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// ========== Copyright Header Begin ==========================================

// 

// OpenSPARC T1 Processor File: sparc_ifu_errdp.v

// Copyright (c) 2006 Sun Microsystems, Inc.  All Rights Reserved.

// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES.

// 

// The above named program is free software; you can redistribute it and/or

// modify it under the terms of the GNU General Public

// License version 2 as published by the Free Software Foundation.

// 

// The above named program is distributed in the hope that it will be 

// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

// General Public License for more details.

// 

// You should have received a copy of the GNU General Public

// License along with this work; if not, write to the Free Software

// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

// 

// ========== Copyright Header End ============================================

////////////////////////////////////////////////////////////////////////

/*

//  Module Name:  sparc_ifu_errdp

*/

////////////////////////////////////////////////////////////////////////

// Global header file includes

////////////////////////////////////////////////////////////////////////

`include "lsu.h"

`include "ifu.h"

module sparc_ifu_errdp(/*AUTOARG*/

   // Outputs

   so, ifu_lsu_ldxa_data_w2, erb_dtu_imask, erd_erc_tlbt_pe_s1,

   erd_erc_tlbd_pe_s1, erd_erc_tagpe_s1, erd_erc_nirpe_s1,

   erd_erc_fetpe_s1, erd_erc_tte_pgsz,

   // Inputs

   rclk, se, si, erb_reset, itlb_rd_tte_data, itlb_rd_tte_tag,

   itlb_ifq_paddr_s, wsel_fdp_fetdata_s1, wsel_fdp_topdata_s1,

   wsel_erb_asidata_s, ict_itlb_tags_f, icv_itlb_valid_f,

   lsu_ifu_err_addr, spu_ifu_err_addr_w2, fdp_erb_pc_f,

   exu_ifu_err_reg_m, exu_ifu_err_synd_m, ffu_ifu_err_reg_w2,

   ffu_ifu_err_synd_w2, tlu_itlb_rw_index_g, erc_erd_pgsz_b0,

   erc_erd_pgsz_b1, erc_erd_erren_asidata, erc_erd_errstat_asidata,

   erc_erd_errinj_asidata, ifq_erb_asidata_i2, ifq_erb_wrtag_f,

   ifq_erb_wrindex_f, erc_erd_asiway_s1_l, fcl_erb_itlbrd_data_s,

   erc_erd_ld_imask, erc_erd_asisrc_sel_icd_s_l,

   erc_erd_asisrc_sel_misc_s_l, erc_erd_asisrc_sel_err_s_l,

   erc_erd_asisrc_sel_itlb_s_l, erc_erd_errasi_sel_en_l,

   erc_erd_errasi_sel_stat_l, erc_erd_errasi_sel_inj_l,

   erc_erd_errasi_sel_addr_l, erc_erd_miscasi_sel_ict_l,

   erc_erd_miscasi_sel_imask_l, erc_erd_miscasi_sel_other_l,

   erc_erd_asi_thr_l, erc_erd_eadr0_sel_irf_l,

   erc_erd_eadr0_sel_itlb_l, erc_erd_eadr0_sel_frf_l,

   erc_erd_eadr0_sel_lsu_l, erc_erd_eadr1_sel_pcd1_l,

   erc_erd_eadr1_sel_l1pa_l, erc_erd_eadr1_sel_l2pa_l,

   erc_erd_eadr1_sel_other_l, erc_erd_eadr2_sel_mx1_l,

   erc_erd_eadr2_sel_wrt_l, erc_erd_eadr2_sel_mx0_l,

   erc_erd_eadr2_sel_old_l

   );

   input       rclk,

               se,

               si,

               erb_reset;

   input [42:0] itlb_rd_tte_data;   // this is in s1

   input [58:0] itlb_rd_tte_tag;    // this is in s1

   input [39:10] itlb_ifq_paddr_s;

   input [33:0] wsel_fdp_fetdata_s1,

                            wsel_fdp_topdata_s1;

   input [33:0] wsel_erb_asidata_s;

   input [`IC_TAG_ALL_HI:0] ict_itlb_tags_f;

