diff options
Diffstat (limited to 'src/rtl')
| -rw-r--r-- | src/rtl/keywrap_mkmif.v | 191 |
1 files changed, 169 insertions, 22 deletions
diff --git a/src/rtl/keywrap_mkmif.v b/src/rtl/keywrap_mkmif.v index bb08921..72eaaf4 100644 --- a/src/rtl/keywrap_mkmif.v +++ b/src/rtl/keywrap_mkmif.v @@ -76,10 +76,10 @@ module keywrap_mkmif ( localparam CTRL_NEXT_FINALIZE = 4'ha; // Addresses for storage in the mkm - localparam MKM_STATUS_WORD = 16'h00; - localparam MKM_KEY_BASE_WORD = 16'h04; + localparam MKM_STATUS_WORD = 16'h00; + localparam MKM_KEY_BASE_WORD = 16'h04; - localparam DEFAULT_SCLK_DIV = 16'h0020; + localparam DEFAULT_SCLK_DIV = 16'h0020; //---------------------------------------------------------------- @@ -94,6 +94,14 @@ module keywrap_mkmif ( reg key_word_ctr_rst; reg key_word_ctr_inc; + reg [15 : 0] mkm_addr_reg; + reg [15 : 0] mkm_addr_new; + reg mkm_addr_we; + + reg [31 : 0] mkm_write_data_reg; + reg [31 : 0] mkm_write_data_new; + reg mkm_write_data_we; + reg [31 : 0] status_reg; reg [31 : 0] status_new; reg status_we; @@ -115,7 +123,6 @@ module keywrap_mkmif ( reg mkm_write_op; wire mkm_ready; wire mkm_valid; - reg [15 : 0] mkm_sclk_div; reg [15 : 0] mkm_addr; reg [31 : 0] mkm_write_data; wire [31 : 0] mkm_read_data; @@ -140,9 +147,9 @@ module keywrap_mkmif ( .ready(mkm_ready), .valid(mkm_valid), - .sclk_div(mkm_sclk_div), - .addr(mkm_addr), - .write_data(mkm_write_data), + .sclk_div(DEFAULT_SCLK_DIV), + .addr(mkm_addr_reg), + .write_data(mkm_write_data_reg), .read_data(mkm_read_data) ); @@ -150,6 +157,12 @@ module keywrap_mkmif ( //---------------------------------------------------------------- // Assignments for ports. //---------------------------------------------------------------- + assign ready = ready_reg; + + assign rd_status = status_reg; + + assign rd_key = {key_reg[7], key_reg[6], key_reg[5], key_reg[4], + key_reg[3], key_reg[2], key_reg[1], key_reg[0]}; //---------------------------------------------------------------- @@ -166,6 +179,8 @@ module keywrap_mkmif ( ready_reg <= 1'h1; status_reg <= 32'h0; + mkm_address_reg <= 16'h0; + mkm_write_data_reg <= 32'h0; key_word_ctr_reg <= 3'h0; keywrap_mkmif_ctrl_reg <= CTRL_IDLE; end @@ -175,6 +190,12 @@ module keywrap_mkmif ( if (ready_we) ready_reg <= ready_new; + if (mkm_addr_we) + mkm_addr_reg <= mkm_addr_new; + + if (mkm_write_data_we) + mkm_write_data_reg <= mkm_write_data_new; + if (key_we) key_reg[key_word_ctr_reg] <= mkm_read_data; @@ -218,19 +239,20 @@ module keywrap_mkmif ( //---------------------------------------------------------------- always @* begin : keywrap_mkmif_ctrl - ready_new = 1'h0; - ready_we = 1'h0; - key_we = 1'h0; - key_word_ctr_rst = 1'h0; - key_word_ctr_inc = 1'h0; - status_we = 1'h0; - mkm_init_op = 1'h0; - mkm_read_op = 1'h0; - mkm_write_op = 1'h0; - mkm_sclk_div = DEFAULT_SCLK_DIV; - mkm_addr = 16'h0; - mkm_write_data = 32'h0; - + ready_new = 1'h0; + ready_we = 1'h0; + key_we = 1'h0; + key_word_ctr_rst = 1'h0; + key_word_ctr_inc = 1'h0; + status_we = 1'h0; + mkm_init_op = 1'h0; + mkm_read_op = 1'h0; + mkm_write_op = 1'h0; + mkm_sclk_div = DEFAULT_SCLK_DIV; + mkm_addr_new = 16'h0; + mkm_addr_we = 1'h0; + mkm_write_data_new = 32'h0; + mkm_write_data_we = 1'h0; keywrap_mkmif_ctrl_new = CTRL_IDLE; keywrap_mkmif_ctrl_we = 1'h0; @@ -239,8 +261,133 @@ module keywrap_mkmif ( begin if (init) begin - ready_new = 1'h0; - ready_we = 1'h1; + mkm_init_op = 1'h1; + ready_new = 1'h0; + ready_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_WAIT; + keywrap_mkmif_ctrl_we = 1'h1; + end + + if (read) + begin + ready_new = 1'h0; + ready_we = 1'h1; + + if (key_status) + begin + key_word_ctr_rst = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_READ_KEY; + keywrap_mkmif_ctrl_we = 1'h1; + end + else + begin + mkm_read_op = 1'h1; + mkm_addr_new = MKM_STATUS_WORD; + mkm_addr_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_READ_STATUS_WAIT; + keywrap_mkmif_ctrl_we = 1'h1; + end + + if (write) + if (key_status) + begin + key_word_ctr_rst = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_WRITE_KEY; + keywrap_mkmif_ctrl_we = 1'h1; + end + else + begin + mkm_write_op = 1'h1; + mkm_addr_new = MKM_STATUS_WORD; + mkm_addr_we = 1'h1; + mkm_write_data_new = wr_status; + mkm_write_data_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_WAIT; + keywrap_mkmif_ctrl_we = 1'h1; + end + end + end + + CTRL_WAIT: + begin + if (mkm_ready) + begin + ready_new = 1'h1; + ready_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_IDLE; + keywrap_mkmif_ctrl_we = 1'h1; + end + end + + CTRL_READ_STATUS_WAIT: + begin + if (mkm_ready) + begin + status_we = 1'h1; + ready_new = 1'h1; + ready_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_IDLE; + keywrap_mkmif_ctrl_we = 1'h1; + end + end + + CTRL_READ_KEY: + if (key_word_ctr_reg < 8) + begin + mkm_read_op = 1'h1; + mkm_addr_new = MKM_STATUS_WORD + {key_word_ctr_reg, 2'h0}; + mkm_addr_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_WRITE_KEY_WAIT; + keywrap_mkmif_ctrl_we = 1'h1; + end + else + begin + ready_new = 1'h1; + ready_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_IDLE; + keywrap_mkmif_ctrl_we = 1'h1; + end + end + + CTRL_READ_KEY_WAIT: + begin + if (mkm_ready) + begin + key_we = 1'h1; + key_word_ctr_inc = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_READ_KEY; + keywrap_mkmif_ctrl_we = 1'h1; + end + end + + CTRL_WRITE_KEY: + begin + if (key_word_ctr_reg < 8) + begin + mkm_write_op = 1'h1; + mkm_addr_new = MKM_STATUS_WORD + {key_word_ctr_reg, 2'h0}; + mkm_addr_we = 1'h1; + mkm_write_data_new = key; + mkm_write_data_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_WRITE_KEY_WAIT; + keywrap_mkmif_ctrl_we = 1'h1; + end + else + begin + ready_new = 1'h1; + ready_we = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_IDLE; + keywrap_mkmif_ctrl_we = 1'h1; + end + end + + CTRL_WRITE_KEY_WAIT: + begin + if (mkm_ready) + begin + key_word_ctr_inc = 1'h1; + keywrap_mkmif_ctrl_new = CTRL_WRITE_KEY; + keywrap_mkmif_ctrl_we = 1'h1; end end |