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[rtl] Stop regfile writeback for load errors

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- A data or PMP error should stop the register file from being updated
- Fixes #832

Signed-off-by: Tom Roberts <tomroberts@lowrisc.org>
This commit is contained in:
Tom Roberts 2020-05-01 10:41:04 +01:00 • committed by Tom Roberts
parent 9451df2965
commit 15ab023e25
1 changed files with 1 additions and 1 deletions
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2
rtl/ibex_load_store_unit.sv
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@ -476,7 +476,7 @@ module ibex_load_store_unit
assign data_or_pmp_err = lsu_err_q | data_err_i | pmp_err_q;
assign lsu_resp_valid_o = (data_rvalid_i | pmp_err_q) & (ls_fsm_cs == IDLE);
assign lsu_rdata_valid_o = lsu_resp_valid_o & ~data_we_q;
assign lsu_rdata_valid_o = (ls_fsm_cs == IDLE) & data_rvalid_i & ~data_or_pmp_err & ~data_we_q;
// output to register file
assign lsu_rdata_o = data_rdata_ext;