   input [3:0]              icv_itlb_valid_f;

   input [47:4]  lsu_ifu_err_addr;

   input [39:4]  spu_ifu_err_addr_w2;

   input [47:0]  fdp_erb_pc_f;

   input [7:0]   exu_ifu_err_reg_m;

   input [7:0]   exu_ifu_err_synd_m;

   input [5:0]   ffu_ifu_err_reg_w2;

   input [13:0]  ffu_ifu_err_synd_w2;

   input [5:0]   tlu_itlb_rw_index_g;

   input         erc_erd_pgsz_b0,

                 erc_erd_pgsz_b1;

   input [1:0]   erc_erd_erren_asidata;

   input [22:0]  erc_erd_errstat_asidata;

   input [31:0]  erc_erd_errinj_asidata;

   input [47:0]  ifq_erb_asidata_i2;

   input [`IC_TAG_SZ-1:0] ifq_erb_wrtag_f;

   input [`IC_IDX_HI:4]   ifq_erb_wrindex_f;

   // mux selects

   input [3:0]  erc_erd_asiway_s1_l;

   input        fcl_erb_itlbrd_data_s;

   input        erc_erd_ld_imask;

   input        erc_erd_asisrc_sel_icd_s_l,

                            erc_erd_asisrc_sel_misc_s_l,

                            erc_erd_asisrc_sel_err_s_l,

                            erc_erd_asisrc_sel_itlb_s_l;

   input        erc_erd_errasi_sel_en_l,

                            erc_erd_errasi_sel_stat_l,

                            erc_erd_errasi_sel_inj_l,

                            erc_erd_errasi_sel_addr_l;

   input        erc_erd_miscasi_sel_ict_l,

                            erc_erd_miscasi_sel_imask_l,

                            erc_erd_miscasi_sel_other_l;

   input [3:0]  erc_erd_asi_thr_l;

   input [3:0]  erc_erd_eadr0_sel_irf_l,

                            erc_erd_eadr0_sel_itlb_l,

                            erc_erd_eadr0_sel_frf_l,

                            erc_erd_eadr0_sel_lsu_l;

   input [3:0]  erc_erd_eadr1_sel_pcd1_l,

                            erc_erd_eadr1_sel_l1pa_l,

                            erc_erd_eadr1_sel_l2pa_l,

                            erc_erd_eadr1_sel_other_l;

   input [3:0]  erc_erd_eadr2_sel_mx1_l,

                            erc_erd_eadr2_sel_wrt_l,

                            erc_erd_eadr2_sel_mx0_l,

                            erc_erd_eadr2_sel_old_l;

   output       so;

   output [63:0] ifu_lsu_ldxa_data_w2;

   output [38:0] erb_dtu_imask;

//   output [9:0]  erb_ifq_paddr_s;

   output [1:0]  erd_erc_tlbt_pe_s1,

                             erd_erc_tlbd_pe_s1;

   output [3:0]  erd_erc_tagpe_s1;

   output        erd_erc_nirpe_s1,

                             erd_erc_fetpe_s1;

   output [2:0]  erd_erc_tte_pgsz;

//   

// local signals   

//

   wire [47:4]   lsu_err_addr;

   wire [`IC_TAG_ALL_HI:0]  ictags_s1;

   wire [3:0]               icv_data_s1;

   wire [31:0]              tag_asi_data;

   wire [47:4]              t0_eadr_mx0_out,

                                        t1_eadr_mx0_out,

                                        t2_eadr_mx0_out,

                                        t3_eadr_mx0_out,

                                        t0_eadr_mx1_out,

                                        t1_eadr_mx1_out,

                                        t2_eadr_mx1_out,

                                        t3_eadr_mx1_out;

   wire [47:4]              t0_err_addr_nxt,

                                        t0_err_addr,

                                        t1_err_addr_nxt,

                                        t1_err_addr,

                                        t2_err_addr_nxt,

                                        t2_err_addr,

                                        t3_err_addr_nxt,

                                        t3_err_addr;

   wire [47:4]              err_addr_asidata;

   wire [63:0]              formatted_tte_data,

                                        formatted_tte_tag,

                                        tlb_asi_data,

                                        misc_asi_data,

                                        err_asi_data,

                            ldxa_data_s,

                            ldxa_data_d;

   wire [39:4]              paddr_s1,

                                        paddr_d1;

   wire [39:4]              ifet_addr_f;

   wire [47:0]              pc_s1;

   wire [47:4]              pc_d1;

   wire [7:0]               irfaddr_w,

                            irfsynd_w;

   wire                     irfaddr_4_w;

   wire [5:0]               itlb_asi_index;

   wire [38:0]              imask_next;

   wire                     clk;

