diff options
Diffstat (limited to 'src/rtl/keywrap.v')
| -rw-r--r-- | src/rtl/keywrap.v | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v index c03e903..02c20fc 100644 --- a/src/rtl/keywrap.v +++ b/src/rtl/keywrap.v @@ -72,6 +72,7 @@ module keywrap #(parameter ADDR_BITS = 13) localparam ADDR_CTRL = 8'h08; localparam CTRL_INIT_BIT = 0; localparam CTRL_NEXT_BIT = 1; + localparam CTRL_ZEROISE_BIT = 2; localparam ADDR_STATUS = 8'h09; localparam STATUS_READY_BIT = 0; @@ -136,6 +137,12 @@ module keywrap #(parameter ADDR_BITS = 13) reg [31 : 0] timeout_reg; reg timeout_we; + reg ping_reg; + reg ping_new; + + reg zeroise_reg; + reg zeroise_new; + reg [31 : 0] api_rd_delay_reg; reg [31 : 0] api_rd_delay_new; @@ -192,6 +199,8 @@ module keywrap #(parameter ADDR_BITS = 13) .loaded(core_loaded), .timeout(timeout_reg), + .ping(ping_reg), + .zeroise(zeroise_reg), .rlen(rlen_reg), @@ -232,6 +241,8 @@ module keywrap #(parameter ADDR_BITS = 13) a1_reg <= 32'h0; api_rd_delay_reg <= 32'h0; timeout_reg <= DEFAULT_TIMEOUT; + ping_reg <= 1'h0; + zeroise_reg <= 1'h0; end else begin @@ -240,6 +251,8 @@ module keywrap #(parameter ADDR_BITS = 13) loaded_reg <= core_loaded; init_reg <= init_new; next_reg <= next_new; + ping_reg <= ping_new; + zeroise_reg <= zeroise_new; api_rd_delay_reg <= api_rd_delay_new; if (config_we) @@ -283,6 +296,8 @@ module keywrap #(parameter ADDR_BITS = 13) a1_we = 1'h0; tmp_read_data = 32'h0; tmp_error = 1'h0; + ping_new = 1'h0; + zeroise_new = 1'h0; api_rd_delay_new = 32'h0; // api_mux @@ -297,8 +312,9 @@ module keywrap #(parameter ADDR_BITS = 13) begin if (address == {{PAD{1'h0}}, ADDR_CTRL}) begin - init_new = write_data[CTRL_INIT_BIT]; - next_new = write_data[CTRL_NEXT_BIT]; + init_new = write_data[CTRL_INIT_BIT]; + next_new = write_data[CTRL_NEXT_BIT]; + zeroise_new = write_data[CTRL_ZEROISE_BIT]; end if (address == {{PAD{1'h0}}, ADDR_CONFIG}) @@ -339,7 +355,10 @@ module keywrap #(parameter ADDR_BITS = 13) api_rd_delay_new = {28'h0, keylen_reg, encdec_reg, next_reg, init_reg}; if (address == {{PAD{1'h0}}, ADDR_STATUS}) - api_rd_delay_new = {29'h0, loaded_reg, valid_reg, ready_reg}; + begin + api_rd_delay_new = {29'h0, loaded_reg, valid_reg, ready_reg}; + ping_new = 1'h1; + end if (address == {{PAD{1'h0}}, ADDR_TIMEOUT}) api_rd_delay_new = timeout_reg; |