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-rw-r--r--src/rtl/keywrap_core.v184
-rw-r--r--src/rtl/keywrap_mkmif.v12
-rw-r--r--src/tb/tb_keywrap_core.v3
3 files changed, 66 insertions, 133 deletions
diff --git a/src/rtl/keywrap_core.v b/src/rtl/keywrap_core.v
index 533cc83..cf6e00a 100644
--- a/src/rtl/keywrap_core.v
+++ b/src/rtl/keywrap_core.v
@@ -55,6 +55,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
input wire read,
input wire write,
input wire mkey_mstatus,
+ input wire mkey_key,
input wire encdec,
output wire ready,
@@ -82,43 +83,19 @@ module keywrap_core #(parameter MEM_BITS = 11)
//----------------------------------------------------------------
localparam MAX_ITERATIONS = 6 - 1;
- localparam CTRL_IDLE = 6'h0;
- localparam CTRL_INIT_WAIT = 6'h1;
- localparam CTRL_NEXT_WSTART = 6'h2;
- localparam CTRL_NEXT_USTART = 6'h3;
- localparam CTRL_NEXT_LOOP0 = 6'h4;
- localparam CTRL_NEXT_LOOP = 6'h5;
- localparam CTRL_NEXT_WAIT = 6'h6;
- localparam CTRL_NEXT_UPDATE = 6'h7;
- localparam CTRL_NEXT_WCHECK = 6'h8;
- localparam CTRL_NEXT_UCHECK = 6'h9;
- localparam CTRL_NEXT_FINALIZE = 6'ha;
-
- localparam CTRL_MKM_RD_START = 6'h10;
- localparam CTRL_MKM_RD_WAIT0 = 6'h11;
- localparam CTRL_MKM_RD_STATUS = 6'h12;
- localparam CTRL_MKM_RD_END = 6'h13;
-
- localparam CTRL_MKM_WR_START = 6'h18;
- localparam CTRL_MKM_WR_WAIT0 = 6'h19;
- localparam CTRL_MKM_WR_END = 6'h1a;
-
- // API for mkm used by the core.
- localparam MKM_ADDR_CTRL = 8'h08;
- localparam MKM_CTRL_READ_BIT = 0;
- localparam MKM_CTRL_WRITE_BIT = 1;
- localparam MKM_ADDR_STATUS = 8'h09;
- localparam MKM_STATUS_READY_BIT = 0;
- localparam MKM_STATUS_VALID_BIT = 1;
- localparam MKM_ADDR_SCLK_DIV = 8'h0a;
- localparam MKM_ADDR_EMEM_ADDR = 8'h10;
- localparam MKM_ADDR_EMEM_DATA = 8'h20;
-
- // Addresses for storage in the mkm
- localparam MKM_STATUS_WORD = 16'h00;
- localparam MKM_KEY_BASE_WORD = 16'h04;
-
- localparam DEFAULT_SCLK_DIV = 16'h0020;
+ localparam CTRL_RESET = 4'h0;
+ localparam CTRL_IDLE = 4'h1;
+ localparam CTRL_INIT_WAIT = 4'h2;
+ localparam CTRL_NEXT_WSTART = 4'h3;
+ localparam CTRL_NEXT_USTART = 4'h4;
+ localparam CTRL_NEXT_LOOP0 = 4'h5;
+ localparam CTRL_NEXT_LOOP = 4'h6;
+ localparam CTRL_NEXT_WAIT = 4'h7;
+ localparam CTRL_NEXT_UPDATE = 4'h8;
+ localparam CTRL_NEXT_WCHECK = 4'h9;
+ localparam CTRL_NEXT_UCHECK = 4'ha;
+ localparam CTRL_NEXT_FINALIZE = 4'hb;
+ localparam CTRL_MKM_WAIT = 4'hc;
//----------------------------------------------------------------
@@ -153,8 +130,8 @@ module keywrap_core #(parameter MEM_BITS = 11)
reg iteration_ctr_set;
reg iteration_ctr_rst;
- reg [5 : 0] keywrap_core_ctrl_reg;
- reg [5 : 0] keywrap_core_ctrl_new;
+ reg [3 : 0] keywrap_core_ctrl_reg;
+ reg [3 : 0] keywrap_core_ctrl_new;
reg keywrap_core_ctrl_we;
@@ -167,6 +144,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
wire aes_valid;
reg [127 : 0] aes_block;
wire [127 : 0] aes_result;
+ reg [255 : 0] aes_key;
reg update_state;
@@ -180,7 +158,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
reg mkm_write;
reg mkm_key_status;
wire mkm_ready;
- wire [255 : 0] mkm_key;
+ wire [255 : 0] mkm_rd_key;
wire [31 : 0] mkm_rd_status;
wire [31 : 0] mkm_wr_status;
@@ -212,7 +190,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