//

// Code Begins Here

//

   assign                   clk = rclk;

//-------------

// Tags

//-------------   

   dff_s #(`IC_TAG_ALL) tags_reg(.din (ict_itlb_tags_f),

                                           .q   (ictags_s1),

                                           .clk (clk),

                                           .se  (se), .si(), .so());

   dff_s #(4) vbits_reg(.din (icv_itlb_valid_f[3:0]),

                                  .q   (icv_data_s1),

                                  .clk (clk), .se(se), .si(), .so());

   // check parity

   sparc_ifu_par32  tag_par0(.in  ({3'b0, ictags_s1[`IC_TAG_SZ:0]}),

                                               .out (erd_erc_tagpe_s1[0]));

   sparc_ifu_par32  tag_par1(.in  ({3'b0, ictags_s1[((2*`IC_TAG_SZ) + 1):(`IC_TAG_SZ+1)]}),

                                               .out (erd_erc_tagpe_s1[1]));

   sparc_ifu_par32  tag_par2(.in  ({3'b0, ictags_s1[((3*`IC_TAG_SZ) + 2):(2*(`IC_TAG_SZ)+2)]}),

                                               .out (erd_erc_tagpe_s1[2]));

   sparc_ifu_par32  tag_par3(.in  ({3'b0, ictags_s1[((4*`IC_TAG_SZ) + 3):(3*(`IC_TAG_SZ)+3)]}),

                                               .out (erd_erc_tagpe_s1[3]));

   dp_mux4ds #(32) asitag_mux(.dout (tag_asi_data[31:0]),

                         .in0  ({icv_data_s1[0], 1'b0, ictags_s1[28], 1'b0, ictags_s1[27:0]}),

                         .in1  ({icv_data_s1[1], 1'b0, ictags_s1[57], 1'b0, ictags_s1[56:29]}),

                         .in2  ({icv_data_s1[2], 1'b0, ictags_s1[86], 1'b0, ictags_s1[85:58]}),

                         .in3  ({icv_data_s1[3], 1'b0, ictags_s1[115], 1'b0, ictags_s1[114:87]}),

                         .sel0_l (erc_erd_asiway_s1_l[0]),

                         .sel1_l (erc_erd_asiway_s1_l[1]),

                         .sel2_l (erc_erd_asiway_s1_l[2]),

                         .sel3_l (erc_erd_asiway_s1_l[3]));

//------------------

// Data

//------------------

   // parity check on instruction

   // This may have to be done in the next stage (at least partially)

   sparc_ifu_par34 nir_par(.in  (wsel_fdp_topdata_s1[33:0]),

                                             .out (erd_erc_nirpe_s1));

   sparc_ifu_par34 inst_par(.in  (wsel_fdp_fetdata_s1[33:0]),

                                              .out (erd_erc_fetpe_s1));

//----------------------------------------------------------------------

// TLB read data

//----------------------------------------------------------------------

//`ifdef SPARC_HPV_EN

   // don't include v(26) and u(24) bits in parity   

   sparc_ifu_par32 tt_tag_par0(.in  ({itlb_rd_tte_tag[33:27],

                                                              itlb_rd_tte_tag[25],

                                                              itlb_rd_tte_tag[23:0]}),

                                                 .out (erd_erc_tlbt_pe_s1[0]));

//`else

//   // don't include v(28) and u(26) bits in parity

//   sparc_ifu_par32 tt_tag_par0(.in  ({itlb_rd_tte_tag[33:29],

//                                                            itlb_rd_tte_tag[27],

