Line data Source code
1 : // SPDX-License-Identifier: Apache-2.0
2 : // Copyright 2020 Western Digital Corporation or its affiliates.
3 : //
4 : // Licensed under the Apache License, Version 2.0 (the "License");
5 : // you may not use this file except in compliance with the License.
6 : // You may obtain a copy of the License at
7 : //
8 : // http://www.apache.org/licenses/LICENSE-2.0
9 : //
10 : // Unless required by applicable law or agreed to in writing, software
11 : // distributed under the License is distributed on an "AS IS" BASIS,
12 : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 : // See the License for the specific language governing permissions and
14 : // limitations under the License.
15 :
16 : //********************************************************************************
17 : // $Id$
18 : //
19 : // Function: Top level VeeR core file
20 : // Comments:
21 : //
22 : //********************************************************************************
23 :
24 : module el2_dma_ctrl
25 : import el2_pkg::*;
26 : #(
27 : `include "el2_param.vh"
28 : )(
29 61089987 : input logic clk,
30 61089987 : input logic free_clk,
31 340 : input logic rst_l,
32 324 : input logic dma_bus_clk_en, // slave bus clock enable
33 0 : input logic clk_override,
34 0 : input logic scan_mode,
35 :
36 : // Debug signals
37 45 : input logic [31:0] dbg_cmd_addr,
38 147 : input logic [31:0] dbg_cmd_wrdata,
39 1400 : input logic dbg_cmd_valid,
40 51 : input logic dbg_cmd_write, // 1: write command, 0: read_command
41 8 : input logic [1:0] dbg_cmd_type, // 0:gpr 1:csr 2: memory
42 3 : input logic [1:0] dbg_cmd_size, // size of the abstract mem access debug command
43 :
44 1226 : input logic dbg_dma_bubble, // Debug needs a bubble to send a valid
45 2144 : output logic dma_dbg_ready, // DMA is ready to accept debug request
46 :
47 1400 : output logic dma_dbg_cmd_done,
48 200 : output logic dma_dbg_cmd_fail,
49 1225 : output logic [31:0] dma_dbg_rddata,
50 :
51 : // Core side signals
52 1292 : output logic dma_dccm_req, // DMA dccm request (only one of dccm/iccm will be set)
53 1380 : output logic dma_iccm_req, // DMA iccm request
54 611 : output logic [2:0] dma_mem_tag, // DMA Buffer entry number
55 291 : output logic [31:0] dma_mem_addr, // DMA request address
56 64 : output logic [2:0] dma_mem_sz, // DMA request size
57 272 : output logic dma_mem_write, // DMA write to dccm/iccm
58 909 : output logic [63:0] dma_mem_wdata, // DMA write data
59 :
60 684 : input logic dccm_dma_rvalid, // dccm data valid for DMA read
61 31 : input logic dccm_dma_ecc_error, // ECC error on DMA read
62 159 : input logic [2:0] dccm_dma_rtag, // Tag of the DMA req
63 39690 : input logic [63:0] dccm_dma_rdata, // dccm data for DMA read
64 716 : input logic iccm_dma_rvalid, // iccm data valid for DMA read
65 30 : input logic iccm_dma_ecc_error, // ECC error on DMA read
66 140 : input logic [2:0] iccm_dma_rtag, // Tag of the DMA req
67 146 : input logic [63:0] iccm_dma_rdata, // iccm data for DMA read
68 :
69 2509 : output logic dma_active, // DMA is busy
70 1240 : output logic dma_dccm_stall_any, // stall dccm pipe (bubble) so that DMA can proceed
71 1298 : output logic dma_iccm_stall_any, // stall iccm pipe (bubble) so that DMA can proceed
72 2214730 : input logic dccm_ready, // dccm ready to accept DMA request
73 636470 : input logic iccm_ready, // iccm ready to accept DMA request
74 321 : input logic [2:0] dec_tlu_dma_qos_prty, // DMA QoS priority coming from MFDC [18:15]
75 :
76 : // PMU signals
77 710 : output logic dma_pmu_dccm_read,
78 582 : output logic dma_pmu_dccm_write,
79 1450 : output logic dma_pmu_any_read,
80 1206 : output logic dma_pmu_any_write,
81 :
82 : // AXI Write Channels
83 760 : input logic dma_axi_awvalid,
84 1018 : output logic dma_axi_awready,
85 327 : input logic [pt.DMA_BUS_TAG-1:0] dma_axi_awid,
86 410 : input logic [31:0] dma_axi_awaddr,
87 2 : input logic [2:0] dma_axi_awsize,
88 :
89 :
90 760 : input logic dma_axi_wvalid,
91 522 : output logic dma_axi_wready,
92 29907 : input logic [63:0] dma_axi_wdata,
93 185564 : input logic [7:0] dma_axi_wstrb,
94 :
95 658 : output logic dma_axi_bvalid,
96 92 : input logic dma_axi_bready,
97 500 : output logic [1:0] dma_axi_bresp,
98 426 : output logic [pt.DMA_BUS_TAG-1:0] dma_axi_bid,
99 :
100 : // AXI Read Channels
101 906 : input logic dma_axi_arvalid,
102 625 : output logic dma_axi_arready,
103 3 : input logic [pt.DMA_BUS_TAG-1:0] dma_axi_arid,
104 414 : input logic [31:0] dma_axi_araddr,
105 3 : input logic [2:0] dma_axi_arsize,
