diff options
| -rw-r--r-- | src/rtl/keywrap.v | 93 | ||||
| -rw-r--r-- | src/tb/tb_keywrap.v | 24 |
2 files changed, 75 insertions, 42 deletions
diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v index 58d40c0..885578b 100644 --- a/src/rtl/keywrap.v +++ b/src/rtl/keywrap.v @@ -92,7 +92,7 @@ module keywrap( localparam CORE_NAME0 = 32'h6b657920; // "key " localparam CORE_NAME1 = 32'h77726170; // "wrap" - localparam CORE_VERSION = 32'h302e3730; // "0.70" + localparam CORE_VERSION = 32'h302e3731; // "0.71" //---------------------------------------------------------------- @@ -123,6 +123,9 @@ module keywrap( reg [31 : 0] key_reg [0 : 7]; reg key_we; + reg [31 : 0] api_rd_delay_reg; + reg [31 : 0] api_rd_delay_new; + reg valid_reg; reg ready_reg; @@ -198,23 +201,25 @@ module keywrap( for (i = 0 ; i < 8 ; i = i + 1) key_reg[i] <= 32'h0; - init_reg <= 1'h0; - next_reg <= 1'h0; - encdec_reg <= 1'h0; - keylen_reg <= 1'h0; - r_bank_reg <= 7'h0; - rlen_reg <= 13'h0; - valid_reg <= 1'h0; - ready_reg <= 1'h0; - a0_reg <= 32'h0; - a1_reg <= 32'h0; + init_reg <= 1'h0; + next_reg <= 1'h0; + encdec_reg <= 1'h0; + keylen_reg <= 1'h0; + r_bank_reg <= 7'h0; + rlen_reg <= 13'h0; + valid_reg <= 1'h0; + ready_reg <= 1'h0; + a0_reg <= 32'h0; + a1_reg <= 32'h0; + api_rd_delay_reg <= 32'h0; end else begin - ready_reg <= core_ready; - valid_reg <= core_valid; - init_reg <= init_new; - next_reg <= next_new; + ready_reg <= core_ready; + valid_reg <= core_valid; + init_reg <= init_new; + next_reg <= next_new; + api_rd_delay_reg <= api_rd_delay_new; if (config_we) begin @@ -247,17 +252,24 @@ module keywrap( //---------------------------------------------------------------- always @* begin : api - init_new = 1'h0; - next_new = 1'h0; - config_we = 1'h0; - rlen_we = 1'h0; - r_bank_we = 1'h0; - key_we = 1'h0; - core_api_we = 1'h0; - a0_we = 1'h0; - a1_we = 1'h0; - tmp_read_data = 32'h0; - tmp_error = 1'h0; + init_new = 1'h0; + next_new = 1'h0; + config_we = 1'h0; + rlen_we = 1'h0; + r_bank_we = 1'h0; + key_we = 1'h0; + core_api_we = 1'h0; + a0_we = 1'h0; + a1_we = 1'h0; + tmp_read_data = 32'h0; + tmp_error = 1'h0; + api_rd_delay_new = 32'h0; + + // api_mux + if (address[7]) + tmp_read_data = core_api_rd_data; + else + tmp_read_data = api_rd_delay_reg; if (cs) begin @@ -290,41 +302,38 @@ module keywrap( if (address >= ADDR_R_DATA0 && address <= ADDR_R_DATA127) core_api_we = 1'h1; end // if (we) - else begin + // Read access if (address == ADDR_NAME0) - tmp_read_data = CORE_NAME0; + api_rd_delay_new = CORE_NAME0; if (address == ADDR_NAME1) - tmp_read_data = CORE_NAME1; + api_rd_delay_new = CORE_NAME1; if (address == ADDR_VERSION) - tmp_read_data = CORE_VERSION; + api_rd_delay_new = CORE_VERSION; if (address == ADDR_CTRL) - tmp_read_data = {28'h0, keylen_reg, encdec_reg, next_reg, init_reg}; + api_rd_delay_new = {28'h0, keylen_reg, encdec_reg, next_reg, init_reg}; if (address == ADDR_STATUS) - tmp_read_data = {30'h0, valid_reg, ready_reg}; + api_rd_delay_new = {30'h0, valid_reg, ready_reg}; if (address == ADDR_RLEN) - tmp_read_data = {19'h0, rlen_reg}; + api_rd_delay_new = {19'h0, rlen_reg}; if (address == ADDR_R_BANK) - tmp_read_data = {25'h0, r_bank_reg}; + api_rd_delay_new = {25'h0, r_bank_reg}; if (address == ADDR_A0) - tmp_read_data = core_a_result[63 : 32]; + api_rd_delay_new = core_a_result[63 : 32]; if (address == ADDR_A1) - tmp_read_data = core_a_result[31 : 0]; - - if (address >= ADDR_R_DATA0 && address <= ADDR_R_DATA127) - tmp_read_data = core_api_rd_data; - end - end - end // addr_decoder + api_rd_delay_new = core_a_result[31 : 0]; + end // else: !if(we) + end // if (cs) + end // block: api endmodule // keywrap //====================================================================== diff --git a/src/tb/tb_keywrap.v b/src/tb/tb_keywrap.v index c28b5a6..412bdb2 100644 --- a/src/tb/tb_keywrap.v +++ b/src/tb/tb_keywrap.v @@ -359,6 +359,28 @@ module tb_keywrap(); //---------------------------------------------------------------- + // test_core_access + // Simple test that we can perform read access to regs + // in the core. + //---------------------------------------------------------------- + task test_core_access; + begin : test_core_access + $display("** TC test_core_access START."); + + read_word(ADDR_NAME0); + $display("NAME0: %s", read_data); + read_word(ADDR_NAME1); + $display("NAME1: %s", read_data); + read_word(ADDR_VERSION); + $display("version: %s", read_data); + $display(""); + + $display("** TC test_core_access END."); + end + endtask // test_core_access + + + //---------------------------------------------------------------- // test_kwp_ae_128_1 // Implements wrap test based on NIST KWP_AE 128 bit key // with 248 bit plaintext. @@ -949,6 +971,8 @@ module tb_keywrap(); reset_dut(); dump_dut_state(); + test_core_access(); + test_kwp_ae_128_1(); test_kwp_ad_128_1(); test_kwp_ae_128_2(); |