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1 6 julius 
//////////////////////////////////////////////////////////////////////
2 
////                                                              ////
3 449 julius 
////  or1200_monitor.v                                            ////
4 360 julius 
////                                                              ////
5 
////  OR1200 processor monitor module                             ////
6 
////                                                              ////
7 449 julius 
////  Author(s):                                                  ////
8 
////      - Damjan Lampret, lampret@opencores.org                 ////
9 
////      - Julius Baxter, julius@opencores.org                   ////
10 
////                                                              ////
11 360 julius 
//////////////////////////////////////////////////////////////////////
12 
////                                                              ////
13 348 julius 
//// Copyright (C) 2009, 2010 Authors and OPENCORES.ORG           ////
14 6 julius 
////                                                              ////
15 
//// This source file may be used and distributed without         ////
16 
//// restriction provided that this copyright statement is not    ////
17 
//// removed from the file and that any derivative work contains  ////
18 
//// the original copyright notice and the associated disclaimer. ////
19 
////                                                              ////
20 
//// This source file is free software; you can redistribute it   ////
21 
//// and/or modify it under the terms of the GNU Lesser General   ////
22 
//// Public License as published by the Free Software Foundation; ////
23 
//// either version 2.1 of the License, or (at your option) any   ////
24 
//// later version.                                               ////
25 
////                                                              ////
26 
//// This source is distributed in the hope that it will be       ////
27 
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
28 
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
29 
//// PURPOSE.  See the GNU Lesser General Public License for more ////
30 
//// details.                                                     ////
31 
////                                                              ////
32 
//// You should have received a copy of the GNU Lesser General    ////
33 
//// Public License along with this source; if not, download it   ////
34 
//// from http://www.opencores.org/lgpl.shtml                     ////
35 
////                                                              ////
36 
//////////////////////////////////////////////////////////////////////
37 67 julius 
 
38 55 julius 
`include "timescale.v"
39 6 julius 
`include "or1200_defines.v"
40 485 julius 
`include "or1200_monitor_defines.v"
41 360 julius 
`include "test-defines.v"
42 415 julius 
 
43 449 julius 
 
44 6 julius 
module or1200_monitor;
45 
 
46 
   integer fexe;
47 449 julius 
   integer finsn;
48 
 
49 6 julius 
   reg [23:0] ref;
50 397 julius 
`ifdef OR1200_MONITOR_SPRS
51 6 julius 
   integer    fspr;
52 397 julius 
`endif
53 6 julius 
   integer    fgeneral;
54 397 julius 
`ifdef OR1200_MONITOR_LOOKUP
55 6 julius 
   integer    flookup;
56 397 julius 
`endif
57 6 julius 
   integer    r3;
58 
   integer    insns;
59 
 
60 348 julius 
 
61 6 julius 
   //
62 
   // Initialization
63 
   //
64 
   initial begin
65 
      ref = 0;
66 397 julius 
`ifdef OR1200_MONITOR_EXEC_STATE
67 360 julius 
      fexe = $fopen({"../out/",`TEST_NAME_STRING,"-executed.log"});
68 449 julius 
`endif
69 
`ifdef OR1200_MONITOR_EXEC_LOG_DISASSEMBLY
70 
      finsn = fexe;
71 397 julius 
`endif
72 6 julius 
      $timeformat (-9, 2, " ns", 12);
73 397 julius 
`ifdef OR1200_MONITOR_SPRS
74 360 julius 
      fspr = $fopen({"../out/",`TEST_NAME_STRING,"-sprs.log"});
75 397 julius 
`endif
76 360 julius 
      fgeneral = $fopen({"../out/",`TEST_NAME_STRING,"-general.log"});
77 397 julius 
`ifdef OR1200_MONITOR_LOOKUP
78 360 julius 
      flookup = $fopen({"../out/",`TEST_NAME_STRING,"-lookup.log"});
79 397 julius 
`endif
80 6 julius 
      insns = 0;
81 
 
82 
   end
83 
 
84 
   //
85 
   // Get GPR
86 
   //
87 
   task get_gpr;
88 
      input     [4:0]    gpr_no;
89 
      output [31:0]      gpr;
90 
      integer           j;
91 
      begin
92 348 julius 
 
93 449 julius 
`ifdef OR1200_RFRAM_GENERIC
94 6 julius 
         for(j = 0; j < 32; j = j + 1) begin
95 348 julius 
            gpr[j] = `OR1200_TOP.`CPU_cpu.`CPU_rf.rf_a.mem[gpr_no*32+j];
96 6 julius 
         end
97 348 julius 
 
98 449 julius 
`else
99 348 julius 
         //gpr = `OR1200_TOP.`CPU_cpu.`CPU_rf.rf_a.mem[gpr_no];
100 
         gpr = `OR1200_TOP.`CPU_cpu.`CPU_rf.rf_a.get_gpr(gpr_no);
101 
 
102 449 julius 
`endif
103 6 julius 
 
104 348 julius 
 
105 
      end
106 
   endtask
107 
 
108 6 julius 
   //
109 
   // Write state of the OR1200 registers into a file
110 
   //
111 
   // Limitation: only a small subset of register file RAMs
112 
   // are supported
113 
   //
114 
   task display_arch_state;
115 
      reg [5:0] i;
116 
      reg [31:0] r;
117 
      integer    j;
118 
      begin
119 397 julius 
`ifdef OR1200_MONITOR_EXEC_STATE
120 6 julius 
         ref = ref + 1;
121 397 julius 
 `ifdef OR1200_MONITOR_LOOKUP
122 6 julius 
         $fdisplay(flookup, "Instruction %d: %t", insns, $time);
123 397 julius 
 `endif
124 351 julius 
         $fwrite(fexe, "\nEXECUTED(%d): %h:  %h", insns,
125 
                 `OR1200_TOP.`CPU_cpu.`CPU_except.wb_pc,
126 
                 `OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn);
127 449 julius 
 `ifdef OR1200_MONITOR_EXEC_LOG_DISASSEMBLY
128 351 julius 
         $fwrite(fexe,"\t");
129 
         // Decode the instruction, print it out
130 
         or1200_print_op(`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn);
131 
 `endif
132 6 julius 
         for(i = 0; i < 32; i = i + 1) begin
133 
            if (i % 4 == 0)
134 
              $fdisplay(fexe);
135 
            get_gpr(i, r);
136 
            $fwrite(fexe, "GPR%d: %h  ", i, r);
137 
         end
138 
         $fdisplay(fexe);
139 348 julius 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.sr;
140 6 julius 
         $fwrite(fexe, "SR   : %h  ", r);
141 348 julius 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.epcr;
142 6 julius 
         $fwrite(fexe, "EPCR0: %h  ", r);
143 348 julius 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.eear;
144 6 julius 
         $fwrite(fexe, "EEAR0: %h  ", r);
145 348 julius 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.esr;
146 6 julius 
         $fdisplay(fexe, "ESR0 : %h", r);
147 397 julius 
`endif //  `ifdef OR1200_MONITOR_EXEC_STATE
148 348 julius 
`ifdef OR1200_DISPLAY_EXECUTED
149 
         ref = ref + 1;
150 397 julius 
 `ifdef OR1200_MONITOR_LOOKUP
151 348 julius 
         $fdisplay(flookup, "Instruction %d: %t", insns, $time);
152 397 julius 
 `endif
153 348 julius 
         $fwrite(fexe, "\nEXECUTED(%d): %h:  %h", insns, `OR1200_TOP.`CPU_cpu.`CPU_except.wb_pc, `OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn);
154 6 julius 
`endif
155 348 julius 
         insns = insns + 1;
156 449 julius 
      end
157 6 julius 
   endtask // display_arch_state
158 
 
159 
   /* Keep a trace buffer of the last lot of instructions and addresses
160 
    * "executed",as read from the writeback stage, and cause a $finish if we hit
161 
    * an instruction that is invalid, such as all zeros.
162 
    * Currently, only breaks on an all zero instruction, but should probably be
163 
    * made to break for anything with an X in it too. And of course ideally this
164 
    * shouldn't be needed - but is handy if someone changes something and stops
165 
    * the test continuing forever.
166 
    */
167 49 julius 
   integer num_nul_inst;
168 
   initial num_nul_inst = 0;
169 449 julius 
 
170 6 julius 
   task monitor_for_crash;
171 348 julius 
`define OR1200_MONITOR_CRASH_TRACE_SIZE 32
172 
      //Trace buffer of 32 instructions
173 
      reg [31:0] insn_trace [0:`OR1200_MONITOR_CRASH_TRACE_SIZE-1];
174 
      //Trace buffer of the addresses of those instructions
175 
      reg [31:0] addr_trace [0:`OR1200_MONITOR_CRASH_TRACE_SIZE-1];
176 449 julius 
      integer    i;
177 6 julius 
 
178 449 julius 
      begin
179 
         if (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn == 32'h00000000)
180 
           num_nul_inst = num_nul_inst + 1;
181 
         else
182 
           num_nul_inst = 0; // Reset it
183 49 julius 
 
184 449 julius 
         if (num_nul_inst == 1000) // Sat a loop a bit too long...
185 
           begin
186 
              $fdisplay(fgeneral, "ERROR - no instruction at PC %h",
187 
                        `OR1200_TOP.`CPU_cpu.`CPU_except.wb_pc);
188 
              $fdisplay(fgeneral, "Crash trace: Last %d instructions: ",
189 
                        `OR1200_MONITOR_CRASH_TRACE_SIZE);
190 6 julius 
 
191 449 julius 
              $fdisplay(fgeneral, "PC\t\tINSTR");
192 
              for(i=`OR1200_MONITOR_CRASH_TRACE_SIZE-1;i>=0;i=i-1) begin
193 
                 $fdisplay(fgeneral, "%h\t%h",addr_trace[i], insn_trace[i]);
194 
              end
195 485 julius 
              $display("*");
196 
              $display("* or1200_monitor : OR1200 crash detected (suspected CPU PC corruption)");
197 
              $display("*");
198 
 
199 449 julius 
              #100 $finish;
200 
           end
201 
         else
202 
           begin
203 
              for(i=`OR1200_MONITOR_CRASH_TRACE_SIZE-1;i>0;i=i-1) begin
204 
                 insn_trace[i] = insn_trace[i-1];
205 
                 addr_trace[i] = addr_trace[i-1];
206 
              end
207 
              insn_trace[0] = `OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn;
208 
              addr_trace[0] = `OR1200_TOP.`CPU_cpu.`CPU_except.wb_pc;
209 
           end
210 
 
