| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: dmu_ilu_iil_rcdbldr.v |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
| 27 | // may be used, or where a choice of which version of the GPL is applied is |
| 28 | // otherwise unspecified. |
| 29 | // |
| 30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 31 | // CA 95054 USA or visit www.sun.com if you need additional information or |
| 32 | // have any questions. |
| 33 | // |
| 34 | // ========== Copyright Header End ============================================ |
| 35 | module dmu_ilu_iil_rcdbldr ( |
| 36 | clk, |
| 37 | rst_l, |
| 38 | |
| 39 | p2d_ihb_data, |
| 40 | y2k_rcd, |
| 41 | |
| 42 | iil2isb_tag, |
| 43 | isb2iil_low_addr, |
| 44 | |
| 45 | ihb_rcd_is_cpl, |
| 46 | credit_type, |
| 47 | |
| 48 | is_ihb_rcd, |
| 49 | is_cto_rcd, |
| 50 | pio_tag_gen, |
| 51 | |
| 52 | in_ihb_rcd); |
| 53 | |
| 54 | // >>>>>>>>>>>>>>>>>>>>>>>>> Parameter Declarations <<<<<<<<<<<<<<<<<<<<<<<<< |
| 55 | |
| 56 | // rcd type |
| 57 | parameter DMA_MRD = 7'b0z00000, |
| 58 | DMA_MRDLK = 7'b0z00001, |
| 59 | DMA_MWR = 7'b1z00000, |
| 60 | DMA_IORD = 7'b0000010, |
| 61 | DMA_IOWR = 7'b1000010, |
| 62 | DMA_CFGRD = 7'b000010z, |
| 63 | DMA_CFGWR = 7'b100010z, |
| 64 | DMA_MSG = 7'b0110zzz, |
| 65 | PIO_CPL = 7'b0001010, |
| 66 | PIO_CPLD = 7'b1001010; |
| 67 | |
| 68 | // >>>>>>>>>>>>>>>>>>>>>>>>> Port Declarations <<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
| 69 | |
| 70 | //--------------------------------------------------------------------- |
| 71 | // Clock and Reset Signals |
| 72 | //--------------------------------------------------------------------- |
| 73 | input clk; // input clock |
| 74 | input rst_l; // synchronous reset |
| 75 | |
| 76 | //--------------------------------------------------------------------- |
| 77 | // IHB and IHB management interface |
| 78 | //--------------------------------------------------------------------- |
| 79 | input [`FIRE_IHB_REC_WDTH-1:0] p2d_ihb_data; // TLP header record |
| 80 | |
| 81 | //--------------------------------------------------------------------- |
| 82 | // record interface to TMU |
| 83 | //--------------------------------------------------------------------- |
| 84 | output [`FIRE_DLC_IPE_REC_WDTH-1:0] y2k_rcd; // ingress PEC record |
| 85 | |
| 86 | //--------------------------------------------------------------------- |
| 87 | // sub-block to sub-block interface |
| 88 | //--------------------------------------------------------------------- |
| 89 | output [4:0] iil2isb_tag; |
| 90 | input [3:2] isb2iil_low_addr; |
| 91 | |
| 92 | //--------------------------------------------------------------------- |
| 93 | // type decoder outputs |
| 94 | //--------------------------------------------------------------------- |
| 95 | output ihb_rcd_is_cpl; // to *_xfrfsm.v |
| 96 | output [1:0] credit_type; // header type, to *_crdtcnt.v |
| 97 | |
| 98 | //--------------------------------------------------------------------- |