.init(aes_init),
.next(aes_next),
- .key(key),
+ .key(aes_key),
.keylen(keylen),
.block(aes_block),
@@ -235,13 +213,13 @@ module keywrap_core #(parameter MEM_BITS = 11)
.init(mkm_init),
.read(mkm_read),
.write(mkm_write),
- .key_status(mkm_key_status),
+ .key_status(mkey_mstatus),
.ready(mkm_ready),
.wr_status(mkm_wr_status),
.rd_status(mkm_rd_status),
.wr_key(key),
- .rd_key(mkm_key)
+ .rd_key(mkm_rd_key)
);
@@ -251,7 +229,8 @@ module keywrap_core #(parameter MEM_BITS = 11)
assign a_result = a_reg;
assign ready = ready_reg;
assign valid = valid_reg;
- assign mstatus = mkm_status_reg;
+ assign mkey = mkm_rd_key;
+ assign mstatus = mkm_rd_status;
//----------------------------------------------------------------
@@ -268,7 +247,7 @@ module keywrap_core #(parameter MEM_BITS = 11)
valid_reg <= 1'h1;
block_ctr_reg <= {(MEM_BITS - 1){1'h0}};
iteration_ctr_reg <= 3'h0;
- keywrap_core_ctrl_reg <= CTRL_IDLE;
+ keywrap_core_ctrl_reg <= CTRL_RESET;
end
else
@@ -276,9 +255,6 @@ module keywrap_core #(parameter MEM_BITS = 11)
if (a_we)
a_reg <= a_new;
- if (mkm_status_we)
- mkm_status_reg <= mkm_read_data;
-
if (ready_we)
ready_reg <= ready_new;
@@ -407,6 +383,17 @@ module keywrap_core #(parameter MEM_BITS = 11)
end
+ //----------------------------------------------------------------
+ // aes_key_mux
+ //----------------------------------------------------------------
+ always @*
+ begin
+ if (mkey_key)
+ aes_key = mkm_rd_key;
+ else
+ aes_key = key;
+ end
+
//----------------------------------------------------------------
// keywrap_core_ctrl
@@ -421,6 +408,9 @@ module keywrap_core #(parameter MEM_BITS = 11)
update_state = 1'h0;
aes_init = 1'h0;
aes_next = 1'h0;
+ mkm_init = 1'h0;
+ mkm_read = 1'h0;
+ mkm_write = 1'h0;
block_ctr_dec = 1'h0;
block_ctr_inc = 1'h0;
block_ctr_rst = 1'h0;
@@ -430,18 +420,21 @@ module keywrap_core #(parameter MEM_BITS = 11)
iteration_ctr_set = 1'h0;
iteration_ctr_rst = 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;
-
keywrap_core_ctrl_new = CTRL_IDLE;
keywrap_core_ctrl_we = 1'h0;
case (keywrap_core_ctrl_reg)
+ CTRL_RESET:
+ begin
+ mkm_init = 1'h1;
+ ready_new = 1'h0;
+ ready_we = 1'h1;
+ keywrap_core_ctrl_new = CTRL_MKM_WAIT;
+ keywrap_core_ctrl_we = 1'h0;
+ end
+
+
CTRL_IDLE:
begin
if (init)
@@ -472,17 +465,20 @@ module keywrap_core #(parameter MEM_BITS = 11)
if (read)
begin
+ mkm_write = 1'h1;
ready_new = 1'h0;
ready_we = 1'h1;
- keywrap_core_ctrl_new = CTRL_MKM_RD_START;
+ mkm_read = 1'h1;
+ keywrap_core_ctrl_new = CTRL_MKM_WAIT;
keywrap_core_ctrl_we = 1'h1;
end
if (write)
begin
+ mkm_write = 1'h1;
ready_new = 1'h0;
ready_we = 1'h1;
- keywrap_core_ctrl_new = CTRL_MKM_WR_START;
+ keywrap_core_ctrl_new = CTRL_MKM_WAIT;
keywrap_core_ctrl_we = 1'h1;
end
end
@@ -616,85 +612,19 @@ module keywrap_core #(parameter MEM_BITS = 11)
end
- CTRL_MKM_RD_START:
- begin
- mkm_init_op = 1'h1;
- keywrap_core_ctrl_new = CTRL_MKM_RD_WAIT0;
- keywrap_core_ctrl_we = 1'h1;
- end
-
-
- CTRL_MKM_RD_WAIT0:
- begin
- if (mkm_ready)
- // MKM should have been initialized.
- if (mkey_mstatus)
- begin
- // Read master key from mkm.
- keywrap_core_ctrl_new = CTRL_MKM_RD_END;
- keywrap_core_ctrl_we = 1'h1;
- end
- else
- begin
- // Read master key status from mkm.
