Line data Source code
1 : //********************************************************************************
2 : // SPDX-License-Identifier: Apache-2.0
3 : // Copyright 2020 Western Digital Corporation or its affiliates.
4 : //
5 : // Licensed under the Apache License, Version 2.0 (the "License");
6 : // you may not use this file except in compliance with the License.
7 : // You may obtain a copy of the License at
8 : //
9 : // http://www.apache.org/licenses/LICENSE-2.0
10 : //
11 : // Unless required by applicable law or agreed to in writing, software
12 : // distributed under the License is distributed on an "AS IS" BASIS,
13 : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 : // See the License for the specific language governing permissions and
15 : // limitations under the License.
16 : //********************************************************************************
17 :
18 : //********************************************************************************
19 : // Function: Programmable Interrupt Controller
20 : // Comments:
21 : //********************************************************************************
22 :
23 : module el2_pic_ctrl
24 : import el2_pkg::*;
25 : #(
26 : `include "el2_param.vh"
27 : )
28 : (
29 :
30 69942330 : input logic clk, // Core clock
31 69942330 : input logic free_clk, // free clock
32 343 : input logic rst_l, // Reset for all flops
33 4 : input logic clk_override, // Clock over-ride for gating
34 343 : input logic io_clk_override, // PIC IO Clock over-ride for gating
35 100 : input logic [pt.PIC_TOTAL_INT_PLUS1-1:0] extintsrc_req, // Interrupt requests
36 316 : input logic [31:0] picm_rdaddr, // Address of the register
37 316 : input logic [31:0] picm_wraddr, // Address of the register
38 92714 : input logic [31:0] picm_wr_data, // Data to be written to the register
39 30400 : input logic picm_wren, // Write enable to the register
40 9302 : input logic picm_rden, // Read enable for the register
41 10 : input logic picm_mken, // Read the Mask for the register
42 1170 : input logic [3:0] meicurpl, // Current Priority Level
43 38 : input logic [3:0] meipt, // Current Priority Threshold
44 :
45 1115 : output logic mexintpend, // External Inerrupt request to the core
46 0 : output logic [7:0] claimid, // Claim Id of the requested interrupt
47 172 : output logic [3:0] pl, // Priority level of the requested interrupt
48 0 : output logic [31:0] picm_rd_data, // Read data of the register
49 149 : output logic mhwakeup, // Wake-up interrupt request
50 : // Excluding scan_mode from coverage as its usage is determined by the integrator of the VeeR core.
51 : /*verilator coverage_off*/
52 : input logic scan_mode // scan mode
53 : /*verilator coverage_on*/
54 :
55 : );
56 :
57 : localparam NUM_LEVELS = $clog2(pt.PIC_TOTAL_INT_PLUS1);
58 : localparam INTPRIORITY_BASE_ADDR = pt.PIC_BASE_ADDR ;
59 : localparam INTPEND_BASE_ADDR = pt.PIC_BASE_ADDR + 32'h00001000 ;
60 : localparam INTENABLE_BASE_ADDR = pt.PIC_BASE_ADDR + 32'h00002000 ;
61 : localparam EXT_INTR_PIC_CONFIG = pt.PIC_BASE_ADDR + 32'h00003000 ;
62 : localparam EXT_INTR_GW_CONFIG = pt.PIC_BASE_ADDR + 32'h00004000 ;
63 : localparam EXT_INTR_GW_CLEAR = pt.PIC_BASE_ADDR + 32'h00005000 ;
64 :
65 :
66 : localparam INTPEND_SIZE = (pt.PIC_TOTAL_INT_PLUS1 < 32) ? 32 :
67 : (pt.PIC_TOTAL_INT_PLUS1 < 64) ? 64 :
68 : (pt.PIC_TOTAL_INT_PLUS1 < 128) ? 128 :
69 : (pt.PIC_TOTAL_INT_PLUS1 < 256) ? 256 :
