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Fix issue 444 by preventing delegation of misaligned instructions when compressed instructions are supported.

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David Harris 2023-10-30 07:06:34 -07:00
parent 09c4aaa5d9
commit 27b8ebb9bd
1 changed files with 2 additions and 1 deletions
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src/privileged/csrm.sv
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@ -94,7 +94,8 @@ module csrm import cvw::*; #(parameter cvw_t P) (
localparam DSCRATCH1 = 12'h7B3;
// Constants
localparam ZERO = {(P.XLEN){1'b0}};
localparam MEDELEG_MASK = 16'hB3FF;
// when C is supported, there can't be misaligned instructions
localparam MEDELEG_MASK = P.C_SUPPORTED ? 16'hB3FE : 16'hB3FF;
localparam MIDELEG_MASK = 12'h222; // we choose to not make machine interrupts delegable
// There are PMP_ENTRIES = 0, 16, or 64 PMPADDR registers, each of which has its own flop