:02x}' for c in data))}")
|
|
|
|
for k in range(cycles):
|
|
start = 0
|
|
stop = self.byte_width
|
|
strb = self.strb_mask
|
|
|
|
if k == 0:
|
|
start = start_offset
|
|
strb &= strb_start
|
|
if k == cycles-1:
|
|
stop = end_offset
|
|
strb &= strb_end
|
|
|
|
val = 0
|
|
for j in range(start, stop):
|
|
val |= bytearray(data)[offset] << j*8
|
|
offset += 1
|
|
|
|
aw = self.aw_channel._transaction_obj()
|
|
aw.awaddr = word_addr + k*self.byte_width
|
|
aw.awprot = prot
|
|
|
|
w = self.w_channel._transaction_obj()
|
|
w.wdata = val
|
|
w.wstrb = strb
|
|
|
|
await self.aw_channel.drive(aw)
|
|
self.w_channel.send(w)
|
|
|
|
async def _process_write_resp(self):
|
|
while True:
|
|
if not self.int_write_resp_command_queue:
|
|
self.int_write_resp_command_sync.clear()
|
|
await self.int_write_resp_command_sync.wait()
|
|
|
|
addr, length, cycles, prot, token = self.int_write_resp_command_queue.popleft()
|
|
|
|
resp = AxiResp.OKAY
|
|
|
|
for k in range(cycles):
|
|
await self.b_channel.wait()
|
|
b = self.b_channel.recv()
|
|
|
|
cycle_resp = AxiResp(b.bresp)
|
|
|
|
if cycle_resp != AxiResp.OKAY:
|
|
resp = cycle_resp
|
|
|
|
self.log.info(f"Write complete addr: {addr:#010x} prot: {prot} resp: {resp!s} length: {length}")
|
|
|
|
self.write_resp_queue.append((addr, length, resp, token))
|
|
self.write_resp_sync.set()
|
|
if token is not None:
|
|
self.write_resp_set.add(token)
|
|
self.in_flight_operations -= 1
|
|
|
|
|
|
class AxiLiteMasterRead(object):
|
|
def __init__(self, entity, name, clock, reset=None):
|
|
self.log = SimLog("cocotb.%s.%s" % (entity._name, name))
|
|
|
|
self.reset = reset
|
|
|
|
self.ar_channel = AxiLiteARSource(entity, name, clock, reset)
|
|
self.r_channel = AxiLiteRSink(entity, name, clock, reset)
|
|
|
|
self.active_tokens = set()
|
|
|
|
self.read_command_queue = deque()
|
|
self.read_command_sync = Event()
|
|
self.read_data_queue = deque()
|
|
self.read_data_sync = Event()
|
|
self.read_data_set = set()
|
|
|
|
self.int_read_resp_command_queue = deque()
|
|
self.int_read_resp_command_sync = Event()
|
|
|
|
self.in_flight_operations = 0
|
|
|
|
self.width = len(self.r_channel.bus.rdata)
|
|
self.byte_size = 8
|
|
self.byte_width = self.width // self.byte_size
|
|
|
|
assert self.byte_width * self.byte_size == self.width
|
|
|
|
cocotb.fork(self._process_read())
|
|
cocotb.fork(self._process_read_resp())
|
|
|
|
def init_read(self, address, length, prot=AxiProt.NONSECURE, token=None):
|
|
if token is not None:
|
|
if token in self.active_tokens:
|
|
raise Exception("Token is not unique")
|
|
self.active_tokens.add(token)
|
|
|
|
self.in_flight_operations += 1
|
|
|
|
self.read_command_queue.append((address, length, prot, token))
|
|
self.read_command_sync.set()
|
|
|
|
def idle(self):
|
|
return not self.in_flight_operations
|
|
|
|
async def wait(self):
|
|
while not self.idle():
|
|
self.read_resp_sync.clear()
|
|
await self.read_resp_sync.wait()
|
|
|
|
async def wait_for_token(self, token):
|
|
if token not in self.active_tokens:
|
|
return
|
|
while token not in self.read_data_set:
|
|
self.read_data_sync.clear()
|
|
await self.read_data_sync.wait()
|
|
|
|
def read_data_ready(self, token=None):
|
|
if token is not None:
|
|
return token in self.read_data_set
|
|
return bool(self.read_data_queue)
|
|
|
|
def get_read_data(self, token=None):
|
|
if token is not None:
|
|
if token in self.read_data_set:
|
|
for resp in self.read_data_queue:
|
|
if resp[-1] == token:
|
|
self.read_data_queue.remove(resp)
|
|
self.active_tokens.remove(resp[-1])
|
|
self.read_data_set.remove(resp[-1])
|
|
return resp
|
|
return None
|
|
if self.read_data_queue:
|
|
resp = self.read_data_queue.popleft()
|
|
if resp[-1] is not None:
|
|
self.active_tokens.remove(resp[-1])
|
|
self.read_data_set.remove(resp[-1])
|
|
return resp
|
|
return None
|
|
|
|