211 
      end
212 6 julius 
   endtask // monitor_for_crash
213 348 julius 
 
214 6 julius 
 
215 348 julius 
   //
216 
   // Write state of the OR1200 registers into a file; version for exception
217 
   //
218 
   task display_arch_state_except;
219 
      reg [5:0] i;
220 
      reg [31:0] r;
221 
      integer    j;
222 
      begin
223 397 julius 
`ifdef OR1200_MONITOR_EXEC_STATE
224 348 julius 
         ref = ref + 1;
225 397 julius 
 `ifdef OR1200_MONITOR_LOOKUP
226 348 julius 
         $fdisplay(flookup, "Instruction %d: %t", insns, $time);
227 397 julius 
 `endif
228 348 julius 
         $fwrite(fexe, "\nEXECUTED(%d): %h:  %h  (exception)", insns, `OR1200_TOP.`CPU_cpu.`CPU_except.ex_pc, `OR1200_TOP.`CPU_cpu.`CPU_ctrl.ex_insn);
229 
         for(i = 0; i < 32; i = i + 1) begin
230 
            if (i % 4 == 0)
231 
              $fdisplay(fexe);
232 
            get_gpr(i, r);
233 
            $fwrite(fexe, "GPR%d: %h  ", i, r);
234 
         end
235 
         $fdisplay(fexe);
236 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.sr;
237 
         $fwrite(fexe, "SR   : %h  ", r);
238 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.epcr;
239 
         $fwrite(fexe, "EPCR0: %h  ", r);
240 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.eear;
241 
         $fwrite(fexe, "EEAR0: %h  ", r);
242 
         r = `OR1200_TOP.`CPU_cpu.`CPU_sprs.esr;
243 
         $fdisplay(fexe, "ESR0 : %h", r);
244 
         insns = insns + 1;
245 397 julius 
`endif //  `ifdef OR1200_MONITOR_EXEC_STATE
246 348 julius 
`ifdef OR1200_DISPLAY_EXECUTED
247 
         ref = ref + 1;
248 397 julius 
 `ifdef OR1200_MONITOR_LOOKUP
249 348 julius 
         $fdisplay(flookup, "Instruction %d: %t", insns, $time);
250 397 julius 
 `endif
251 348 julius 
         $fwrite(fexe, "\nEXECUTED(%d): %h:  %h  (exception)", insns,
252 
                 `OR1200_TOP.`CPU_cpu.`CPU_except.ex_pc,
253 
                 `OR1200_TOP.`CPU_cpu.`CPU_ctrl.ex_insn);
254 
         insns = insns + 1;
255 
`endif
256 
 
257 449 julius 
      end
258 348 julius 
   endtask
259 
 
260 6 julius 
   integer iwb_progress;
261 
   reg [31:0] iwb_progress_addr;
262 
   //
263 
   // WISHBONE bus checker
264 
   //
265 
   always @(posedge `OR1200_TOP.iwb_clk_i)
266 
     if (`OR1200_TOP.iwb_rst_i) begin
267 
        iwb_progress = 0;
268 
        iwb_progress_addr = `OR1200_TOP.iwb_adr_o;
269 
     end
270 
     else begin
271 
        if (`OR1200_TOP.iwb_cyc_o && (iwb_progress != 2)) begin
272 
           iwb_progress = 1;
273 
        end
274 
        if (`OR1200_TOP.iwb_stb_o) begin
275 
           if (iwb_progress >= 1) begin
276 
              if (iwb_progress == 1)
277 
                iwb_progress_addr = `OR1200_TOP.iwb_adr_o;
278 
              iwb_progress = 2;
279 
           end
280 
           else begin
281 
              $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.iwb_stb_o raised without `OR1200_TOP.iwb_cyc_o, at %t\n", $time);
282 
              #100 $finish;
283 
           end
284 
        end
285 
        if (`OR1200_TOP.iwb_ack_i & `OR1200_TOP.iwb_err_i) begin
286 
           $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.iwb_ack_i and `OR1200_TOP.iwb_err_i raised at the same time, at %t\n", $time);
287 
        end
288 
        if ((iwb_progress == 2) && (iwb_progress_addr != `OR1200_TOP.iwb_adr_o)) begin
289 
           $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.iwb_adr_o changed while waiting for `OR1200_TOP.iwb_err_i/`OR1200_TOP.iwb_ack_i, at %t\n", $time);
290 
           #100 $finish;
291 
        end
292 
        if (`OR1200_TOP.iwb_ack_i | `OR1200_TOP.iwb_err_i)
293 
          if (iwb_progress == 2) begin
294 
             iwb_progress = 0;
295 
             iwb_progress_addr = `OR1200_TOP.iwb_adr_o;
296 
          end
297 
          else begin
298 
             $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.iwb_ack_i/`OR1200_TOP.iwb_err_i raised without `OR1200_TOP.iwb_cyc_i/`OR1200_TOP.iwb_stb_i, at %t\n", $time);
299 
             #100 $finish;
300 
          end
301 
        if ((iwb_progress == 2) && !`OR1200_TOP.iwb_stb_o) begin
302 
           $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.iwb_stb_o lowered without `OR1200_TOP.iwb_err_i/`OR1200_TOP.iwb_ack_i, at %t\n", $time);
303 348 julius 
           #100 $finish;
304 6 julius 
        end
305 
     end
306 
 
307 
   integer dwb_progress;
308 449 julius 
   reg [31:0] dwb_progress_addr;
309 
   //
310 
   // WISHBONE bus checker
311 
   //
312 
   always @(posedge `OR1200_TOP.dwb_clk_i)
313 
     if (`OR1200_TOP.dwb_rst_i)
314 
       dwb_progress = 0;
315 
     else begin
316 
        if (`OR1200_TOP.dwb_cyc_o && (dwb_progress != 2))
317 
          dwb_progress = 1;
318 
        if (`OR1200_TOP.dwb_stb_o)
319 
          if (dwb_progress >= 1) begin
320 
             if (dwb_progress == 1)
321 
               dwb_progress_addr = `OR1200_TOP.dwb_adr_o;
322 
             dwb_progress = 2;
323 
          end
324 
          else begin
325 
             $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.dwb_stb_o raised without `OR1200_TOP.dwb_cyc_o, at %t\n", $time);
326 
             #100 $finish;
327 
          end
328 
        if (`OR1200_TOP.dwb_ack_i & `OR1200_TOP.dwb_err_i) begin
329 
           $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.dwb_ack_i and `OR1200_TOP.dwb_err_i raised at the same time, at %t\n", $time);
330 
        end
331 
        if ((dwb_progress == 2) && (dwb_progress_addr != `OR1200_TOP.dwb_adr_o)) begin
332 
           $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.dwb_adr_o changed while waiting for `OR1200_TOP.dwb_err_i/`OR1200_TOP.dwb_ack_i, at %t\n", $time);
333 
           #100 $finish;
334 
        end
335 
        if (`OR1200_TOP.dwb_ack_i | `OR1200_TOP.dwb_err_i)
336 
          if (dwb_progress == 2) begin
337 
             dwb_progress = 0;
338 
             dwb_progress_addr = `OR1200_TOP.dwb_adr_o;
339 
          end
340 
          else begin
341 
             $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.dwb_ack_i/`OR1200_TOP.dwb_err_i raised without `OR1200_TOP.dwb_cyc_i/`OR1200_TOP.dwb_stb_i, at %t\n", $time);
342 
             #100 $finish;
343 
          end
344 
        if ((dwb_progress == 2) && !`OR1200_TOP.dwb_stb_o) begin
345 
           $fdisplay(fgeneral, "WISHBONE protocol violation: `OR1200_TOP.dwb_stb_o lowered without `OR1200_TOP.dwb_err_i/`OR1200_TOP.dwb_ack_i, at %t\n", $time);
346 
           #100 $finish;
347 
        end
348 6 julius 
     end
349 
 
350 449 julius 
   //
351 
   // Hooks for:
352 
   // - displaying registers
353 
   // - end of simulation
354 
   // - access to SPRs
355 
   //
356 
   always @(posedge `CPU_CORE_CLK)
357 348 julius 
     if (!`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_freeze) begin
358 449 julius 
        //      #2;
359 348 julius 
        if (((`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn[31:26] != `OR1200_OR32_NOP)
360 
             | !`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn[16])
361 
            & !(`OR1200_TOP.`CPU_cpu.`CPU_except.except_flushpipe &
362 
                `OR1200_TOP.`CPU_cpu.`CPU_except.ex_dslot))
363 6 julius 
          begin
364 
             display_arch_state;
365 
             monitor_for_crash;
366 
          end
367 
        else
368 348 julius 
          if (`OR1200_TOP.`CPU_cpu.`CPU_except.except_flushpipe)
369 6 julius 
            display_arch_state_except;
370 348 julius 
        // small hack to stop simulation (l.nop 1):
371 
        if (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn == 32'h1500_0001) begin
372 6 julius 
           get_gpr(3, r3);
373 
           $fdisplay(fgeneral, "%t: l.nop exit (%h)", $time, r3);
374 456 julius 
`ifdef OR1200_MONITOR_VERBOSE_NOPS
375 468 julius 
           $display("exit(%h)",r3);
376 456 julius 
`endif
377 6 julius 
           $finish;
378 
        end
379 348 julius 
        // debug if test (l.nop 10)
380 
        if (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn == 32'h1500_000a) begin
381 6 julius 
           $fdisplay(fgeneral, "%t: l.nop dbg_if_test", $time);
382 
        end
383 348 julius 
        // simulation reports (l.nop 2)
384 
        if (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn == 32'h1500_0002) begin
385 6 julius 
           get_gpr(3, r3);
386 468 julius 
           $fdisplay(fgeneral, "%t: l.nop report (0x%h)", $time, r3);
387 456 julius 
`ifdef OR1200_MONITOR_VERBOSE_NOPS
388 468 julius 
           $display("report (0x%h);", r3);
389 456 julius 
`endif
390 348 julius 
        end
391 
        // simulation printfs (l.nop 3)
392 
        if (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn == 32'h1500_0003) begin
393 
           get_gpr(3, r3);
394 6 julius 
           $fdisplay(fgeneral, "%t: l.nop printf (%h)", $time, r3);
395 
        end
396 348 julius 
        if (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn == 32'h1500_0004) begin
397 
           // simulation putc (l.nop 4)
398 
           get_gpr(3, r3);
399 
           $write("%c", r3);
400 
           $fdisplay(fgeneral, "%t: l.nop putc (%c)", $time, r3);
401 
        end
402 397 julius 
`ifdef OR1200_MONITOR_SPRS
403 
        if (`OR1200_TOP.`CPU_cpu.`CPU_sprs.spr_we)
404 6 julius 
          $fdisplay(fspr, "%t: Write to SPR : [%h] <- %h", $time,
405 397 julius 
                    `OR1200_TOP.`CPU_cpu.`CPU_sprs.spr_addr,
406 348 julius 
                    `OR1200_TOP.`CPU_cpu.`CPU_sprs.spr_dat_o);
407 397 julius 
        if ((|`OR1200_TOP.`CPU_cpu.`CPU_sprs.spr_cs) &
408 
            !`OR1200_TOP.`CPU_cpu.`CPU_sprs.spr_we)
409 6 julius 
          $fdisplay(fspr, "%t: Read from SPR: [%h] -> %h", $time,
410 348 julius 
                    `OR1200_TOP.`CPU_cpu.`CPU_sprs.spr_addr,
411 
                    `OR1200_TOP.`CPU_cpu.`CPU_sprs.to_wbmux);
412 397 julius 
`endif
413 6 julius 
     end
414 
 