70 : (pt.PIC_TOTAL_INT_PLUS1 < 512) ? 512 : 1024 ;
71 :
72 : localparam INT_GRPS = INTPEND_SIZE / 32 ;
73 : localparam INTPRIORITY_BITS = 4 ;
74 : localparam ID_BITS = 8 ;
75 : localparam int GW_CONFIG[pt.PIC_TOTAL_INT_PLUS1-1:0] = '{default:0} ;
76 :
77 : localparam INT_ENABLE_GRPS = (pt.PIC_TOTAL_INT_PLUS1 - 1) / 4 ;
78 :
79 27 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] intenable_clk_enable ;
80 0 : logic [INT_ENABLE_GRPS:0] intenable_clk_enable_grp ;
81 0 : logic [INT_ENABLE_GRPS:0] gw_clk ;
82 :
83 1368 : logic addr_intpend_base_match;
84 :
85 520 : logic raddr_config_pic_match ;
86 4654 : logic raddr_intenable_base_match;
87 2109103 : logic raddr_intpriority_base_match;
88 11744 : logic raddr_config_gw_base_match ;
89 :
90 524 : logic waddr_config_pic_match ;
91 2109346 : logic waddr_intpriority_base_match;
92 4846 : logic waddr_intenable_base_match;
93 11915 : logic waddr_config_gw_base_match ;
94 2420 : logic addr_clear_gw_base_match ;
95 :
96 1115 : logic mexintpend_in;
97 149 : logic mhwakeup_in ;
98 0 : logic intpend_reg_read ;
99 :
100 0 : logic [31:0] picm_rd_data_in, intpend_rd_out;
101 1418 : logic intenable_rd_out ;
102 1522 : logic [INTPRIORITY_BITS-1:0] intpriority_rd_out;
103 1554 : logic [1:0] gw_config_rd_out;
104 :
105 47 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] [INTPRIORITY_BITS-1:0] intpriority_reg;
106 32 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] [INTPRIORITY_BITS-1:0] intpriority_reg_inv;
107 300 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] intpriority_reg_we;
108 100 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] intpriority_reg_re;
109 18 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] [1:0] gw_config_reg;
110 :
111 38 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] intenable_reg;
112 300 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] intenable_reg_we;
113 100 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] intenable_reg_re;
114 300 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] gw_config_reg_we;
115 100 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] gw_config_reg_re;
116 60 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] gw_clear_reg_we;
117 :
118 84 : logic [INTPEND_SIZE-1:0] intpend_reg_extended;
119 :
120 27 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] [INTPRIORITY_BITS-1:0] intpend_w_prior_en;
121 0 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] [ID_BITS-1:0] intpend_id;
122 345 : logic [INTPRIORITY_BITS-1:0] maxint;
123 171 : logic [INTPRIORITY_BITS-1:0] selected_int_priority;
124 0 : logic [INT_GRPS-1:0] [31:0] intpend_rd_part_out ;
125 :
126 1 : logic config_reg;
127 1 : logic intpriord;
128 4 : logic config_reg_we ;
129 0 : logic config_reg_re ;
130 579487 : logic config_reg_in ;
131 0 : logic prithresh_reg_write , prithresh_reg_read;
132 3102 : logic intpriority_reg_read ;
133 3100 : logic intenable_reg_read ;
134 3100 : logic gw_config_reg_read ;
135 9302 : logic picm_wren_ff , picm_rden_ff ;
136 316 : logic [31:0] picm_raddr_ff;
137 316 : logic [31:0] picm_waddr_ff;
138 92714 : logic [31:0] picm_wr_data_ff;
139 570 : logic [3:0] mask;
140 10 : logic picm_mken_ff;
141 0 : logic [ID_BITS-1:0] claimid_in ;
142 171 : logic [INTPRIORITY_BITS-1:0] pl_in ;
143 172 : logic [INTPRIORITY_BITS-1:0] pl_in_q ;
144 :
145 0 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] extintsrc_req_sync;
146 72 : logic [pt.PIC_TOTAL_INT_PLUS1-1:0] extintsrc_req_gw;
