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| author | Joachim StroĢmbergson <joachim@secworks.se> | 2018-10-03 11:28:18 +0200 |
|---|---|---|
| committer | Joachim StroĢmbergson <joachim@secworks.se> | 2018-10-03 11:28:18 +0200 |
| commit | 9daf474ac53397fbe8c427493f619b89917fc8fa (patch) | |
| tree | ac9898fd3156aad4920f924c1742440a859bfb0f | |
| parent | 93802b80c67136a5f01192c17e3d1c8d2668d861 (diff) | |
Restricted write access for control bits to when the core is ready.
| -rw-r--r-- | src/rtl/sha1.v | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/src/rtl/sha1.v b/src/rtl/sha1.v index 9a112b0..c1fd8ec 100644 --- a/src/rtl/sha1.v +++ b/src/rtl/sha1.v @@ -195,13 +195,16 @@ module sha1( begin if (we) begin - if ((address >= ADDR_BLOCK0) && (address <= ADDR_BLOCK15)) - block_we = 1; - - if (address == ADDR_CTRL) + if (core_ready) begin - init_new = write_data[CTRL_INIT_BIT]; - next_new = write_data[CTRL_NEXT_BIT]; + if ((address >= ADDR_BLOCK0) && (address <= ADDR_BLOCK15)) + block_we = 1; + + if (address == ADDR_CTRL) + begin + init_new = write_data[CTRL_INIT_BIT]; + next_new = write_data[CTRL_NEXT_BIT]; + end end end // if (write_read) else @@ -210,7 +213,8 @@ module sha1( tmp_read_data = block_reg[address[3 : 0]]; if ((address >= ADDR_DIGEST0) && (address <= ADDR_DIGEST4)) - tmp_read_data = digest_reg[(4 - (address - ADDR_DIGEST0)) * 32 +: 32]; + if (core_ready) + tmp_read_data = digest_reg[(4 - (address - ADDR_DIGEST0)) * 32 +: 32]; case (address) // Read operations. |