415 348 julius 
 
416 415 julius 
`ifdef RAM_WB
417 439 julius 
 `define RAM_WB_TOP `DUT_TOP.ram_wb0.ram_wb_b3_0
418 415 julius 
   task get_insn_from_wb_ram;
419 
      input [31:0] addr;
420 
      output [31:0] insn;
421 
      begin
422 477 julius 
         insn = `RAM_WB_TOP.get_mem32(addr[31:2]);
423 415 julius 
      end
424 
   endtask // get_insn_from_wb_ram
425 
`endif
426 
 
427 348 julius 
`ifdef VERSATILE_SDRAM
428 415 julius 
 `define SDRAM_TOP `TB_TOP.sdram0
429 348 julius 
   // Bit selects to define the bank
430 
   // 32 MB part with 4 banks
431 
 `define SDRAM_BANK_SEL_BITS 24:23
432 
 `define SDRAM_WORD_SEL_TOP_BIT 22
433 
   // Gets instruction word from correct bank
434 
   task get_insn_from_sdram;
435 
      input [31:0] addr;
436 
      output [31:0] insn;
437 
      reg [`SDRAM_WORD_SEL_TOP_BIT-1:0] word_addr;
438 449 julius 
 
439 348 julius 
      begin
440 
         word_addr = addr[`SDRAM_WORD_SEL_TOP_BIT:2];
441 
         if (addr[`SDRAM_BANK_SEL_BITS] == 2'b00)
442 
           begin
443 
 
444 
              //$display("%t: get_insn_from_sdram bank0, word 0x%h, (%h and %h in SDRAM)", $time, word_addr, `SDRAM_TOP.Bank0[{word_addr,1'b0}], `SDRAM_TOP.Bank0[{word_addr,1'b1}]);
445 
              insn[15:0] = `SDRAM_TOP.Bank0[{word_addr,1'b1}];
446 
              insn[31:16] = `SDRAM_TOP.Bank0[{word_addr,1'b0}];
447 
           end
448 
      end
449 
 
450 
   endtask // get_insn_from_sdram
451 
`endif //  `ifdef VERSATILE_SDRAM
452 
 
453 
`ifdef XILINX_DDR2
454 415 julius 
 `define DDR2_TOP `TB_TOP.gen_cs[0]
455 348 julius 
   // Gets instruction word from correct bank
456 
   task get_insn_from_xilinx_ddr2;
457 
      input [31:0] addr;
458 
      output [31:0] insn;
459 415 julius 
      reg [16*8-1:0] ddr2_array_line0,ddr2_array_line1,ddr2_array_line2,
460 
                     ddr2_array_line3;
461 348 julius 
      integer        word_in_line_num;
462 
      begin
463 449 julius 
         // Get our 4 128-bit chunks (8 half-words in each!! Confused yet?),
464 
         // 16 words total
465 348 julius 
         `DDR2_TOP.gen[0].u_mem0.memory_read(addr[28:27],addr[26:13],{addr[12:6],3'd0},ddr2_array_line0);
466 
         `DDR2_TOP.gen[1].u_mem0.memory_read(addr[28:27],addr[26:13],{addr[12:6],3'd0},ddr2_array_line1);
467 
         `DDR2_TOP.gen[2].u_mem0.memory_read(addr[28:27],addr[26:13],{addr[12:6],3'd0},ddr2_array_line2);
468 
         `DDR2_TOP.gen[3].u_mem0.memory_read(addr[28:27],addr[26:13],{addr[12:6],3'd0},ddr2_array_line3);
469 
         case (addr[5:2])
470 
           4'h0:
471 
             begin
472 
                insn[15:0] = ddr2_array_line0[15:0];
473 
                insn[31:16] = ddr2_array_line1[15:0];
474 
             end
475 
           4'h1:
476 
             begin
477 
                insn[15:0] = ddr2_array_line2[15:0];
478 
                insn[31:16] = ddr2_array_line3[15:0];
479 
             end
480 
           4'h2:
481 
             begin
482 
                insn[15:0] = ddr2_array_line0[31:16];
483 
                insn[31:16] = ddr2_array_line1[31:16];
484 
             end
485 
           4'h3:
486 
             begin
487 
                insn[15:0] = ddr2_array_line2[31:16];
488 
                insn[31:16] = ddr2_array_line3[31:16];
489 
             end
490 
           4'h4:
491 
             begin
492 
                insn[15:0] = ddr2_array_line0[47:32];
493 
                insn[31:16] = ddr2_array_line1[47:32];
494 
             end
495 
           4'h5:
496 
             begin
497 
                insn[15:0] = ddr2_array_line2[47:32];
498 
                insn[31:16] = ddr2_array_line3[47:32];
499 
             end
500 
           4'h6:
501 
             begin
502 
                insn[15:0] = ddr2_array_line0[63:48];
503 
                insn[31:16] = ddr2_array_line1[63:48];
504 
             end
505 
           4'h7:
506 
             begin
507 
                insn[15:0] = ddr2_array_line2[63:48];
508 
                insn[31:16] = ddr2_array_line3[63:48];
509 
             end
510 
           4'h8:
511 
             begin
512 
                insn[15:0] = ddr2_array_line0[79:64];
513 
                insn[31:16] = ddr2_array_line1[79:64];
514 
             end
515 
           4'h9:
516 
             begin
517 
                insn[15:0] = ddr2_array_line2[79:64];
518 
                insn[31:16] = ddr2_array_line3[79:64];
519 
             end
520 
           4'ha:
521 
             begin
522 
                insn[15:0] = ddr2_array_line0[95:80];
523 
                insn[31:16] = ddr2_array_line1[95:80];
524 
             end
525 
           4'hb:
526 
             begin
527 
                insn[15:0] = ddr2_array_line2[95:80];
528 
                insn[31:16] = ddr2_array_line3[95:80];
529 
             end
530 
           4'hc:
531 
             begin
532 
                insn[15:0] = ddr2_array_line0[111:96];
533 
                insn[31:16] = ddr2_array_line1[111:96];
534 
             end
535 
           4'hd:
536 
             begin
537 
                insn[15:0] = ddr2_array_line2[111:96];
538 
                insn[31:16] = ddr2_array_line3[111:96];
539 
             end
540 
           4'he:
541 
             begin
542 
                insn[15:0] = ddr2_array_line0[127:112];
543 
                insn[31:16] = ddr2_array_line1[127:112];
544 
             end
545 
           4'hf:
546 
             begin
547 
                insn[15:0] = ddr2_array_line2[127:112];
548 
                insn[31:16] = ddr2_array_line3[127:112];
549 
             end
550 
         endcase // case (addr[5:2])
551 
      end
552 
   endtask // get_insn_from_xilinx_ddr2
553 
`endif
554 
 
555 
 
556 
   task get_insn_from_memory;
557 
      input [31:0] id_pc;
558 
      output [31:0] insn;
559 
      begin
560 
         // do a decode of which server we should look in
561 
         case (id_pc[31:28])
562 
`ifdef VERSATILE_SDRAM
563 
           4'h0:
564 
             get_insn_from_sdram(id_pc, insn);
565 
`endif
566 
`ifdef XILINX_DDR2
567 
           4'h0:
568 
             get_insn_from_xilinx_ddr2(id_pc, insn);
569 415 julius 
`endif
570 
`ifdef RAM_WB
571 
           4'h0:
572 
             get_insn_from_wb_ram(id_pc, insn);
573 
`endif
574 348 julius 
           4'hf:
575 
             // Flash isn't stored in a memory, it's an FSM so just skip/ignore
576 
             insn = `OR1200_TOP.`CPU_cpu.`CPU_ctrl.id_insn;
577 
           default:
578 
             begin
579 
                $fdisplay(fgeneral, "%t: Unknown memory server for address 0x%h", $time,id_pc);
580 
                insn = 32'hxxxxxxxx; // Unknown server
581 
             end
582 
         endcase // case (id_pc[31:28])
583 
      end
584 
   endtask // get_insn_from_memory
585 
 
586 
 
587 449 julius 
   //
588 
   // Look in the iMMU TLB MR for this address' page, if MMUs are on and enabled
589 
   //
590 
   task check_for_immu_entry;
591 
      input [31:0] pc;
592 
      output [31:0] physical_pc;
593 
      output        mmu_tlb_miss;
594 
      integer       w,x;
595 
 
596 
      reg [31:`OR1200_IMMU_PS] pc_vpn;
597 
 
598 
      reg [`OR1200_ITLBTRW-1:0] itlb_tr;
599 
      reg [`OR1200_ITLBMRW-1:0] itlb_mr;
600 
 
601 
      integer                   tlb_index;
602 
      reg                       mmu_en;
603 
 
604 
 
605 
      begin
606 
         mmu_tlb_miss = 0;
607 
 
608 
`ifdef OR1200_NO_IMMU
609 
         physical_pc = pc;
610 
`else
611 
         mmu_en = `OR1200_TOP.`CPU_immu_top.immu_en;
612 
         // If MMU is enabled
613 
         if (mmu_en)
614 
           begin
615 
 
616 
              // Look in the iTLB for mapping - get virtual page number
617 
              pc_vpn = pc[31:`OR1200_IMMU_PS];
618 
 
619 
              tlb_index = pc[`OR1200_ITLB_INDX];
620 
 
621 
              // Look at the ITLB match register
622 
              itlb_mr = `OR1200_TOP.`CPU_immu_top.`CPU_immu_tlb.itlb_mr_ram.mem[tlb_index];
623 
 
624 
              // Get the translate register here too, in case there's an error, we print it
625 
              itlb_tr = `OR1200_TOP.`CPU_immu_top.`CPU_immu_tlb.itlb_tr_ram.mem[tlb_index];
626 
 
