src: Add multicast capabilities to Snitch DMA

pulp-platform · Sep 26, 2024 · 8fe5b03 · 8fe5b03
1 parent a6b190c
commit 8fe5b03
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Showing 6 changed files with 40 additions and 27 deletions.
diff --git a/src/backend/tpl/idma_backend.sv.tpl b/src/backend/tpl/idma_backend.sv.tpl
@@ -299,6 +299,7 @@ _rsp_t ${protocol}_write_rsp_i,
         addr_t   addr;
         logic    valid;
         addr_t   base_addr;
+        addr_t   mask;
     } idma_mut_tf_t;
 
 

diff --git a/src/backend/tpl/idma_legalizer.sv.tpl b/src/backend/tpl/idma_legalizer.sv.tpl
@@ -460,14 +460,16 @@ w_num_bytes_to_pb = w_page_num_bytes_to_pb;
                 length: req_i.length,
                 addr:   req_i.src_addr,
                 valid:   1'b1,
-                base_addr: req_i.src_addr
+                base_addr: req_i.src_addr,
+                default: '0
             };
             // destination or write
             w_tf_d = '{
                 length: req_i.length,
                 addr:   req_i.dst_addr,
                 valid:   1'b1,
-                base_addr: req_i.dst_addr
+                base_addr: req_i.dst_addr,
+                mask: req_i.dst_mask
             };
             // options
             opt_tf_d = '{

diff --git a/src/db/idma_axi.yml b/src/db/idma_axi.yml
@@ -56,7 +56,7 @@ legalizer_write_meta_channel: |
         prot: opt_tf_q.dst_axi_opt.prot,
         qos: opt_tf_q.dst_axi_opt.qos,
         region: opt_tf_q.dst_axi_opt.region,
-        user: '0,
+        user: w_tf_q.mask,
         atop: '0
     };
 legalizer_write_data_path: |

diff --git a/src/frontend/inst64/idma_inst64_snitch_pkg.sv b/src/frontend/inst64/idma_inst64_snitch_pkg.sv
@@ -17,5 +17,6 @@ package idma_inst64_snitch_pkg;
   localparam logic [31:0] DMSTAT             = 32'b0000101?????00000000?????0101011;
   localparam logic [31:0] DMSTR              = 32'b0000110??????????000000000101011;
   localparam logic [31:0] DMREP              = 32'b000011100000?????000000000101011;
+  localparam logic [31:0] DMMCAST            = 32'b000100000000?????000000000101011;
 
 endpackage
diff --git a/src/frontend/inst64/idma_inst64_top.sv b/src/frontend/inst64/idma_inst64_top.sv
@@ -432,9 +432,9 @@ module idma_inst64_top #(
                     end
                 end
 
-              // status of the DMA
-              idma_inst64_snitch_pkg::DMSTATI,
-              idma_inst64_snitch_pkg::DMSTAT: begin
+                // status of the DMA
+                idma_inst64_snitch_pkg::DMSTATI,
+                idma_inst64_snitch_pkg::DMSTAT: begin
                     // Parse the status index from the register or immediate.
                     unique casez (acc_req_i.data_op)
                         idma_inst64_snitch_pkg::DMSTATI : begin
@@ -468,27 +468,35 @@ module idma_inst64_top #(
                         acc_res_valid   = 1'b1;
                         acc_req_ready_o = 1'b1;
                     end
-              end
-
-              // manipulate the strides
-              idma_inst64_snitch_pkg::DMSTR : begin
-                  idma_fe_req_d.d_req[0].src_strides = acc_req_i.data_arga;
-                  idma_fe_req_d.d_req[0].dst_strides = acc_req_i.data_argb;
-                  acc_req_ready_o = 1'b1;
-                  is_dma_op       = 1'b1;
-                  dma_op_name     = "DMSTR";
-              end
-
-              // manipulate the strides
-              idma_inst64_snitch_pkg::DMREP : begin
-                  idma_fe_req_d.d_req[0].reps = acc_req_i.data_arga;
-                  acc_req_ready_o = 1'b1;
-                  is_dma_op       = 1'b1;
-                  dma_op_name     = "DMREP";
-              end
-
-              default:;
-          endcase
+                end
+
+                // manipulate the strides
+                idma_inst64_snitch_pkg::DMSTR : begin
+                    idma_fe_req_d.d_req[0].src_strides = acc_req_i.data_arga;
+                    idma_fe_req_d.d_req[0].dst_strides = acc_req_i.data_argb;
+                    acc_req_ready_o = 1'b1;
+                    is_dma_op       = 1'b1;
+                    dma_op_name     = "DMSTR";
+                end
+
+                // manipulate the repetitions
+                idma_inst64_snitch_pkg::DMREP : begin
+                    idma_fe_req_d.d_req[0].reps = acc_req_i.data_arga;
+                    acc_req_ready_o = 1'b1;
+                    is_dma_op       = 1'b1;
+                    dma_op_name     = "DMREP";
+                end
+
+                // write the multicast mask in the destination user signal
+                idma_inst64_snitch_pkg::DMMCAST : begin
+                    idma_fe_req_d.burst_req.dst_mask[31:0] = acc_req_i.data_arga[31:0];
+                    acc_req_ready_o = 1'b1;
+                    is_dma_op       = 1'b1;
+                    dma_op_name     = "DMMCAST";
+                end
+
+                default:;
+            endcase
         end
     end
 

diff --git a/src/include/idma/typedef.svh b/src/include/idma/typedef.svh
@@ -39,6 +39,7 @@
         tf_len_t   length;                                               \
         axi_addr_t src_addr;                                             \
         axi_addr_t dst_addr;                                             \
+        axi_addr_t dst_mask;                                             \
         options_t  opt;                                                  \
     } idma_req_t;
 `define IDMA_TYPEDEF_RSP_T(idma_rsp_t, err_payload_t)                    \