diff options
Diffstat (limited to 'src/rtl/keywrap.v')
| -rw-r--r-- | src/rtl/keywrap.v | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v index 5604ce4..786ab54 100644 --- a/src/rtl/keywrap.v +++ b/src/rtl/keywrap.v @@ -108,6 +108,11 @@ module keywrap #(parameter ADDR_BITS = 13) localparam PAD = ADDR_BITS - 8; + // If set to one, will allow read access to key memory. + // Should be set to zero in all production FPGA bitstreams. + localparam DEBUG_MKM_READ = 1'h1; + + //---------------------------------------------------------------- // Registers including update variables and write enable. //---------------------------------------------------------------- @@ -341,10 +346,12 @@ module keywrap #(parameter ADDR_BITS = 13) if (address == {{PAD{1'h0}}, ADDR_A1}) api_rd_delay_new = core_a_result[31 : 0]; - // Not correct read key mux. - if ((address >= {{PAD{1'h0}}, ADDR_KEY0}) && - (address <= {{PAD{1'h0}}, ADDR_KEY7})) - api_rd_delay_new = core_read_key[031 : 000]; + // Warning: Should be disabled after mkmif + // integration has been completed. + if (DEBUG_MKM_READ) + if ((address >= {{PAD{1'h0}},ADDR_KEY0}) && (address <= {{PAD{1'h0}}, ADDR_KEY7})) + api_rd_delay_new = core_read_key[(7 - (address - {{PAD{1'h0}}, ADDR_KEY7})) * 32 +: 32]; + end // else: !if(we) end // if (cs) end // block: api |