627 
              if ((itlb_mr[`OR1200_ITLBMR_V_BITS] === 1'b1) & (itlb_mr[`OR1200_ITLBMRW-1:1] === pc[`OR1200_ITLB_TAG]))
628 
                begin
629 
                   // Page number in match register matches page number of virtual PC, so get the physical
630 
                   // address from the translate memory
631 
                   // Now pull the physical page number out of the tranlsate register (it's after bottom 3 bits)
632 
                   physical_pc = {itlb_tr[`OR1200_ITLBTRW-1:`OR1200_ITLBTRW-(32-`OR1200_IMMU_PS)],pc[`OR1200_IMMU_PS-1:0]};
633 
                   //$display("check_for_immu_entry: found match for virtual PC 0x%h in entry %d of iMMU, mr = 0x%x tr = 0x%x, phys. PC = 0x%h", pc, pc[`OR1200_ITLB_INDX], itlb_mr, itlb_tr, physical_pc);
634 
                end // if ((itlb_mr[`OR1200_ITLBMR_V_BITS]) & (itlb_mr[`OR1200_ITLBMRW-1:1] == pc[`OR1200_ITLB_TAG]))
635 
              else
636 
                begin
637 
 
638 
                   // Wait a couple of clocks, see if we're doing a miss
639 
                   @(posedge `CPU_CORE_CLK);
640 
                   @(posedge `CPU_CORE_CLK);
641 
                   if (!(`OR1200_TOP.`CPU_immu_top.miss)) // MMU should indicate miss
642 
                     begin
643 
                        $display("%t: check_for_immu_entry - ERROR - no match found for virtual PC 0x%h in entry %d of iMMU, mr = 0x%x tr = 0x%x, and no miss generated",
644 
                                 $time, pc, pc[`OR1200_ITLB_INDX], itlb_mr, itlb_tr);
645 
                        #100;
646 
                        $finish;
647 
                     end
648 
                   else
649 
                     begin
650 
                        mmu_tlb_miss = 1; // Started a miss, so ignore this instruction
651 
                     end
652 
                end // else: !if((itlb_mr[`OR1200_ITLBMR_V_BITS]) & (itlb_mr[`OR1200_ITLBMRW-1:1] == pc[`OR1200_ITLB_TAG]))
653 
 
654 
           end // if (`OR1200_TOP.`CPU_immu_top.immu_en === 1'b1)
655 
         else
656 
           physical_pc = pc;
657 
`endif // !`ifdef OR1200_NO_IMMU
658 
      end
659 
   endtask // check_for_immu_entry
660 
 
661 
 
662 
   /*
663 
    Instruction memory coherence checking.
664 
 
665 
    For new instruction executed in the pipeline - ensure it matches
666 
    what is in the main program memory. Perform MMU translations if
667 
    it is enabled.
668 
    */
669 
 
670 
   reg [31:0] mem_word;
671 348 julius 
   reg [31:0] last_addr = 0;
672 
   reg [31:0] last_mem_word;
673 449 julius 
   reg [31:0] physical_pc;
674 
   reg        tlb_miss;
675 
 
676 348 julius 
 
677 415 julius 
`ifdef MEM_COHERENCE_CHECK
678 
 `define MEM_COHERENCE_TRIGGER (`OR1200_TOP.`CPU_cpu.`CPU_ctrl.id_void === 1'b0)
679 
 
680 449 julius 
 `define INSN_TO_CHECK `OR1200_TOP.`CPU_cpu.`CPU_ctrl.id_insn
681 
 `define PC_TO_CHECK `OR1200_TOP.`CPU_cpu.`CPU_except.id_pc
682 348 julius 
 
683 
   // Check instruction in decode stage is what is in the RAM
684 449 julius 
   always @(posedge `CPU_CORE_CLK)
685 348 julius 
     begin
686 415 julius 
        if (`MEM_COHERENCE_TRIGGER)
687 348 julius 
          begin
688 449 julius 
 
689 
             check_for_immu_entry(`PC_TO_CHECK, physical_pc, tlb_miss);
690 
 
691 348 julius 
             // Check if it's a new PC - will also get triggered if the
692 
             // instruction has changed since we last checked it
693 477 julius 
             if (((physical_pc !== last_addr) ||
694 
                  (last_mem_word != `INSN_TO_CHECK)) & !tlb_miss)
695 348 julius 
               begin
696 
                  // Decode stage not void, check instruction
697 
                  // get PC
698 449 julius 
                  get_insn_from_memory(physical_pc, mem_word);
699 348 julius 
 
700 
                  if (mem_word !== `INSN_TO_CHECK)
701 
                    begin
702 477 julius 
                       $fdisplay(fgeneral, "%t: Instruction mismatch for PC 0x%h (phys. 0x%h) - memory had 0x%h, CPU had 0x%h",
703 
                                 $time, `PC_TO_CHECK, physical_pc, mem_word,
704 
                                 `INSN_TO_CHECK);
705 
                       $display("%t: Instruction mismatch for PC 0x%h (phys. 0x%h) - memory had 0x%h, CPU had 0x%h",
706 
                                $time, `PC_TO_CHECK, physical_pc, mem_word,
707 
                                `INSN_TO_CHECK);
708 
                       #200;
709 
                       $finish;
710 348 julius 
                    end
711 449 julius 
                  last_addr = physical_pc;
712 
                  last_mem_word = mem_word;
713 
 
714 
               end // if (((physical_pc !== last_addr) || (last_mem_word != `INSN_TO_CHECK))...
715 
          end // if (`MEM_COHERENCE_TRIGGER)
716 
     end // always @ (posedge `CPU_CORE_CLK)
717 
 
718 
`endif //  `ifdef MEM_COHERENCE_CHECK
719 
 
720 
   // Trigger on each instruction that gets into writeback stage properly
721 
   reg exception_coming1, exception_coming2, exception_here;
722 
   reg will_jump, jumping, jump_dslot, jumped;
723 
   reg rfe, except_during_rfe;
724 
   reg dslot_expt;
725 
 
726 
 
727 
   // Maintain a copy of GPRS for previous instruction
728 
   reg [31:0] current_gprs [0:31];
729 
   reg [31:0] current_epcr, current_eear, current_esr, current_sr;
730 
   reg [31:0] previous_gprs [0:31];
731 
   reg [31:0] previous_epcr;
732 
   reg [31:0] previous_eear;
733 
   reg [31:0] previous_esr;
734 
   reg [31:0] previous_sr;
735 
 
736 
   task update_current_gprs;
737 
      integer j;
738 
      begin
739 
         for(j=0;j<32;j=j+1)
740 
           begin
741 
              get_gpr(j,current_gprs[j]);
742 
           end
743 491 julius 
         current_sr = `OR1200_TOP.`CPU_cpu.`CPU_sprs.sr ;
744 
         current_esr = `OR1200_TOP.`CPU_cpu.`CPU_sprs.epcr ;
745 
         current_epcr = `OR1200_TOP.`CPU_cpu.`CPU_sprs.epcr ;
746 
         current_eear = `OR1200_TOP.`CPU_cpu.`CPU_sprs.eear ;
747 449 julius 
      end
748 
   endtask
749 
 
750 
   task update_previous_gprs;
751 
      integer j;
752 
      begin
753 
         for(j=0;j<32;j=j+1)
754 
           begin
755 
              previous_gprs[j] = current_gprs[j];
756 
           end
757 
         previous_sr = current_sr;
758 
         previous_esr = current_esr;
759 
         previous_epcr = current_epcr;
760 
         previous_eear = current_eear;
761 
      end
762 
   endtask // update_previous_gprs
763 
 
764 
   // Maintain a list of addresses we expect the processor to execute
765 
   // Whenever we hit a branch or jump or rfe we add to this list - when we
766 
   // execute it then we remove it from the list.
767 
   reg [31:0] expected_addresses [0:31];
768 
   reg        expected_addresses_waiting [0:31]; // List indicating if address is waiting
769 
   reg        duplicate_expected_addresses_waiting [0:31]; // List indicating if a waiting address will be cleared by the single return
770 
   integer    expected_address_num;
771 
   // Initialise things on reset
772 
   always @(`OR1200_TOP.iwb_rst_i)
773 
     begin
774 
        for (expected_address_num=0;expected_address_num<32;expected_address_num=expected_address_num+1)
775 
          begin
776 
             expected_addresses_waiting[expected_address_num] = 0;
777 
             duplicate_expected_addresses_waiting[expected_address_num] = 0;
778 348 julius 
          end
779 449 julius 
        expected_address_num = 0;
780 
     end
781 
 
782 
   task add_expected_address;
783 
      input [31:0] expected_pc;
784 
      begin
785 
         if (expected_address_num == 31)
786 
           begin
787 
              $display("%t: Too many branches not reached",$time);
788 
              #100;
789 
              $finish;
790 
           end
791 
         if (expected_addresses_waiting[expected_address_num])
792 
           begin
793 
              $display("%t: expected_addresses tracker bugged out. expected_address_num = %0d",$time,expected_address_num);
794 
              #100;
795 
              $finish;
796 
           end
797 
         else
798 
           begin
799 
`ifdef OR1200_MONITOR_JUMPTRACK_DEBUG_OUTPUT
800 
              // Debugging output...
801 
              $display("%t: Adding address 0x%h to expected list index %0d",$time, expected_pc,expected_address_num);
802 
`endif
803 
              // Put the expected PC in the list, increase the index
804 
              expected_addresses[expected_address_num] = expected_pc;
805 
              expected_addresses_waiting[expected_address_num] = 1;
806 
              expected_address_num = expected_address_num + 1;
807 
           end // else: !if(expected_addresses_waiting[expected_address_num])
808 
      end
809 
   endtask // add_address_to_expect
810 
 
811 
   // Use this in the case that there's an execption after a jump, in which
812 
   // case we'll have two entries when we finally jump back (the one the
813 
   // original jump put in, and the one put in by the l.rfe or l.jr/ when
814 
   // returning outside of exception handler), so mark this one as OK for
815 
   // removing the duplicate of
816 
   task mark_duplicate_expected_address;
817 
      begin
818 
         // This will always be done on the first instruction of an exception
819 
         // that has occured after a delay slot instruction, so
820 
         // expected_address_num will be one past the entry for the one we will
821 
         // get a duplicate return call for
822 
         duplicate_expected_addresses_waiting[expected_address_num-1] = 1;
823 
      end
824 
   endtask // mark_duplicate_expected_address
825 
 
826 
 
827 
   task check_expected_address;
828 
      input [31:0] pc;
829 
      input        expecting_hit;
830 
      integer      i,j;
831 
      reg          hit;
832 
      reg          duplicates;
833 348 julius 
 