| 99 | // info from *_xfrfsm.v |
| 100 | //--------------------------------------------------------------------- |
| 101 | input is_ihb_rcd; // in-process rcd a ihb rcd, from *_xfrfsm.v |
| 102 | input is_cto_rcd; // in-process rcd a CTO rcd, from *_xfrfsm.v |
| 103 | input [4:0] pio_tag_gen; // pio_tag for cpl generator, from *_xfrfsm.v |
| 104 | |
| 105 | //--------------------------------------------------------------------- |
| 106 | // talk to parchk |
| 107 | //--------------------------------------------------------------------- |
| 108 | output [`FIRE_IHB_REC_WDTH-1:0] in_ihb_rcd; |
| 109 | |
| 110 | // >>>>>>>>>>>>>>>>>>>>>>>>> Data Type Declarations <<<<<<<<<<<<<<<<<<<<<<<<< |
| 111 | |
| 112 | // ~~~~~~~~~~~~~~~~~~~~~~~~~ REGISTER - FLOPS ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 113 | reg [`FIRE_IHB_REC_WDTH-1:0] in_ihb_rcd; |
| 114 | reg [`FIRE_DLC_IPE_REC_WDTH-1:0] y2k_rcd; |
| 115 | |
| 116 | // ~~~~~~~~~~~~~~~~~~~~~~~~~ REGISTER - NON-FLOPS ~~~~~~~~~~~~~~~~~~~~~~~~ |
| 117 | reg ihb_rcd_is_cpl; |
| 118 | reg is_unsupported_req; |
| 119 | reg [1:0] credit_type; |
| 120 | |
| 121 | // ~~~~~~~~~~~~~~~~~~~~~~~~~ NETS ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 122 | wire [`FIRE_DLC_IPE_REC_WDTH-1:0] n_y2k_rcd; |
| 123 | |
| 124 | //--------------------------------------------------------------------- |
| 125 | // In record (IHB) fields |
| 126 | //--------------------------------------------------------------------- |
| 127 | wire [`FIRE_IHB_2DWH_WDTH-1:0] in_rcd_2dwh; |
| 128 | wire [`FIRE_IHB_3DWH_WDTH-1:0] in_rcd_3dwh; |
| 129 | wire [`FIRE_IHB_4DWH_WDTH-1:2] in_rcd_4dwh; // strip off 2-LSB |
| 130 | |
| 131 | //--------------------------------------------------------------------- |
| 132 | // Out record (ingress PEC) fields |
| 133 | //--------------------------------------------------------------------- |
| 134 | wire [`FIRE_DLC_IPE_ADDR_WDTH-1:30] out_rcd_addr_hi; // shared |
| 135 | |
| 136 | wire [29:0] out_ihb_rcd_addr_lo; // to be muxed |
| 137 | |
| 138 | wire [`FIRE_DLC_IPE_LEN_WDTH-1:0] out_rcd_len; // shared |
| 139 | wire [`FIRE_DLC_IPE_ATR_WDTH-1:0] out_rcd_atr; // shared |
| 140 | wire [`FIRE_DLC_IPE_TC_WDTH-1:0] out_rcd_tc; // shared |
| 141 | |
| 142 | wire [`FIRE_DLC_IPE_TYPE_WDTH-1:0] out_ihb_rcd_type; // to be muxed |
| 143 | wire [`FIRE_DLC_IPE_F_WDTH-1:0] out_ihb_rcd_f; // to be muxed |
| 144 | wire [2:0] out_ihb_cpl_status; // to be muxed |
| 145 | |
| 146 | wire [5:2] align_addr; |
| 147 | |
| 148 | //--------------------------------------------------------------------- |
| 149 | // new generated PIO cpl rcd |
| 150 | //--------------------------------------------------------------------- |
| 151 | wire [2:0] gen_cpl_rcd_status; |
| 152 | wire [29:0] gen_cpl_rcd_addr_lo; |
| 153 | |
| 154 | //--------------------------------------------------------------------- |
| 155 | // type decoder |
| 156 | //--------------------------------------------------------------------- |