//                                                            itlb_rd_tte_tag[25:0]}),

//                                               .out (erd_erc_tlbt_pe_s1[0]));

//`endif // !`ifdef SPARC_HPV_EN

   sparc_ifu_par32 tt_tag_par1(.in  ({7'b0, itlb_rd_tte_tag[58:34]}),

                                                 .out (erd_erc_tlbt_pe_s1[1]));

   sparc_ifu_par32 tt_data_par0(.in  (itlb_rd_tte_data[31:0]),

                                                        .out (erd_erc_tlbd_pe_s1[0]));

   sparc_ifu_par16 tt_data_par1(.in  ({5'b0, itlb_rd_tte_data[42:32]}),

                                                        .out (erd_erc_tlbd_pe_s1[1]));

//   assign erd_erc_tte_lock_s1 = itlb_rd_tte_data[`STLB_DATA_L];

//`ifdef        SPARC_HPV_EN

   assign erd_erc_tte_pgsz[2:0] = {itlb_rd_tte_data[`STLB_DATA_27_22_SEL],

                                                           itlb_rd_tte_data[`STLB_DATA_21_16_SEL],

                                                           itlb_rd_tte_data[`STLB_DATA_15_13_SEL]};

   assign formatted_tte_tag[63:0] =

          {

//           `ifdef SUN4V_TAG_RD

           // implement this!

           itlb_rd_tte_tag[58:55],

//           `else

//         {4{itlb_rd_tte_tag[53]}},                                     // 4b

//           `endif

           itlb_rd_tte_tag[`STLB_TAG_PARITY],     // Parity                 1b

           itlb_rd_tte_tag[`STLB_TAG_VA_27_22_V], // mxsel2 - b27:22 vld    1b

           itlb_rd_tte_tag[`STLB_TAG_VA_21_16_V], // mxsel1 - b21:16 vld    1b

           itlb_rd_tte_tag[`STLB_TAG_VA_15_13_V], // mxsel0 - b15:13 vld    1b

           {8{itlb_rd_tte_tag[53]}},                                     // 8b

           itlb_rd_tte_tag[`STLB_TAG_VA_47_28_HI:`STLB_TAG_VA_47_28_LO], // 20b

           itlb_rd_tte_tag[`STLB_TAG_VA_27_22_HI:`STLB_TAG_VA_27_22_LO], // 6b

           itlb_rd_tte_tag[`STLB_TAG_VA_21_16_HI:`STLB_TAG_VA_21_16_LO], // 6b

           itlb_rd_tte_tag[`STLB_TAG_VA_15_13_HI:`STLB_TAG_VA_15_13_LO], // 3b

           itlb_rd_tte_tag[`STLB_TAG_CTXT_12_0_HI:`STLB_TAG_CTXT_12_0_LO]// 13b

           } ;

//`else

//   assign erd_erc_tte_pgsz[2:0] = {itlb_rd_tte_data[`STLB_DATA_21_19_SEL],

//                                                         itlb_rd_tte_data[`STLB_DATA_18_16_SEL],

//                                                         itlb_rd_tte_data[`STLB_DATA_15_13_SEL]};

//

//   assign formatted_tte_tag[63:0] =

//          {

//           {16{itlb_rd_tte_tag[54]}},                                    // 16b

//           itlb_rd_tte_tag[`STLB_TAG_VA_47_22_HI:`STLB_TAG_VA_47_22_LO], // 26b

//           itlb_rd_tte_tag[`STLB_TAG_VA_21_20_HI:`STLB_TAG_VA_21_20_LO], // 3b

//           itlb_rd_tte_tag[`STLB_TAG_VA_19],

//           itlb_rd_tte_tag[`STLB_TAG_VA_18_17_HI:`STLB_TAG_VA_18_17_LO], // 3b

//           itlb_rd_tte_tag[`STLB_TAG_VA_16],

//           itlb_rd_tte_tag[`STLB_TAG_VA_15_14_HI:`STLB_TAG_VA_15_14_LO], // 3b

//           itlb_rd_tte_tag[`STLB_TAG_VA_13],

//           itlb_rd_tte_tag[`STLB_TAG_CTXT_12_7_HI:`STLB_TAG_CTXT_12_7_LO],//13b