106 :
107 906 : output logic dma_axi_rvalid,
108 924 : input logic dma_axi_rready,
109 426 : output logic [pt.DMA_BUS_TAG-1:0] dma_axi_rid,
110 1220 : output logic [63:0] dma_axi_rdata,
111 500 : output logic [1:0] dma_axi_rresp,
112 325 : output logic dma_axi_rlast
113 : );
114 :
115 :
116 : localparam DEPTH = pt.DMA_BUF_DEPTH;
117 : localparam DEPTH_PTR = $clog2(DEPTH);
118 : localparam NACK_COUNT = 7;
119 :
120 610 : logic [DEPTH-1:0] fifo_valid;
121 80 : logic [DEPTH-1:0][1:0] fifo_error;
122 94 : logic [DEPTH-1:0] fifo_error_bus;
123 280 : logic [DEPTH-1:0] fifo_rpend;
124 610 : logic [DEPTH-1:0] fifo_done; // DMA trxn is done in core
125 610 : logic [DEPTH-1:0] fifo_done_bus; // DMA trxn is done in core but synced to bus clock
126 37 : logic [DEPTH-1:0][31:0] fifo_addr;
127 12 : logic [DEPTH-1:0][2:0] fifo_sz;
128 7 : logic [DEPTH-1:0][7:0] fifo_byteen;
129 30 : logic [DEPTH-1:0] fifo_write;
130 0 : logic [DEPTH-1:0] fifo_posted_write;
131 11 : logic [DEPTH-1:0] fifo_dbg;
132 : logic [DEPTH-1:0][63:0] fifo_data;
133 66 : logic [DEPTH-1:0][pt.DMA_BUS_TAG-1:0] fifo_tag;
134 0 : logic [DEPTH-1:0][pt.DMA_BUS_ID-1:0] fifo_mid;
135 0 : logic [DEPTH-1:0][pt.DMA_BUS_PRTY-1:0] fifo_prty;
136 :
137 890 : logic [DEPTH-1:0] fifo_cmd_en;
138 730 : logic [DEPTH-1:0] fifo_data_en;
139 280 : logic [DEPTH-1:0] fifo_pend_en;
140 612 : logic [DEPTH-1:0] fifo_done_en;
141 612 : logic [DEPTH-1:0] fifo_done_bus_en;
142 94 : logic [DEPTH-1:0] fifo_error_en;
143 94 : logic [DEPTH-1:0] fifo_error_bus_en;
144 610 : logic [DEPTH-1:0] fifo_reset;
145 400 : logic [DEPTH-1:0][1:0] fifo_error_in;
146 : logic [DEPTH-1:0][63:0] fifo_data_in;
147 :
148 1469 : logic fifo_write_in;
149 0 : logic fifo_posted_write_in;
150 1400 : logic fifo_dbg_in;
151 1038 : logic [31:0] fifo_addr_in;
152 606 : logic [2:0] fifo_sz_in;
153 34 : logic [7:0] fifo_byteen_in;
154 :
155 611 : logic [DEPTH_PTR-1:0] RspPtr, NxtRspPtr;
156 611 : logic [DEPTH_PTR-1:0] WrPtr, NxtWrPtr;
157 611 : logic [DEPTH_PTR-1:0] RdPtr, NxtRdPtr;
158 2964 : logic WrPtrEn, RdPtrEn, RspPtrEn;
159 :
160 149 : logic [1:0] dma_dbg_sz;
161 0 : logic [1:0] dma_dbg_addr;
162 1237 : logic [31:0] dma_dbg_mem_rddata;
163 147 : logic [31:0] dma_dbg_mem_wrdata;
164 200 : logic dma_dbg_cmd_error;
165 1400 : logic dma_dbg_cmd_done_q;
166 :
167 3221 : logic fifo_full, fifo_full_spec, fifo_empty;
168 0 : logic dma_address_error, dma_alignment_error;
169 0 : logic [3:0] num_fifo_vld;
170 2548 : logic dma_mem_req;
171 291 : logic [31:0] dma_mem_addr_int;
172 64 : logic [2:0] dma_mem_sz_int;
173 54 : logic [7:0] dma_mem_byteen;
174 524 : logic dma_mem_addr_in_dccm;
175 553 : logic dma_mem_addr_in_iccm;
176 0 : logic dma_mem_addr_in_pic;
177 550 : logic dma_mem_addr_in_pic_region_nc;
178 550 : logic dma_mem_addr_in_dccm_region_nc;
179 589 : logic dma_mem_addr_in_iccm_region_nc;
180 :
181 321 : logic [2:0] dma_nack_count, dma_nack_count_d, dma_nack_count_csr;
182 :
183 3065 : logic dma_buffer_c1_clken;
184 2873 : logic dma_free_clken;
185 61058224 : logic dma_buffer_c1_clk;
186 61077172 : logic dma_free_clk;
187 44310 : logic dma_bus_clk;
188 :
189 1564 : logic bus_rsp_valid, bus_rsp_sent;
190 1664 : logic bus_cmd_valid, bus_cmd_sent;
191 0 : logic bus_cmd_write, bus_cmd_posted_write;
192 34 : logic [7:0] bus_cmd_byteen;
193 606 : logic [2:0] bus_cmd_sz;
194 368 : logic [31:0] bus_cmd_addr;
195 156 : logic [63:0] bus_cmd_wdata;
196 372 : logic [pt.DMA_BUS_TAG-1:0] bus_cmd_tag;
197 0 : logic [pt.DMA_BUS_ID-1:0] bus_cmd_mid;
198 0 : logic [pt.DMA_BUS_PRTY-1:0] bus_cmd_prty;
199 0 : logic bus_posted_write_done;
200 :
201 0 : logic fifo_full_spec_bus;
202 1230 : logic dbg_dma_bubble_bus;
203 0 : logic stall_dma_in;
204 1555 : logic dma_fifo_ready;
205 :
206 760 : logic wrbuf_en, wrbuf_data_en;
207 758 : logic wrbuf_cmd_sent, wrbuf_rst, wrbuf_data_rst;
208 759 : logic wrbuf_vld, wrbuf_data_vld;
209 327 : logic [pt.DMA_BUS_TAG-1:0] wrbuf_tag;
210 6 : logic [2:0] wrbuf_sz;
211 23 : logic [31:0] wrbuf_addr;
212 156 : logic [63:0] wrbuf_data;
213 34 : logic [7:0] wrbuf_byteen;
214 :
215 906 : logic rdbuf_en;
216 906 : logic rdbuf_cmd_sent, rdbuf_rst;
217 906 : logic rdbuf_vld;
218 7 : logic [pt.DMA_BUS_TAG-1:0] rdbuf_tag;
219 7 : logic [2:0] rdbuf_sz;
220 27 : logic [31:0] rdbuf_addr;
221 :
222 838 : logic axi_mstr_prty_in, axi_mstr_prty_en;
223 832 : logic axi_mstr_priority;
224 759 : logic axi_mstr_sel;
225 :
226 0 : logic axi_rsp_valid, axi_rsp_sent;
227 272 : logic axi_rsp_write;
228 426 : logic [pt.DMA_BUS_TAG-1:0] axi_rsp_tag;
