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Prevented writes to SATP enabling SV57. This follows the spec more accurately. Linux can now successfully probe SATP.

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This commit is contained in:
Jacob Pease 2023-08-22 16:25:56 -05:00
parent 7505ab3f4a
commit 0f29587b0b
1 changed files with 2 additions and 1 deletions
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3
src/privileged/csrs.sv
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@ -88,7 +88,8 @@ module csrs import cvw::*; #(parameter cvw_t P) (
assign WriteSEPCM = STrapM | (CSRSWriteM & (CSRAdrM == SEPC));
assign WriteSCAUSEM = STrapM | (CSRSWriteM & (CSRAdrM == SCAUSE));
assign WriteSTVALM = STrapM | (CSRSWriteM & (CSRAdrM == STVAL));
assign WriteSATPM = CSRSWriteM & (CSRAdrM == SATP) & (PrivilegeModeW == P.M_MODE | ~STATUS_TVM);
// assign WriteSATPM = CSRSWriteM & (CSRAdrM == SATP) & (PrivilegeModeW == P.M_MODE | ~STATUS_TVM);
assign WriteSATPM = CSRSWriteM & (CSRAdrM == SATP) & (PrivilegeModeW == P.M_MODE | ~STATUS_TVM) & (CSRWriteValM[63:60] != 4'hA);
assign WriteSCOUNTERENM = CSRSWriteM & (CSRAdrM == SCOUNTEREN);
assign WriteSENVCFGM = CSRSWriteM & (CSRAdrM == SENVCFG);
assign WriteSTIMECMPM = CSRSWriteM & (CSRAdrM == STIMECMP) & STCE;