//           itlb_rd_tte_tag[`STLB_TAG_CTXT_6_0_HI:`STLB_TAG_CTXT_6_0_LO]

//           } ;

//`endif // !`ifdef SPARC_HPV_EN

//`ifdef        SPARC_HPV_EN

   assign formatted_tte_data[63:0] =

          {

           itlb_rd_tte_tag[`STLB_TAG_V],           // V    (1b)

           erc_erd_pgsz_b1,                        // pg SZ msb 4m or 512k

           erc_erd_pgsz_b0,                        // pg sz lsb 4m or 64k

           itlb_rd_tte_data[`STLB_DATA_NFO],       // NFO  (1b)

           itlb_rd_tte_data[`STLB_DATA_IE],        // IE   (1b)

           10'b0,                                  // soft2 

           itlb_rd_tte_data[`STLB_DATA_27_22_SEL], // pgsz b2

           itlb_rd_tte_tag[`STLB_TAG_U],

           itlb_rd_tte_data[`STLB_DATA_PARITY],      // Parity   (1b)

           itlb_rd_tte_data[`STLB_DATA_27_22_SEL],   // mxsel2_l (1b)

           itlb_rd_tte_data[`STLB_DATA_21_16_SEL],   // mxsel1_l (1b)

           itlb_rd_tte_data[`STLB_DATA_15_13_SEL],   // mxsel0_l (1b)

           2'b0,                                   // unused diag 2b

           1'b0,                                   // ?? PA   (28b)

           itlb_rd_tte_data[`STLB_DATA_PA_39_28_HI:`STLB_DATA_PA_39_28_LO],

           itlb_rd_tte_data[`STLB_DATA_PA_27_22_HI:`STLB_DATA_PA_27_22_LO],

           itlb_rd_tte_data[`STLB_DATA_PA_21_16_HI:`STLB_DATA_PA_21_16_LO],

           itlb_rd_tte_data[`STLB_DATA_PA_15_13_HI:`STLB_DATA_PA_15_13_LO],

           6'b0,                                   // ?? 12-7 (6b)

           itlb_rd_tte_data[`STLB_DATA_L],         // L    (1b)

           itlb_rd_tte_data[`STLB_DATA_CP],        // CP   (1b)

           itlb_rd_tte_data[`STLB_DATA_CV],        // CV   (1b)

           itlb_rd_tte_data[`STLB_DATA_E],         // E    (1b)

           itlb_rd_tte_data[`STLB_DATA_P],         // P    (1b)

           itlb_rd_tte_data[`STLB_DATA_W],         // W    (1b)

                 1'b0

        } ;

//`else // !`ifdef SPARC_HPV_EN

//

//   assign formatted_tte_data[63:0] =

//          {      

//           itlb_rd_tte_tag[`STLB_TAG_V],           // V    (1b)

//           erc_erd_pgsz_b1,                        // pg SZ msb 4m or 512k

//           erc_erd_pgsz_b0,                        // pg sz lsb 4m or 64k

//           itlb_rd_tte_data[`STLB_DATA_NFO],       // NFO  (1b)

//           itlb_rd_tte_data[`STLB_DATA_IE],        // IE   (1b)

//           9'b0,                                   // soft2 58-42 (17b)

//           8'b0,                                   // diag 8b

//               itlb_rd_tte_tag[`STLB_TAG_U],           // U    (1b)

//           1'b0,                                   // ?? PA   (28b)

//           itlb_rd_tte_data[`STLB_DATA_PA_39_22_HI:`STLB_DATA_PA_39_22_LO],

//           itlb_rd_tte_data[`STLB_DATA_PA_21_19_HI:`STLB_DATA_PA_21_19_LO],

//           itlb_rd_tte_data[`STLB_DATA_PA_18_16_HI:`STLB_DATA_PA_18_16_LO],

//           itlb_rd_tte_data[`STLB_DATA_PA_15_13_HI:`STLB_DATA_PA_15_13_LO],

//           6'b0,                                   // ?? 12-7 (6b)

