[swcore/in_blk] bugfix: when rtu drop decision and EOF happened in the same…

[swcore/in_blk] bugfix: when rtu drop decision and EOF happened in the same cycle... we were in trouble

[swcore/in_blk] bugfix: when rtu drop decision and EOF happened in the same…
[swcore/in_blk] bugfix: when rtu drop decision and EOF happened in the same cycle... we were in trouble
86361e03 · Maciej Lipinski · 1db2f53e · 86361e03
Commit 86361e03 authored Nov 10, 2013 by Maciej Lipinski
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Showing with 12 additions and 2 deletions

xswc_input_block.vhd modules/wrsw_swcore/xswc_input_block.vhd +12 -2

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--- a/modules/wrsw_swcore/xswc_input_block.vhd
+++ b/modules/wrsw_swcore/xswc_input_block.vhd
@@ -973,7 +973,16 @@ begin  --archS_PCKSTART_SET_AND_REQ
                s_rcv_pck <= S_WAIT_FORCE_FREE;
              else
                mmu_force_free_req <= '1';
-                s_rcv_pck          <= S_DROP;
+                 
+                -- it might happen that drop decision comes in the cycle when EOF - can go 
+                -- straight to IDLE
+                if(in_pck_eof = '1') then
+                  snk_stall_force_h <= '0';
+                  snk_stall_force_l <= '1';
+                  s_rcv_pck         <= S_IDLE;
+                else
+                  s_rcv_pck         <= S_DROP;
+                end if;
              end if;

              snk_stall_force_l <= '0';
@@ -1002,7 +1011,8 @@ begin  --archS_PCKSTART_SET_AND_REQ
             
              if(mem_full_dump ='1') then 
                -- stay in the the same state, we already set rp_in_pck_err and the problem
-                -- will be handled in the next cycle as error
+                -- will be handled in the next cycle as error.
+                -- if this happens when EOF, we are fine cause EOF was already handled
                s_rcv_pck         <= S_DROP;
              else
                -- hopefully will not happen