2 * yosys -- Yosys Open SYnthesis Suite
4 * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include "kernel/yosys.h"
21 #include "kernel/sigtools.h"
24 PRIVATE_NAMESPACE_BEGIN
26 void split_portname_pair(std::string
&port1
, std::string
&port2
)
28 size_t pos
= port1
.find_first_of(':');
29 if (pos
!= std::string::npos
) {
30 port2
= port1
.substr(pos
+1);
31 port1
= port1
.substr(0, pos
);
35 struct IopadmapPass
: public Pass
{
36 IopadmapPass() : Pass("iopadmap", "technology mapping of i/o pads (or buffers)") { }
40 log(" iopadmap [options] [selection]\n");
42 log("Map module inputs/outputs to PAD cells from a library. This pass\n");
43 log("can only map to very simple PAD cells. Use 'techmap' to further map\n");
44 log("the resulting cells to more sophisticated PAD cells.\n");
46 log(" -inpad <celltype> <portname>[:<portname>]\n");
47 log(" Map module input ports to the given cell type with the\n");
48 log(" given output port name. if a 2nd portname is given, the\n");
49 log(" signal is passed through the pad call, using the 2nd\n");
50 log(" portname as the port facing the module port.\n");
52 log(" -outpad <celltype> <portname>[:<portname>]\n");
53 log(" -inoutpad <celltype> <portname>[:<portname>]\n");
54 log(" Similar to -inpad, but for output and inout ports.\n");
56 log(" -toutpad <celltype> <portname>:<portname>[:<portname>]\n");
57 log(" Merges $_TBUF_ cells into the output pad cell. This takes precedence\n");
58 log(" over the other -outpad cell. The first portname is the enable input\n");
59 log(" of the tristate driver.\n");
61 log(" -tinoutpad <celltype> <portname>:<portname>:<portname>[:<portname>]\n");
62 log(" Merges $_TBUF_ cells into the inout pad cell. This takes precedence\n");
63 log(" over the other -inoutpad cell. The first portname is the enable input\n");
64 log(" of the tristate driver and the 2nd portname is the internal output\n");
65 log(" buffering the external signal.\n");
67 log(" -widthparam <param_name>\n");
68 log(" Use the specified parameter name to set the port width.\n");
70 log(" -nameparam <param_name>\n");
71 log(" Use the specified parameter to set the port name.\n");
74 log(" create individual bit-wide buffers even for ports that\n");
75 log(" are wider. (the default behavior is to create word-wide\n");
76 log(" buffers using -widthparam to set the word size on the cell.)\n");
78 log("Tristate PADS (-toutpad, -tinoutpad) always operate in -bits mode.\n");
81 virtual void execute(std::vector
<std::string
> args
, RTLIL::Design
*design
)
83 log_header(design
, "Executing IOPADMAP pass (mapping inputs/outputs to IO-PAD cells).\n");
85 std::string inpad_celltype
, inpad_portname
, inpad_portname2
;
86 std::string outpad_celltype
, outpad_portname
, outpad_portname2
;
87 std::string inoutpad_celltype
, inoutpad_portname
, inoutpad_portname2
;
88 std::string toutpad_celltype
, toutpad_portname
, toutpad_portname2
, toutpad_portname3
;
89 std::string tinoutpad_celltype
, tinoutpad_portname
, tinoutpad_portname2
, tinoutpad_portname3
, tinoutpad_portname4
;
90 std::string widthparam
, nameparam
;
91 bool flag_bits
= false;
94 for (argidx
= 1; argidx
< args
.size(); argidx
++)
96 std::string arg
= args
[argidx
];
97 if (arg
== "-inpad" && argidx
+2 < args
.size()) {
98 inpad_celltype
= args
[++argidx
];
99 inpad_portname
= args
[++argidx
];
100 split_portname_pair(inpad_portname
, inpad_portname2
);
103 if (arg
== "-outpad" && argidx
+2 < args
.size()) {
104 outpad_celltype
= args
[++argidx
];
105 outpad_portname
= args
[++argidx
];
106 split_portname_pair(outpad_portname
, outpad_portname2
);
109 if (arg
