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authorJoachim StroĢˆmbergson <joachim@secworks.se>2015-02-02 16:45:38 +0100
committerJoachim StroĢˆmbergson <joachim@secworks.se>2015-02-02 16:45:38 +0100
commit86311d72381423582f2de5f91fa9fbb447098934 (patch)
tree642c7f26189cda6894f24be17637c0a0b10c2722 /rtl/src
parentbe2f38da52b2b4d0c0ce282ea15f1100d11a81ec (diff)
Changed core_selector to instead use the cryptech sha256 core.
Diffstat (limited to 'rtl/src')
-rw-r--r--rtl/src/verilog/core_selector.v95
1 files changed, 10 insertions, 85 deletions
diff --git a/rtl/src/verilog/core_selector.v b/rtl/src/verilog/core_selector.v
index 8ce2003..7f92e43 100644
--- a/rtl/src/verilog/core_selector.v
+++ b/rtl/src/verilog/core_selector.v
@@ -48,94 +48,19 @@ module core_selector
input wire [31 : 0] write_data
);
- //
- // Internal Registers
- //
- reg [31: 0] reg_x = {32{1'b0}};
- reg [31: 0] reg_y = {32{1'b0}};
- reg [15: 0] reg_ctl = {16{1'b0}};
- reg [31: 0] read_data_reg = {32{1'b0}};
+ sha256 sha256_inst(
+ .clk(sys_clk),
+ .reset_n(~sys_rst),
- //
- // Parameters
- //
- localparam ADDER_BASE_ADDR = 12'h321; // upper 12 bits of address
- localparam ADDER_OFFSET_REG_X = 2'd0; // X
- localparam ADDER_OFFSET_REG_Y = 2'd1; // Y
- localparam ADDER_OFFSET_REG_Z = 2'd2; // Z
- localparam ADDER_OFFSET_REG_SC = 2'd3; // {STATUS, CONTROL}
-
-
- /* This flag detects whether adder core is being addressed. */
- wire eim_access_adder = (sys_eim_addr[13:2] == ADDER_BASE_ADDR) ? 1'b1 : 1'b0;
-
- /* These flags detect whether write or read access is requested. */
- wire eim_access_write = sys_eim_wr & eim_access_adder;
- wire eim_access_read = sys_eim_rd & eim_access_adder;
-
-
- //
- // Write Request Handler
- //
- always @(posedge sys_clk)
- //
- if (sys_rst) begin
- reg_x <= {32{1'b0}};
- reg_y <= {32{1'b0}};
- reg_ctl <= {16{1'b0}};
- end else if (eim_access_write) begin
- //
- case (sys_eim_addr[1:0])
- ADDER_OFFSET_REG_X: reg_x <= write_data;
- ADDER_OFFSET_REG_Y: reg_y <= write_data;
- ADDER_OFFSET_REG_SC: reg_ctl <= write_data[15 : 0];
- endcase
- //
- end
-
-
- //
- // Read Request Handler
- //
- wire [31: 0] reg_z;
- wire [15: 0] reg_sts;
-
- always @(posedge sys_clk)
- //
- if (sys_rst) read_data_reg <= {32{1'b0}};
- //
- else if (eim_access_read) begin
- //
- case (sys_eim_addr[1:0])
- ADDER_OFFSET_REG_X: read_data_reg <= reg_x;
- ADDER_OFFSET_REG_Y: read_data_reg <= reg_y;
- ADDER_OFFSET_REG_Z: read_data_reg <= reg_z;
- ADDER_OFFSET_REG_SC: read_data_reg <= {reg_sts, reg_ctl};
- endcase
- //
- end
-
- assign read_data = read_data_reg;
-
-
- //
- // Demo Adder Core
- //
- demo_adder adder_core
- (
- .clk (sys_clk),
- .rst (sys_rst),
-
- .x (reg_x),
- .y (reg_y),
- .z (reg_z),
-
- .ctl (reg_ctl),
- .sts (reg_sts)
- );
-
+ .cs(sys_eim_rd | sys_eim_wr),
+ .we(sys_eim_wr),
+ .address(sys_eim_addr[7 : 0]),
+ .write_data(write_data),
+ .read_data(read_data),
+ .error()
+ );
endmodule