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authorPaul Selkirk <paul@psgd.org>2015-03-31 16:33:43 -0400
committerPaul Selkirk <paul@psgd.org>2015-03-31 16:33:43 -0400
commit2f58e8fc6cffd28afbdb31f489cd8ce061cccad4 (patch)
tree0e1c45b584ffe4eca3cc781896eac0bcb55e8ed8
parent2b874d345b386b1e037756e9fa5c05905f7444cf (diff)
Move eim read delay to novena_eim.v.
-rw-r--r--eim/rtl/novena_eim.v12
1 files changed, 11 insertions, 1 deletions
diff --git a/eim/rtl/novena_eim.v b/eim/rtl/novena_eim.v
index d2b11ed..71b64a9 100644
--- a/eim/rtl/novena_eim.v
+++ b/eim/rtl/novena_eim.v
@@ -141,6 +141,16 @@ module novena_top
// This multiplexer is used to map different types of cores, such as
// hashes, RNGs and ciphers to different regions (segments) of memory.
//----------------------------------------------------------------
+
+ // register read data for one clock cycle for EIM
+ wire [31 : 0] tmp_read_data;
+ reg [31 : 0] tmp_read_data_reg;
+ assign sys_eim_din = tmp_read_data_reg;
+ always @(posedge sys_clk)
+ begin
+ tmp_read_data_reg <= tmp_read_data;
+ end
+
core_selector cores
(
.sys_clk(sys_clk),
@@ -153,7 +163,7 @@ module novena_top
.sys_eim_rd(sys_eim_rd),
.sys_write_data(sys_eim_dout),
- .sys_read_data(sys_eim_din),
+ .sys_read_data(tmp_read_data),
.debug(ct_led)
);