147 0 : logic picm_bypass_ff;
148 :
149 : // clkens
150 9316 : logic pic_raddr_c1_clken;
151 0 : logic pic_waddr_c1_clken;
152 30404 : logic pic_data_c1_clken;
153 12408 : logic pic_pri_c1_clken;
154 12406 : logic pic_int_c1_clken;
155 12406 : logic gw_config_c1_clken;
156 :
157 : // clocks
158 69849905 : logic pic_raddr_c1_clk;
159 69870997 : logic pic_data_c1_clk;
160 69853005 : logic pic_pri_c1_clk;
161 69853005 : logic pic_int_c1_clk;
162 69853005 : logic gw_config_c1_clk;
163 :
164 : // ---- Clock gating section ------
165 : // c1 clock enables
166 : assign pic_raddr_c1_clken = picm_mken | picm_rden | clk_override;
167 : assign pic_data_c1_clken = picm_wren | clk_override;
168 : assign pic_pri_c1_clken = (waddr_intpriority_base_match & picm_wren_ff) | (raddr_intpriority_base_match & picm_rden_ff) | clk_override;
169 : assign pic_int_c1_clken = (waddr_intenable_base_match & picm_wren_ff) | (raddr_intenable_base_match & picm_rden_ff) | clk_override;
170 : assign gw_config_c1_clken = (waddr_config_gw_base_match & picm_wren_ff) | (raddr_config_gw_base_match & picm_rden_ff) | clk_override;
171 :
172 : // C1 - 1 clock pulse for data
173 : rvoclkhdr pic_addr_c1_cgc ( .en(pic_raddr_c1_clken), .l1clk(pic_raddr_c1_clk), .* );
174 : rvoclkhdr pic_data_c1_cgc ( .en(pic_data_c1_clken), .l1clk(pic_data_c1_clk), .* );
175 : rvoclkhdr pic_pri_c1_cgc ( .en(pic_pri_c1_clken), .l1clk(pic_pri_c1_clk), .* );
176 : rvoclkhdr pic_int_c1_cgc ( .en(pic_int_c1_clken), .l1clk(pic_int_c1_clk), .* );
177 : rvoclkhdr gw_config_c1_cgc ( .en(gw_config_c1_clken), .l1clk(gw_config_c1_clk), .* );
178 :
179 : // ------ end clock gating section ------------------------
180 :
181 : assign raddr_intenable_base_match = (picm_raddr_ff[31:NUM_LEVELS+2] == INTENABLE_BASE_ADDR[31:NUM_LEVELS+2]) ;
182 : assign raddr_intpriority_base_match = (picm_raddr_ff[31:NUM_LEVELS+2] == INTPRIORITY_BASE_ADDR[31:NUM_LEVELS+2]) ;
183 : assign raddr_config_gw_base_match = (picm_raddr_ff[31:NUM_LEVELS+2] == EXT_INTR_GW_CONFIG[31:NUM_LEVELS+2]) ;
184 : assign raddr_config_pic_match = (picm_raddr_ff[31:0] == EXT_INTR_PIC_CONFIG[31:0]) ;
185 :
186 : assign addr_intpend_base_match = (picm_raddr_ff[31:6] == INTPEND_BASE_ADDR[31:6]) ;
187 :
188 : assign waddr_config_pic_match = (picm_waddr_ff[31:0] == EXT_INTR_PIC_CONFIG[31:0]) ;
189 : assign addr_clear_gw_base_match = (picm_waddr_ff[31:NUM_LEVELS+2] == EXT_INTR_GW_CLEAR[31:NUM_LEVELS+2]) ;
190 : assign waddr_intpriority_base_match = (picm_waddr_ff[31:NUM_LEVELS+2] == INTPRIORITY_BASE_ADDR[31:NUM_LEVELS+2]) ;
191 : assign waddr_intenable_base_match = (picm_waddr_ff[31:NUM_LEVELS+2] == INTENABLE_BASE_ADDR[31:NUM_LEVELS+2]) ;
192 : assign waddr_config_gw_base_match = (picm_waddr_ff[31:NUM_LEVELS+2] == EXT_INTR_GW_CONFIG[31:NUM_LEVELS+2]) ;
193 :
194 : assign picm_bypass_ff = picm_rden_ff & picm_wren_ff & ( picm_raddr_ff[31:0] == picm_waddr_ff[31:0] ); // pic writes and reads to same address together
195 :
196 :
197 : rvdff #(32) picm_radd_flop (.*, .din (picm_rdaddr), .dout(picm_raddr_ff), .clk(pic_raddr_c1_clk));
198 : rvdff #(32) picm_wadd_flop (.*, .din (picm_wraddr), .dout(picm_waddr_ff), .clk(pic_data_c1_clk));
199 : rvdff #(1) picm_wre_flop (.*, .din (picm_wren), .dout(picm_wren_ff), .clk(free_clk));
200 : rvdff #(1) picm_rde_flop (.*, .din (picm_rden), .dout(picm_rden_ff), .clk(free_clk));
201 : rvdff #(1) picm_mke_flop (.*, .din (picm_mken), .dout(picm_mken_ff), .clk(free_clk));
