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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281 | ###############################################################################
# Copyright (c) 2022-2024 by Altair Engineering, Inc.
# All rights reserved.
#
# Altair Engineering, Inc. makes this software available as part of the Vision
# tool platform. As long as you are a licensee of the Vision tool platform
# you may make copies of the software and modify it to be used within the
# Vision tool platform, but you must include all of this notice on any copy.
# Redistribution without written permission to any third party, with or
# without modification, is not permitted.
# Altair Engineering, Inc. does not warrant that this software is error free
# or fit for any purpose. Altair Engineering, Inc. disclaims any liability for
# all claims, expenses, losses, damages and costs any user may incur as a
# result of using, copying or modifying the software.
# =============================================================================
# @plugin
# Find Clocked Cells Without Reset
# @namespace
# ClockedWithoutReset
# @section
# Analyze the Loaded Database
# @description
# Find all instances of clocked cells and check the nets connected
# to the clock and reset pins.
# @configuration
# @files
# cust24/clockedWithoutReset.tcl
# @tag
# gui zdb
###############################################################################
# =============================================================================
# Init - Initialize the plugin.
# =============================================================================
#
proc ClockedWithoutReset:Init {} {
##
# Add a menu entry.
#
gui menu command {"Userware" "Find Clocked Cells without Reset"} \
[list ClockedWithoutReset:Start]
gui plugin addConfig \
ClockedWithoutReset \
1clkNames \
"CLK" \
text \
"Names of clock nets."
gui plugin addConfig \
ClockedWithoutReset \
2rstNames \
"RST" \
text \
"Names of reset nets."
gui plugin addConfig \
ClockedWithoutReset \
3ignFuncs \
"RAM CLOCKED_WRITE_PORT" \
text \
"Functions to ignore."
}
# =============================================================================
# Finit - Finalize the plugin.
# =============================================================================
#
proc ClockedWithoutReset:Finit {} {
##
# Undo modifications of the GUI.
#
gui menu removeEntry {"Userware" "Find Clocked Cells without Reset"}
}
# =============================================================================
# Start - Start the plugin.
# =============================================================================
#
proc ClockedWithoutReset:Start {} {
global ClockedWithoutReset
##
# get database.
#
set db [gui database get]
if {$db == {}} {
return
}
##
# get config.
#
ClockedWithoutReset:_initConfig
##
# clear result window.
#
gui window show Mem
gui mem clear
##
# process all clocked instances
#
set top [$db get_top_design]
$db flat foreach instOfCell clock $top inst {
##
# ignore some special functions
#
set func [$db primitiveFuncOf $inst]
if {[info exists ClockedWithoutReset(ign:$func)]} {
continue
}
##
# get clock and reset pin
#
set clkPin [ClockedWithoutReset:_getFuncPin $db $inst "clock"]
set rstPin [ClockedWithoutReset:_getFuncPin $db $inst "reset"]
##
# ignore if both are missing
#
if {($clkPin == {}) || ($rstPin == {})} {
continue
}
##
# get net connected to clock and to reset pin.
#
set clkNet [ClockedWithoutReset:_connectedNet $db $clkPin]
set rstNet [ClockedWithoutReset:_connectedNet $db $rstPin]
##
# ignore if both unconnected.
#
if {($clkNet == {}) && ($rstNet == {})} {
continuezzzzzzzzzzz
}
##
# report if reset is unconnected
#
if {$rstNet == {}} {
set msg "Unconnected reset $rstPin at $inst"
ClockedWithoutReset:_report $db $inst $msg
}
##
# Check for clock and corresponding reset nets.
#
ClockedWithoutReset:_check $db $inst $clkNet $rstNet
}
}
# -----------------------------------------------------------------------------
# _initConfig - Init search pairs.
# -----------------------------------------------------------------------------
#
proc ClockedWithoutReset:_initConfig {} {
global ClockedWithoutReset
array unset ClockedWithoutReset clock:*
array unset ClockedWithoutReset pair:*
array unset ClockedWithoutReset ign:*
set clkNames [gui plugin getConfigValue ClockedWithoutReset 1clkNames]
set rstNames [gui plugin getConfigValue ClockedWithoutReset 2rstNames]
set ignFuncs [gui plugin getConfigValue ClockedWithoutReset 3ignFuncs]
if {[llength $clkNames] != [llength $rstNames]} {
zmessage print WAR "Configured clock and reset name lists must match"
return
}
foreach clkName $clkNames rstName $rstNames {
set ClockedWithoutReset(clock:$clkName) 1
set ClockedWithoutReset(pair:$clkName:$rstName) 1
}
foreach ignFunc $ignFuncs {
set ClockedWithoutReset(ign:$ignFunc) 1
}
}
# -----------------------------------------------------------------------------
# _getFuncPin - Get the pin OID with the given function.
# -----------------------------------------------------------------------------
#
proc ClockedWithoutReset:_getFuncPin {db inst function} {
if {[catch {
set pin [$db getFuncPort $inst -name $function]
} msg]} {
zmessage print WAR "Cannot get '$function' pin at $inst"
set pin {}
}
return $pin
}
# -----------------------------------------------------------------------------
# _connectedNet - Get the net connected to the given pin.
# -----------------------------------------------------------------------------
#
proc ClockedWithoutReset:_connectedNet {db pin} {
set connectedNet {}
if {[$db oid type $pin] eq "pin"} {
if {[$db isConnected $pin]} {
set connectedNet [$db connectedNet $pin]
}
} else {
$db foreach pin $pin subPin {
if {[$db isConnected $subPin]} {
set connectedNet [$db connectedNet $subPin]
if {[$db isBusMember $connectedNet]} {
set connectedNet [$db busOf $connectedNet]
}
break
}
}
}
return $connectedNet
}
# -----------------------------------------------------------------------------
# _report - add @comment message and add it to memory window.
# -----------------------------------------------------------------------------
#
proc ClockedWithoutReset:_report {db inst msg} {
zmessage print WAR $msg
$db attr $inst set @comment=$msg
gui mem append [list $inst]
}
# -----------------------------------------------------------------------------
# _check - Get given clock / reset pair.
# -----------------------------------------------------------------------------
#
proc ClockedWithoutReset:_check {db inst clkNet rstNet} {
global ClockedWithoutReset
##
# Check for constant values at reset net.
#
set v [$db value $rstNet]
if {($v eq "0") || ($v eq "1")} {
return
}
set clkName [$db oid oname $clkNet]
set rstName [$db oid oname $rstNet]
set clkName [string toupper $clkName]
set rstName [string toupper $rstName]
if {![info exists ClockedWithoutReset(clock:$clkName)]} {
set msg "Unknown clock net $clkName at $inst"
ClockedWithoutReset:_report $db $inst $msg
return
}
if {![info exists ClockedWithoutReset(pair:$clkName:$rstName)]} {
set msg "Unexpected reset net $rstName for $clkName at $inst"
ClockedWithoutReset:_report $db $inst $msg
return
}
}
# =============================================================================
# Call the initialization procedure.
# =============================================================================
#
ClockedWithoutReset:Init
|