834 449 julius 
      begin
835 
         hit = 0;
836 
         //$display("%t: check_expected_addr 0x%h, index %0d",
837 
         // $time,pc, expected_address_num);
838 
         if (expected_address_num > 0)
839 
           begin
840 
              // First check the last jump we did
841 
              if (expected_addresses[expected_address_num-1] == pc)
842 
                begin
843 
                   // Jump address hit
844 
                   // Debugging printout:
845 
`ifdef OR1200_MONITOR_JUMPTRACK_DEBUG_OUTPUT
846 
                   $display("%t: PC address 0x%h was in expected list, index %0d",$time, pc,expected_address_num-1);
847 
`endif
848 
                   expected_address_num = expected_address_num-1;
849 
                   expected_addresses_waiting[expected_address_num] = 0;
850 
                   hit = 1;
851 
                end
852 
              else
853 
                begin
854 
                   // Check through the list
855 
                   for(i=0;i<expected_address_num;i=i+1)
856 
                     begin
857 
                        if (expected_addresses[i] == pc)
858 
                          begin
859 
                             // Jump address hit
860 
                             // Debugging printout:
861 
`ifdef OR1200_MONITOR_JUMPTRACK_DEBUG_OUTPUT
862 
                             $display("%t: PC address 0x%h was in expected list, index %0d",$time, pc,i);
863 
`endif
864 
                             for(j=i;j<expected_address_num;j=j+1)
865 
                               begin
866 
                                  // Pull all of the ones above us down one
867 
                                  expected_addresses_waiting[j]
868 
                                    = expected_addresses_waiting[j+1];
869 
                                  expected_addresses[j]
870 
                                    = expected_addresses[j+1];
871 
                                  duplicate_expected_addresses_waiting[j]
872 
                                    = duplicate_expected_addresses_waiting[j+1];
873 
                               end
874 
                             expected_address_num = expected_address_num-1;
875 
                             hit = 1;
876 
                             // quit out. only allow 1 hit
877 
                             i = expected_address_num;
878 
                          end
879 
                     end
880 
                end // else: !if(expected_addresses[expected_ad...
881 
           end // if (expected_address_num > 0)
882 348 julius 
 
883 449 julius 
         // Check for duplicates this way because of the way we've declared
884 
         // the array...
885 
         duplicates=0;
886 
         for(i=0;i<32;i=i+1)
887 
           duplicates = duplicates | duplicate_expected_addresses_waiting[i];
888 
 
889 
         if (hit & duplicates)
890 
           begin
891 
              // If we got a hit, check for duplicates we're also meant to clear
892 
`ifdef OR1200_MONITOR_JUMPTRACK_DEBUG_OUTPUT
893 
              $display;
894 
`endif
895 
              for(i=0;i<expected_address_num;i=i+1)
896 
                begin
897 
                   if(duplicate_expected_addresses_waiting[i] &
898 
                      expected_addresses_waiting[i] &
899 
                      expected_addresses[i] == pc)
900 
                     begin
901 
                        // Found a duplicate call address, clear it
902 
                        duplicate_expected_addresses_waiting[i] = 0;
903 
                        expected_addresses_waiting[i] = 0;
904 
 
905 
                        // Now reorder the list - pull all the ones above us
906 
                        // down by one
907 
                        for(j=i;j<expected_address_num;j=j+1)
908 
                          begin
909 
                             expected_addresses_waiting[j] = expected_addresses_waiting[j+1];
910 
                             expected_addresses[j] = expected_addresses[j+1];
911 
                             duplicate_expected_addresses_waiting[j] = duplicate_expected_addresses_waiting[j+1];
912 
                          end
913 
                        expected_address_num = expected_address_num - 1;
914 
                     end
915 
                end // for (i=0;i<expected_address_num;i=i+1)
916 
           end // if (hit & duplicates)
917 
 
918 
         if (expecting_hit & !hit)
919 
           begin
920 
              // Expected this address to be one we're supposed to jump to, but it wasn't!
921 
              $display("%t: Failed to find current PC, 0x%h, in expected PCs for branches/jumps",$time,pc);
922 
              #100;
923 
              $finish;
924 
           end
925 
 
926 
      end
927 
   endtask // check_expected_address
928 
 
929 
   // Task to assert value of GPR
930 
   task assert_gpr_val;
931 
      input [5:0] regnum;
932 
      input [31:0] assert_value;
933 
      input [31:0] pc;
934 
      reg [31:0]   reg_val;
935 
 
936 
      begin
937 
         get_gpr(regnum, reg_val);
938 
         if (reg_val !== assert_value)
939 
           begin
940 
              $display("%t: Assert r%0d value (0x%h) = 0x%h failed. pc=0x%h",
941 
                       $time, regnum, reg_val, assert_value,pc);
942 
              #100;
943 
              $finish;
944 
           end
945 
      end
946 
   endtask // assert_gpr_val
947 
 
948 
   // Task to assert something is true
949 
   task assert_this;
950 
      input assert_result;
951 
      input [31:0] pc;
952 
      begin
953 
         if (!assert_result)
954 
           begin
955 
              $display("%t: Assert failed for instruction at pc=0x%h",
956 
                       $time , pc);
957 
              #100;
958 
              $finish;
959 
           end
960 
      end
961 
   endtask // assert_gpr_val
962 
 
963 
   // The jumping variable doesn't get updated until we do the proper check of
964 
   // the current instruction reaching the writeback stage. We need to know
965 
   // earlier, eg. in the exception checking part, if this instruction will
966 
   // jump. We do that with this task.
967 
   task check_for_jump;
968 
      input [31:0] insn;
969 
      reg [5:0]    opcode;
970 
      reg          flag;
971 
      begin
972 
         opcode = insn[`OR1K_OPCODE_POS];
973 
         // Use the flag from the previous instruction, as the decision
974 
         // is made in the execute stage not in te writeback stage,
975 
         // which is where we're getting our instructions.
976 
         flag = previous_sr[`OR1200_SR_F];
977 
 
978 
         case (opcode)
979 
           `OR1200_OR32_J,
980 
             `OR1200_OR32_JR,
981 
             `OR1200_OR32_JAL,
982 
             `OR1200_OR32_JALR:
983 
               will_jump = 1;
984 
           `OR1200_OR32_BNF:
985 
             will_jump = !flag;
986 
           `OR1200_OR32_BF:
987 
             will_jump = flag;
988 
           default:
989 
             will_jump = 0;
990 
         endcase // case (opcode)
991 
      end
992 
   endtask // check_for_jump
993 
 
994 
 
995 
 
996 
   // Detect exceptions from the processor here
997 
   reg [13:0] except_trig_r;
998 
   reg        exception_coming;
999 
 
1000 
   always @(posedge `CPU_CORE_CLK)
1001 
     if (`OR1200_TOP.iwb_rst_i)
1002 
       begin
1003 
          except_trig_r = 0;
1004 
          exception_coming = 0;
1005 
          except_during_rfe = 0;
1006 
       end
1007 
     else if ((|`OR1200_TOP.`CPU_cpu.`CPU_except.except_trig) && !exception_coming)
1008 
       begin
1009 
          exception_coming  = 1;
1010 
          except_trig_r = `OR1200_TOP.`CPU_cpu.`CPU_except.except_trig;
1011 
          except_during_rfe = rfe;
1012 
       end
1013 
 
1014 
   task check_incoming_exceptions;
1015 
      begin
1016 
 
1017 
         // Exception timing  - depends on the trigger.
1018 
         // Appears to be:
1019 
         // tick timer - dslot - 1 instruction delay, else 2
1020 
         // tlb lookasides - 1 instruction for both
1021 
 
1022 
         casex (except_trig_r)
1023 
           13'b1_xxxx_xxxx_xxxx: begin
1024 
              //except_type <= #1 `OR1200_EXCEPT_TICK;
1025 
              exception_here = exception_coming2;
1026 
              exception_coming2 = jump_dslot ? exception_coming: exception_coming1 ;
1027 
              exception_coming1 = jump_dslot ? 0 : exception_coming;
1028 
           end
1029 
           13'b0_1xxx_xxxx_xxxx: begin
1030 
              //except_type <= #1 `OR1200_EXCEPT_INT;
1031 
              #1;
1032 
           end
1033 
           13'b0_01xx_xxxx_xxxx: begin
1034 
              //except_type <= #1 `OR1200_EXCEPT_ITLBMISS;
1035 
              exception_here = exception_coming2;
1036 
              exception_coming2 = jump_dslot ? exception_coming : exception_coming1 ;
1037 
              exception_coming1 = jump_dslot ? 0 : exception_coming;
1038 
           end
1039 
           13'b0_001x_xxxx_xxxx: begin
1040 
              //except_type <= #1 `OR1200_EXCEPT_IPF;
1041 
              exception_here = exception_coming2;
1042 
              exception_coming2 = jump_dslot ? exception_coming : exception_coming1 ;
1043 
              exception_coming1 = jump_dslot ? 0 : exception_coming;
1044 
           end
1045 
           13'b0_0001_xxxx_xxxx: begin
1046 
              //except_type <= #1 `OR1200_EXCEPT_BUSERR;
1047 
              exception_here = exception_coming;
1048 
              exception_coming2 = 0;
1049 
              exception_coming1 = 0;
1050 
           end
1051 
           13'b0_0000_1xxx_xxxx: begin
1052 
              //except_type <= #1 `OR1200_EXCEPT_ILLEGAL;
1053 
              if (will_jump)
1054 
                begin
1055 
                   // Writeback stage instruction will jump, and we have an
1056 
                   // illegal instruction in the decode/execute stage, which is
1057 
                   // the delay slot, so indicate the exception is coming...
1058 
                   exception_here = exception_coming2;
1059 
                   exception_coming2 = exception_coming;
1060 
                   exception_coming1 = 0;
1061 
                end
1062 
              else
1063 
                begin
1064 
                   exception_here = jump_dslot ?
1065 
                                    exception_coming2 : exception_coming;
1066 
                   exception_coming2 = jump_dslot ? exception_coming : 0;
1067 
                   exception_coming1 = 0;
1068 
                end
1069 
           end
1070 
           13'b0_0000_01xx_xxxx: begin
1071 
              //except_type <= #1 `OR1200_EXCEPT_ALIGN;
1072 
              if(will_jump)
1073 
                begin
1074 
                   exception_here = exception_coming2;
1075 
                   exception_coming2 = exception_coming;
1076 
                   exception_coming1 = 0;
1077 
                end
1078 
              else
1079 
                begin
1080 
                   exception_here =  (rfe) ? exception_coming : exception_coming2;
1081 
                   exception_coming2 = (rfe) ? 0 : exception_coming;
1082 
                   exception_coming1 = 0;
1083 
                end
1084 
           end
1085 
           13'b0_0000_001x_xxxx: begin
1086 
              //except_type <= #1 `OR1200_EXCEPT_DTLBMISS;
1087 
              // Looks like except_trig goes high here after we check the
1088 
              // instruction before the itlb miss after a delay slot, so we
1089 
              // miss the dslot variable (it gets propegated before we call
1090 
              // this task) so we use the jumped variable here to see if we
1091 
              // are an exception after a delay slot
1092 
              //exception_here = (jumped | rfe) ? exception_coming : exception_coming2 ;
1093 
              //exception_coming2 = (jumped | rfe) ? 0 : exception_coming;
1094 
 
1095 
              exception_here = (jumped | rfe) ? exception_coming : exception_coming2 ;
1096 
              exception_coming2 = (jumped | rfe) ? 0 : exception_coming;
1097 
 