229 500 : logic [1:0] axi_rsp_error;
230 1220 : logic [63:0] axi_rsp_rdata;
231 :
232 : //------------------------LOGIC STARTS HERE---------------------------------
233 :
234 : // FIFO inputs
235 : assign fifo_addr_in[31:0] = dbg_cmd_valid ? dbg_cmd_addr[31:0] : bus_cmd_addr[31:0];
236 : assign fifo_byteen_in[7:0] = {8{~dbg_cmd_valid}} & bus_cmd_byteen[7:0]; // Byte enable is used only for bus requests
237 : assign fifo_sz_in[2:0] = dbg_cmd_valid ? {1'b0,dbg_cmd_size[1:0]} : bus_cmd_sz[2:0];
238 : assign fifo_write_in = dbg_cmd_valid ? dbg_cmd_write : bus_cmd_write;
239 : assign fifo_posted_write_in = ~dbg_cmd_valid & bus_cmd_posted_write;
240 : assign fifo_dbg_in = dbg_cmd_valid;
241 :
242 : for (genvar i=0 ;i<DEPTH; i++) begin: GenFifo
243 : assign fifo_cmd_en[i] = ((bus_cmd_sent & dma_bus_clk_en) | (dbg_cmd_valid & dbg_cmd_type[1])) & (i == WrPtr[DEPTH_PTR-1:0]);
244 : assign fifo_data_en[i] = (((bus_cmd_sent & fifo_write_in & dma_bus_clk_en) | (dbg_cmd_valid & dbg_cmd_type[1] & dbg_cmd_write)) & (i == WrPtr[DEPTH_PTR-1:0])) |
245 : ((dma_address_error | dma_alignment_error) & (i == RdPtr[DEPTH_PTR-1:0])) |
246 : (dccm_dma_rvalid & (i == DEPTH_PTR'(dccm_dma_rtag[2:0]))) |
247 : (iccm_dma_rvalid & (i == DEPTH_PTR'(iccm_dma_rtag[2:0])));
248 : assign fifo_pend_en[i] = (dma_dccm_req | dma_iccm_req) & ~dma_mem_write & (i == RdPtr[DEPTH_PTR-1:0]);
249 : assign fifo_error_en[i] = ((dma_address_error | dma_alignment_error | dma_dbg_cmd_error) & (i == RdPtr[DEPTH_PTR-1:0])) |
250 : ((dccm_dma_rvalid & dccm_dma_ecc_error) & (i == DEPTH_PTR'(dccm_dma_rtag[2:0]))) |
251 : ((iccm_dma_rvalid & iccm_dma_ecc_error) & (i == DEPTH_PTR'(iccm_dma_rtag[2:0])));
252 : assign fifo_error_bus_en[i] = (((|fifo_error_in[i][1:0]) & fifo_error_en[i]) | (|fifo_error[i])) & dma_bus_clk_en;
253 : assign fifo_done_en[i] = ((|fifo_error[i] | fifo_error_en[i] | ((dma_dccm_req | dma_iccm_req) & dma_mem_write)) & (i == RdPtr[DEPTH_PTR-1:0])) |
254 : (dccm_dma_rvalid & (i == DEPTH_PTR'(dccm_dma_rtag[2:0]))) |
255 : (iccm_dma_rvalid & (i == DEPTH_PTR'(iccm_dma_rtag[2:0])));
256 : assign fifo_done_bus_en[i] = (fifo_done_en[i] | fifo_done[i]) & dma_bus_clk_en;
257 : assign fifo_reset[i] = (((bus_rsp_sent | bus_posted_write_done) & dma_bus_clk_en) | dma_dbg_cmd_done) & (i == RspPtr[DEPTH_PTR-1:0]);
258 : assign fifo_error_in[i] = (dccm_dma_rvalid & (i == DEPTH_PTR'(dccm_dma_rtag[2:0]))) ? {1'b0,dccm_dma_ecc_error} : (iccm_dma_rvalid & (i == DEPTH_PTR'(iccm_dma_rtag[2:0]))) ? {1'b0,iccm_dma_ecc_error} :
259 : {(dma_address_error | dma_alignment_error | dma_dbg_cmd_error), dma_alignment_error};
260 : assign fifo_data_in[i] = (fifo_error_en[i] & (|fifo_error_in[i])) ? {32'b0,fifo_addr[i]} :
261 : ((dccm_dma_rvalid & (i == DEPTH_PTR'(dccm_dma_rtag[2:0]))) ? dccm_dma_rdata[63:0] : (iccm_dma_rvalid & (i == DEPTH_PTR'(iccm_dma_rtag[2:0]))) ? iccm_dma_rdata[63:0] :
262 : (dbg_cmd_valid ? {2{dma_dbg_mem_wrdata[31:0]}} : bus_cmd_wdata[63:0]));
263 :
264 : rvdffsc #(1) fifo_valid_dff (.din(1'b1), .dout(fifo_valid[i]), .en(fifo_cmd_en[i]), .clear(fifo_reset[i]), .clk(dma_free_clk), .*);
265 : rvdffsc #(2) fifo_error_dff (.din(fifo_error_in[i]), .dout(fifo_error[i]), .en(fifo_error_en[i]), .clear(fifo_reset[i]), .clk(dma_free_clk), .*);
266 : rvdffsc #(1) fifo_error_bus_dff (.din(1'b1), .dout(fifo_error_bus[i]), .en(fifo_error_bus_en[i]), .clear(fifo_reset[i]), .clk(dma_free_clk), .*);
267 : rvdffsc #(1) fifo_rpend_dff (.din(1'b1), .dout(fifo_rpend[i]), .en(fifo_pend_en[i]), .clear(fifo_reset[i]), .clk(dma_free_clk), .*);
268 : rvdffsc #(1) fifo_done_dff (.din(1'b1), .dout(fifo_done[i]), .en(fifo_done_en[i]), .clear(fifo_reset[i]), .clk(dma_free_clk), .*);
269 : rvdffsc #(1) fifo_done_bus_dff (.din(1'b1), .dout(fifo_done_bus[i]), .en(fifo_done_bus_en[i]), .clear(fifo_reset[i]), .clk(dma_free_clk), .*);
270 : rvdffe #(32) fifo_addr_dff (.din(fifo_addr_in[31:0]), .dout(fifo_addr[i]), .en(fifo_cmd_en[i]), .*);
271 : rvdffs #(3) fifo_sz_dff (.din(fifo_sz_in[2:0]), .dout(fifo_sz[i]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
272 : rvdffs #(8) fifo_byteen_dff (.din(fifo_byteen_in[7:0]), .dout(fifo_byteen[i]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
273 : rvdffs #(1) fifo_write_dff (.din(fifo_write_in), .dout(fifo_write[i]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
274 : rvdffs #(1) fifo_posted_write_dff (.din(fifo_posted_write_in), .dout(fifo_posted_write[i]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
275 : rvdffs #(1) fifo_dbg_dff (.din(fifo_dbg_in), .dout(fifo_dbg[i]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
