from migen.fhdl.std import *
from migen.genlib.record import *
from migen.flow.actor import EndpointDescription

primitives = {
	"ALIGN"	:	0x7B4A4ABC,
	"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,
	"HOLD"	: 	0X9595AA7C
}

def ones(width):
	return 2**width-1

def phy_description(dw):
	parameters = {
		"packetized": False
	}
	layout = [
		("data", dw),
		("charisk", dw//8),
	]
	return EndpointDescription(layout, parameters)

def link_description(dw):
	parameters = {
		"packetized": True
	}
	layout = [
		("d", dw),
		("error", 1)
	]
	return EndpointDescription(layout, parameters)