1098 
              exception_coming1 = 0;
1099 
           end
1100 
           13'b0_0000_0001_xxxx: begin
1101 
              //except_type <= #1 `OR1200_EXCEPT_DPF;
1102 
              if (jumped) begin // Jumped onto illegal instruction
1103 
                 exception_here = exception_coming ;
1104 
                 exception_coming2 = 0;
1105 
                 exception_coming1 = 0;
1106 
              end
1107 
              else begin
1108 
                 exception_here =  exception_coming2;
1109 
                 exception_coming2 = exception_coming;
1110 
                 exception_coming1 = 0;
1111 
              end
1112 
           end
1113 
           13'b0_0000_0000_1xxx: begin  // Data Bus Error
1114 
              //except_type <= #1 `OR1200_EXCEPT_BUSERR;
1115 
              exception_here = exception_coming2 ;
1116 
              exception_coming2 = exception_coming;
1117 
              exception_coming1 = 0;
1118 
           end
1119 
           13'b0_0000_0000_01xx: begin
1120 
              //except_type <= #1 `OR1200_EXCEPT_RANGE;
1121 
              #1;
1122 
           end
1123 
           13'b0_0000_0000_001x: begin
1124 
              // trap
1125 
              #1;
1126 
           end
1127 
           13'b0_0000_0000_0001: begin
1128 
              //except_type <= #1 `OR1200_EXCEPT_SYSCALL;
1129 
              exception_here = exception_coming2;
1130 
              exception_coming2 = jumped ? exception_coming: exception_coming1 ;
1131 
              exception_coming1 = jumped ? 0 : exception_coming;
1132 
           end
1133 
         endcase // casex (except_trig_r)
1134 
 
1135 
         exception_coming = 0;
1136 
         except_during_rfe = 0;
1137 
 
1138 
      end
1139 
   endtask // check_incoming_exceptions
1140 
 
1141 
 
1142 
 
1143 
 
1144 351 julius 
   /////////////////////////////////////////////////////////////////////////
1145 449 julius 
   // Execution tracking task
1146 351 julius 
   /////////////////////////////////////////////////////////////////////////
1147 348 julius 
 
1148 449 julius 
 
1149 
`ifdef OR1200_SYSTEM_CHECKER
1150 
   always @(posedge `CPU_CORE_CLK)
1151 
     begin
1152 
        if (`OR1200_TOP.iwb_rst_i)
1153 
          begin
1154 
             exception_coming1 = 0;exception_coming2 = 0;exception_here= 0;
1155 
             jumping = 0; jump_dslot = 0; jumped = 0;
1156 
             rfe = 0;
1157 
          end
1158 
        if (!`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_freeze) begin
1159 
           //#2 ;
1160 
           // If instruction isn't a l.nop with bit 16 set (implementation's
1161 
           // filler instruction in pipeline), and do not have an exception
1162 
           // signaled with a dslot instruction in the execute stage
1163 
           if (((`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn[`OR1K_OPCODE_POS] !=
1164 
                 `OR1200_OR32_NOP) || !`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn[16])
1165 
               && !(`OR1200_TOP.`CPU_cpu.`CPU_except.except_flushpipe &&
1166 
                    `OR1200_TOP.`CPU_cpu.`CPU_except.ex_dslot)) // and not except start
1167 
             begin
1168 351 julius 
 
1169 449 julius 
                // Propegate jump-tracking variables
1170 
                // If was exception in delay slot, we didn't actually jump
1171 
                // so don't set jumped in this case.
1172 
                jumped = exception_here ? 0 : jump_dslot;
1173 
                jump_dslot = jumping;
1174 
                jumping = 0;
1175 
                rfe = 0;
1176 
 
1177 
                // Now, check if current instruction will jump/branch, this is
1178 
                // needed by the exception checking code, sets will_jump=1
1179 
                check_for_jump(`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn);
1180 
 
1181 
                // Now check if it's an exception this instruction
1182 
                check_incoming_exceptions;
1183 
 
1184 
                // Case where we just went to an exception after a jump, so we
1185 
                // mark the address we were meant to jump to as a place which will
1186 
                // have duplicate return entries in the expected address list
1187 
                if (exception_here & (jumped | jump_dslot))
1188 
                  begin
1189 
                     $display("%t: marked as jump address with exception (dup)"
1190 
                              ,$time);
1191 
                     mark_duplicate_expected_address;
1192 
                  end
1193 
 
1194 
                or1200_check_execution(`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn,
1195 
                                       `OR1200_TOP.`CPU_cpu.`CPU_except.wb_pc,
1196 
                                       exception_here);
1197 
                //$write("%t: pc:0x%h\t",$time,
1198 
                //       `OR1200_TOP.`CPU_cpu.`CPU_except.wb_pc);
1199 
                // Decode the instruction, print it out
1200 
                //or1200_print_op(`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_insn);
1201 
                //$write("\t exc:%0h dsl:%0h\n",exception_here,jump_dslot);
1202 
 
1203 
 
1204 
 
1205 
             end
1206 
        end // if (!`OR1200_TOP.`CPU_cpu.`CPU_ctrl.wb_freeze)
1207 
     end // always @ (posedge `CPU_CORE_CLK)
1208 
`endif
1209 
 
1210 
 
1211 
   task or1200_check_execution;
1212 
      input [31:0] insn;
1213 
      input [31:0] pc;
1214 
      input        exception;
1215 
 
1216 
      reg [5:0]    opcode;
1217 
 
1218 
      reg [25:0]   j_imm;
1219 
      reg [25:0]   br_imm;
1220 
 
1221 
      reg [4:0]    rD_num, rA_num, rB_num;
1222 
      reg [31:0]   rD_val, rA_val, rB_val;
1223 
      reg [15:0]   imm_16bit;
1224 
 
1225 
      reg [15:0]   mtspr_imm;
1226 
 
1227 
      reg [3:0]    alu_op;
1228 
      reg [1:0]    shrot_op;
1229 
 
1230 
      reg [5:0]    shroti_imm;
1231 
 
1232 
      reg [5:0]    sf_op;
1233 
 
1234 
      reg [5:0]    xsync_op;
1235 
 
1236 
      reg          flag;
1237 
 
1238 
      reg [31:0]   br_j_ea; // Branch/jump effective address
1239 
 
1240 
 
1241 
      begin
1242 
 
1243 
         // Instruction opcode
1244 
         opcode = insn[`OR1K_OPCODE_POS];
1245 
         // Immediates for jump or branch instructions
1246 
         j_imm = insn[`OR1K_J_BR_IMM_POS];
1247 
         br_imm = insn[`OR1K_J_BR_IMM_POS];
1248 
         // Register numbers (D, A and B)
1249 
         rD_num = insn[`OR1K_RD_POS];
1250 
         rA_num = insn[`OR1K_RA_POS];
1251 
         rB_num = insn[`OR1K_RB_POS];
1252 
         // Bottom 16 bits when used as immediates in various instructions
1253 
         imm_16bit = insn[15:0];
1254 
         // 16-bit immediate for mtspr instructions
1255 
         mtspr_imm = {insn[25:21],insn[10:0]};
1256 
         // ALU op for ALU instructions
1257 
         alu_op = insn[`OR1K_ALU_OP_POS];
1258 
         // Shift-rotate op for SHROT ALU instructions
1259 
         shrot_op = insn[`OR1K_SHROT_OP_POS];
1260 
         shroti_imm = insn[`OR1K_SHROTI_IMM_POS];
1261 
 
1262 
         // Set flag op
1263 
         sf_op = insn[`OR1K_SF_OP];
1264 
 
1265 
         // Xsync/syscall/trap opcode
1266 
         xsync_op = insn[`OR1K_XSYNC_OP_POS];
1267 
 
1268 
         // Use the flag from the previous instruction, as the decision
1269 
         // is made in the execute stage not in te writeback stage,
1270 
         // which is where we're getting our instructions.
1271 
         flag = previous_sr[`OR1200_SR_F];
1272 
 
1273 
         update_current_gprs;
1274 
 
1275 
         // Check MSbit of the immediate, sign extend if set
1276 
         br_j_ea = j_imm[25] ? pc + {4'hf,j_imm,2'b00} :
1277 
                   pc + {4'h0,j_imm,2'b00};
1278 
 
1279 
         if (exception)
1280 
           begin
1281 
              $display("%t: exception - at 0x%x",$time, pc);
1282 
              // get epcr, put it in the addresses we expect to jump
1283 
              // back to
1284 
              // Maybe DON'T do this. Because maybe in linux things we
1285 
              // interrupt out of, we don't want to execute them again?
1286 
              //add_expected_address(current_epcr);
1287 
           end
1288 
 
1289 
 
1290 
         check_expected_address(pc, (jumped & !exception));
1291 
 
1292 
         rfe = 0;
1293 
 
1294 
         case (opcode)
1295 
           `OR1200_OR32_J:
1296 
             begin
1297 
                //
1298 
                // PC < - exts(Immediate < < 2) + JumpInsnAddr
1299 
                //
1300 
                //The immediate value is shifted left two bits, sign-extended
1301 
                // to program counter width, and then added to the address of
1302 
                // the jump instruction. The result is the effective address
1303 
                // of the jump. The program unconditionally jumps to EA with
1304 
                // a delay of one instruction.
1305 
 
1306 
                add_expected_address(br_j_ea);
1307 
 
1308 
                jumping = 1;
1309 
             end
1310 
           `OR1200_OR32_JAL:
1311 
             begin
1312 
                //
1313 
                //PC < - exts(Immediate < < 2) + JumpInsnAddr
1314 
                //LR < - DelayInsnAddr + 4
1315 
                //
1316 
                // Link reg is r9, check it is PC+8
1317 
                //
1318 
                add_expected_address(br_j_ea);
1319 
                assert_gpr_val(9, pc+8, pc);
1320 
                jumping = 1;    //
1321 
             end
1322 
           `OR1200_OR32_BNF:
1323 
             begin
1324 
                //EA < - exts(Immediate < < 2) + BranchInsnAddr
1325 
                //PC < - EA if SR[F] cleared
1326 
                if (!flag)
1327 
                  begin
1328 
                     add_expected_address(br_j_ea);
1329 
                     jumping = 1;
1330 
                  end
1331 
             end
1332 
           `OR1200_OR32_BF:
1333 
             begin
1334 
                //EA < - exts(Immediate < < 2) + BranchInsnAddr
1335 
                //PC < - EA if SR[F] set
1336 
                if (flag)
1337 
                  begin
1338 
                     add_expected_address(br_j_ea);
1339 
                     jumping = 1;
1340 
                  end
1341 
             end
1342 
           `OR1200_OR32_RFE:
1343 
             begin
1344 
                add_expected_address(current_epcr);
1345 
                // jumping variable keeps track of jumps/branches with delay
1346 
                // slot - there is none for l.rfe
1347 
                rfe = 1;
1348 
             end
1349 
           `OR1200_OR32_JR:
1350 
             begin
1351 
                //PC < - rB
1352 
                get_gpr(rB_num, rB_val);
1353 
                add_expected_address(rB_val);
1354 
                jumping = 1;
1355 
             end
1356 
           `OR1200_OR32_JALR:
1357 
             begin
1358 
                //PC < - rB
1359 
                //LR < - DelayInsnAddr + 4
1360 
                get_gpr(rB_num, rB_val);
1361 
                add_expected_address(rB_val);
1362 
                assert_gpr_val(9, pc+8, pc);
1363 
                jumping = 1;
1364 
             end
1365 
           /*
1366 
            `OR1200_OR32_LWZ,
1367 
            `OR1200_OR32_LBZ,
1368 
            `OR1200_OR32_LBS,
1369 
            `OR1200_OR32_LHZ,
1370 
            `OR1200_OR32_LHS,
1371 
            `OR1200_OR32_SW,
1372 
            `OR1200_OR32_SB,
1373 
            `OR1200_OR32_SH:
1374 
            begin
1375 
            // Should result in databus access if data cache disabled
1376 
            $display("%t: lsu instruction",$time);
1377 
end
1378 
 