276 : rvdffe #(64) fifo_data_dff (.din(fifo_data_in[i]), .dout(fifo_data[i]), .en(fifo_data_en[i]), .*);
277 : rvdffs #(pt.DMA_BUS_TAG) fifo_tag_dff(.din(bus_cmd_tag[pt.DMA_BUS_TAG-1:0]), .dout(fifo_tag[i][pt.DMA_BUS_TAG-1:0]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
278 : rvdffs #(pt.DMA_BUS_ID) fifo_mid_dff(.din(bus_cmd_mid[pt.DMA_BUS_ID-1:0]), .dout(fifo_mid[i][pt.DMA_BUS_ID-1:0]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
279 : rvdffs #(pt.DMA_BUS_PRTY) fifo_prty_dff(.din(bus_cmd_prty[pt.DMA_BUS_PRTY-1:0]), .dout(fifo_prty[i][pt.DMA_BUS_PRTY-1:0]), .en(fifo_cmd_en[i]), .clk(dma_buffer_c1_clk), .*);
280 : end
281 :
282 : // Pointer logic
283 : assign NxtWrPtr[DEPTH_PTR-1:0] = (WrPtr[DEPTH_PTR-1:0] == (DEPTH-1)) ? '0 : WrPtr[DEPTH_PTR-1:0] + 1'b1;
284 : assign NxtRdPtr[DEPTH_PTR-1:0] = (RdPtr[DEPTH_PTR-1:0] == (DEPTH-1)) ? '0 : RdPtr[DEPTH_PTR-1:0] + 1'b1;
285 : assign NxtRspPtr[DEPTH_PTR-1:0] = (RspPtr[DEPTH_PTR-1:0] == (DEPTH-1)) ? '0 : RspPtr[DEPTH_PTR-1:0] + 1'b1;
286 :
287 : assign WrPtrEn = |fifo_cmd_en[DEPTH-1:0];
288 : assign RdPtrEn = dma_dccm_req | dma_iccm_req | (dma_address_error | dma_alignment_error | dma_dbg_cmd_error);
289 : assign RspPtrEn = (dma_dbg_cmd_done | (bus_rsp_sent | bus_posted_write_done) & dma_bus_clk_en);
290 :
291 : rvdffs #(DEPTH_PTR) WrPtr_dff(.din(NxtWrPtr[DEPTH_PTR-1:0]), .dout(WrPtr[DEPTH_PTR-1:0]), .en(WrPtrEn), .clk(dma_free_clk), .*);
292 : rvdffs #(DEPTH_PTR) RdPtr_dff(.din(NxtRdPtr[DEPTH_PTR-1:0]), .dout(RdPtr[DEPTH_PTR-1:0]), .en(RdPtrEn), .clk(dma_free_clk), .*);
293 : rvdffs #(DEPTH_PTR) RspPtr_dff(.din(NxtRspPtr[DEPTH_PTR-1:0]), .dout(RspPtr[DEPTH_PTR-1:0]), .en(RspPtrEn), .clk(dma_free_clk), .*);
294 :
295 : // Miscellaneous signals
296 : assign fifo_full = fifo_full_spec_bus;
297 :
298 325 : always_comb begin
299 325 : num_fifo_vld[3:0] = {3'b0,bus_cmd_sent} - {3'b0,bus_rsp_sent};
300 325 : for (int i=0; i<DEPTH; i++) begin
301 1625 : num_fifo_vld[3:0] += {3'b0,fifo_valid[i]};
302 : end
303 : end
304 : assign fifo_full_spec = (num_fifo_vld[3:0] >= DEPTH);
305 :
306 : assign dma_fifo_ready = ~(fifo_full | dbg_dma_bubble_bus);
307 :
308 : // Error logic
309 : assign dma_address_error = fifo_valid[RdPtr] & ~fifo_done[RdPtr] & ~fifo_dbg[RdPtr] & (~(dma_mem_addr_in_dccm | dma_mem_addr_in_iccm)); // request not for ICCM or DCCM
310 : assign dma_alignment_error = fifo_valid[RdPtr] & ~fifo_done[RdPtr] & ~fifo_dbg[RdPtr] & ~dma_address_error &
311 : (((dma_mem_sz_int[2:0] == 3'h1) & dma_mem_addr_int[0]) | // HW size but unaligned
312 : ((dma_mem_sz_int[2:0] == 3'h2) & (|dma_mem_addr_int[1:0])) | // W size but unaligned
313 : ((dma_mem_sz_int[2:0] == 3'h3) & (|dma_mem_addr_int[2:0])) | // DW size but unaligned
314 : (dma_mem_addr_in_iccm & ~((dma_mem_sz_int[1:0] == 2'b10) | (dma_mem_sz_int[1:0] == 2'b11))) | // ICCM access not word size
315 : (dma_mem_addr_in_dccm & dma_mem_write & ~((dma_mem_sz_int[1:0] == 2'b10) | (dma_mem_sz_int[1:0] == 2'b11))) | // DCCM write not word size
316 : (dma_mem_write & (dma_mem_sz_int[2:0] == 3'h2) & (dma_mem_addr_int[2:0] == 3'h0) & (dma_mem_byteen[3:0] != 4'hf)) | // Write byte enables not aligned for word store
317 : (dma_mem_write & (dma_mem_sz_int[2:0] == 3'h2) & (dma_mem_addr_int[2:0] == 3'h4) & (dma_mem_byteen[7:4] != 4'hf)) | // Write byte enables not aligned for word store
318 : (dma_mem_write & (dma_mem_sz_int[2:0] == 3'h3) & ~((dma_mem_byteen[7:0] == 8'h0f) | (dma_mem_byteen[7:0] == 8'hf0) | (dma_mem_byteen[7:0] == 8'hff)))); // Write byte enables not aligned for dword store
319 :
320 :
321 : //Dbg outputs
322 : assign dma_dbg_ready = fifo_empty & dbg_dma_bubble;
323 : assign dma_dbg_cmd_done = (fifo_valid[RspPtr] & fifo_dbg[RspPtr] & fifo_done[RspPtr]);
324 : assign dma_dbg_cmd_fail = (|fifo_error[RspPtr] & dma_dbg_cmd_done) ;
325 :
326 : assign dma_dbg_sz[1:0] = fifo_sz[RspPtr][1:0];
327 : assign dma_dbg_addr[1:0] = fifo_addr[RspPtr][1:0];
328 : assign dma_dbg_mem_rddata[31:0] = fifo_addr[RspPtr][2] ? fifo_data[RspPtr][63:32] : fifo_data[RspPtr][31:0];
329 : assign dma_dbg_rddata[31:0] = ({32{(dma_dbg_sz[1:0] == 2'h0)}} & ((dma_dbg_mem_rddata[31:0] >> 8*dma_dbg_addr[1:0]) & 32'hff)) |
330 : ({32{(dma_dbg_sz[1:0] == 2'h1)}} & ((dma_dbg_mem_rddata[31:0] >> 16*dma_dbg_addr[1]) & 32'hffff)) |
331 : ({32{(dma_dbg_sz[1:0] == 2'h2)}} & dma_dbg_mem_rddata[31:0]);
332 :
333 : assign dma_dbg_cmd_error = fifo_valid[RdPtr] & ~fifo_done[RdPtr] & fifo_dbg[RdPtr] &
