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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: basePktClass.vr | |
4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
6 | // | |
7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
8 | // | |
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; version 2 of the License. | |
12 | // | |
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | // | |
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | // | |
22 | // For the avoidance of doubt, and except that if any non-GPL license | |
23 | // choice is available it will apply instead, Sun elects to use only | |
24 | // the General Public License version 2 (GPLv2) at this time for any | |
25 | // software where a choice of GPL license versions is made | |
26 | // available with the language indicating that GPLv2 or any later version | |
27 | // may be used, or where a choice of which version of the GPL is applied is | |
28 | // otherwise unspecified. | |
29 | // | |
30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
31 | // CA 95054 USA or visit www.sun.com if you need additional information or | |
32 | // have any questions. | |
33 | // | |
34 | // ========== Copyright Header End ============================================ | |
35 | #include <vera_defines.vrh> | |
36 | ||
37 | ||
38 | // Generic CCX Packet. Yes, there is no code in here. | |
39 | ||
40 | virtual class BasePkt { | |
41 | ||
42 | protected string name = "Name Me"; | |
43 | ||
44 | public reg [16:0] sendPorts=0; // pkt will be sent from this/these ports (start at) | |
45 | public reg [16:0] targetPorts=0; // pkt is going to these ports (end at) | |
46 | public integer arrivalPort=99; // this packet arrived at this port | |
47 | public integer arrivalTime=0; | |
48 | public reg pktArrived=0; // set by BFM when the anticipated pkt arrives. | |
49 | public integer senderPort; // initiating port for this arriving pkt | |
50 | public reg ccxSourced = 0; // req pkt came in from CCX, not backdoor initiated | |
51 | public reg ccxSourced2 = 0; // cas/swap req pkt came in from CCX, not backdoor initiated | |
52 | public integer decGntTarget; // serviceSends task uses this for multicast gnt tracking | |
53 | public reg [2:0] tid = 0; | |
54 | public reg [3:0] rtntyp = 4'b1111; | |
55 | public reg [4:0] rqtyp = 5'b11111; | |
56 | public integer rtntypU = 0; // identifies specific packet type using defines | |
57 | public integer rqtypU = 0; // identifies specific packet type using defines | |
58 | public reg [39:0] addr = 0; | |
59 | public reg CASstore = 0; // holds true when a CAS request stores to L2. (for ld st sync) | |
60 | public reg [2:0] atomic = 0; // 1 for CAS1, 2 for CAS2 or ifill response 1=1,2=2 | |
61 | public reg [8:0] atm_wire = 0; | |
62 | public reg [8:0] req_wire = 9'bxxxxxxxxx; | |
63 | public integer reqTime; | |
64 | public integer reqId; | |
65 | public reg [3:0] lineWay = 4'hf; | |
66 | public reg [28:0] tag = ~0; | |
67 | public reg [127:0] signature; | |
68 | ||
69 | virtual task print(integer atPort); | |
70 | virtual task loadPkt(reg [145:0] dataIn, integer atPort); | |
71 | virtual task send(integer fastResp=0); | |
72 | virtual task recv(); | |
73 | // virtual task cancelRecv(); | |
74 | virtual function reg [145:0] makeSignature(); | |
75 | virtual function reg [145:0] getVector(); | |
76 | ||
77 | ||
78 | ||
79 | // how many bits set? | |
80 | protected function integer manyHot(reg [63:0] vec) { | |
81 | manyHot = 0; | |
82 | while (vec) { | |
83 | manyHot += vec[0]; | |
84 | vec >>= 1; | |
85 | } | |
86 | } | |
87 | ||
88 | // which bit set? if return is 99, there was 0 or > 1 hot. | |
89 | // returns the lowest bit number set. | |
90 | protected function integer whichHot(reg [63:0] vec, reg check=1) { | |
91 | whichHot = 0; | |
92 | ||
93 | while(vec[whichHot] !== 1) whichHot++; | |
94 | ||
95 | // none hot | |
96 | if (check && vec == 0) whichHot=99; | |
97 | // >1 hot | |
98 | if (check && manyHot(vec) > 1) whichHot=99; | |
99 | ||
100 | } | |
101 | ||
102 | } |