1379 
            `OR1200_OR32_MFSPR,
1380 
            `OR1200_OR32_MTSPR:
1381 
            begin
1382 
            // Confirm RF values end up in the correct SPR
1383 
            $display("%t: mxspr",$time);
1384 
end
1385 
 
1386 
            `OR1200_OR32_MOVHI,
1387 
            `OR1200_OR32_ADDI,
1388 
            `OR1200_OR32_ADDIC,
1389 
            `OR1200_OR32_ANDI,
1390 
            `OR1200_OR32_ORI,
1391 
            `OR1200_OR32_XORI,
1392 
            `OR1200_OR32_MULI,
1393 
            `OR1200_OR32_ALU:
1394 
            begin
1395 
            // Double check operations done on RF and immediate values
1396 
            $display("%t: ALU op",$time);
1397 
end
1398 
 
1399 
            `OR1200_OR32_SH_ROTI:
1400 
            begin
1401 
            // Rotate according to immediate - maybe should be in ALU ops
1402 
            $display("%t: rotate op",$time);
1403 
end
1404 
 
1405 
            `OR1200_OR32_SFXXI,
1406 
            `OR1200_OR32_SFXX:
1407 
            begin
1408 
            // Set flag - do the check oursevles, check flag
1409 
            $display("%t: set flag op",$time);
1410 
end
1411 
 
1412 
            `OR1200_OR32_MACI,
1413 
            `OR1200_OR32_MACMSB:
1414 
            begin
1415 
            // Either, multiply signed and accumulate, l.mac
1416 
            // or multiply signed and subtract, l.msb
1417 
            $display("%t: MAC op",$time);
1418 
end
1419 
            */
1420 
 
1421 
           /*default:
1422 
            begin
1423 
            $display("%t: Unknown opcode 0x%h at pc 0x%x\n",
1424 
            $time,opcode, pc);
1425 
end
1426 
            */
1427 
         endcase // case (opcode)
1428 
 
1429 
         update_previous_gprs;
1430 
 
1431 
      end
1432 
   endtask // or1200_check_execution
1433 348 julius 
 
1434 351 julius 
 
1435 449 julius 
   /////////////////////////////////////////////////////////////////////////
1436 
   // Instruction decode task
1437 
   /////////////////////////////////////////////////////////////////////////
1438 351 julius 
 
1439 
   task or1200_print_op;
1440 
      input [31:0] insn;
1441 
 
1442 
      reg [5:0]    opcode;
1443 
 
1444 
      reg [25:0]   j_imm;
1445 
      reg [25:0]   br_imm;
1446 
 
1447 
      reg [4:0]    rD_num, rA_num, rB_num;
1448 
      reg [31:0]   rA_val, rB_val;
1449 
      reg [15:0]   imm_16bit;
1450 
      reg [10:0]   imm_split16bit;
1451 
 
1452 
      reg [3:0]    alu_op;
1453 
      reg [1:0]    shrot_op;
1454 
 
1455 
      reg [5:0]    shroti_imm;
1456 
 
1457 449 julius 
      reg [5:0]    sf_op;
1458 351 julius 
 
1459 449 julius 
      reg [5:0]    xsync_op;
1460 
 
1461 351 julius 
      begin
1462 
         // Instruction opcode
1463 449 julius 
         opcode = insn[`OR1K_OPCODE_POS];
1464 351 julius 
         // Immediates for jump or branch instructions
1465 449 julius 
         j_imm = insn[`OR1K_J_BR_IMM_POS];
1466 
         br_imm = insn[`OR1K_J_BR_IMM_POS];
1467 351 julius 
         // Register numbers (D, A and B)
1468 449 julius 
         rD_num = insn[`OR1K_RD_POS];
1469 
         rA_num = insn[`OR1K_RA_POS];
1470 
         rB_num = insn[`OR1K_RB_POS];
1471 351 julius 
         // Bottom 16 bits when used as immediates in various instructions
1472 
         imm_16bit = insn[15:0];
1473 
         // Bottom 11 bits used as immediates for l.sX instructions
1474 
 
1475 
         // Split 16-bit immediate for l.mtspr/l.sX instructions
1476 
         imm_split16bit = {insn[25:21],insn[10:0]};
1477 
         // ALU op for ALU instructions
1478 449 julius 
         alu_op = insn[`OR1K_ALU_OP_POS];
1479 351 julius 
         // Shift-rotate op for SHROT ALU instructions
1480 449 julius 
         shrot_op = insn[`OR1K_SHROT_OP_POS];
1481 
         shroti_imm = insn[`OR1K_SHROTI_IMM_POS];
1482 351 julius 
 
1483 
         // Set flag op
1484 449 julius 
         sf_op = insn[`OR1K_SF_OP];
1485 351 julius 
 
1486 449 julius 
         // Xsync/syscall/trap opcode
1487 
         xsync_op = insn[`OR1K_XSYNC_OP_POS];
1488 
 
1489 351 julius 
         case (opcode)
1490 
           `OR1200_OR32_J:
1491 
             begin
1492 449 julius 
                $fwrite(finsn,"l.j 0x%h", {j_imm,2'b00});
1493 351 julius 
             end
1494 
 
1495 
           `OR1200_OR32_JAL:
1496 
             begin
1497 449 julius 
                $fwrite(finsn,"l.jal 0x%h", {j_imm,2'b00});
1498 351 julius 
             end
1499 
 
1500 
           `OR1200_OR32_BNF:
1501 
             begin
1502 449 julius 
                $fwrite(finsn,"l.bnf 0x%h", {br_imm,2'b00});
1503 351 julius 
             end
1504 
 
1505 
           `OR1200_OR32_BF:
1506 
             begin
1507 449 julius 
                $fwrite(finsn,"l.bf 0x%h", {br_imm,2'b00});
1508 351 julius 
             end
1509 
 
1510 
           `OR1200_OR32_RFE:
1511 
             begin
1512 449 julius 
                $fwrite(finsn,"l.rfe");
1513 351 julius 
             end
1514 
 
1515 
           `OR1200_OR32_JR:
1516 
             begin
1517 449 julius 
                $fwrite(finsn,"l.jr r%0d",rB_num);
1518 351 julius 
             end
1519 
 
1520 
           `OR1200_OR32_JALR:
1521 
             begin
1522 449 julius 
                $fwrite(finsn,"l.jalr r%0d",rB_num);
1523 351 julius 
             end
1524 
 
1525 
           `OR1200_OR32_LWZ:
1526 
             begin
1527 449 julius 
                $fwrite(finsn,"l.lwz r%0d,0x%0h(r%0d)",rD_num,imm_16bit,rA_num);
1528 351 julius 
             end
1529 
 
1530 
           `OR1200_OR32_LBZ:
1531 
             begin
1532 449 julius 
                $fwrite(finsn,"l.lbz r%0d,0x%0h(r%0d)",rD_num,imm_16bit,rA_num);
1533 351 julius 
             end
1534 
 
1535 
           `OR1200_OR32_LBS:
1536 
             begin
1537 449 julius 
                $fwrite(finsn,"l.lbs r%0d,0x%0h(r%0d)",rD_num,imm_16bit,rA_num);
1538 351 julius 
             end
1539 
 
1540 
           `OR1200_OR32_LHZ:
1541 
             begin
1542 449 julius 
                $fwrite(finsn,"l.lhz r%0d,0x%0h(r%0d)",rD_num,imm_16bit,rA_num);
1543 351 julius 
             end
1544 
 
1545 
           `OR1200_OR32_LHS:
1546 
             begin
1547 449 julius 
                $fwrite(finsn,"l.lhs r%0d,0x%0h(r%0d)",rD_num,imm_16bit,rA_num);
1548 351 julius 
             end
1549 
 
1550 
           `OR1200_OR32_SW:
1551 
             begin
1552 449 julius 
                $fwrite(finsn,"l.sw 0x%0h(r%0d),r%0d",imm_split16bit,rA_num,rB_num);
1553 351 julius 
             end
1554 
 
1555 
           `OR1200_OR32_SB:
1556 
             begin
1557 449 julius 
                $fwrite(finsn,"l.sb 0x%0h(r%0d),r%0d",imm_split16bit,rA_num,rB_num);
1558 351 julius 
             end
1559 
 
1560 
           `OR1200_OR32_SH:
1561 
             begin
1562 449 julius 
                $fwrite(finsn,"l.sh 0x%0h(r%0d),r%0d",imm_split16bit,rA_num,rB_num);
1563 351 julius 
             end
1564 
 
1565 
           `OR1200_OR32_MFSPR:
1566 
             begin
1567 449 julius 
                $fwrite(finsn,"l.mfspr r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit,);
1568 351 julius 
             end
1569 
 
1570 
           `OR1200_OR32_MTSPR:
1571 
             begin
1572 449 julius 
                $fwrite(finsn,"l.mtspr r%0d,r%0d,0x%h",rA_num,rB_num,imm_split16bit);
1573 351 julius 
             end
1574 
 
1575 
           `OR1200_OR32_MOVHI:
1576 
             begin
1577 
                if (!insn[16])
1578 449 julius 
                  $fwrite(finsn,"l.movhi r%0d,0x%h",rD_num,imm_16bit);
1579 351 julius 
                else
1580 449 julius 
                  $fwrite(finsn,"l.macrc r%0d",rD_num);
1581 351 julius 
             end
1582 
 
1583 
           `OR1200_OR32_ADDI:
1584 
             begin
1585 449 julius 
                $fwrite(finsn,"l.addi r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit);
1586 351 julius 
             end
1587 
 
