coolrunner2: Initial commit

3 files changed, 223 insertions, 0 deletions

diff --git a/techlibs/coolrunner2/Makefile.inc b/techlibs/coolrunner2/Makefile.inc
new file mode 100644
index 000000000..516238330
--- /dev/null
+++ b/techlibs/coolrunner2/Makefile.inc
@@ -0,0 +1,4 @@
+
+OBJS += techlibs/coolrunner2/synth_coolrunner2.o
+
+$(eval $(call add_share_file,share/coolrunner2,techlibs/coolrunner2/cells_sim.v))
diff --git a/techlibs/coolrunner2/cells_sim.v b/techlibs/coolrunner2/cells_sim.v
new file mode 100644
index 000000000..328e7504d
--- /dev/null
+++ b/techlibs/coolrunner2/cells_sim.v
@@ -0,0 +1,41 @@
+module IBUF(input I, output O);
+    assign O = I;
+endmodule
+
+module IOBUFE(input I, input E, output O, inout IO);
+    assign O = IO;
+    assign IO = E ? I : 1'bz;
+endmodule
+
+module ANDTERM(IN, OUT);
+    parameter WIDTH = 0;
+
+    input [(WIDTH*2)-1:0] IN;
+    output reg OUT;
+
+    integer i;
+
+    always @(*) begin
+        OUT = 1;
+        for (i = 0; i < WIDTH; i=i+1) begin
+            OUT = OUT & ~IN[i * 2 + 0];
+            OUT = OUT & IN[i * 2 + 1];
+        end
+    end
+endmodule
+
+module ORTERM(IN, OUT);
+    parameter WIDTH = 0;
+
+    input [WIDTH-1:0] IN;
+    output reg OUT;
+
+    integer i;
+
+    always @(*) begin
+        OUT = 0;
+        for (i = 0; i < WIDTH; i=i+1) begin
+            OUT = OUT | IN[i];
+        end
+    end
+endmodule
diff --git a/techlibs/coolrunner2/synth_coolrunner2.cpp b/techlibs/coolrunner2/synth_coolrunner2.cpp
new file mode 100644
index 000000000..cc6f6401d
--- /dev/null
+++ b/techlibs/coolrunner2/synth_coolrunner2.cpp
@@ -0,0 +1,178 @@
+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2017 Robert Ou <rqou@robertou.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "kernel/register.h"
+#include "kernel/celltypes.h"
+#include "kernel/rtlil.h"
+#include "kernel/log.h"
+
+USING_YOSYS_NAMESPACE
+PRIVATE_NAMESPACE_BEGIN
+
+struct SynthCoolrunner2Pass : public ScriptPass
+{
+    SynthCoolrunner2Pass() : ScriptPass("synth_coolrunner2", "synthesis for Xilinx Coolrunner-II CPLDs") { }
+
+    virtual void help() YS_OVERRIDE
+    {
+        //   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+        log("\n");
+        log("    synth_coolrunner2 [options]\n");
+        log("\n");
+        log("This command runs synthesis for Coolrunner-II CPLDs. This work is experimental.\n");
+        log("It is intended to be used with https://github.com/azonenberg/openfpga as the\n");
+        log("place-and-route.\n");
+        log("\n");
+        log("    -top <module>\n");
+        log("        use the specified module as top module (default='top')\n");
+        log("\n");
+        log("    -json <file>\n");
+        log("        write the design to the specified JSON file. writing of an output file\n");
+        log("        is omitted if this parameter is not specified.\n");
+        log("\n");
+        log("    -run <from_label>:<to_label>\n");
+        log("        only run the commands between the labels (see below). an empty\n");
+        log("        from label is synonymous to 'begin', and empty to label is\n");
+        log("        synonymous to the end of the command list.\n");
+        log("\n");
+        log("    -noflatten\n");
+        log("        do not flatten design before synthesis\n");
+        log("\n");
+        log("    -retime\n");
+        log("        run 'abc' with -dff option\n");
+        log("\n");
+        log("\n");
+        log("The following commands are executed by this synthesis command:\n");
+        help_script();
+        log("\n");
+    }
+
+    string top_opt, json_file;
+    bool flatten, retime;
+
+    virtual void clear_flags() YS_OVERRIDE
+    {
+        top_opt = "-auto-top";
+        json_file = "";
+        flatten = true;
+        retime = false;
+    }
+
+    virtual void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
+    {
+        string run_from, run_to;
+        clear_flags();
+
+        size_t argidx;
+        for (argidx = 1; argidx < args.size(); argidx++)
+        {
+            if (args[argidx] == "-top" && argidx+1 < args.size()) {
+                top_opt = "-top " + args[++argidx];
+                continue;
+            }
+            if (args[argidx] == "-json" && argidx+1 < args.size()) {
+                json_file = args[++argidx];
+                continue;
+            }
+            if (args[argidx] == "-run" && argidx+1 < args.size()) {
+                size_t pos = args[argidx+1].find(':');
+                if (pos == std::string::npos)
+                    break;
+                run_from = args[++argidx].substr(0, pos);
+                run_to = args[argidx].substr(pos+1);
+                continue;
+            }
+            if (args[argidx] == "-noflatten") {
+                flatten = false;
+                continue;
+            }
+            if (args[argidx] == "-retime") {
+                retime = true;
+                continue;
+            }
+            break;
+        }
+        extra_args(args, argidx, design);
+
+        if (!design->full_selection())
+            log_cmd_error("This comannd only operates on fully selected designs!\n");
+
+        log_header(design, "Executing SYNTH_COOLRUNNER2 pass.\n");
+        log_push();
+
+        run_script(design, run_from, run_to);
+
+        log_pop();
+    }
+
+    virtual void script() YS_OVERRIDE
+    {
+        if (check_label("begin"))
+        {
+            run("read_verilog -lib +/coolrunner2/cells_sim.v");
+            run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
+        }
+
+        if (flatten && check_label("flatten", "(unless -noflatten)"))
+        {
+            run("proc");
+            run("flatten");
+            run("tribuf -logic");
+        }
+
+        if (check_label("coarse"))
+        {
+            run("synth -run coarse");
+        }
+
+        if (check_label("fine"))
+        {
+            run("opt -fast -full");
+            run("techmap");
+        }
+
+        if (check_label("map_pla"))
+        {
+            run("abc -sop -I 40 -P 56");
+            run("opt -fast");
+        }
+
+        if (check_label("map_cells"))
+        {
+            run("iopadmap -bits -inpad IBUF O:I -outpad IOBUFE I:IO -inoutpad IOBUFE O:IO -toutpad IOBUFE E:I:IO -tinoutpad IOBUFE E:O:I:IO");
+        }
+
+        if (check_label("check"))
+        {
+            run("hierarchy -check");
+            run("stat");
+            run("check -noinit");
+        }
+
+        if (check_label("json"))
+        {
+            if (!json_file.empty() || help_mode)
+                run(stringf("write_json %s", help_mode ? "<file-name>" : json_file.c_str()));
+        }
+
+        log_pop();
+    }
+} SynthCoolrunner2Pass;
+
+PRIVATE_NAMESPACE_END