[entropy_src/rtl] add ast rng fips signal
Added an entropy_src to ast signal to indicate fips mode.
Fips mode is where ast rng can generate lower quality entropy.
Signed-off-by: Mark Branstad <mark.branstad@wdc.com>
diff --git a/hw/ip/entropy_src/data/entropy_src.hjson b/hw/ip/entropy_src/data/entropy_src.hjson
index 193ab1a..3bab760 100755
--- a/hw/ip/entropy_src/data/entropy_src.hjson
+++ b/hw/ip/entropy_src/data/entropy_src.hjson
@@ -40,6 +40,13 @@
width: 1
package: ""
}
+ { struct: "logic"
+ type: "uni"
+ name: "rng_fips"
+ act: "req"
+ width: 1
+ package: ""
+ }
],
alert_list: [
{ name: "recov_alert",
diff --git a/hw/ip/entropy_src/rtl/entropy_src.sv b/hw/ip/entropy_src/rtl/entropy_src.sv
old mode 100644
new mode 100755
index c0e7513..469fead
--- a/hw/ip/entropy_src/rtl/entropy_src.sv
+++ b/hw/ip/entropy_src/rtl/entropy_src.sv
@@ -24,6 +24,9 @@
// Efuse Interface
input logic efuse_es_sw_reg_en_i,
+ // RNG Interface
+ output logic rng_fips_o,
+
// Entropy Interface
input entropy_src_hw_if_req_t entropy_src_hw_if_i,
output entropy_src_hw_if_rsp_t entropy_src_hw_if_o,
@@ -74,6 +77,7 @@
.hw2reg,
.efuse_es_sw_reg_en_i,
+ .rng_fips_o,
.entropy_src_hw_if_o,
.entropy_src_hw_if_i,
diff --git a/hw/ip/entropy_src/rtl/entropy_src_core.sv b/hw/ip/entropy_src/rtl/entropy_src_core.sv
old mode 100644
new mode 100755
index 849a2cc..9a5ccfe
--- a/hw/ip/entropy_src/rtl/entropy_src_core.sv
+++ b/hw/ip/entropy_src/rtl/entropy_src_core.sv
@@ -17,6 +17,9 @@
// Efuse Interface
input logic efuse_es_sw_reg_en_i,
+ // RNG Interface
+ output logic rng_fips_o,
+
// Entropy Interface
input entropy_src_hw_if_req_t entropy_src_hw_if_i,
@@ -975,6 +978,9 @@
assign es_bypass_mode = boot_bypass_q || es_bypass_to_sw;
+ // send off to AST RNG for possibly faster entropy generation
+ assign rng_fips_o = es_bypass_mode;
+
//--------------------------------------------
// common health test window counter
//--------------------------------------------
diff --git a/hw/top_earlgrey/data/autogen/top_earlgrey.gen.hjson b/hw/top_earlgrey/data/autogen/top_earlgrey.gen.hjson
index ee51546..8f4e924 100644
--- a/hw/top_earlgrey/data/autogen/top_earlgrey.gen.hjson
+++ b/hw/top_earlgrey/data/autogen/top_earlgrey.gen.hjson
@@ -4330,6 +4330,15 @@
index: -1
}
{
+ name: rng_fips
+ struct: logic
+ type: uni
+ act: req
+ width: 1
+ inst_name: entropy_src
+ index: -1
+ }
+ {
name: tl
struct: tl
package: tlul_pkg
@@ -11447,6 +11456,15 @@
index: -1
}
{
+ name: rng_fips
+ struct: logic
+ type: uni
+ act: req
+ width: 1
+ inst_name: entropy_src
+ index: -1
+ }
+ {
name: tl
struct: tl
package: tlul_pkg
diff --git a/hw/top_earlgrey/rtl/autogen/top_earlgrey.sv b/hw/top_earlgrey/rtl/autogen/top_earlgrey.sv
index 76b94e2..36d7832 100644
--- a/hw/top_earlgrey/rtl/autogen/top_earlgrey.sv
+++ b/hw/top_earlgrey/rtl/autogen/top_earlgrey.sv
@@ -2054,6 +2054,7 @@
.entropy_src_xht_o(),
.entropy_src_xht_i(entropy_src_pkg::ENTROPY_SRC_XHT_RSP_DEFAULT),
.efuse_es_sw_reg_en_i('0),
+ .rng_fips_o(),
.tl_i(entropy_src_tl_req),
.tl_o(entropy_src_tl_rsp),