202 : rvdff #(32) picm_dat_flop (.*, .din (picm_wr_data[31:0]), .dout(picm_wr_data_ff[31:0]), .clk(pic_data_c1_clk));
203 :
204 : //rvsyncss #(pt.PIC_TOTAL_INT_PLUS1-1) sync_inst
205 : //(
206 : // .clk (free_clk),
207 : // .dout(extintsrc_req_sync[pt.PIC_TOTAL_INT_PLUS1-1:1]),
208 : // .din (extintsrc_req[pt.PIC_TOTAL_INT_PLUS1-1:1]),
209 : // .*) ;
210 : //
211 : //assign extintsrc_req_sync[0] = extintsrc_req[0];
212 : /*
213 : genvar p ;
214 : for (p=0; p<=INT_ENABLE_GRPS ; p++) begin : IO_CLK_GRP
215 : if (p==INT_ENABLE_GRPS) begin : LAST_GRP
216 : assign intenable_clk_enable_grp[p] = |intenable_clk_enable[pt.PIC_TOTAL_INT_PLUS1-1 : p*4] | io_clk_override;
217 : rvoclkhdr intenable_c1_cgc ( .en(intenable_clk_enable_grp[p]), .l1clk(gw_clk[p]), .* );
218 : end else begin : CLK_GRPS
219 : assign intenable_clk_enable_grp[p] = |intenable_clk_enable[p*4+3 : p*4] | io_clk_override;
220 : rvoclkhdr intenable_c1_cgc ( .en(intenable_clk_enable_grp[p]), .l1clk(gw_clk[p]), .* );
221 : end
222 : end
223 : */
224 :
225 :
226 :
227 : genvar i ;
228 : genvar p ;
229 : for (p=0; p<=INT_ENABLE_GRPS ; p++) begin : IO_CLK_GRP
230 : wire grp_clk, grp_clken;
231 :
232 : assign grp_clken = |intenable_clk_enable[(p==INT_ENABLE_GRPS?pt.PIC_TOTAL_INT_PLUS1-1:p*4+3) : p*4] | io_clk_override;
233 :
234 : `ifndef RV_FPGA_OPTIMIZE
235 : rvclkhdr intenable_c1_cgc( .en(grp_clken), .l1clk(grp_clk), .* );
236 : `else
237 : assign gw_clk[p] = 1'b0 ;
238 : `endif
239 :
240 : for(genvar i= (p==0 ? 1: 0); i< (p==INT_ENABLE_GRPS ? pt.PIC_TOTAL_INT_PLUS1-p*4 :4); i++) begin : GW
241 : el2_configurable_gw gw_inst(
242 : .*,
243 : .gw_clk(grp_clk),
244 : .rawclk(clk),
245 : .clken (grp_clken),
246 : .extintsrc_req(extintsrc_req[i+p*4]) ,
247 : .meigwctrl_polarity(gw_config_reg[i+p*4][0]) ,
248 : .meigwctrl_type(gw_config_reg[i+p*4][1]) ,
249 : .meigwclr(gw_clear_reg_we[i+p*4]) ,
250 : .extintsrc_req_config(extintsrc_req_gw[i+p*4])
251 : );
252 : end
253 : end
254 :
255 :
256 :
257 :
258 :
259 :
260 :
261 :
262 : for (i=0; i<pt.PIC_TOTAL_INT_PLUS1 ; i++) begin : SETREG
263 :
264 : if (i > 0 ) begin : NON_ZERO_INT
265 : assign intpriority_reg_we[i] = waddr_intpriority_base_match & (picm_waddr_ff[NUM_LEVELS+1:2] == i) & picm_wren_ff;
266 : assign intpriority_reg_re[i] = raddr_intpriority_base_match & (picm_raddr_ff[NUM_LEVELS+1:2] == i) & picm_rden_ff;
267 :
268 : assign intenable_reg_we[i] = waddr_intenable_base_match & (picm_waddr_ff[NUM_LEVELS+1:2] == i) & picm_wren_ff;
269 : assign intenable_reg_re[i] = raddr_intenable_base_match & (picm_raddr_ff[NUM_LEVELS+1:2] == i) & picm_rden_ff;
270 :
271 : assign gw_config_reg_we[i] = waddr_config_gw_base_match & (picm_waddr_ff[NUM_LEVELS+1:2] == i) & picm_wren_ff;
272 : assign gw_config_reg_re[i] = raddr_config_gw_base_match & (picm_raddr_ff[NUM_LEVELS+1:2] == i) & picm_rden_ff;
273 :
274 : assign gw_clear_reg_we[i] = addr_clear_gw_base_match & (picm_waddr_ff[NUM_LEVELS+1:2] == i) & picm_wren_ff ;
275 :
276 : rvdffs #(INTPRIORITY_BITS) intpriority_ff (.*, .en( intpriority_reg_we[i]), .din (picm_wr_data_ff[INTPRIORITY_BITS-1:0]), .dout(intpriority_reg[i]), .clk(pic_pri_c1_clk));
277 : rvdffs #(1) intenable_ff (.*, .en( intenable_reg_we[i]), .din (picm_wr_data_ff[0]), .dout(intenable_reg[i]), .clk(pic_int_c1_clk));
278 : rvdffs #(2) gw_config_ff (.*, .en( gw_config_reg_we[i]), .din (picm_wr_data_ff[1:0]), .dout(gw_config_reg[i]), .clk(gw_config_c1_clk));
279 :