//           itlb_rd_tte_data[`STLB_DATA_L],         // L    (1b)

//           itlb_rd_tte_data[`STLB_DATA_CP],        // CP   (1b)

//           itlb_rd_tte_data[`STLB_DATA_CV],        // CV   (1b)

//           itlb_rd_tte_data[`STLB_DATA_E],         // E    (1b)

//           itlb_rd_tte_data[`STLB_DATA_P],         // P    (1b)

//           itlb_rd_tte_data[`STLB_DATA_W],         // W    (1b)

//           itlb_rd_tte_data[`STLB_DATA_G]          // G    (1b)

//        } ;

//`endif // !`ifdef SPARC_HPV_EN

   // mux in all asi values

   dp_mux2es #(64) itlbrd_mux(.dout (tlb_asi_data[63:0]),

                            .in0  (formatted_tte_tag[63:0]),

                            .in1  (formatted_tte_data[63:0]),

                            .sel  (fcl_erb_itlbrd_data_s));

   dp_mux4ds #(64) err_mux(.dout (err_asi_data[63:0]),

                         .in0  ({62'b0, erc_erd_erren_asidata}),

                         .in1  ({32'b0, erc_erd_errstat_asidata, 9'b0}),

                         .in2  ({32'b0, erc_erd_errinj_asidata}),

                         .in3  ({16'b0, err_addr_asidata, 4'b0}),

                         .sel0_l (erc_erd_errasi_sel_en_l),

                         .sel1_l (erc_erd_errasi_sel_stat_l),

                         .sel2_l (erc_erd_errasi_sel_inj_l),

                         .sel3_l (erc_erd_errasi_sel_addr_l));

   dp_mux3ds #(64) misc_asi_mux(.dout (misc_asi_data[63:0]),

                              .in0  ({29'b0,

                                            tag_asi_data[31:28],

                                            3'b0,

                                            tag_asi_data[27:0]}),

                              .in1  ({25'b0, erb_dtu_imask}),

                              .in2  (64'b0),

                              .sel0_l (erc_erd_miscasi_sel_ict_l),

                              .sel1_l (erc_erd_miscasi_sel_imask_l),

                              .sel2_l (erc_erd_miscasi_sel_other_l));

   // Final asi data

   // May need to add a flop to this mux output before sending it to the LSU

   dp_mux4ds #(64) final_asi_mux(.dout (ldxa_data_s),

                               .in0  (tlb_asi_data[63:0]),

                               .in1  (err_asi_data),

                               .in2  (misc_asi_data),

                               .in3  ({30'b0,

                                             wsel_erb_asidata_s[0],

                                             wsel_erb_asidata_s[33:1]}),

                               .sel0_l (erc_erd_asisrc_sel_itlb_s_l),

                               .sel1_l (erc_erd_asisrc_sel_err_s_l),

                               .sel2_l (erc_erd_asisrc_sel_misc_s_l),

                               .sel3_l (erc_erd_asisrc_sel_icd_s_l));

   dff_s #(64) ldxa_reg(.din (ldxa_data_s),

                      .q   (ldxa_data_d),

                      .clk (clk), .se(se), .si(), .so());

   assign ifu_lsu_ldxa_data_w2 = ldxa_data_d;

//----------------------------------------

// Error Address

//----------------------------------------   

   assign ifet_addr_f = {ifq_erb_wrtag_f[`IC_TAG_SZ-1:0],

                         ifq_erb_wrindex_f[`IC_IDX_HI:4]};

   // pc of latest access

   dff_s #(48) pcs1_reg(.din (fdp_erb_pc_f[47:0]),

                                  .q   (pc_s1[47:0]),

                                  .clk (clk), .se(se), .si(), .so());

   // Physical address

   assign paddr_s1[39:10] = itlb_ifq_paddr_s[39:10];

   assign paddr_s1[9:4]   = pc_s1[9:4];

   dff_s #(36) padd_reg(.din (paddr_s1[39:4]),

                                  .q   (paddr_d1[39:4]),

                                  .clk (clk), .se(se), .si(), .so());

//   assign erb_ifq_paddr_s[9:0] = pc_s1[9:0];

