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Continued Translation Address Cleanup of TranslationPAdrMux

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This commit is contained in:
David Harris 2021-07-17 19:16:56 -04:00
parent 6f73844427
commit d8397b5e8b
1 changed files with 7 additions and 3 deletions
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10
wally-pipelined/src/mmu/pagetablewalker.sv
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@ -121,10 +121,14 @@ module pagetablewalker
// TranslationPAdr mux // TranslationPAdr mux
if (`XLEN==32) begin // RV32 if (`XLEN==32) begin // RV32
logic [9:0] VPN1, VPN0; logic [9:0] VPN1, VPN0, VPN;
logic [`PPN_BITS-1:0] PPN;
assign VPN1 = TranslationVAdr[31:22]; assign VPN1 = TranslationVAdr[31:22];
assign VPN0 = TranslationVAdr[21:12]; assign VPN0 = TranslationVAdr[21:12];
always_comb assign VPN = ((WalkerState == LEVEL1_SET_ADR) | (WalkerState == LEVEL1_READ)) ? VPN1 : VPN0;
assign PPN = ((WalkerState == LEVEL1_SET_ADR) | (WalkerState == LEVEL1_READ)) ? BasePageTablePPN : CurrentPPN;
assign TranslationPAdr = {PPN, VPN, 2'b00};
/* always_comb
case (WalkerState) case (WalkerState)
LEVEL1_SET_ADR: TranslationPAdr = {BasePageTablePPN, VPN1, 2'b00}; LEVEL1_SET_ADR: TranslationPAdr = {BasePageTablePPN, VPN1, 2'b00};
LEVEL1_READ: TranslationPAdr = {BasePageTablePPN, VPN1, 2'b00}; LEVEL1_READ: TranslationPAdr = {BasePageTablePPN, VPN1, 2'b00};
@ -135,7 +139,7 @@ module pagetablewalker
LEVEL0: TranslationPAdr = 0; // {2'b00, TranslationVAdr[31:0]}; LEVEL0: TranslationPAdr = 0; // {2'b00, TranslationVAdr[31:0]};
LEAF: TranslationPAdr = 0; // {2'b00, TranslationVAdr[31:0]}; LEAF: TranslationPAdr = 0; // {2'b00, TranslationVAdr[31:0]};
default: TranslationPAdr = 0; // cause seg fault if this is improperly used default: TranslationPAdr = 0; // cause seg fault if this is improperly used
endcase endcase */
end else begin // RV64 end else begin // RV64
logic [8:0] VPN3, VPN2, VPN1, VPN0; logic [8:0] VPN3, VPN2, VPN1, VPN0;
assign VPN3 = TranslationVAdr[47:39]; assign VPN3 = TranslationVAdr[47:39];