334 : ((~(dma_mem_addr_in_dccm | dma_mem_addr_in_iccm | dma_mem_addr_in_pic)) | // Address outside of ICCM/DCCM/PIC
335 : ((dma_mem_addr_in_iccm | dma_mem_addr_in_pic) & (dma_mem_sz_int[1:0] != 2'b10))); // Only word accesses allowed for ICCM/PIC
336 :
337 : assign dma_dbg_mem_wrdata[31:0] = ({32{dbg_cmd_size[1:0] == 2'h0}} & {4{dbg_cmd_wrdata[7:0]}}) |
338 : ({32{dbg_cmd_size[1:0] == 2'h1}} & {2{dbg_cmd_wrdata[15:0]}}) |
339 : ({32{dbg_cmd_size[1:0] == 2'h2}} & dbg_cmd_wrdata[31:0]);
340 :
341 : // Block the decode if fifo full
342 : assign dma_dccm_stall_any = dma_mem_req & (dma_mem_addr_in_dccm | dma_mem_addr_in_pic) & (dma_nack_count >= dma_nack_count_csr);
343 : assign dma_iccm_stall_any = dma_mem_req & dma_mem_addr_in_iccm & (dma_nack_count >= dma_nack_count_csr);
344 :
345 : // Used to indicate ready to debug
346 : assign fifo_empty = ~((|(fifo_valid[DEPTH-1:0])) | bus_cmd_sent);
347 :
348 : // Nack counter, stall the lsu pipe if 7 nacks
349 : assign dma_nack_count_csr[2:0] = dec_tlu_dma_qos_prty[2:0];
350 : assign dma_nack_count_d[2:0] = (dma_nack_count[2:0] >= dma_nack_count_csr[2:0]) ? ({3{~(dma_dccm_req | dma_iccm_req)}} & dma_nack_count[2:0]) :
351 : (dma_mem_req & ~(dma_dccm_req | dma_iccm_req)) ? (dma_nack_count[2:0] + 1'b1) : 3'b0;
352 :
353 : rvdffs #(3) nack_count_dff(.din(dma_nack_count_d[2:0]), .dout(dma_nack_count[2:0]), .en(dma_mem_req), .clk(dma_free_clk), .*);
354 :
355 : // Core outputs
356 : assign dma_mem_req = fifo_valid[RdPtr] & ~fifo_rpend[RdPtr] & ~fifo_done[RdPtr] & ~(dma_address_error | dma_alignment_error | dma_dbg_cmd_error);
357 : assign dma_dccm_req = dma_mem_req & (dma_mem_addr_in_dccm | dma_mem_addr_in_pic) & dccm_ready;
358 : assign dma_iccm_req = dma_mem_req & dma_mem_addr_in_iccm & iccm_ready;
359 : assign dma_mem_tag[2:0] = 3'(RdPtr);
360 : assign dma_mem_addr_int[31:0] = fifo_addr[RdPtr];
361 : assign dma_mem_sz_int[2:0] = fifo_sz[RdPtr];
362 : assign dma_mem_addr[31:0] = (dma_mem_write & ~fifo_dbg[RdPtr] & (dma_mem_byteen[7:0] == 8'hf0)) ? {dma_mem_addr_int[31:3],1'b1,dma_mem_addr_int[1:0]} : dma_mem_addr_int[31:0];
363 : assign dma_mem_sz[2:0] = (dma_mem_write & ~fifo_dbg[RdPtr] & ((dma_mem_byteen[7:0] == 8'h0f) | (dma_mem_byteen[7:0] == 8'hf0))) ? 3'h2 : dma_mem_sz_int[2:0];
364 : assign dma_mem_byteen[7:0] = fifo_byteen[RdPtr];
365 : assign dma_mem_write = fifo_write[RdPtr];
366 : assign dma_mem_wdata[63:0] = fifo_data[RdPtr];
367 :
368 : // PMU outputs
369 : assign dma_pmu_dccm_read = dma_dccm_req & ~dma_mem_write;
370 : assign dma_pmu_dccm_write = dma_dccm_req & dma_mem_write;
371 : assign dma_pmu_any_read = (dma_dccm_req | dma_iccm_req) & ~dma_mem_write;
372 : assign dma_pmu_any_write = (dma_dccm_req | dma_iccm_req) & dma_mem_write;
373 :
374 : // Address check dccm
375 : if (pt.DCCM_ENABLE) begin: Gen_dccm_enable
376 : rvrangecheck #(.CCM_SADR(pt.DCCM_SADR),
377 : .CCM_SIZE(pt.DCCM_SIZE)) addr_dccm_rangecheck (
378 : .addr(dma_mem_addr_int[31:0]),
379 : .in_range(dma_mem_addr_in_dccm),
380 : .in_region(dma_mem_addr_in_dccm_region_nc)
381 : );
382 : end else begin: Gen_dccm_disable
383 : assign dma_mem_addr_in_dccm = '0;
384 : assign dma_mem_addr_in_dccm_region_nc = '0;
385 : end // else: !if(pt.ICCM_ENABLE)
386 :
387 : // Address check iccm
388 : if (pt.ICCM_ENABLE) begin: Gen_iccm_enable
389 : rvrangecheck #(.CCM_SADR(pt.ICCM_SADR),
390 : .CCM_SIZE(pt.ICCM_SIZE)) addr_iccm_rangecheck (
391 : .addr(dma_mem_addr_int[31:0]),
392 : .in_range(dma_mem_addr_in_iccm),
393 : .in_region(dma_mem_addr_in_iccm_region_nc)
394 : );
395 : end else begin: Gen_iccm_disable
396 : assign dma_mem_addr_in_iccm = '0;
397 : assign dma_mem_addr_in_iccm_region_nc = '0;
398 : end // else: !if(pt.ICCM_ENABLE)
399 :
400 :
401 : // PIC memory address check
402 : rvrangecheck #(.CCM_SADR(pt.PIC_BASE_ADDR),
403 : .CCM_SIZE(pt.PIC_SIZE)) addr_pic_rangecheck (
404 : .addr(dma_mem_addr_int[31:0]),
405 : .in_range(dma_mem_addr_in_pic),
406 : .in_region(dma_mem_addr_in_pic_region_nc)
407 : );
408 :
409 : // Inputs
410 : rvdff_fpga #(1) fifo_full_bus_ff (.din(fifo_full_spec), .dout(fifo_full_spec_bus), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
411 : rvdff_fpga #(1) dbg_dma_bubble_ff (.din(dbg_dma_bubble), .dout(dbg_dma_bubble_bus), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
412 : rvdff #(1) dma_dbg_cmd_doneff (.din(dma_dbg_cmd_done), .dout(dma_dbg_cmd_done_q), .clk(free_clk), .*);
413 :
414 : // Clock Gating logic
415 : assign dma_buffer_c1_clken = (bus_cmd_valid & dma_bus_clk_en) | dbg_cmd_valid | clk_override;