1588 
           `OR1200_OR32_ADDIC:
1589 
             begin
1590 449 julius 
                $fwrite(finsn,"l.addic r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit);
1591 351 julius 
             end
1592 
 
1593 
           `OR1200_OR32_ANDI:
1594 
             begin
1595 449 julius 
                $fwrite(finsn,"l.andi r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit);
1596 351 julius 
             end
1597 
 
1598 
           `OR1200_OR32_ORI:
1599 
             begin
1600 449 julius 
                $fwrite(finsn,"l.ori r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit);
1601 351 julius 
             end
1602 
 
1603 
           `OR1200_OR32_XORI:
1604 
             begin
1605 449 julius 
                $fwrite(finsn,"l.xori r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit);
1606 351 julius 
             end
1607 
 
1608 
           `OR1200_OR32_MULI:
1609 
             begin
1610 449 julius 
                $fwrite(finsn,"l.muli r%0d,r%0d,0x%h",rD_num,rA_num,imm_16bit);
1611 351 julius 
             end
1612 
 
1613 
           `OR1200_OR32_ALU:
1614 
             begin
1615 
                case(alu_op)
1616 
                  `OR1200_ALUOP_ADD:
1617 449 julius 
                    $fwrite(finsn,"l.add ");
1618 351 julius 
                  `OR1200_ALUOP_ADDC:
1619 449 julius 
                    $fwrite(finsn,"l.addc ");
1620 351 julius 
                  `OR1200_ALUOP_SUB:
1621 449 julius 
                    $fwrite(finsn,"l.sub ");
1622 351 julius 
                  `OR1200_ALUOP_AND:
1623 449 julius 
                    $fwrite(finsn,"l.and ");
1624 351 julius 
                  `OR1200_ALUOP_OR:
1625 449 julius 
                    $fwrite(finsn,"l.or ");
1626 351 julius 
                  `OR1200_ALUOP_XOR:
1627 449 julius 
                    $fwrite(finsn,"l.xor ");
1628 351 julius 
                  `OR1200_ALUOP_MUL:
1629 449 julius 
                    $fwrite(finsn,"l.mul ");
1630 351 julius 
                  `OR1200_ALUOP_SHROT:
1631 
                    begin
1632 
                       case(shrot_op)
1633 
                         `OR1200_SHROTOP_SLL:
1634 449 julius 
                           $fwrite(finsn,"l.sll ");
1635 351 julius 
                         `OR1200_SHROTOP_SRL:
1636 449 julius 
                           $fwrite(finsn,"l.srl ");
1637 351 julius 
                         `OR1200_SHROTOP_SRA:
1638 449 julius 
                           $fwrite(finsn,"l.sra ");
1639 351 julius 
                         `OR1200_SHROTOP_ROR:
1640 449 julius 
                           $fwrite(finsn,"l.ror ");
1641 351 julius 
                       endcase // case (shrot_op)
1642 
                    end
1643 
                  `OR1200_ALUOP_DIV:
1644 449 julius 
                    $fwrite(finsn,"l.div ");
1645 351 julius 
                  `OR1200_ALUOP_DIVU:
1646 449 julius 
                    $fwrite(finsn,"l.divu ");
1647 351 julius 
                  `OR1200_ALUOP_CMOV:
1648 449 julius 
                    $fwrite(finsn,"l.cmov ");
1649 351 julius 
                endcase // case (alu_op)
1650 449 julius 
                $fwrite(finsn,"r%0d,r%0d,r%0d",rD_num,rA_num,rB_num);
1651 351 julius 
             end
1652 
 
1653 
           `OR1200_OR32_SH_ROTI:
1654 
             begin
1655 
                case(shrot_op)
1656 
                  `OR1200_SHROTOP_SLL:
1657 449 julius 
                    $fwrite(finsn,"l.slli ");
1658 351 julius 
                  `OR1200_SHROTOP_SRL:
1659 449 julius 
                    $fwrite(finsn,"l.srli ");
1660 351 julius 
                  `OR1200_SHROTOP_SRA:
1661 449 julius 
                    $fwrite(finsn,"l.srai ");
1662 351 julius 
                  `OR1200_SHROTOP_ROR:
1663 449 julius 
                    $fwrite(finsn,"l.rori ");
1664 351 julius 
                endcase // case (shrot_op)
1665 449 julius 
                $fwrite(finsn,"r%0d,r%0d,0x%h",rD_num,rA_num,shroti_imm);
1666 351 julius 
             end
1667 
 
1668 
           `OR1200_OR32_SFXXI:
1669 
             begin
1670 
                case(sf_op[2:0])
1671 
                  `OR1200_COP_SFEQ:
1672 449 julius 
                    $fwrite(finsn,"l.sfeqi ");
1673 351 julius 
                  `OR1200_COP_SFNE:
1674 449 julius 
                    $fwrite(finsn,"l.sfnei ");
1675 351 julius 
                  `OR1200_COP_SFGT:
1676 
                    begin
1677 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1678 449 julius 
                         $fwrite(finsn,"l.sfgtsi ");
1679 351 julius 
                       else
1680 449 julius 
                         $fwrite(finsn,"l.sfgtui ");
1681 351 julius 
                    end
1682 
                  `OR1200_COP_SFGE:
1683 
                    begin
1684 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1685 449 julius 
                         $fwrite(finsn,"l.sfgesi ");
1686 351 julius 
                       else
1687 449 julius 
                         $fwrite(finsn,"l.sfgeui ");
1688 351 julius 
                    end
1689 
                  `OR1200_COP_SFLT:
1690 
                    begin
1691 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1692 449 julius 
                         $fwrite(finsn,"l.sfltsi ");
1693 351 julius 
                       else
1694 449 julius 
                         $fwrite(finsn,"l.sfltui ");
1695 351 julius 
                    end
1696 
                  `OR1200_COP_SFLE:
1697 
                    begin
1698 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1699 449 julius 
                         $fwrite(finsn,"l.sflesi ");
1700 351 julius 
                       else
1701 449 julius 
                         $fwrite(finsn,"l.sfleui ");
1702 351 julius 
                    end
1703 
                endcase // case (sf_op[2:0])
1704 
 
1705 449 julius 
                $fwrite(finsn,"r%0d,0x%h",rA_num, imm_16bit);
1706 351 julius 
 
1707 
             end // case: `OR1200_OR32_SFXXI
1708 
 
1709 
           `OR1200_OR32_SFXX:
1710 
             begin
1711 
                case(sf_op[2:0])
1712 
                  `OR1200_COP_SFEQ:
1713 449 julius 
                    $fwrite(finsn,"l.sfeq ");
1714 351 julius 
                  `OR1200_COP_SFNE:
1715 449 julius 
                    $fwrite(finsn,"l.sfne ");
1716 351 julius 
                  `OR1200_COP_SFGT:
1717 
                    begin
1718 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1719 449 julius 
                         $fwrite(finsn,"l.sfgts ");
1720 351 julius 
                       else
1721 449 julius 
                         $fwrite(finsn,"l.sfgtu ");
1722 351 julius 
                    end
1723 
                  `OR1200_COP_SFGE:
1724 
                    begin
1725 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1726 449 julius 
                         $fwrite(finsn,"l.sfges ");
1727 351 julius 
                       else
1728 449 julius 
                         $fwrite(finsn,"l.sfgeu ");
1729 351 julius 
                    end
1730 
                  `OR1200_COP_SFLT:
1731 
                    begin
1732 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1733 449 julius 
                         $fwrite(finsn,"l.sflts ");
1734 351 julius 
                       else
1735 449 julius 
                         $fwrite(finsn,"l.sfltu ");
1736 351 julius 
                    end
1737 
                  `OR1200_COP_SFLE:
1738 
                    begin
1739 
                       if (sf_op[`OR1200_SIGNED_COMPARE])
1740 449 julius 
                         $fwrite(finsn,"l.sfles ");
1741 351 julius 
                       else
1742 449 julius 
                         $fwrite(finsn,"l.sfleu ");
1743 351 julius 
                    end
1744 
 
1745 
                endcase // case (sf_op[2:0])
1746 
 
1747 449 julius 
                $fwrite(finsn,"r%0d,r%0d",rA_num, rB_num);
1748 351 julius 
 
1749 
             end
1750 
 
1751 
           `OR1200_OR32_MACI:
1752 
             begin
1753 449 julius 
                $fwrite(finsn,"l.maci r%0d,0x%h",rA_num,imm_16bit);
1754 351 julius 
             end
1755 
 
1756 
           `OR1200_OR32_MACMSB:
1757 
             begin
1758 
                if(insn[3:0] == 4'h1)
1759 449 julius 
                  $fwrite(finsn,"l.mac ");
1760 351 julius 
                else if(insn[3:0] == 4'h2)
1761 449 julius 
                  $fwrite(finsn,"l.msb ");
1762 351 julius 
 
1763 449 julius 
                $fwrite(finsn,"r%0d,r%0d",rA_num,rB_num);
1764 351 julius 
             end
1765 
 
1766 
           `OR1200_OR32_NOP:
1767 
             begin
1768 449 julius 
                $fwrite(finsn,"l.nop 0x%0h",imm_16bit);
1769 351 julius 
             end
1770 
 
1771 
           `OR1200_OR32_XSYNC:
1772 
             begin
1773 
                case (xsync_op)
1774 
                  5'd0:
1775 449 julius 
                    $fwrite(finsn,"l.sys 0x%h",imm_16bit);
1776 351 julius 
                  5'd8:
1777 449 julius 
                    $fwrite(finsn,"l.trap 0x%h",imm_16bit);
1778 351 julius 
                  5'd16:
1779 449 julius 
                    $fwrite(finsn,"l.msync");
1780 351 julius 
                  5'd20:
1781 449 julius 
                    $fwrite(finsn,"l.psync");
1782 351 julius 
                  5'd24:
1783 449 julius 
                    $fwrite(finsn,"l.csync");
1784 351 julius 
                  default:
1785 
                    begin
1786 
                       $display("%t: Instruction with opcode 0x%h has bad specific type information: 0x%h",$time,opcode,insn);
1787 449 julius 
                       $fwrite(finsn,"%t: Instruction with opcode 0x%h has has bad specific type information: 0x%h",$time,opcode,insn);
1788 351 julius 
                    end
1789 
                endcase // case (xsync_op)
1790 
             end
1791 
 
1792 
           default:
1793 
             begin
1794 
                $display("%t: Unknown opcode 0x%h",$time,opcode);
1795 449 julius 
                $fwrite(finsn,"%t: Unknown opcode 0x%h",$time,opcode);
1796 351 julius 
             end
1797 
 
1798 
         endcase // case (opcode)
1799 
 
1800 
      end
1801 
   endtask // or1200_print_op
1802 
 
1803 
 
1804 
 
1805 6 julius 
endmodule

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