- mkm_read_op = 1'h1;
- mkm_addr = MKM_STATUS_WORD;
- keywrap_core_ctrl_new = CTRL_MKM_RD_STATUS;
- keywrap_core_ctrl_we = 1'h1;
- end
- end
-
-
- CTRL_MKM_RD_STATUS:
- begin
- if (mkm_ready)
- begin
- // status should have been read.
- mkm_status_we = 1'h1;
- keywrap_core_ctrl_new = CTRL_MKM_RD_END;
- keywrap_core_ctrl_we = 1'h1;
- end
- end
-
-
- CTRL_MKM_RD_END:
- begin
- ready_new = 1'h1;
- ready_we = 1'h1;
- keywrap_core_ctrl_new = CTRL_IDLE;
- keywrap_core_ctrl_we = 1'h1;
- end
-
-
- CTRL_MKM_WR_START:
- begin
- mkm_init_op = 1'h1;
- keywrap_core_ctrl_new = CTRL_MKM_WR_WAIT0;
- keywrap_core_ctrl_we = 1'h1;
- end
-
-
- CTRL_MKM_WR_WAIT0:
+ CTRL_MKM_WAIT:
begin
if (mkm_ready)
begin
- keywrap_core_ctrl_new = CTRL_MKM_WR_END;
+ ready_new = 1'h1;
+ ready_we = 1'h1;
+ keywrap_core_ctrl_new = CTRL_IDLE;
keywrap_core_ctrl_we = 1'h1;
end
end
-
- CTRL_MKM_WR_END:
- begin
- ready_new = 1'h1;
- ready_we = 1'h1;
- keywrap_core_ctrl_new = CTRL_IDLE;
- keywrap_core_ctrl_we = 1'h1;
- end
-
default:
begin
-
end
endcase // case (keywrap_core_ctrl_reg)
end // keywrap_core_ctrl
diff --git a/src/rtl/keywrap_mkmif.v b/src/rtl/keywrap_mkmif.v
index 082173b..ad2121e 100644
--- a/src/rtl/keywrap_mkmif.v
+++ b/src/rtl/keywrap_mkmif.v
@@ -171,11 +171,11 @@ module keywrap_mkmif (
if (!reset_n)
begin
for (i = 0 ; i < 8 ; i = i + 1)
- key[i] <= 32'h0;
+ key_reg[i] <= 32'h0;
ready_reg <= 1'h1;
status_reg <= 32'h0;
- mkm_address_reg <= 16'h0;
+ mkm_addr_reg <= 16'h0;
mkm_write_data_reg <= 32'h0;
key_word_ctr_reg <= 3'h0;
keywrap_mkmif_ctrl_reg <= CTRL_IDLE;
@@ -217,8 +217,8 @@ module keywrap_mkmif (
if (key_word_ctr_rst)
begin
- iteration_ctr_new = 3'h0;
- iteration_ctr_we = 1'h1;
+ key_word_ctr_new = 3'h0;
+ key_word_ctr_we = 1'h1;
end
if (key_word_ctr_inc)
@@ -244,7 +244,6 @@ module keywrap_mkmif (
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;
@@ -328,6 +327,7 @@ module keywrap_mkmif (
end
CTRL_READ_KEY:
+ begin
if (key_word_ctr_reg < 8)
begin
mkm_read_op = 1'h1;
@@ -363,7 +363,7 @@ module keywrap_mkmif (
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[key_word_ctr_reg * 32 +: 32];
+ mkm_write_data_new = wr_key[key_word_ctr_reg * 32 +: 32];
mkm_write_data_we = 1'h1;
keywrap_mkmif_ctrl_new = CTRL_WRITE_KEY_WAIT;
keywrap_mkmif_ctrl_we = 1'h1;
diff --git a/src/tb/tb_keywrap_core.v b/src/tb/tb_keywrap_core.v
index 27a2e91..07777aa 100644
--- a/src/tb/tb_keywrap_core.v
+++ b/src/tb/tb_keywrap_core.v
@@ -68,6 +68,7 @@ module tb_keywrap_core();
reg tb_write;
reg tb_encdec;
reg tb_mkey_mstatus;
+ reg tb_mkey_key;
wire tb_ready;
wire tb_valid;
reg [(RLEN_BITS - 1) : 0] tb_rlen;
@@ -107,6 +108,7 @@ module tb_keywrap_core();
.read(tb_read),
.write(tb_write),
.mkey_mstatus(tb_mkey_mstatus),
+ .mkey_key(tb_mkey_key),
.encdec(tb_encdec),
.ready(tb_ready),
@@ -175,6 +177,7 @@ module tb_keywrap_core();
tb_write = 0;
tb_encdec = 0;
tb_mkey_mstatus = 0;
+ tb_mkey_key = 0;
tb_rlen = 13'h0;
tb_key = 256'h0;
tb_status = 32'h0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 22:13:20 +0000