| 157 | wire [6:0] in_rcd_type; |
| 158 | wire [2:0] in_rcd_cpl_status; |
| 159 | wire [4:0] in_rcd_pio_tag; |
| 160 | |
| 161 | wire is_successful_pio_cpl; |
| 162 | |
| 163 | // >>>>>>>>>>>>>>>>>>>>>>>>> Zero In Checkers <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
| 164 | |
| 165 | // 0in known_driven -var is_ihb_rcd |
| 166 | // 0in known_driven -var is_cto_rcd |
| 167 | // 0in bits_on -var credit_type -max 1 -active is_ihb_rcd -message "illegal credit_type" |
| 168 | // 0in bits_on -var {ihb_rcd_is_cpl, is_unsupported_req} -max 1 -active is_ihb_rcd |
| 169 | |
| 170 | // >>>>>>>>>>>>>>>>>>>>>>>>> RTL/Behavioral Model <<<<<<<<<<<<<<<<<<<<<<<<<<< |
| 171 | |
| 172 | //--------------------------------------------------------------------- |
| 173 | // In record fields |
| 174 | //--------------------------------------------------------------------- |
| 175 | assign in_rcd_2dwh = in_ihb_rcd[`FIRE_IHB_2DWH_MSB:`FIRE_IHB_2DWH_LSB]; |
| 176 | assign in_rcd_3dwh = in_ihb_rcd[`FIRE_IHB_3DWH_MSB:`FIRE_IHB_3DWH_LSB]; |
| 177 | assign in_rcd_4dwh = in_ihb_rcd[`FIRE_IHB_4DWH_MSB:`FIRE_IHB_4DWH_LSB+2]; |
| 178 | |
| 179 | //--------------------------------------------------------------------- |
| 180 | // type decoder |
| 181 | //--------------------------------------------------------------------- |
| 182 | |
| 183 | assign in_rcd_type = in_ihb_rcd[`FIRE_IHB_1DWH_MSB-1:`FIRE_IHB_1DWH_MSB-7]; |
| 184 | |
| 185 | assign in_rcd_cpl_status = in_rcd_2dwh[15:13]; |
| 186 | assign in_rcd_pio_tag = in_rcd_3dwh[12:8]; |
| 187 | assign is_successful_pio_cpl = ~(|in_rcd_cpl_status); |
| 188 | assign iil2isb_tag = is_ihb_rcd ? in_rcd_pio_tag : pio_tag_gen; |
| 189 | |
| 190 | always @ (in_rcd_type) |
| 191 | begin |
| 192 | ihb_rcd_is_cpl = 1'b0; |
| 193 | is_unsupported_req = 1'b0; |
| 194 | credit_type = 2'b0; |
| 195 | |
| 196 | casez (in_rcd_type) // 0in < case -parallel -full -active is_ihb_rcd |
| 197 | DMA_MRD, |
| 198 | DMA_MRDLK: credit_type = 2'b10; |
| 199 | |
| 200 | DMA_MWR, |
| 201 | DMA_MSG: credit_type = 2'b01; |
| 202 | |
| 203 | DMA_IORD, |
| 204 | DMA_CFGRD, |
| 205 | DMA_IOWR, |
| 206 | DMA_CFGWR: |
| 207 | begin |
| 208 | is_unsupported_req = 1'b1; |
| 209 | credit_type = 2'b10; |
| 210 | end |
| 211 | |
| 212 | PIO_CPL, |
| 213 | PIO_CPLD: |
| 214 | begin |
| 215 | ihb_rcd_is_cpl = 1'b1; |
| 216 | end |
| 217 | endcase // casez(in_rcd_type) |
| 218 | end |
| 219 | |
| 220 | |
| 221 | //--------------------------------------------------------------------- |
| 222 | // new rcd fields based on IHB rcd |
| 223 | //--------------------------------------------------------------------- |
| 224 | |
| 225 | assign out_ihb_rcd_f = is_unsupported_req ? |
| 226 | 2'b00 : in_rcd_type[6:5]; |
| 227 | assign out_ihb_rcd_type = is_unsupported_req ? 5'b01001 : in_rcd_type[4:0]; |
| 228 | |
| 229 | assign out_rcd_tc = in_ihb_rcd[`FIRE_IHB_1DWH_LSB+22:`FIRE_IHB_1DWH_LSB+20]; |
| 230 | |
| 231 | assign out_rcd_atr = in_ihb_rcd[`FIRE_IHB_1DWH_LSB+13:`FIRE_IHB_1DWH_LSB+12]; |