280 : assign intenable_clk_enable[i] = gw_config_reg[i][1] | intenable_reg_we[i] | intenable_reg[i] | gw_clear_reg_we[i] ;
281 :
282 : /*
283 : rvsyncss_fpga #(1) sync_inst
284 : (
285 : .gw_clk (gw_clk[i/4]),
286 : .rawclk (clk),
287 : .clken (intenable_clk_enable_grp[i/4]),
288 : .dout (extintsrc_req_sync[i]),
289 : .din (extintsrc_req[i]),
290 : .*) ;
291 :
292 :
293 :
294 :
295 :
296 : el2_configurable_gw config_gw_inst(.*,
297 : .gw_clk(gw_clk[i/4]),
298 : .rawclk(clk),
299 : .clken (intenable_clk_enable_grp[i/4]),
300 : .extintsrc_req_sync(extintsrc_req_sync[i]) ,
301 : .meigwctrl_polarity(gw_config_reg[i][0]) ,
302 : .meigwctrl_type(gw_config_reg[i][1]) ,
303 : .meigwclr(gw_clear_reg_we[i]) ,
304 : .extintsrc_req_config(extintsrc_req_gw[i])
305 : );
306 : */
307 :
308 : end else begin : INT_ZERO
309 : assign intpriority_reg_we[i] = 1'b0 ;
310 : assign intpriority_reg_re[i] = 1'b0 ;
311 : assign intenable_reg_we[i] = 1'b0 ;
312 : assign intenable_reg_re[i] = 1'b0 ;
313 :
314 : assign gw_config_reg_we[i] = 1'b0 ;
315 : assign gw_config_reg_re[i] = 1'b0 ;
316 : assign gw_clear_reg_we[i] = 1'b0 ;
317 :
318 : assign gw_config_reg[i] = '0 ;
319 :
320 : assign intpriority_reg[i] = {INTPRIORITY_BITS{1'b0}} ;
321 : assign intenable_reg[i] = 1'b0 ;
322 : assign extintsrc_req_gw[i] = 1'b0 ;
323 : assign extintsrc_req_sync[i] = 1'b0 ;
324 : assign intenable_clk_enable[i] = 1'b0;
325 : end
326 :
327 :
328 : assign intpriority_reg_inv[i] = intpriord ? ~intpriority_reg[i] : intpriority_reg[i] ;
329 :
330 : assign intpend_w_prior_en[i] = {INTPRIORITY_BITS{(extintsrc_req_gw[i] & intenable_reg[i])}} & intpriority_reg_inv[i] ;
331 : assign intpend_id[i] = i ;
332 : end
333 :
334 :
335 : assign pl_in[INTPRIORITY_BITS-1:0] = selected_int_priority[INTPRIORITY_BITS-1:0] ;
336 :
337 : //if (pt.PIC_2CYCLE == 1) begin : genblock
338 : //end
339 : //else begin : genblock
340 : //end
341 :
342 : genvar l, m , j, k;
343 :
344 : if (pt.PIC_2CYCLE == 1) begin : genblock
345 : logic [NUM_LEVELS/2:0] [pt.PIC_TOTAL_INT_PLUS1+2:0] [INTPRIORITY_BITS-1:0] level_intpend_w_prior_en;
346 : logic [NUM_LEVELS/2:0] [pt.PIC_TOTAL_INT_PLUS1+2:0] [ID_BITS-1:0] level_intpend_id;
347 : logic [NUM_LEVELS:NUM_LEVELS/2] [(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2))+1:0] [INTPRIORITY_BITS-1:0] levelx_intpend_w_prior_en;
348 : logic [NUM_LEVELS:NUM_LEVELS/2] [(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2))+1:0] [ID_BITS-1:0] levelx_intpend_id;
349 :
350 : assign level_intpend_w_prior_en[0][pt.PIC_TOTAL_INT_PLUS1+2:0] = {4'b0,4'b0,4'b0,intpend_w_prior_en[pt.PIC_TOTAL_INT_PLUS1-1:0]} ;
351 : assign level_intpend_id[0][pt.PIC_TOTAL_INT_PLUS1+2:0] = {8'b0,8'b0,8'b0,intpend_id[pt.PIC_TOTAL_INT_PLUS1-1:0]} ;
352 :
353 : logic [(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2)):0] [INTPRIORITY_BITS-1:0] l2_intpend_w_prior_en_ff;
354 : logic [(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2)):0] [ID_BITS-1:0] l2_intpend_id_ff;
355 :
356 : assign levelx_intpend_w_prior_en[NUM_LEVELS/2][(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2))+1:0] = {{1*INTPRIORITY_BITS{1'b0}},l2_intpend_w_prior_en_ff[(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2)):0]} ;
357 : assign levelx_intpend_id[NUM_LEVELS/2][(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2))+1:0] = {{1*ID_BITS{1'b1}},l2_intpend_id_ff[(pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2)):0]} ;
358 : /// Do the prioritization of the interrupts here ////////////
