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| author | Joachim StroĢmbergson <joachim@secworks.se> | 2018-09-18 12:35:29 +0200 |
|---|---|---|
| committer | Joachim StroĢmbergson <joachim@secworks.se> | 2018-09-18 12:35:29 +0200 |
| commit | 12db6151bf7a1c896a6f4bb37d46992a3621caaf (patch) | |
| tree | 2753f5b9ff774c40c58dbea421ea039f66fa619e /src/rtl/keywrap.v | |
| parent | 50bc6e775d7a2a4ad75511c43af93759cc6b09c4 (diff) | |
Adding API control bits to read and write key.
Diffstat (limited to 'src/rtl/keywrap.v')
| -rw-r--r-- | src/rtl/keywrap.v | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v index 786ab54..870a85c 100644 --- a/src/rtl/keywrap.v +++ b/src/rtl/keywrap.v @@ -77,6 +77,8 @@ module keywrap #(parameter ADDR_BITS = 13) localparam ADDR_CTRL = 8'h08; localparam CTRL_INIT_BIT = 0; localparam CTRL_NEXT_BIT = 1; + localparam CTRL_READ_BIT = 2; + localparam CTRL_WRITE_BIT = 3; localparam ADDR_STATUS = 8'h09; localparam STATUS_READY_BIT = 0; @@ -122,6 +124,12 @@ module keywrap #(parameter ADDR_BITS = 13) reg next_reg; reg next_new; + reg read_reg; + reg read_new; + + reg write_reg; + reg write_new; + reg encdec_reg; reg keylen_reg; reg config_we; @@ -191,6 +199,8 @@ module keywrap #(parameter ADDR_BITS = 13) .init(init_reg), .next(next_reg), + .read(read_reg), + .write(write_reg), .encdec(encdec_reg), .ready(core_ready), @@ -226,6 +236,8 @@ module keywrap #(parameter ADDR_BITS = 13) init_reg <= 1'h0; next_reg <= 1'h0; + read_reg <= 1'h0; + write_reg <= 1'h0; encdec_reg <= 1'h0; keylen_reg <= 1'h0; rlen_reg <= {RLEN_BITS{1'h0}}; @@ -241,6 +253,8 @@ module keywrap #(parameter ADDR_BITS = 13) valid_reg <= core_valid; init_reg <= init_new; next_reg <= next_new; + read_reg <= read_new; + write_reg <= write_new; api_rd_delay_reg <= api_rd_delay_new; if (config_we) @@ -273,6 +287,8 @@ module keywrap #(parameter ADDR_BITS = 13) begin : api init_new = 1'h0; next_new = 1'h0; + read_new = 1'h0; + write_new = 1'h0; config_we = 1'h0; rlen_we = 1'h0; key_we = 1'h0; @@ -296,8 +312,10 @@ module keywrap #(parameter ADDR_BITS = 13) // Write access 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]; + read_new = write_data[CTRL_READ_BIT]; + write_new = write_data[CTRL_WRITE_BIT]; end if (address == {{PAD{1'h0}}, ADDR_CONFIG}) @@ -332,7 +350,7 @@ module keywrap #(parameter ADDR_BITS = 13) api_rd_delay_new = CORE_VERSION; if (address == {{PAD{1'h0}}, ADDR_CTRL}) - api_rd_delay_new = {28'h0, keylen_reg, encdec_reg, next_reg, init_reg}; + api_rd_delay_new = {26'h0, keylen_reg, encdec_reg, write_reg, read_reg, next_reg, init_reg}; if (address == {{PAD{1'h0}}, ADDR_STATUS}) api_rd_delay_new = {30'h0, valid_reg, ready_reg}; |