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author | Clifford Wolf <clifford@clifford.at> | 2013-10-26 22:27:40 +0200 |
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committer | Clifford Wolf <clifford@clifford.at> | 2013-10-26 22:27:40 +0200 |
commit | ceb971eab9802e695e52064d4f7369ab6daea3b3 (patch) | |
tree | 9bfc3c4c5235bedd8649829084a9b478904ff6ad /passes/techmap | |
parent | b934a2d20940de78c1d33ebe481e4230744392b5 (diff) | |
download | yosys-ceb971eab9802e695e52064d4f7369ab6daea3b3.tar.gz yosys-ceb971eab9802e695e52064d4f7369ab6daea3b3.tar.bz2 yosys-ceb971eab9802e695e52064d4f7369ab6daea3b3.zip |
Added support for i/o buffers to iopadmap
Diffstat (limited to 'passes/techmap')
-rw-r--r-- | passes/techmap/iopadmap.cc | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/passes/techmap/iopadmap.cc b/passes/techmap/iopadmap.cc index 134211e5f..b98214977 100644 --- a/passes/techmap/iopadmap.cc +++ b/passes/techmap/iopadmap.cc @@ -21,8 +21,17 @@ #include "kernel/rtlil.h" #include "kernel/log.h" +static void split_portname_pair(std::string &port1, std::string &port2) +{ + size_t pos = port1.find_first_of(':'); + if (pos != std::string::npos) { + port2 = port1.substr(pos+1); + port1 = port1.substr(0, pos); + } +} + struct IopadmapPass : public Pass { - IopadmapPass() : Pass("iopadmap", "technology mapping of flip-flops") { } + IopadmapPass() : Pass("iopadmap", "technology mapping of i/o pads (or buffers)") { } virtual void help() { log("\n"); @@ -32,12 +41,14 @@ struct IopadmapPass : public Pass { log("can only map to very simple PAD cells. Use 'techmap' to further map\n"); log("the resulting cells to more sophisticated PAD cells.\n"); log("\n"); - log(" -inpad <celltype> <portname>\n"); + log(" -inpad <celltype> <portname>[:<portname>]\n"); log(" Map module input ports to the given cell type with\n"); - log(" the given port name.\n"); + log(" the given port name. if a 2nd portname is given, the\n"); + log(" signal is passed through the pad call, using the 2nd\n"); + log(" portname as output.\n"); log("\n"); - log(" -outpad <celltype> <portname>\n"); - log(" -inoutpad <celltype> <portname>\n"); + log(" -outpad <celltype> <portname>[:<portname>]\n"); + log(" -inoutpad <celltype> <portname>[:<portname>]\n"); log(" Similar to -inpad, but for output and inout ports.\n"); log("\n"); log(" -widthparam <param_name>\n"); @@ -51,9 +62,9 @@ struct IopadmapPass : public Pass { { log_header("Executing IOPADMAP pass (mapping inputs/outputs to IO-PAD cells).\n"); - std::string inpad_celltype, inpad_portname; - std::string outpad_celltype, outpad_portname; - std::string inoutpad_celltype, inoutpad_portname; + std::string inpad_celltype, inpad_portname, inpad_portname2; + std::string outpad_celltype, outpad_portname, outpad_portname2; + std::string inoutpad_celltype, inoutpad_portname, inoutpad_portname2; std::string widthparam, nameparam; size_t argidx; @@ -63,16 +74,19 @@ struct IopadmapPass : public Pass { if (arg == "-inpad" && argidx+2 < args.size()) { inpad_celltype = args[++argidx]; inpad_portname = args[++argidx]; + split_portname_pair(inpad_portname, inpad_portname2); continue; } if (arg == "-outpad" && argidx+2 < args.size()) { outpad_celltype = args[++argidx]; outpad_portname = args[++argidx]; + split_portname_pair(outpad_portname, outpad_portname2); continue; } if (arg == "-inoutpad" && argidx+2 < args.size()) { inoutpad_celltype = args[++argidx]; inoutpad_portname = args[++argidx]; + split_portname_pair(inoutpad_portname, inoutpad_portname2); continue; } if (arg == "-widthparam" && argidx+1 < args.size()) { @@ -101,7 +115,7 @@ struct IopadmapPass : public Pass { if (!wire->port_id || !design->selected(module, wire)) continue; - std::string celltype, portname; + std::string celltype, portname, portname2; if (wire->port_input && !wire->port_output) { if (inpad_celltype.empty()) { @@ -110,6 +124,7 @@ struct IopadmapPass : public Pass { } celltype = inpad_celltype; portname = inpad_portname; + portname2 = inpad_portname2; } else if (!wire->port_input && wire->port_output) { if (outpad_celltype.empty()) { @@ -118,6 +133,7 @@ struct IopadmapPass : public Pass { } celltype = outpad_celltype; portname = outpad_portname; + portname2 = outpad_portname2; } else if (wire->port_input && wire->port_output) { if (inoutpad_celltype.empty()) { @@ -126,6 +142,7 @@ struct IopadmapPass : public Pass { } celltype = inoutpad_celltype; portname = inoutpad_portname; + portname2 = inoutpad_portname2; } else log_abort(); @@ -134,12 +151,20 @@ struct IopadmapPass : public Pass { continue; } - log("Mapping port %s.%s.\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire->name)); + log("Mapping port %s.%s using %s.\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire->name), celltype.c_str()); RTLIL::Cell *cell = new RTLIL::Cell; cell->name = NEW_ID; cell->type = RTLIL::escape_id(celltype); cell->connections[RTLIL::escape_id(portname)] = RTLIL::SigSpec(wire); + if (!portname2.empty()) { + RTLIL::Wire *new_wire = new RTLIL::Wire; + *new_wire = *wire; + wire->name = NEW_ID; + module->wires[wire->name] = wire; + module->wires[new_wire->name] = new_wire; + cell->connections[RTLIL::escape_id(portname2)] = RTLIL::SigSpec(new_wire); + } if (!widthparam.empty()) cell->parameters[RTLIL::escape_id(widthparam)] = RTLIL::Const(wire->width); if (!nameparam.empty()) |