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Mostly removed N_SUPPORTED

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This commit is contained in:
David Harris 2022-02-15 19:50:44 +00:00
parent ed8ac3d881
commit d8170e9dd3
3 changed files with 2 additions and 13 deletions
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9
pipelined/src/privileged/csri.sv
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@ -111,14 +111,5 @@ module csri #(parameter
SIP_REGW = 12'b0;
SIE_REGW = 12'b0;
end
// User Modes iterrupts depricated
/*if (`U_SUPPORTED & `N_SUPPORTED) begin
UIP_REGW = IP_REGW & MIDELEG_REGW & SIDELEG_REGW & 'h111; // only delegated interrupts visible
UIE_REGW = IE_REGW & MIDELEG_REGW & SIDELEG_REGW & 'h111; // only delegated interrupts visible
end else begin
UIP_REGW = 12'b0;
UIE_REGW = 12'b0;
end */
end
endmodule

5
pipelined/src/privileged/csrm.sv
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@ -146,7 +146,7 @@ module csrm #(parameter
// CSRs
flopenr #(`XLEN) MTVECreg(clk, reset, WriteMTVECM, {CSRWriteValM[`XLEN-1:2], 1'b0, CSRWriteValM[0]}, MTVEC_REGW);
if (`S_SUPPORTED | (`U_SUPPORTED & `N_SUPPORTED)) begin:deleg // DELEG registers should exist
if (`S_SUPPORTED) begin:deleg // DELEG registers should exist
flopenr #(`XLEN) MEDELEGreg(clk, reset, WriteMEDELEGM, CSRWriteValM & MEDELEG_MASK /*12'h7FF*/, MEDELEG_REGW);
flopenr #(`XLEN) MIDELEGreg(clk, reset, WriteMIDELEGM, CSRWriteValM & MIDELEG_MASK /*12'h222*/, MIDELEG_REGW);
end else assign {MEDELEG_REGW, MIDELEG_REGW} = 0;
@ -165,8 +165,7 @@ module csrm #(parameter
logic [5:0] entry;
always_comb begin
entry = '0;
IllegalCSRMAccessM = !(`S_SUPPORTED | `U_SUPPORTED & `N_SUPPORTED) &
(CSRAdrM == MEDELEG | CSRAdrM == MIDELEG); // trap on DELEG register access when no S or N-mode
IllegalCSRMAccessM = !(`S_SUPPORTED) & (CSRAdrM == MEDELEG | CSRAdrM == MIDELEG); // trap on DELEG register access when no S or N-mode
if (CSRAdrM >= PMPADDR0 & CSRAdrM < PMPADDR0 + `PMP_ENTRIES) // reading a PMP entry
CSRMReadValM = PMPADDR_ARRAY_REGW[CSRAdrM - PMPADDR0];
else if (CSRAdrM >= PMPCFG0 & CSRAdrM < PMPCFG0 + `PMP_ENTRIES/4) begin

1
pipelined/src/privileged/trap.sv
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@ -84,7 +84,6 @@ module trap (
assign TrapM = ExceptionM | InterruptM; // *** clean this up later DH
assign MTrapM = TrapM & (NextPrivilegeModeM == `M_MODE);
assign STrapM = TrapM & (NextPrivilegeModeM == `S_MODE) & `S_SUPPORTED;
assign UTrapM = TrapM & (NextPrivilegeModeM == `U_MODE) & `N_SUPPORTED;
assign RetM = mretM | sretM;
always_comb