   // stage PC one more cycle

   dff_s #(44) pcd1_reg(.din (pc_s1[47:4]),

                                  .q   (pc_d1[47:4]),

                                  .clk (clk), .se(se), .si(), .so());

   // IRF address

   dff_s #(16) irf_reg(.din ({exu_ifu_err_reg_m[7:0],

                            exu_ifu_err_synd_m[7:0]}),

                                 .q   ({irfaddr_w[7:5],

                            irfaddr_4_w,

                            irfaddr_w[3:0],

                            irfsynd_w[7:0]}),

                                 .clk (clk), .se(se), .si(), .so());

   // fix for bug 5594

   // nand2 + xnor

   assign irfaddr_w[4] = irfaddr_4_w ^ (irfaddr_w[5] & irfaddr_w[3]);

   // itlb asi address

   dff_s #(6) itlbidx_reg(.din (tlu_itlb_rw_index_g),

                        .q   (itlb_asi_index),

                        .clk (clk), .se(se), .si(), .so());

   // lsu error address

   dff_s #(44) lsadr_reg(.din (lsu_ifu_err_addr),

                       .q   (lsu_err_addr),

                       .clk (clk), .se(se), .si(), .so());

   // mux in the different error addresses

   // thread 0

   dp_mux4ds #(44) t0_eadr_mx0(.dout  (t0_eadr_mx0_out),

                             .in0   ({24'b0, irfsynd_w[7:0], 4'b0, irfaddr_w[7:0]}),

                             .in1   ({38'b0, itlb_asi_index}),

                             .in2   ({17'b0, ffu_ifu_err_synd_w2[13:7],

                    1'b0, ffu_ifu_err_synd_w2[6:0],

                    6'b0, ffu_ifu_err_reg_w2[5:0]}),

                             .in3   (lsu_err_addr),

                             .sel0_l (erc_erd_eadr0_sel_irf_l[0]),

                             .sel1_l (erc_erd_eadr0_sel_itlb_l[0]),

                             .sel2_l (erc_erd_eadr0_sel_frf_l[0]),

                             .sel3_l (erc_erd_eadr0_sel_lsu_l[0]));

   dp_mux4ds #(44) t0_eadr_mx1(.dout  (t0_eadr_mx1_out),

                             .in0   (pc_d1[47:4]),

                             .in1   ({8'b0, paddr_d1[39:4]}),

                             .in2   ({8'b0, ifet_addr_f}),

                             .in3   ({8'b0, spu_ifu_err_addr_w2[39:4]}),

                             .sel0_l (erc_erd_eadr1_sel_pcd1_l[0]),

                             .sel1_l (erc_erd_eadr1_sel_l1pa_l[0]),

                             .sel2_l (erc_erd_eadr1_sel_l2pa_l[0]),

                             .sel3_l (erc_erd_eadr1_sel_other_l[0]));

   dp_mux4ds #(44) t0_eadr_mx2(.dout  (t0_err_addr_nxt),

                             .in0   (t0_eadr_mx0_out),

                             .in1   (t0_eadr_mx1_out),

                             .in2   (ifq_erb_asidata_i2[47:4]),

                             .in3   (t0_err_addr),

                             .sel0_l (erc_erd_eadr2_sel_mx0_l[0]),

                             .sel1_l (erc_erd_eadr2_sel_mx1_l[0]),

                             .sel2_l (erc_erd_eadr2_sel_wrt_l[0]),

                             .sel3_l (erc_erd_eadr2_sel_old_l[0]));

   dff_s #(44) t0_eadr_reg(.din (t0_err_addr_nxt),

                       .q   (t0_err_addr),

                       .clk (clk), .se(se), .si(), .so());

`ifdef FPGA_SYN_1THREAD

        assign err_addr_asidata = t0_err_addr;