359 : for (l=0; l<NUM_LEVELS/2 ; l++) begin : TOP_LEVEL
360 : for (m=0; m<=(pt.PIC_TOTAL_INT_PLUS1)/(2**(l+1)) ; m++) begin : COMPARE
361 : if ( m == (pt.PIC_TOTAL_INT_PLUS1)/(2**(l+1))) begin
362 : assign level_intpend_w_prior_en[l+1][m+1] = '0 ;
363 : assign level_intpend_id[l+1][m+1] = '0 ;
364 : end
365 : el2_cmp_and_mux #(.ID_BITS(ID_BITS),
366 : .INTPRIORITY_BITS(INTPRIORITY_BITS)) cmp_l1 (
367 : .a_id(level_intpend_id[l][2*m]),
368 : .a_priority(level_intpend_w_prior_en[l][2*m]),
369 : .b_id(level_intpend_id[l][2*m+1]),
370 : .b_priority(level_intpend_w_prior_en[l][2*m+1]),
371 : .out_id(level_intpend_id[l+1][m]),
372 : .out_priority(level_intpend_w_prior_en[l+1][m])) ;
373 :
374 : end
375 : end
376 :
377 : for (i=0; i<=pt.PIC_TOTAL_INT_PLUS1/2**(NUM_LEVELS/2) ; i++) begin : MIDDLE_FLOPS
378 : rvdff #(INTPRIORITY_BITS) level2_intpend_prior_reg (.*, .din (level_intpend_w_prior_en[NUM_LEVELS/2][i]), .dout(l2_intpend_w_prior_en_ff[i]), .clk(free_clk));
379 : rvdff #(ID_BITS) level2_intpend_id_reg (.*, .din (level_intpend_id[NUM_LEVELS/2][i]), .dout(l2_intpend_id_ff[i]), .clk(free_clk));
380 : end
381 :
382 : for (j=NUM_LEVELS/2; j<NUM_LEVELS ; j++) begin : BOT_LEVELS
383 : for (k=0; k<=(pt.PIC_TOTAL_INT_PLUS1)/(2**(j+1)) ; k++) begin : COMPARE
384 : if ( k == (pt.PIC_TOTAL_INT_PLUS1)/(2**(j+1))) begin
385 : assign levelx_intpend_w_prior_en[j+1][k+1] = '0 ;
386 : assign levelx_intpend_id[j+1][k+1] = '0 ;
387 : end
388 : el2_cmp_and_mux #(.ID_BITS(ID_BITS),
389 : .INTPRIORITY_BITS(INTPRIORITY_BITS))
390 : cmp_l1 (
391 : .a_id(levelx_intpend_id[j][2*k]),
392 : .a_priority(levelx_intpend_w_prior_en[j][2*k]),
393 : .b_id(levelx_intpend_id[j][2*k+1]),
394 : .b_priority(levelx_intpend_w_prior_en[j][2*k+1]),
395 : .out_id(levelx_intpend_id[j+1][k]),
396 : .out_priority(levelx_intpend_w_prior_en[j+1][k])) ;
397 : end
398 : end
399 : assign claimid_in[ID_BITS-1:0] = levelx_intpend_id[NUM_LEVELS][0] ; // This is the last level output
400 : assign selected_int_priority[INTPRIORITY_BITS-1:0] = levelx_intpend_w_prior_en[NUM_LEVELS][0] ;
401 : end
402 : else begin : genblock
403 :
404 : logic [NUM_LEVELS:0] [pt.PIC_TOTAL_INT_PLUS1+1:0] [INTPRIORITY_BITS-1:0] level_intpend_w_prior_en;
405 : logic [NUM_LEVELS:0] [pt.PIC_TOTAL_INT_PLUS1+1:0] [ID_BITS-1:0] level_intpend_id;
406 :
407 : assign level_intpend_w_prior_en[0][pt.PIC_TOTAL_INT_PLUS1+1:0] = {{2*INTPRIORITY_BITS{1'b0}},intpend_w_prior_en[pt.PIC_TOTAL_INT_PLUS1-1:0]} ;
408 : assign level_intpend_id[0][pt.PIC_TOTAL_INT_PLUS1+1:0] = {{2*ID_BITS{1'b1}},intpend_id[pt.PIC_TOTAL_INT_PLUS1-1:0]} ;
409 :
410 : /// Do the prioritization of the interrupts here ////////////
411 : // genvar l, m , j, k; already declared outside ifdef
412 : for (l=0; l<NUM_LEVELS ; l++) begin : LEVEL
413 : for (m=0; m<=(pt.PIC_TOTAL_INT_PLUS1)/(2**(l+1)) ; m++) begin : COMPARE
414 : if ( m == (pt.PIC_TOTAL_INT_PLUS1)/(2**(l+1))) begin
415 : assign level_intpend_w_prior_en[l+1][m+1] = '0 ;
416 : assign level_intpend_id[l+1][m+1] = '0 ;
417 : end
418 : el2_cmp_and_mux #(.ID_BITS(ID_BITS),
419 : .INTPRIORITY_BITS(INTPRIORITY_BITS)) cmp_l1 (
420 : .a_id(level_intpend_id[l][2*m]),
421 : .a_priority(level_intpend_w_prior_en[l][2*m]),
422 : .b_id(level_intpend_id[l][2*m+1]),
423 : .b_priority(level_intpend_w_prior_en[l][2*m+1]),
424 : .out_id(level_intpend_id[l+1][m]),
425 : .out_priority(level_intpend_w_prior_en[l+1][m])) ;
426 :
427 : end
428 : end
