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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_rxcbmgr.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 | #include "niu_mem.vrh" | |
37 | #include "niu_rx_descp.vrh" | |
38 | #include "niu_rxtoken.vrh" | |
39 | #include "niu_cbclass.vrh" | |
40 | ||
41 | ||
42 | ||
43 | // this class is to manage the callbacks to the memory based upon the | |
44 | // token content | |
45 | ||
46 | ||
47 | class CcbRxWriteMgr { | |
48 | ||
49 | integer max_cbs; | |
50 | integer max_goodcbs; | |
51 | integer max_dropcbs; | |
52 | integer startSemId; | |
53 | integer dropSemId; | |
54 | integer good_packetactive_cbs; | |
55 | integer drop_packetactive_cbs; | |
56 | integer GoodsemIdTab[]; | |
57 | integer DropsemIdTab[]; | |
58 | ||
59 | bit [63:0] address[]; | |
60 | ||
61 | task new( (integer i =0 )) { | |
62 | integer j; | |
63 | max_cbs = i; | |
64 | ||
65 | if(i!=0) { | |
66 | max_dropcbs = 2; // TMP? | |
67 | max_goodcbs = max_cbs - max_dropcbs; | |
68 | } else { | |
69 | max_dropcbs = 0; | |
70 | max_goodcbs = 0; | |
71 | } | |
72 | ||
73 | good_packetactive_cbs = 0; | |
74 | drop_packetactive_cbs = 0; | |
75 | for( j=0;j<max_cbs; j ++) { | |
76 | GoodsemIdTab[j] = 0; | |
77 | DropsemIdTab[j] = 0; | |
78 | } | |
79 | ||
80 | ||
81 | ||
82 | startSemId = alloc(SEMAPHORE,0,max_cbs,0); | |
83 | dropSemId = alloc(SEMAPHORE,0,1,0); | |
84 | ||
85 | } | |
86 | function integer isAvailable() ; | |
87 | function integer getgoodpktSemId( bit [63:0] a, ( integer MAX_TIMEOUT = 5000) ) ; | |
88 | task releaseSemId(integer semId); | |
89 | function integer getdroppktSemId(); | |
90 | ||
91 | } | |
92 | ||
93 | ||
94 | function integer CcbRxWriteMgr::isAvailable() { | |
95 | ||
96 | if( ( good_packetactive_cbs + drop_packetactive_cbs) == max_cbs) | |
97 | isAvailable = 0; | |
98 | else isAvailable = ( max_cbs - good_packetactive_cbs - drop_packetactive_cbs); | |
99 | ||
100 | printf(" CcbRxWriteMgr::isAvailable - %d \n",isAvailable); | |
101 | ||
102 | } | |
103 | function integer CcbRxWriteMgr::getdroppktSemId() { | |
104 | getdroppktSemId = dropSemId; | |
105 | } | |
106 | ||
107 | ||
108 | function integer CcbRxWriteMgr::getgoodpktSemId( bit [63:0] a, (integer MAX_TIMEOUT = 5000)) { | |
109 | ||
110 | integer i; | |
111 | integer id; | |
112 | integer done; | |
113 | i = 0; | |
114 | done = 0; | |
115 | id = 0; | |
116 | while( (i<max_cbs) & (done==0)) { | |
117 | printf(" in getgoodpktSemId i = %d , GoodsemIdTab - %d \n",i,GoodsemIdTab[i ]); | |
118 | if(GoodsemIdTab[i ] ==0) { // ie free | |
119 | getgoodpktSemId = startSemId + i; | |
120 | id = startSemId + i; | |
121 | good_packetactive_cbs++; | |
122 | GoodsemIdTab[i ] = 1; // Used | |
123 | done = 1; | |
124 | } | |
125 | i++; | |
126 | } | |
127 | ||
128 | // error | |
129 | if((i== max_cbs) & (done==0)) { | |
130 | printf(" No more SemIds available i= %d !! ERROR \n",i); | |
131 | getgoodpktSemId = -1; | |
132 | } else { | |
133 | address[id] = a; | |
134 | printf("CcbRxWriteMgr:: Allocated id - %d Address = %x \n",id,a); | |
135 | //timeout(SEMAPHORE,MAX_TIMEOUT,id); //temp | |
136 | } | |
137 | ||
138 | } | |
139 | ||
140 | task CcbRxWriteMgr::releaseSemId(integer semId){ | |
141 | ||
142 | integer i; | |
143 | i = semId - startSemId ; | |
144 | printf("CcbRxWriteMgr:: Releasing SemId - %d Address = %x \n",semId,address[semId]); | |
145 | GoodsemIdTab[i] = 0; | |
146 | good_packetactive_cbs--; | |
147 | ||
148 | } | |
149 |