async def read(self, address, length, prot=AxiProt.NONSECURE):
|
|
token = object()
|
|
self.init_read(address, length, prot, token)
|
|
await self.wait_for_token(token)
|
|
return self.get_read_data(token)[1:2]
|
|
|
|
async def _process_read(self):
|
|
while True:
|
|
if not self.read_command_queue:
|
|
self.read_command_sync.clear()
|
|
await self.read_command_sync.wait()
|
|
|
|
address, length, prot, token = self.read_command_queue.popleft()
|
|
|
|
word_addr = (address // self.byte_width) * self.byte_width
|
|
|
|
cycles = (length + self.byte_width-1 + (address % self.byte_width)) // self.byte_width
|
|
|
|
self.int_read_resp_command_queue.append((address, length, cycles, prot, token))
|
|
self.int_read_resp_command_sync.set()
|
|
|
|
self.log.info(f"Read start addr: {address:#010x} prot: {prot} length: {length}")
|
|
|
|
for k in range(cycles):
|
|
ar = self.ar_channel._transaction_obj()
|
|
ar.araddr = word_addr + k*self.byte_width
|
|
ar.arprot = prot
|
|
|
|
await self.ar_channel.drive(ar)
|
|
|
|
async def _process_read_resp(self):
|
|
while True:
|
|
if not self.int_read_resp_command_queue:
|
|
self.int_read_resp_command_sync.clear()
|
|
await self.int_read_resp_command_sync.wait()
|
|
|
|
addr, length, cycles, prot, token = self.int_read_resp_command_queue.popleft()
|
|
|
|
word_addr = (addr // self.byte_width) * self.byte_width
|
|
|
|
start_offset = addr % self.byte_width
|
|
end_offset = ((addr + length - 1) % self.byte_width) + 1
|
|
|
|
data = bytearray()
|
|
|
|
resp = AxiResp.OKAY
|
|
|
|
for k in range(cycles):
|
|
await self.r_channel.wait()
|
|
r = self.r_channel.recv()
|
|
|
|
cycle_data = int(r.rdata)
|
|
cycle_resp = AxiResp(r.rresp)
|
|
|
|
if cycle_resp != AxiResp.OKAY:
|
|
resp = cycle_resp
|
|
|
|
start = 0
|
|
stop = self.byte_width
|
|
|
|
if k == 0:
|
|
start = start_offset
|
|
if k == cycles-1:
|
|
stop = end_offset
|
|
|
|
for j in range(start, stop):
|
|
data.extend(bytearray([(cycle_data >> j*8) & 0xff]))
|
|
|
|
self.log.info(f"Read complete addr: {addr:#010x} prot: {prot} resp: {resp!s} data: {' '.join((f'{c:02x}' for c in data))}")
|
|
|
|
self.read_data_queue.append((addr, data, resp, token))
|
|
self.read_data_sync.set()
|
|
if token is not None:
|
|
self.read_data_set.add(token)
|
|
self.in_flight_operations -= 1
|
|
|
|
|
|
class AxiLiteMaster(object):
|
|
def __init__(self, entity, name, clock, reset=None):
|
|
self.write_if = None
|
|
self.read_if = None
|
|
|
|
self.write_if = AxiLiteMasterWrite(entity, name, clock, reset)
|
|
self.read_if = AxiLiteMasterRead(entity, name, clock, reset)
|
|
|
|
def init_read(self, address, length, prot=AxiProt.NONSECURE, token=None):
|
|
self.read_if.init_read(address, length, prot, token)
|
|
|
|
def init_write(self, address, data, prot=AxiProt.NONSECURE, token=None):
|
|
self.write_if.init_write(address, data, prot, token)
|
|
|
|
def idle(self):
|
|
return (not self.read_if or self.read_if.idle()) and (not self.write_if or self.write_if.idle())
|
|
|
|
async def wait(self):
|
|
while not self.idle():
|
|
await self.write_if.wait()
|
|
await self.read_if.wait()
|
|
|
|
async def wait_read(self):
|
|
await self.read_if.wait()
|
|
|
|
async def wait_write(self):
|
|
await self.write_if.wait()
|
|
|
|
def read_data_ready(self, token=None):
|
|
return self.read_if.read_data_ready(token)
|
|
|
|
def get_read_data(self, token=None):
|
|
return self.read_if.get_read_data(token)
|
|
|
|
def write_resp_ready(self, token=None):
|
|
return self.write_if.write_resp_ready(token)
|
|
|
|
def get_write_resp(self, token=None):
|
|
return self.write_if.get_write_resp(token)
|
|
|
|
async def read(self, address, length, prot=AxiProt.NONSECURE):
|
|
return await self.read_if.read(address, length, prot)
|
|
|
|
async def write(self, address, data, prot=AxiProt.NONSECURE):
|
|
return await self.write_if.write(address, data, prot)
|
|
|