litex/lib/sata/std.py

62 lines
1.1 KiB
Python

from migen.fhdl.std import *
from migen.genlib.record import *
from migen.flow.actor import *
primitives = {
"ALIGN" : 0x7B4A4ABC,
"CONT" : 0X9999AA7C,
"SYNC" : 0xB5B5957C,
"R_RDY" : 0x4A4A957C,
"R_OK" : 0x3535B57C,
"R_ERR" : 0x5656B57C,
"R_IP" : 0X5555B57C,
"X_RDY" : 0x5757B57C,
"CONT" : 0x9999AA7C,
"WTRM" : 0x5858B57C,
"SOF" : 0x3737B57C,
"EOF" : 0xD5D5B57C,
"HOLD" : 0xD5D5AA7C,
"HOLDA" : 0X9595AA7C
}
def is_primitive(dword):
for k, v in primitives.items():
if dword == v:
return True
return False
def decode_primitive(dword):
for k, v in primitives.items():
if dword == v:
return k
return ""
def ones(width):
return 2**width-1
def phy_layout(dw):
layout = [
("data", dw),
("charisk", dw//8),
]
return EndpointDescription(layout, packetized=False)
def link_layout(dw):
layout = [
("d", dw),
("error", 1)
]
return EndpointDescription(layout, packetized=True)
def transport_tx_layout(dw):
layout = [
("d", dw)
]
return EndpointDescription(layout, packetized=True)
def transport_rx_layout(dw):
layout = [
("d", dw)
]
return EndpointDescription(layout, packetized=True)