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Don't translate invalid vaddrs in the DTLB.

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Jonathan Woodruff
2021-10-14 17:13:18 +00:00
parent dad3d504b1
commit 87785eb25c
1 changed files with 7 additions and 1 deletions
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8
src_Core/RISCY_OOO/procs/lib/DTlb.bsv
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@@ -473,7 +473,13 @@ module mkDTlb#(
else if (vm_info.sv39) begin
let vpn = getVpn(r.addr);
let trans_result = tlb.translate(vpn, vm_info.asid);
if (trans_result.hit) begin
if (!validVirtualAddress(r.addr)) begin
// page fault
Exception fault = r.write ? excStorePageFault : excLoadPageFault;
pendWait[idx] <= None;
pendResp[idx] <= tuple3(?, Valid (fault), False);
if(verbose) $display("[DTLB] req invalid virtual address: idx %d; ", idx, fshow(r));
end else if (trans_result.hit) begin
// TLB hit
let entry = trans_result.entry;
// check permission