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Continued fixing fsm to work right with svmode

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This commit is contained in:
Kip Macsai-Goren 2021-06-22 13:29:49 -04:00
parent 3e19eba20d
commit 2c41da0275
1 changed files with 6 additions and 4 deletions
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10
wally-pipelined/src/mmu/pagetablewalker.sv
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@ -110,7 +110,7 @@ module pagetablewalker (
assign PageTypeF = PageType;
assign PageTypeM = PageType;
localparam LEVEL0 = 3'h0;
localparam LEVEL0 = 3'h0;
localparam LEVEL1 = 3'h1;
// space left for more levels
localparam LEAF = 3'h5;
@ -216,7 +216,7 @@ module pagetablewalker (
end else begin
localparam LEVEL2 = 3'h2;
localparam LEVEL3 = 3'h3;
logic [8:0] VPN3, VPN2, VPN1, VPN0;
logic TerapageMisaligned, GigapageMisaligned, BadTerapage, BadGigapage;
@ -263,10 +263,12 @@ module pagetablewalker (
else if (ValidPTE && LeafPTE && ~AccessAlert) NextWalkerState = LEAF;
else NextWalkerState = FAULT;
LEAF: if (MMUTranslate) NextWalkerState = LEVEL3;
LEAF: if (MMUTranslate && SvMode == `SV48) NextWalkerState = LEVEL3;
else if (MMUTranslate && SvMode == `SV39) NextWalkerState = LEVEL2;
else NextWalkerState = IDLE;
FAULT: if (MMUTranslate) NextWalkerState = LEVEL3;
FAULT: if (MMUTranslate && SvMode == `SV48) NextWalkerState = LEVEL3;
else if (MMUTranslate && SvMode == `SV39) NextWalkerState = LEVEL2;
else NextWalkerState = IDLE;
// Default case should never happen, but is included for linter.
default: NextWalkerState = IDLE;