| 232 | assign out_rcd_len = in_ihb_rcd[`FIRE_IHB_1DWH_LSB+9:`FIRE_IHB_1DWH_LSB]; |
| 233 | |
| 234 | assign out_rcd_addr_hi = in_rcd_type[5] ? in_rcd_3dwh : 32'b0; |
| 235 | |
| 236 | assign align_addr = ihb_rcd_is_cpl ? {2'b0, isb2iil_low_addr[3:2]} : in_rcd_3dwh[5:2]; |
| 237 | |
| 238 | assign out_ihb_rcd_addr_lo = in_rcd_type[5] ? in_rcd_4dwh : |
| 239 | {in_rcd_3dwh[31:6], align_addr}; |
| 240 | |
| 241 | // -------------------------------------------------------------------------- |
| 242 | // According to the PCI-Express spec, all reserved status values |
| 243 | // (i.e. 011, 101, 110, and 111) must be treated as "Unsupported Request". |
| 244 | // Moreover, CLU maps the two unreserved status (unsupported request and |
| 245 | // completer abort) to JBUS bus error. Therefore, ILU traps PIO Cpl with |
| 246 | // configuration retry status (TLU takes care of it); converts PIO Cpl with |
| 247 | // status other that succesful to unsupported request status |
| 248 | // -------------------------------------------------------------------------- |
| 249 | assign out_ihb_cpl_status = is_successful_pio_cpl ? in_rcd_cpl_status : 3'b001; |
| 250 | |
| 251 | //--------------------------------------------------------------------- |
| 252 | // IIL sourced PIO Cpl rcd fields - new generated PIO cpl rcd, status is |
| 253 | // "UR" (3'b001) if it is in drain state, |
| 254 | // "TO" (3'b111 FIRE internal value) if it serves a CTO request from TLU |
| 255 | //--------------------------------------------------------------------- |
| 256 | assign gen_cpl_rcd_status = is_cto_rcd ? 3'b111 : 3'b001; |
| 257 | |
| 258 | assign gen_cpl_rcd_addr_lo = {{`FIRE_DLC_IPE_REQID_WDTH{1'b0}}, |
| 259 | {3'b0, pio_tag_gen}, |
| 260 | pio_tag_gen, pio_tag_gen[0]}; |
| 261 | // pio_tag_gen is used to fill rsv fields on the last line above |
| 262 | |
| 263 | //--------------------------------------------------------------------- |
| 264 | // n_y2k_rcd |
| 265 | //--------------------------------------------------------------------- |
| 266 | assign n_y2k_rcd = {(is_ihb_rcd ? {out_ihb_rcd_f, out_ihb_rcd_type} : 7'b0001010), |
| 267 | out_rcd_tc, |
| 268 | out_rcd_atr, |
| 269 | out_rcd_len, |
| 270 | in_rcd_2dwh[31:16], // req_id |
| 271 | (is_ihb_rcd ? (ihb_rcd_is_cpl ? out_ihb_cpl_status : |
| 272 | in_rcd_2dwh[15:13]) : |
| 273 | gen_cpl_rcd_status), |
| 274 | in_rcd_2dwh[12:0], |
| 275 | out_rcd_addr_hi, |
| 276 | (is_ihb_rcd ? out_ihb_rcd_addr_lo : gen_cpl_rcd_addr_lo) }; |
| 277 | |
| 278 | always @ (posedge clk) |
| 279 | if(~rst_l) begin |
| 280 | in_ihb_rcd <= {`FIRE_IHB_REC_WDTH{1'b0}}; |
| 281 | y2k_rcd <= {`FIRE_DLC_IPE_REC_WDTH{1'b0}}; |
| 282 | end |
| 283 | else begin |
| 284 | in_ihb_rcd <= p2d_ihb_data; |
| 285 | y2k_rcd <= n_y2k_rcd; |
| 286 | end |
| 287 | |
| 288 | // >>>>>>>>>>>>>>>>>>>>>>>>> Instantiations <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
| 289 | |
| 290 | endmodule // dmu_ilu_iil_rcdbldr |
| 291 | |