diff options
| author | Alejandro Soto <alejandro@34project.org> | 2022-12-11 23:54:38 -0600 |
|---|---|---|
| committer | Alejandro Soto <alejandro@34project.org> | 2022-12-16 16:29:10 -0600 |
| commit | 79e05aa7f0ccce6eb26248ddef3e928727857a9c (patch) | |
| tree | 8c67d6532234dac0eace7f005638efc8441105a5 /rtl/core/porch | |
| parent | 0284628a47d5b4797c89f6846b9efee3f1243b94 (diff) | |
Implement prefetch aborts
Diffstat (limited to 'rtl/core/porch')
| -rw-r--r-- | rtl/core/porch/porch.sv | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/rtl/core/porch/porch.sv b/rtl/core/porch/porch.sv index 4369836..99ba9ed 100644 --- a/rtl/core/porch/porch.sv +++ b/rtl/core/porch/porch.sv @@ -10,13 +10,15 @@ module core_porch input word fetch_insn, input logic fetch_nop, + fetch_abort, input ptr fetch_insn_pc, fetch_head, input insn_decode fetch_dec, output word insn, output ptr insn_pc, - output insn_decode dec + output insn_decode dec, + output logic abort ); logic execute, conditional, undefined, nop; @@ -25,7 +27,7 @@ module core_porch always_comb begin dec = hold_dec; dec.ctrl.nop = nop; - dec.ctrl.execute = !flush && dec.ctrl.execute && execute && !nop; + dec.ctrl.execute = !flush && dec.ctrl.execute && execute && !nop && !abort; dec.ctrl.undefined = !flush && (dec.ctrl.undefined || undefined); dec.ctrl.conditional = !flush && (dec.ctrl.conditional || conditional); end @@ -39,11 +41,13 @@ module core_porch if(!rst_n) begin nop <= 0; // Even though it is a NOP insn <= `NOP; + abort <= 0; insn_pc <= 0; hold_dec <= {$bits(hold_dec){1'b0}}; end else if(flush || !stall) begin nop <= flush ? 1 : fetch_nop; insn <= flush ? `NOP : fetch_insn; + abort <= flush ? 0 : fetch_abort; insn_pc <= flush ? fetch_head : fetch_insn_pc; hold_dec <= fetch_dec; end |