1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
//
// Copyright 2019 Ettus Research, A National Instruments Company
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
// Module: PkgAxisCtrlBfm
//
// Description: Package for an AXIS-Ctrl bus functional model (BFM), which
// consists primarily of the AxisCtrlPacket and AxisCtrlBfm classes.
//
package PkgAxisCtrlBfm;
import PkgChdrUtils::*;
import PkgAxiStreamBfm::*;
export PkgAxiStreamBfm::*;
//---------------------------------------------------------------------------
// AXIS-Ctrl Packet Class
//---------------------------------------------------------------------------
class AxisCtrlPacket;
//------------
// Properties
//------------
axis_ctrl_header_t header;
chdr_timestamp_t timestamp;
ctrl_op_word_t op_word;
ctrl_word_t data[$];
//---------
// Methods
//---------
// Return a handle to a copy of this transaction
function AxisCtrlPacket copy();
AxisCtrlPacket temp;
temp = new();
temp.header = this.header;
temp.timestamp = this.timestamp;
temp.op_word = this.op_word;
temp.data = this.data;
return temp;
endfunction
// Return true if this packet equals that of the argument
function bit equal(AxisCtrlPacket packet);
if (header != packet.header) return 0;
if (op_word != packet.op_word) return 0;
if (data.size() != packet.data.size()) return 0;
if (header.has_time && timestamp != packet.timestamp) return 0;
foreach (data[i]) begin
if (data[i] != packet.data[i]) return 0;
end
return 1;
endfunction : equal
// Format the contents of the packet into a string
function string sprint();
string str;
str = {str, $sformatf("AxisCtrlPacket:\n")};
str = {str, $sformatf("- header: %p\n", header) };
if (header.has_time)
str = {str, $sformatf("- timestamp: %0d\n", timestamp) };
str = {str, $sformatf("- op_word: '{status:%s,op_code:%s,byte_enable:0b%4b,address:0x%05x}\n",
op_word.status.name, op_word.op_code.name, op_word.byte_enable, op_word.address)};
str = {str, $sformatf("- data:\n") };
foreach (data[i]) begin
str = {str, $sformatf("%5d> 0x%08x\n", i, data[i]) };
end
return str;
endfunction : sprint
// Print the contents of the packet
function void print();
$display(sprint());
endfunction : print
function void write_ctrl(
ref axis_ctrl_header_t header,
ref ctrl_op_word_t op_word,
ref ctrl_word_t data[$],
input chdr_timestamp_t timestamp = 0
);
this.header = header;
this.data = data;
this.timestamp = timestamp;
this.op_word = op_word;
endfunction : write_ctrl
endclass : AxisCtrlPacket;
//---------------------------------------------------------------------------
// AXIS-Ctrl Bus Functional Model Class
//---------------------------------------------------------------------------
class AxisCtrlBfm extends AxiStreamBfm #(32);
extern function new (
virtual AxiStreamIf #(32).master master,
virtual AxiStreamIf #(32).slave slave
);
extern task put_ctrl(AxisCtrlPacket ctrl_packet);
extern task try_put_ctrl(AxisCtrlPacket ctrl_packet);
extern task get_ctrl(output AxisCtrlPacket ctrl_packet);
extern function bit try_get_ctrl(output AxisCtrlPacket ctrl_packet);
extern function AxisPacket axis_ctrl_to_axis(AxisCtrlPacket ctrl_packet);
extern function AxisCtrlPacket axis_to_axis_ctrl(AxisPacket axis_packet);
endclass : AxisCtrlBfm
//---------------------------------------------------------------------------
// AXIS-Ctrl BFM Methods
//---------------------------------------------------------------------------
// Class constructor. This must be given an interface for the master
// connection and an interface for the slave connection.
function AxisCtrlBfm::new (
virtual AxiStreamIf #(32).master master,
virtual AxiStreamIf #(32).slave slave
);
super.new(master, slave);
endfunction : new
// Queue the provided packet for transmission
task AxisCtrlBfm::put_ctrl(AxisCtrlPacket ctrl_packet);
AxisPacket axis_packet;
axis_packet = axis_ctrl_to_axis(ctrl_packet);
super.put(axis_packet);
endtask : put_ctrl
// Attempt to queue the provided packet for transmission. Return 1 if
// successful, return 0 if the queue is full.
task AxisCtrlBfm::try_put_ctrl(AxisCtrlPacket ctrl_packet);
AxisPacket axis_packet;
axis_packet = axis_ctrl_to_axis(ctrl_packet);
super.put(axis_packet);
endtask : try_put_ctrl
// Get the next packet when it becomes available (waits if necessary)
task AxisCtrlBfm::get_ctrl(output AxisCtrlPacket ctrl_packet);
AxisPacket axis_packet;
super.get(axis_packet);
ctrl_packet = axis_to_axis_ctrl(axis_packet);
endtask : get_ctrl
// Get the next packet if there's one available and return 1. Return 0 if
// there's no packet available.
function bit AxisCtrlBfm::try_get_ctrl(output AxisCtrlPacket ctrl_packet);
AxisPacket axis_packet;
if(!super.try_get(axis_packet)) return 0;
ctrl_packet = axis_to_axis_ctrl(axis_packet);
return 1;
endfunction : try_get_ctrl
// Convert an AXIS-Ctrl packet data structure to an AXI-Stream packet data
// structure.
function AxisCtrlBfm::AxisPacket AxisCtrlBfm::axis_ctrl_to_axis(AxisCtrlPacket ctrl_packet);
AxisPacket axis_packet = new();
int index;
// Insert words 0 and 1 (header)
axis_packet.data.push_back(ctrl_packet.header[31: 0]);
axis_packet.data.push_back(ctrl_packet.header[63:32]);
// Insert timestamp if has_time is set (words 2 and 3)
if (ctrl_packet.header.has_time) begin
axis_packet.data.push_back(ctrl_packet.timestamp[31: 0]);
axis_packet.data.push_back(ctrl_packet.timestamp[63:32]);
end
// Insert word 4 (operation word)
axis_packet.data.push_back(ctrl_packet.op_word[31: 0]);
// Insert data
foreach (ctrl_packet.data[i]) begin
axis_packet.data.push_back(ctrl_packet.data[i]);
end
return axis_packet;
endfunction : axis_ctrl_to_axis
// Convert an AXI-Stream packet data structure to an AXIS-Ctrl packet data
// structure.
function AxisCtrlPacket AxisCtrlBfm::axis_to_axis_ctrl(AxisPacket axis_packet);
AxisCtrlPacket ctrl_packet = new();
int i; // Use an index instead of pop_front() to workaround a ModelSim bug
// Grab words 0 and 1 (header)
ctrl_packet.header[31: 0] = axis_packet.data[0];
ctrl_packet.header[63:32] = axis_packet.data[1];
// If has_time is set, grab timestamp (words 2 and 3)
i = 2;
if (ctrl_packet.header.has_time) begin
ctrl_packet.timestamp[31: 0] = axis_packet.data[2];
ctrl_packet.timestamp[63:32] = axis_packet.data[3];
i += 2;
end
// Grab word 4 (operation word)
ctrl_packet.op_word[31: 0] = axis_packet.data[i];
// Grab data
ctrl_packet.data = axis_packet.data[(i+1):$];
return ctrl_packet;
endfunction : axis_to_axis_ctrl
endpackage : PkgAxisCtrlBfm
|
