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1 virtual function void display(string prefix = "");
2 virtual function string psdisplay(string prefix = "");
3 virtual function vmm_notify copy(vmm_notify to = null);
4 virtual function int configure(int notification_id = -1,
5 sync_e sync = ONE_SHOT);
6 virtual function int is_configured(int notification_id);
7 virtual function bit is_on(int notification_id);
8 virtual task wait_for(int notification_id);
9 virtual task wait_for_off(int notification_id);
10 virtual function bit is_waited_for(int notification_id);
11 virtual function void terminated(int notification_id);
12 virtual function vmm_data status(int notification_id);
13 virtual function time timestamp(int notification_id);
14 virtual function void indicate(int notification_id,
15 vmm_data status = null);
16 virtual function void set_notification(int notification_id,
17 vmm_notification ntfy = null);
18 virtual function vmm_notification get_notification(int notification_id);
19 virtual function void reset(int notification_id = -1,
20 reset_e rst_typ = SOFT);
You could download file vmm_notify_methods.sv here
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1 `include "vmm.sv"
2
3 // Note : This is not exact representation of AHB data class
4 // All data class needs to extend from vmm_data
5 class ahb_data extends vmm_data;
6 vmm_log log;
7 // Declare all the fields
8 rand bit [31:0] addr;
9 rand bit [31:0] data [16];
10 rand bit [3:0] beats;
11
12 // Make sure all variables have init value
13 function new(vmm_log log);
14 int i;
15 super.new(log);
16 this.log = log;
17 this.addr = 0;
18 for (i = 0; i < 16; i ++) begin
19 this.data[1] = 0;
20 end
21 this.beats = 1;
22 endfunction
23
24 // Print message
25 function void display(string prefix = "");
26 if (is_valid()) begin
27 `vmm_debug(log,$psprintf("%s",psdisplay(prefix)));
28 end else begin
29 `vmm_error(log,$psprintf("%s",psdisplay(prefix)));
30 end
31 endfunction
32
33 // Return the string members and their values
34 virtual function string psdisplay(string prefix = "");
35 string msg;
36 int i;
37 msg = $psprintf(" %s\n", prefix);
38 msg = $psprintf("%s ADDRESS : 32'h%x\n",msg,addr);
39 msg = $psprintf("%s BEATS : %0d\n",msg,beats);
40
41 for (i = 0; i < beats; i++) begin
42 msg = $psprintf("%s DATA[%2d] : 32'h%x\n",msg,i,data[i]);
43 end
44 psdisplay = msg;
45 endfunction
46 endclass
47
48 // We need to add below line to construct vmm_channel for object ahb_data
49 `vmm_channel(ahb_data)
50
51 // This class generates transactions
52 // Don't worry about vmm_xactor, will will see them later
53 class source extends vmm_xactor;
54 vmm_log log;
55 ahb_data_channel fifo;
56 // Declare new notify event
57 // As int
58 int SOURCE_DONE;
59 // As event
60 typedef enum {SOURCE_START} notifications_e;
61
62
63 function new(vmm_log log,string name, ahb_data_channel fifo);
64 super.new(name, name);
65 this.log = log;
66 this.fifo = fifo;
67 // Configure SOURCE_DONE as ON_OFF type
68 this.SOURCE_DONE = this.notify.configure(-1,vmm_notify::ON_OFF);
69 this.notify.configure(SOURCE_START);
70 endfunction
71
72 virtual task main();
73 int i;
74 ahb_data mdata;
75 super.main();
76 #10 ;
77 // Generate 2 transactions
78 this.notify.indicate(SOURCE_START);
79 for (i = 0; i < 2; i++) begin
80 mdata = new (log);
81 fifo.sneak(mdata);
82 // Wait for object to be process before generating next object
83 mdata.notify.wait_for(vmm_data::ENDED);
84 $display("Time to generate next object");
85 end
86 // Done with generation, so indicate done
87 this.notify.indicate(SOURCE_DONE);
88 endtask
89
90 endclass
91
92 // This class sinks transactions
93 class sink extends vmm_xactor;
94 ahb_data_channel fifo;
95 vmm_log log;
96
97 function new(vmm_log log, string name, ahb_data_channel fifo);
98 super.new(name,name);
99 this.log = log;
100 this.fifo = fifo;
101 endfunction
102
103 virtual task main();
104 ahb_data d;
105 super.main();
106 while (1) begin
107 wait_if_stopped_or_empty(fifo);
108 fifo.get(d);
109 // Indicate we are processing the object
110 d.notify.indicate(vmm_data::STARTED);
111 #10 ;
112 // Indicate we done with processing the object
113 $display("Indicating done processing");
114 d.notify.indicate(vmm_data::ENDED);
115 end
116 endtask
117 endclass
118
119 program test();
120 vmm_log log = new("test","ahb_data");
121 ahb_data_channel fifo = new ("CHANNEL","FIFO");
122 source src = new(log,"SOURCE",fifo);
123 sink snk = new(log,"SINK",fifo);
124
125 initial begin
126 snk.start_xactor();
127 src.start_xactor();
128 // Wait for source to start
129 src.notify.wait_for(source::SOURCE_START);
130 $display("Came out of SOURCE START");
131 // Wait for source to end
132 src.notify.wait_for(src.SOURCE_DONE);
133 $display("Came out of SOURCE DONE");
134 #100 ;
135 end
136 endprogram
You could download file vmm_notify_ex.sv here
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