416 : assign dma_free_clken = (bus_cmd_valid | bus_rsp_valid | dbg_cmd_valid | dma_dbg_cmd_done | dma_dbg_cmd_done_q | (|fifo_valid[DEPTH-1:0]) | clk_override);
417 :
418 : rvoclkhdr dma_buffer_c1cgc ( .en(dma_buffer_c1_clken), .l1clk(dma_buffer_c1_clk), .* );
419 : rvoclkhdr dma_free_cgc (.en(dma_free_clken), .l1clk(dma_free_clk), .*);
420 :
421 : `ifdef RV_FPGA_OPTIMIZE
422 : assign dma_bus_clk = 1'b0;
423 : `else
424 : rvclkhdr dma_bus_cgc (.en(dma_bus_clk_en), .l1clk(dma_bus_clk), .*);
425 : `endif
426 :
427 : // Write channel buffer
428 : assign wrbuf_en = dma_axi_awvalid & dma_axi_awready;
429 : assign wrbuf_data_en = dma_axi_wvalid & dma_axi_wready;
430 : assign wrbuf_cmd_sent = bus_cmd_sent & bus_cmd_write;
431 : assign wrbuf_rst = wrbuf_cmd_sent & ~wrbuf_en;
432 : assign wrbuf_data_rst = wrbuf_cmd_sent & ~wrbuf_data_en;
433 :
434 : rvdffsc_fpga #(.WIDTH(1)) wrbuf_vldff (.din(1'b1), .dout(wrbuf_vld), .en(wrbuf_en), .clear(wrbuf_rst), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
435 : rvdffsc_fpga #(.WIDTH(1)) wrbuf_data_vldff (.din(1'b1), .dout(wrbuf_data_vld), .en(wrbuf_data_en), .clear(wrbuf_data_rst), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
436 : rvdffs_fpga #(.WIDTH(pt.DMA_BUS_TAG)) wrbuf_tagff (.din(dma_axi_awid[pt.DMA_BUS_TAG-1:0]), .dout(wrbuf_tag[pt.DMA_BUS_TAG-1:0]), .en(wrbuf_en), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
437 : rvdffs_fpga #(.WIDTH(3)) wrbuf_szff (.din(dma_axi_awsize[2:0]), .dout(wrbuf_sz[2:0]), .en(wrbuf_en), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
438 : rvdffe #(.WIDTH(32)) wrbuf_addrff (.din(dma_axi_awaddr[31:0]), .dout(wrbuf_addr[31:0]), .en(wrbuf_en & dma_bus_clk_en), .*);
439 : rvdffe #(.WIDTH(64)) wrbuf_dataff (.din(dma_axi_wdata[63:0]), .dout(wrbuf_data[63:0]), .en(wrbuf_data_en & dma_bus_clk_en), .*);
440 : rvdffs_fpga #(.WIDTH(8)) wrbuf_byteenff (.din(dma_axi_wstrb[7:0]), .dout(wrbuf_byteen[7:0]), .en(wrbuf_data_en), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
441 :
442 : // Read channel buffer
443 : assign rdbuf_en = dma_axi_arvalid & dma_axi_arready;
444 : assign rdbuf_cmd_sent = bus_cmd_sent & ~bus_cmd_write;
445 : assign rdbuf_rst = rdbuf_cmd_sent & ~rdbuf_en;
446 :
447 : rvdffsc_fpga #(.WIDTH(1)) rdbuf_vldff (.din(1'b1), .dout(rdbuf_vld), .en(rdbuf_en), .clear(rdbuf_rst), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
448 : rvdffs_fpga #(.WIDTH(pt.DMA_BUS_TAG)) rdbuf_tagff (.din(dma_axi_arid[pt.DMA_BUS_TAG-1:0]), .dout(rdbuf_tag[pt.DMA_BUS_TAG-1:0]), .en(rdbuf_en), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
449 : rvdffs_fpga #(.WIDTH(3)) rdbuf_szff (.din(dma_axi_arsize[2:0]), .dout(rdbuf_sz[2:0]), .en(rdbuf_en), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
450 : rvdffe #(.WIDTH(32)) rdbuf_addrff (.din(dma_axi_araddr[31:0]), .dout(rdbuf_addr[31:0]), .en(rdbuf_en & dma_bus_clk_en), .*);
451 :
452 : assign dma_axi_awready = ~(wrbuf_vld & ~wrbuf_cmd_sent);
453 : assign dma_axi_wready = ~(wrbuf_data_vld & ~wrbuf_cmd_sent);
454 : assign dma_axi_arready = ~(rdbuf_vld & ~rdbuf_cmd_sent);
455 :
456 : //Generate a single request from read/write channel
457 : assign bus_cmd_valid = (wrbuf_vld & wrbuf_data_vld) | rdbuf_vld;
458 : assign bus_cmd_sent = bus_cmd_valid & dma_fifo_ready;
459 : assign bus_cmd_write = axi_mstr_sel;
460 : assign bus_cmd_posted_write = '0;
461 : assign bus_cmd_addr[31:0] = axi_mstr_sel ? wrbuf_addr[31:0] : rdbuf_addr[31:0];
462 : assign bus_cmd_sz[2:0] = axi_mstr_sel ? wrbuf_sz[2:0] : rdbuf_sz[2:0];
463 : assign bus_cmd_wdata[63:0] = wrbuf_data[63:0];
464 : assign bus_cmd_byteen[7:0] = wrbuf_byteen[7:0];
465 : assign bus_cmd_tag[pt.DMA_BUS_TAG-1:0] = axi_mstr_sel ? wrbuf_tag[pt.DMA_BUS_TAG-1:0] : rdbuf_tag[pt.DMA_BUS_TAG-1:0];
466 : assign bus_cmd_mid[pt.DMA_BUS_ID-1:0] = '0;
467 : assign bus_cmd_prty[pt.DMA_BUS_PRTY-1:0] = '0;
468 :
469 : // Sel=1 -> write has higher priority
470 : assign axi_mstr_sel = (wrbuf_vld & wrbuf_data_vld & rdbuf_vld) ? axi_mstr_priority : (wrbuf_vld & wrbuf_data_vld);
471 : assign axi_mstr_prty_in = ~axi_mstr_priority;
472 : assign axi_mstr_prty_en = bus_cmd_sent;
473 : rvdffs_fpga #(.WIDTH(1)) mstr_prtyff(.din(axi_mstr_prty_in), .dout(axi_mstr_priority), .en(axi_mstr_prty_en), .clk(dma_bus_clk), .clken(dma_bus_clk_en), .rawclk(clk), .*);
474 :
475 : assign axi_rsp_valid = fifo_valid[RspPtr] & ~fifo_dbg[RspPtr] & fifo_done_bus[RspPtr];
476 : assign axi_rsp_rdata[63:0] = fifo_data[RspPtr];
477 : assign axi_rsp_write = fifo_write[RspPtr];
478 : assign axi_rsp_error[1:0] = fifo_error[RspPtr][0] ? 2'b10 : (fifo_error[RspPtr][1] ? 2'b11 : 2'b0);