== "-inoutpad" && argidx
+2 < args
.size()) {
110 inoutpad_celltype
= args
[++argidx
];
111 inoutpad_portname
= args
[++argidx
];
112 split_portname_pair(inoutpad_portname
, inoutpad_portname2
);
115 if (arg
== "-toutpad" && argidx
+2 < args
.size()) {
116 toutpad_celltype
= args
[++argidx
];
117 toutpad_portname
= args
[++argidx
];
118 split_portname_pair(toutpad_portname
, toutpad_portname2
);
119 split_portname_pair(toutpad_portname2
, toutpad_portname3
);
122 if (arg
== "-tinoutpad" && argidx
+2 < args
.size()) {
123 tinoutpad_celltype
= args
[++argidx
];
124 tinoutpad_portname
= args
[++argidx
];
125 split_portname_pair(tinoutpad_portname
, tinoutpad_portname2
);
126 split_portname_pair(tinoutpad_portname2
, tinoutpad_portname3
);
127 split_portname_pair(tinoutpad_portname3
, tinoutpad_portname4
);
130 if (arg
== "-widthparam" && argidx
+1 < args
.size()) {
131 widthparam
= args
[++argidx
];
134 if (arg
== "-nameparam" && argidx
+1 < args
.size()) {
135 nameparam
= args
[++argidx
];
138 if (arg
== "-bits") {
144 extra_args(args
, argidx
, design
);
146 for (auto module
: design
->selected_modules())
148 dict
<IdString
, pool
<int>> skip_wires
;
150 if (!toutpad_celltype
.empty() || !tinoutpad_celltype
.empty())
152 SigMap
sigmap(module
);
153 dict
<SigBit
, pair
<IdString
, pool
<IdString
>>> tbuf_bits
;
155 for (auto cell
: module
->cells())
156 if (cell
->type
== "$_TBUF_") {
157 SigBit bit
= sigmap(cell
->getPort("\\Y").as_bit());
158 tbuf_bits
[bit
].first
= cell
->name
;
161 for (auto cell
: module
->cells())
162 for (auto port
: cell
->connections())
163 for (auto bit
: sigmap(port
.second
))
164 if (tbuf_bits
.count(bit
))
165 tbuf_bits
.at(bit
).second
.insert(cell
->name
);
167 for (auto wire
: module
->selected_wires())
169 if (!wire
->port_output
)
172 for (int i
= 0; i
< GetSize(wire
); i
++)
174 SigBit
wire_bit(wire
, i
);
175 SigBit mapped_wire_bit
= sigmap(wire_bit
);
177 if (tbuf_bits
.count(mapped_wire_bit
) == 0)
180 auto &tbuf_cache
= tbuf_bits
.at(mapped_wire_bit
);
181 Cell
*tbuf_cell
= module
->cell(tbuf_cache
.first
);
183 if (tbuf_cell
== nullptr)
186 SigBit en_sig
= tbuf_cell
->getPort("\\E").as_bit();
187 SigBit data_sig
= tbuf_cell
->getPort("\\A").as_bit();
189 if (wire
->port_input
&& !tinoutpad_celltype
.empty())
191 log("Mapping port %s.%s[%d] using %s.\n", log_id(module
), log_id(wire
), i
, tinoutpad_celltype
.c_str());
193 Cell
*cell
= module
->addCell(NEW_ID
, RTLIL::escape_id(tinoutpad_celltype
));
194 Wire
*owire
= module
->addWire(NEW_ID
);
196 cell
->setPort(RTLIL::escape_id(tinoutpad_portname
), en_sig
);
197 cell
->setPort(RTLIL::escape_id(tinoutpad_portname2
), owire
);
198 cell
->setPort(RTLIL::escape_id(tinoutpad_portname3
), data_sig
);
199 cell
->setPort(RTLIL::escape_id(tinoutpad_portname4
), wire_bit
);
200 cell
->attributes
["\\keep"] = RTLIL::Const(1);
202 for (auto cn
: tbuf_cache
.second
) {
203 auto c
= module
->cell(cn
);
206 for (auto port
: c
->connections()) {
207 SigSpec sig
= port
.second
;
209 for (auto &bit
: sig
)
210 if (sigmap(bit
) == mapped_wire_bit
) {
215 c
->setPort(port
.first
, sig
);
220 module
->remove(tbuf_cell
);
221 skip_wires
[wire
->name
].insert(i
);
225 if (!wire
->port_input
&& !toutpad_celltype
.empty())
227 log("Mapping port %s.%s[%d] using %s.\n", log_id(module
), log_id(wire
), i
, toutpad_celltype
.c_str());
229 Cell
*cell
= module
->addCell(NEW_ID
, RTLIL::escape_id(toutpad_celltype
));
231 cell
->setPort(RTLIL::escape_id(toutpad_portname
), en_sig
);
232 cell
->setPort(RTLIL::escape_id(toutpad_portname2
), data_sig
);
233 cell
->setPort(RTLIL::escape_id(toutpad_portname3