429 : assign claimid_in[ID_BITS-1:0] = level_intpend_id[NUM_LEVELS][0] ; // This is the last level output
430 : assign selected_int_priority[INTPRIORITY_BITS-1:0] = level_intpend_w_prior_en[NUM_LEVELS][0] ;
431 :
432 : end
433 :
434 :
435 :
436 : ///////////////////////////////////////////////////////////////////////
437 : // Config Reg`
438 : ///////////////////////////////////////////////////////////////////////
439 : assign config_reg_we = waddr_config_pic_match & picm_wren_ff;
440 : assign config_reg_re = raddr_config_pic_match & picm_rden_ff;
441 :
442 : assign config_reg_in = picm_wr_data_ff[0] ; //
443 : rvdffs #(1) config_reg_ff (.*, .clk(free_clk), .en(config_reg_we), .din (config_reg_in), .dout(config_reg));
444 :
445 : assign intpriord = config_reg ;
446 :
447 :
448 :
449 : //////////////////////////////////////////////////////////////////////////
450 : // Send the interrupt to the core if it is above the thresh-hold
451 : //////////////////////////////////////////////////////////////////////////
452 : ///////////////////////////////////////////////////////////
453 : /// ClaimId Reg and Corresponding PL
454 : ///////////////////////////////////////////////////////////
455 : //
456 : assign pl_in_q[INTPRIORITY_BITS-1:0] = intpriord ? ~pl_in : pl_in ;
457 : rvdff #(ID_BITS) claimid_ff (.*, .din (claimid_in[ID_BITS-1:00]), .dout(claimid[ID_BITS-1:00]), .clk(free_clk));
458 : rvdff #(INTPRIORITY_BITS) pl_ff (.*, .din (pl_in_q[INTPRIORITY_BITS-1:0]), .dout(pl[INTPRIORITY_BITS-1:0]), .clk(free_clk));
459 :
460 39 : logic [INTPRIORITY_BITS-1:0] meipt_inv , meicurpl_inv ;
461 : assign meipt_inv[INTPRIORITY_BITS-1:0] = intpriord ? ~meipt[INTPRIORITY_BITS-1:0] : meipt[INTPRIORITY_BITS-1:0] ;
462 : assign meicurpl_inv[INTPRIORITY_BITS-1:0] = intpriord ? ~meicurpl[INTPRIORITY_BITS-1:0] : meicurpl[INTPRIORITY_BITS-1:0] ;
463 : assign mexintpend_in = (( selected_int_priority[INTPRIORITY_BITS-1:0] > meipt_inv[INTPRIORITY_BITS-1:0]) &
464 : ( selected_int_priority[INTPRIORITY_BITS-1:0] > meicurpl_inv[INTPRIORITY_BITS-1:0]) );
465 : rvdff #(1) mexintpend_ff (.*, .clk(free_clk), .din (mexintpend_in), .dout(mexintpend));
466 :
467 : assign maxint[INTPRIORITY_BITS-1:0] = intpriord ? 0 : 15 ;
468 : assign mhwakeup_in = ( pl_in_q[INTPRIORITY_BITS-1:0] == maxint) ;
469 : rvdff #(1) wake_up_ff (.*, .clk(free_clk), .din (mhwakeup_in), .dout(mhwakeup));
470 :
471 :
472 :
473 :
474 :
475 : //////////////////////////////////////////////////////////////////////////
476 : // Reads of register.
477 : // 1- intpending
478 : //////////////////////////////////////////////////////////////////////////
479 :
480 : assign intpend_reg_read = addr_intpend_base_match & picm_rden_ff ;
481 : assign intpriority_reg_read = raddr_intpriority_base_match & picm_rden_ff;
482 : assign intenable_reg_read = raddr_intenable_base_match & picm_rden_ff;
483 : assign gw_config_reg_read = raddr_config_gw_base_match & picm_rden_ff;
484 :
485 : assign intpend_reg_extended[INTPEND_SIZE-1:0] = {{INTPEND_SIZE-pt.PIC_TOTAL_INT_PLUS1{1'b0}},extintsrc_req_gw[pt.PIC_TOTAL_INT_PLUS1-1:0]} ;
486 :
487 : for (i=0; i<(INT_GRPS); i++) begin
488 : assign intpend_rd_part_out[i] = (({32{intpend_reg_read & picm_raddr_ff[5:2] == i}}) & intpend_reg_extended[((32*i)+31):(32*i)]) ;
489 : end
490 :
491 344 : always_comb begin : INTPEND_RD
492 344 : intpend_rd_out = '0 ;
493 344 : for (int i=0; i<INT_GRPS; i++) begin
494 688 : intpend_rd_out |= intpend_rd_part_out[i] ;
495 : end