479 : assign axi_rsp_tag[pt.DMA_BUS_TAG-1:0] = fifo_tag[RspPtr];
480 :
481 : // AXI response channel signals
482 : assign dma_axi_bvalid = axi_rsp_valid & axi_rsp_write;
483 : assign dma_axi_bresp[1:0] = axi_rsp_error[1:0];
484 : assign dma_axi_bid[pt.DMA_BUS_TAG-1:0] = axi_rsp_tag[pt.DMA_BUS_TAG-1:0];
485 :
486 : assign dma_axi_rvalid = axi_rsp_valid & ~axi_rsp_write;
487 : assign dma_axi_rresp[1:0] = axi_rsp_error;
488 : assign dma_axi_rdata[63:0] = axi_rsp_rdata[63:0];
489 : assign dma_axi_rlast = 1'b1;
490 : assign dma_axi_rid[pt.DMA_BUS_TAG-1:0] = axi_rsp_tag[pt.DMA_BUS_TAG-1:0];
491 :
492 : assign bus_posted_write_done = 1'b0;
493 : assign bus_rsp_valid = (dma_axi_bvalid | dma_axi_rvalid);
494 : assign bus_rsp_sent = (dma_axi_bvalid & dma_axi_bready) | (dma_axi_rvalid & dma_axi_rready);
495 :
496 : assign dma_active = wrbuf_vld | rdbuf_vld | (|fifo_valid[DEPTH-1:0]);
497 :
498 :
499 : `ifdef RV_ASSERT_ON
500 :
501 : for (genvar i=0; i<DEPTH; i++) begin
502 : assert_fifo_done_and_novalid: assert #0 (~fifo_done[i] | fifo_valid[i]);
503 : end
504 :
505 : // Assertion to check awvalid stays stable during entire bus clock
506 : property dma_axi_awvalid_stable;
507 : @(posedge clk) disable iff(~rst_l) (dma_axi_awvalid != $past(dma_axi_awvalid)) |-> $past(dma_bus_clk_en);
508 : endproperty
509 : assert_dma_axi_awvalid_stable: assert property (dma_axi_awvalid_stable) else
510 : $display("DMA AXI awvalid changed in middle of bus clock");
511 :
512 : // Assertion to check awid stays stable during entire bus clock
513 : property dma_axi_awid_stable;
514 : @(posedge clk) disable iff(~rst_l) (dma_axi_awvalid & (dma_axi_awid[pt.DMA_BUS_TAG-1:0] != $past(dma_axi_awid[pt.DMA_BUS_TAG-1:0]))) |-> $past(dma_bus_clk_en);
515 : endproperty
516 : assert_dma_axi_awid_stable: assert property (dma_axi_awid_stable) else
517 : $display("DMA AXI awid changed in middle of bus clock");
518 :
519 : // Assertion to check awaddr stays stable during entire bus clock
520 : property dma_axi_awaddr_stable;
521 : @(posedge clk) disable iff(~rst_l) (dma_axi_awvalid & (dma_axi_awaddr[31:0] != $past(dma_axi_awaddr[31:0]))) |-> $past(dma_bus_clk_en);
522 : endproperty
523 : assert_dma_axi_awaddr_stable: assert property (dma_axi_awaddr_stable) else
524 : $display("DMA AXI awaddr changed in middle of bus clock");
525 :
526 : // Assertion to check awsize stays stable during entire bus clock
527 : property dma_axi_awsize_stable;
528 : @(posedge clk) disable iff(~rst_l) (dma_axi_awvalid & (dma_axi_awsize[2:0] != $past(dma_axi_awsize[2:0]))) |-> $past(dma_bus_clk_en);
529 : endproperty
530 : assert_dma_axi_awsize_stable: assert property (dma_axi_awsize_stable) else
531 : $display("DMA AXI awsize changed in middle of bus clock");
532 :
533 : // Assertion to check wstrb stays stable during entire bus clock
534 : property dma_axi_wstrb_stable;
535 : @(posedge clk) disable iff(~rst_l) (dma_axi_wvalid & (dma_axi_wstrb[7:0] != $past(dma_axi_wstrb[7:0]))) |-> $past(dma_bus_clk_en);
536 : endproperty
537 : assert_dma_axi_wstrb_stable: assert property (dma_axi_wstrb_stable) else
538 : $display("DMA AXI wstrb changed in middle of bus clock");
539 :
540 : // Assertion to check wdata stays stable during entire bus clock
541 : property dma_axi_wdata_stable;
542 : @(posedge clk) disable iff(~rst_l) (dma_axi_wvalid & (dma_axi_wdata[63:0] != $past(dma_axi_wdata[63:0]))) |-> $past(dma_bus_clk_en);
543 : endproperty
544 : assert_dma_axi_wdata_stable: assert property (dma_axi_wdata_stable) else
545 : $display("DMA AXI wdata changed in middle of bus clock");
546 :
547 : // Assertion to check awvalid stays stable during entire bus clock
548 : property dma_axi_arvalid_stable;
549 : @(posedge clk) disable iff(~rst_l) (dma_axi_arvalid != $past(dma_axi_arvalid)) |-> $past(dma_bus_clk_en);
550 : endproperty
551 : assert_dma_axi_arvalid_stable: assert property (dma_axi_arvalid_stable) else
552 : $display("DMA AXI awvalid changed in middle of bus clock");
553 :
554 : // Assertion to check awid stays stable during entire bus clock
555 : property dma_axi_arid_stable;
556 : @(posedge clk) disable iff(~rst_l) (dma_axi_arvalid & (dma_axi_arid[pt.DMA_BUS_TAG-1:0] != $past(dma_axi_arid[pt.DMA_BUS_TAG-1:0]))) |-> $past(dma_bus_clk_en);
557 : endproperty
558 : assert_dma_axi_arid_stable: assert property (dma_axi_arid_stable) else
559 : $display("DMA AXI awid changed in middle of bus clock");
560 :
561 : // Assertion to check awaddr stays stable during entire bus clock
562 : property dma_axi_araddr_stable;