), wire_bit
);
234 cell
->attributes
["\\keep"] = RTLIL::Const(1);
236 for (auto cn
: tbuf_cache
.second
) {
237 auto c
= module
->cell(cn
);
240 for (auto port
: c
->connections()) {
241 SigSpec sig
= port
.second
;
243 for (auto &bit
: sig
)
244 if (sigmap(bit
) == mapped_wire_bit
) {
249 c
->setPort(port
.first
, sig
);
253 module
->remove(tbuf_cell
);
254 skip_wires
[wire
->name
].insert(i
);
261 for (auto wire
: module
->selected_wires())
266 std::string celltype
, portname
, portname2
;
267 pool
<int> skip_bit_indices
;
269 if (skip_wires
.count(wire
->name
)) {
272 skip_bit_indices
= skip_wires
.at(wire
->name
);
275 if (wire
->port_input
&& !wire
->port_output
) {
276 if (inpad_celltype
.empty()) {
277 log("Don't map input port %s.%s: Missing option -inpad.\n", RTLIL::id2cstr(module
->name
), RTLIL::id2cstr(wire
->name
));
280 celltype
= inpad_celltype
;
281 portname
= inpad_portname
;
282 portname2
= inpad_portname2
;
284 if (!wire
->port_input
&& wire
->port_output
) {
285 if (outpad_celltype
.empty()) {
286 log("Don't map output port %s.%s: Missing option -outpad.\n", RTLIL::id2cstr(module
->name
), RTLIL::id2cstr(wire
->name
));
289 celltype
= outpad_celltype
;
290 portname
= outpad_portname
;
291 portname2
= outpad_portname2
;
293 if (wire
->port_input
&& wire
->port_output
) {
294 if (inoutpad_celltype
.empty()) {
295 log("Don't map inout port %s.%s: Missing option -inoutpad.\n", RTLIL::id2cstr(module
->name
), RTLIL::id2cstr(wire
->name
));
298 celltype
= inoutpad_celltype
;
299 portname
= inoutpad_portname
;
300 portname2
= inoutpad_portname2
;
304 if (!flag_bits
&& wire
->width
!= 1 && widthparam
.empty()) {
305 log("Don't map multi-bit port %s.%s: Missing option -widthparam or -bits.\n", RTLIL::id2cstr(module
->name
), RTLIL::id2cstr(wire
->name
));
309 log("Mapping port %s.%s using %s.\n", RTLIL::id2cstr(module
->name
), RTLIL::id2cstr(wire
->name
), celltype
.c_str());
311 RTLIL::Wire
*new_wire
= NULL
;
312 if (!portname2
.empty()) {
313 new_wire
= module
->addWire(NEW_ID
, wire
);
314 module
->swap_names(new_wire
, wire
);
315 wire
->attributes
.clear();
320 for (int i
= 0; i
< wire
->width
; i
++)
322 if (skip_bit_indices
.count(i
)) {
323 if (wire
->port_output
)
324 module
->connect(SigSpec(new_wire
, i
), SigSpec(wire
, i
));
326 module
->connect(SigSpec(wire
, i
), SigSpec(new_wire
, i
));
330 RTLIL::Cell
*cell
= module
->addCell(NEW_ID
, RTLIL::escape_id(celltype
));
331 cell
->setPort(RTLIL::escape_id(portname
), RTLIL::SigSpec(wire
, i
));
332 if (!portname2
.empty())
333 cell
->setPort(RTLIL::escape_id(portname2
), RTLIL::SigSpec(new_wire
, i
));
334 if (!widthparam
.empty())
335 cell
->parameters
[RTLIL::escape_id(widthparam
)] = RTLIL::Const(1);
336 if (!nameparam
.empty())
337 cell
->parameters
[RTLIL::escape_id(nameparam
)] = RTLIL::Const(stringf("%s[%d]", RTLIL::id2cstr(wire
->name
), i
));
338 cell
->attributes
["\\keep"] = RTLIL::Const(1);
343 RTLIL::Cell
*cell
= module
->addCell(NEW_ID
, RTLIL::escape_id(celltype
));
344 cell
->setPort(RTLIL::escape_id(portname
), RTLIL::SigSpec(wire
));
345 if (!portname2
.empty())
346 cell
->setPort(RTLIL::escape_id(portname2
), RTLIL::SigSpec(new_wire
));
347 if (!widthparam
.empty())
348 cell
->parameters
[RTLIL::escape_id(widthparam
)] = RTLIL::Const(wire
->width
);
349 if (!nameparam
.empty())
350 cell
->parameters
[RTLIL::escape_id(nameparam
)] = RTLIL::Const(RTLIL::id2cstr(wire
->name
));
351 cell
->attributes
["\\keep"] = RTLIL::Const(1);
355 wire
->port_input
= false;
356 wire
->port_output
= false;
359 module
->fixup_ports();
364 PRIVATE_NAMESPACE_END