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mmu cleanup

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This commit is contained in:
David Harris 2023-01-14 17:49:10 -08:00
parent 939bf3f148
commit 7c5548a39c
1 changed files with 10 additions and 10 deletions
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20
pipelined/src/mmu/adrdec.sv
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@ -27,17 +27,17 @@
`include "wally-config.vh"
module adrdec (
input logic [`PA_BITS-1:0] PhysicalAddress,
input logic [`PA_BITS-1:0] Base, Range,
input logic Supported,
input logic AccessValid,
input logic [1:0] Size,
input logic [3:0] SizeMask,
output logic Sel
input logic [`PA_BITS-1:0] PhysicalAddress, // Physical address to decode
input logic [`PA_BITS-1:0] Base, Range, // Base and range of peripheral addresses
input logic Supported, // Is this peripheral supported?
input logic AccessValid, // Is the access type valid?
input logic [1:0] Size, // Size of access
input logic [3:0] SizeMask, // List of supported sizes: 0 = 8, 1 = 16, 2 = 32, 3 = 64-bit
output logic Sel // Decoder selects this peripheral
);
logic Match;
logic SizeValid;
logic Match; // Address matches in range
logic SizeValid; // Size of access is valid
// determine if an address is in a range starting at the base
// for example, if Base = 0x04002000 and range = 0x00000FFF,
@ -47,7 +47,7 @@ module adrdec (
// determine if legal size of access is being made (byte, halfword, word, doubleword)
assign SizeValid = SizeMask[Size];
// Select this peripheral if the address matches, the peripheral is supported, and the type and size of access is ok
assign Sel = Match & Supported & AccessValid & SizeValid;
endmodule