removes the icache and pipelines the reads

2 files changed, 21 insertions, 11 deletions

diff --git a/usrp2/opencores/aemb/rtl/verilog/aeMB_bpcu.v b/usrp2/opencores/aemb/rtl/verilog/aeMB_bpcu.v
index a7c686e7e..81587e25c 100644
--- a/usrp2/opencores/aemb/rtl/verilog/aeMB_bpcu.v
+++ b/usrp2/opencores/aemb/rtl/verilog/aeMB_bpcu.v
@@ -125,7 +125,7 @@ module aeMB_bpcu (/*AUTOARG*/
    reg [31:2] 	   rPC, xPC;
    reg [31:2] 	   rPCLNK, xPCLNK;
    
-   assign 	   iwb_adr_o = rIPC[IW-1:2];
+   assign 	   iwb_adr_o = gena ? xIPC[IW-1:2] :  rIPC[IW-1:2]; //IJB
    
    always @(/*AUTOSENSE*/rBRA or rIPC or rPC or rRESULT) begin
       //xPCLNK <= (^rATOM) ? rPC : rPC;
@@ -168,7 +168,8 @@ module aeMB_bpcu (/*AUTOARG*/
 	rATOM <= 2'h0;
 	rBRA <= 1'h0;
 	rDLY <= 1'h0;
-	rIPC <= 30'h0;
+//	rIPC <= 30'h0;
+	rIPC <= 30'h3fffffff; // DWORD aligned address 
 	rPC <= 30'h0;
 	rPCLNK <= 30'h0;
 	// End of automatics
diff --git a/usrp2/opencores/aemb/rtl/verilog/aeMB_core_BE.v b/usrp2/opencores/aemb/rtl/verilog/aeMB_core_BE.v
index 9ffa20ff2..38ca3a023 100644
--- a/usrp2/opencores/aemb/rtl/verilog/aeMB_core_BE.v
+++ b/usrp2/opencores/aemb/rtl/verilog/aeMB_core_BE.v
@@ -10,12 +10,10 @@ module aeMB_core_BE
     parameter MUL=0, parameter BSF=0)
     (input sys_clk_i,
      input sys_rst_i,
-
-     output iwb_stb_o,
-     output [ISIZ-1:0] iwb_adr_o,
-     input [31:0] iwb_dat_i,
-     input iwb_ack_i,
-
+     // Instruction port
+     output [14:0] if_adr,
+     input [31:0] if_dat,
+     // Data port
      output dwb_we_o,
      output dwb_stb_o,
      output [DSIZ-1:0] dwb_adr_o,
@@ -28,17 +26,28 @@ module aeMB_core_BE
      input sys_int_i, 
      input sys_exc_i);
 
-   assign  dwb_cyc_o = dwb_stb_o;
 
+   wire [ISIZ-1:0] iwb_adr_o;
+   wire [31:0] 	   iwb_dat_i;
+   wire 	   iwb_ack_i;
+   wire 	   iwb_stb_o;
+   
+   assign dwb_cyc_o = dwb_stb_o;
+   assign iwb_ack_i = 1'b1;
+   assign if_adr = iwb_adr_o[14:0];
+   assign iwb_dat_i = if_dat;
+
+   // Note some "wishbone" instruction fetch signals pruned on external interface
+   // but not propogated change deep into aeMB.
    aeMB_edk32 #(.IW(ISIZ),.DW(DSIZ),.MUL(MUL),.BSF(BSF))
      aeMB_edk32 (.sys_clk_i(sys_clk_i), 
 		 .sys_rst_i(sys_rst_i),
-		 
+		 // Instruction Port
 		 .iwb_stb_o(iwb_stb_o),
 		 .iwb_adr_o(iwb_adr_o[ISIZ-1:2]),
 		 .iwb_ack_i(iwb_ack_i),
 		 .iwb_dat_i(iwb_dat_i),
-		 
+		 // Data port
 		 .dwb_wre_o(dwb_we_o),
 		 .dwb_stb_o(dwb_stb_o),
 		 .dwb_adr_o(dwb_adr_o[DSIZ-1:2]),