563 : @(posedge clk) disable iff(~rst_l) (dma_axi_arvalid & (dma_axi_araddr[31:0] != $past(dma_axi_araddr[31:0]))) |-> $past(dma_bus_clk_en);
564 : endproperty
565 : assert_dma_axi_araddr_stable: assert property (dma_axi_araddr_stable) else
566 : $display("DMA AXI awaddr changed in middle of bus clock");
567 :
568 : // Assertion to check awsize stays stable during entire bus clock
569 : property dma_axi_arsize_stable;
570 : @(posedge clk) disable iff(~rst_l) (dma_axi_awvalid & (dma_axi_arsize[2:0] != $past(dma_axi_arsize[2:0]))) |-> $past(dma_bus_clk_en);
571 : endproperty
572 : assert_dma_axi_arsize_stable: assert property (dma_axi_arsize_stable) else
573 : $display("DMA AXI awsize changed in middle of bus clock");
574 :
575 : // Assertion to check bvalid stays stable during entire bus clock
576 : property dma_axi_bvalid_stable;
577 : @(posedge clk) disable iff(~rst_l) (dma_axi_bvalid != $past(dma_axi_bvalid)) |-> $past(dma_bus_clk_en);
578 : endproperty
579 : assert_dma_axi_bvalid_stable: assert property (dma_axi_bvalid_stable) else
580 : $display("DMA AXI bvalid changed in middle of bus clock");
581 :
582 : // Assertion to check bvalid stays stable if bready is low
583 : property dma_axi_bvalid_stable_till_bready;
584 : @(posedge clk) disable iff(~rst_l) (~dma_axi_bvalid && $past(dma_axi_bvalid)) |-> $past(dma_axi_bready);
585 : endproperty
586 : assert_dma_axi_bvalid_stable_till_bready: assert property (dma_axi_bvalid_stable_till_bready) else
587 : $display("DMA AXI bvalid deasserted without bready");
588 :
589 : // Assertion to check bresp stays stable during entire bus clock
590 : property dma_axi_bresp_stable;
591 : @(posedge clk) disable iff(~rst_l) (dma_axi_bvalid & (dma_axi_bresp[1:0] != $past(dma_axi_bresp[1:0]))) |-> $past(dma_bus_clk_en);
592 : endproperty
593 : assert_dma_axi_bresp_stable: assert property (dma_axi_bresp_stable) else
594 : $display("DMA AXI bresp changed in middle of bus clock");
595 :
596 : // Assertion to check bid stays stable during entire bus clock
597 : property dma_axi_bid_stable;
598 : @(posedge clk) disable iff(~rst_l) (dma_axi_bvalid & (dma_axi_bid[pt.DMA_BUS_TAG-1:0] != $past(dma_axi_bid[pt.DMA_BUS_TAG-1:0]))) |-> $past(dma_bus_clk_en);
599 : endproperty
600 : assert_dma_axi_bid_stable: assert property (dma_axi_bid_stable) else
601 : $display("DMA AXI bid changed in middle of bus clock");
602 :
603 : // Assertion to check rvalid stays stable during entire bus clock
604 : property dma_axi_rvalid_stable;
605 : @(posedge clk) disable iff(~rst_l) (dma_axi_rvalid != $past(dma_axi_rvalid)) |-> $past(dma_bus_clk_en);
606 : endproperty
607 : assert_dma_axi_rvalid_stable: assert property (dma_axi_rvalid_stable) else
608 : $display("DMA AXI bvalid changed in middle of bus clock");
609 :
610 : // Assertion to check rvalid stays stable if bready is low
611 : property dma_axi_rvalid_stable_till_ready;
612 : @(posedge clk) disable iff(~rst_l) (~dma_axi_rvalid && $past(dma_axi_rvalid)) |-> $past(dma_axi_rready);
613 : endproperty
614 : assert_dma_axi_rvalid_stable_till_ready: assert property (dma_axi_rvalid_stable_till_ready) else
615 : $display("DMA AXI bvalid changed in middle of bus clock");
616 :
617 : // Assertion to check rresp stays stable during entire bus clock
618 : property dma_axi_rresp_stable;
619 : @(posedge clk) disable iff(~rst_l) (dma_axi_rvalid & (dma_axi_rresp[1:0] != $past(dma_axi_rresp[1:0]))) |-> $past(dma_bus_clk_en);
620 : endproperty
621 : assert_dma_axi_rresp_stable: assert property (dma_axi_rresp_stable) else
622 : $display("DMA AXI bresp changed in middle of bus clock");
623 :
624 : // Assertion to check rid stays stable during entire bus clock
625 : property dma_axi_rid_stable;
626 : @(posedge clk) disable iff(~rst_l) (dma_axi_rvalid & (dma_axi_rid[pt.DMA_BUS_TAG-1:0] != $past(dma_axi_rid[pt.DMA_BUS_TAG-1:0]))) |-> $past(dma_bus_clk_en);
627 : endproperty
628 : assert_dma_axi_rid_stable: assert property (dma_axi_rid_stable) else
629 : $display("DMA AXI bid changed in middle of bus clock");
630 :
631 : // Assertion to check rdata stays stable during entire bus clock
632 : property dma_axi_rdata_stable;
633 : @(posedge clk) disable iff(~rst_l) (dma_axi_rvalid & (dma_axi_rdata[63:0] != $past(dma_axi_rdata[63:0]))) |-> $past(dma_bus_clk_en);
634 : endproperty
635 : assert_dma_axi_rdata_stable: assert property (dma_axi_rdata_stable) else
636 : $display("DMA AXI bid changed in middle of bus clock");
637 :
638 : `endif
639 :
640 : endmodule // el2_dma_ctrl
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