496 : end
497 :
498 344 : always_comb begin : INTEN_RD
499 344 : intenable_rd_out = '0 ;
500 344 : intpriority_rd_out = '0 ;
501 344 : gw_config_rd_out = '0 ;
502 344 : for (int i=0; i<pt.PIC_TOTAL_INT_PLUS1; i++) begin
503 910433492 : if (intenable_reg_re[i]) begin
504 9300 : intenable_rd_out = intenable_reg[i] ;
505 : end
506 910433492 : if (intpriority_reg_re[i]) begin
507 9300 : intpriority_rd_out = intpriority_reg[i] ;
508 : end
509 910433492 : if (gw_config_reg_re[i]) begin
510 9300 : gw_config_rd_out = gw_config_reg[i] ;
511 : end
512 : end
513 : end
514 :
515 :
516 : assign picm_rd_data_in[31:0] = ({32{intpend_reg_read }} & intpend_rd_out ) |
517 : ({32{intpriority_reg_read }} & {{32-INTPRIORITY_BITS{1'b0}}, intpriority_rd_out } ) |
518 : ({32{intenable_reg_read }} & {31'b0 , intenable_rd_out } ) |
519 : ({32{gw_config_reg_read }} & {30'b0 , gw_config_rd_out } ) |
520 : ({32{config_reg_re }} & {31'b0 , config_reg } ) |
521 : ({32{picm_mken_ff & mask[3]}} & {30'b0 , 2'b11 } ) |
522 : ({32{picm_mken_ff & mask[2]}} & {31'b0 , 1'b1 } ) |
523 : ({32{picm_mken_ff & mask[1]}} & {28'b0 , 4'b1111 } ) |
524 : ({32{picm_mken_ff & mask[0]}} & 32'b0 ) ;
525 :
526 :
527 : assign picm_rd_data[31:0] = picm_bypass_ff ? picm_wr_data_ff[31:0] : picm_rd_data_in[31:0] ;
528 :
529 479024 : logic [14:0] address;
530 :
531 : assign address[14:0] = picm_raddr_ff[14:0];
532 :
533 : `include "pic_map_auto.h"
534 :
535 : endmodule
536 :
537 :
538 : module el2_cmp_and_mux #(parameter ID_BITS=8,
539 : INTPRIORITY_BITS = 4)
540 : (
541 1720 : input logic [ID_BITS-1:0] a_id,
542 2823 : input logic [INTPRIORITY_BITS-1:0] a_priority,
543 :
544 344 : input logic [ID_BITS-1:0] b_id,
545 2934 : input logic [INTPRIORITY_BITS-1:0] b_priority,
546 :
547 1720 : output logic [ID_BITS-1:0] out_id,
548 3983 : output logic [INTPRIORITY_BITS-1:0] out_priority
549 :
550 : );
551 :
552 5981 : logic a_is_lt_b ;
553 :
554 : assign a_is_lt_b = ( a_priority[INTPRIORITY_BITS-1:0] < b_priority[INTPRIORITY_BITS-1:0] ) ;
555 :
556 : assign out_id[ID_BITS-1:0] = a_is_lt_b ? b_id[ID_BITS-1:0] :
557 : a_id[ID_BITS-1:0] ;
558 : assign out_priority[INTPRIORITY_BITS-1:0] = a_is_lt_b ? b_priority[INTPRIORITY_BITS-1:0] :
559 : a_priority[INTPRIORITY_BITS-1:0] ;
560 : endmodule // cmp_and_mux
561 :
562 :
563 : module el2_configurable_gw (
564 3127890 : input logic gw_clk,
565 1750929834 : input logic rawclk,
566 10807 : input logic clken,
567 10642 : input logic rst_l,
568 3439 : input logic extintsrc_req ,
569 763 : input logic meigwctrl_polarity ,
570 842 : input logic meigwctrl_type ,
571 2500 : input logic meigwclr ,
572 :
573 3085 : output logic extintsrc_req_config
574 : );
575 :
576 :
577 2524 : logic gw_int_pending_in, gw_int_pending, extintsrc_req_sync;
578 :
579 : rvsyncss_fpga #(1) sync_inst (
580 : .dout (extintsrc_req_sync),
581 : .din (extintsrc_req),
582 : .*) ;
583 :
584 :
585 : assign gw_int_pending_in = (extintsrc_req_sync ^ meigwctrl_polarity) | (gw_int_pending & ~meigwclr) ;
586 : rvdff_fpga #(1) int_pend_ff (.*, .clk(gw_clk), .rawclk(rawclk), .clken(clken), .din (gw_int_pending_in), .dout(gw_int_pending));
587 :
588 :
589 : assign extintsrc_req_config = meigwctrl_type ? ((extintsrc_req_sync ^ meigwctrl_polarity) | gw_int_pending) : (extintsrc_req_sync ^ meigwctrl_polarity) ;
590 :
591 : endmodule // configurable_gw
592 :
593 :
594 :
595 :
596 :
597 :
598 :
599 :
600 :
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