`else

   // thread 1

   dp_mux4ds #(44) t1_eadr_mx0(.dout  (t1_eadr_mx0_out),

                             .in0   ({24'b0, irfsynd_w[7:0], 4'b0, irfaddr_w[7:0]}),

                             .in1   ({38'b0, itlb_asi_index}),

                             .in2   ({17'b0, ffu_ifu_err_synd_w2[13:7],

                    1'b0, ffu_ifu_err_synd_w2[6:0],

                    6'b0, ffu_ifu_err_reg_w2[5:0]}),

                             .in3   (lsu_err_addr),

                             .sel0_l (erc_erd_eadr0_sel_irf_l[1]),

                             .sel1_l (erc_erd_eadr0_sel_itlb_l[1]),

                             .sel2_l (erc_erd_eadr0_sel_frf_l[1]),

                             .sel3_l (erc_erd_eadr0_sel_lsu_l[1]));

   dp_mux4ds #(44) t1_eadr_mx1(.dout  (t1_eadr_mx1_out),

                             .in0   (pc_d1[47:4]),

                             .in1   ({8'b0, paddr_d1[39:4]}),

                             .in2   ({8'b0, ifet_addr_f}),

                             .in3   ({8'b0, spu_ifu_err_addr_w2[39:4]}),

//                           .in3   ({44'b0}),

                             .sel0_l (erc_erd_eadr1_sel_pcd1_l[1]),

                             .sel1_l (erc_erd_eadr1_sel_l1pa_l[1]),

                             .sel2_l (erc_erd_eadr1_sel_l2pa_l[1]),

                             .sel3_l (erc_erd_eadr1_sel_other_l[1]));

   dp_mux4ds #(44) t1_eadr_mx2(.dout  (t1_err_addr_nxt),

                             .in0   (t1_eadr_mx0_out),

                             .in1   (t1_eadr_mx1_out),

                             .in2   (ifq_erb_asidata_i2[47:4]),

                             .in3   (t1_err_addr),

                             .sel0_l (erc_erd_eadr2_sel_mx0_l[1]),

                             .sel1_l (erc_erd_eadr2_sel_mx1_l[1]),

                             .sel2_l (erc_erd_eadr2_sel_wrt_l[1]),

                             .sel3_l (erc_erd_eadr2_sel_old_l[1]));

   dff_s #(44) t1_eadr_reg(.din (t1_err_addr_nxt),

                       .q   (t1_err_addr),

                       .clk (clk), .se(se), .si(), .so());

   // thread 2

   dp_mux4ds #(44) t2_eadr_mx0(.dout  (t2_eadr_mx0_out),

                             .in0   ({24'b0, irfsynd_w[7:0], 4'b0, irfaddr_w[7:0]}),

                             .in1   ({38'b0, itlb_asi_index}),

                             .in2   ({17'b0, ffu_ifu_err_synd_w2[13:7],

                    1'b0, ffu_ifu_err_synd_w2[6:0],

                    6'b0, ffu_ifu_err_reg_w2[5:0]}),

                             .in3   (lsu_err_addr),

                             .sel0_l (erc_erd_eadr0_sel_irf_l[2]),

                             .sel1_l (erc_erd_eadr0_sel_itlb_l[2]),

                             .sel2_l (erc_erd_eadr0_sel_frf_l[2]),

                             .sel3_l (erc_erd_eadr0_sel_lsu_l[2]));

   dp_mux4ds #(44) t2_eadr_mx1(.dout  (t2_eadr_mx1_out),

                             .in0   (pc_d1[47:4]),

                             .in1   ({8'b0, paddr_d1[39:4]}),

                             .in2   ({8'b0, ifet_addr_f}),

                             .in3   ({8'b0, spu_ifu_err_addr_w2[39:4]}),

//                           .in3   ({44'b0}),

                             .sel0_l (erc_erd_eadr1_sel_pcd1_l[2]),

                             .sel1_l (erc_erd_eadr1_sel_l1pa_l[2]),

                             .sel2_l (erc_erd_eadr1_sel_l2pa_l[2]),

                             .sel3_l (erc_erd_eadr1_sel_other_l[2]));

   dp_mux4ds #(44) t2_eadr_mx2(.dout  (t2_err_addr_nxt),

                             .in0   (t2_eadr_mx0_out),

                             .in1   (t2_eadr_mx1_out),

                             .in2   (ifq_erb_asidata_i2[47:4]),