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added inputs to pmaadrdec

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This commit is contained in:
David Harris 2021-06-17 18:54:39 -04:00
parent da8eb7749f
commit 54b6a2dcad
2 changed files with 14 additions and 11 deletions
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7
wally-pipelined/src/mmu/pmaadrdec.sv
View File

@ -29,6 +29,9 @@ module pmaadrdec (
input logic [31:0] HADDR,
input logic [31:0] Base, Range,
input logic Supported,
input logic AccessValid,
input logic [2:0] Size,
input logic [3:0] SizeMask,
output logic HSEL
);
@ -38,8 +41,8 @@ module pmaadrdec (
// for example, if Base = 0x04002000 and range = 0x00000FFF,
// then anything address between 0x04002000 and 0x04002FFF should match (HSEL=1)
assign match = (HADDR ~^ Base) | Range;
assign HSEL = &match & Supported;
assign match = &((HADDR ~^ Base) | Range);
assign HSEL = match & Supported;
endmodule

18
wally-pipelined/src/mmu/pmachecker.sv
View File

@ -64,20 +64,20 @@ module pmachecker (
// Determine which region of physical memory (if any) is being accessed
pmaadrdec boottimdec(HADDR, `BOOTTIMBASE, `BOOTTIMRANGE, `BOOTTIMSUPPORTED, BootTim);
pmaadrdec timdec(HADDR, `TIMBASE, `TIMRANGE, `TIMSUPPORTED, Tim);
pmaadrdec clintdec(HADDR, `CLINTBASE, `CLINTRANGE, `CLINTSUPPORTED, CLINT);
pmaadrdec gpiodec(HADDR, `GPIOBASE, `GPIORANGE, `GPIOSUPPORTED, GPIO);
pmaadrdec uartdec(HADDR, `UARTBASE, `UARTRANGE, `UARTSUPPORTED, UART);
pmaadrdec plicdec(HADDR, `PLICBASE, `PLICRANGE, `PLICSUPPORTED, PLIC);
pmaadrdec boottimdec(HADDR, `BOOTTIMBASE, `BOOTTIMRANGE, `BOOTTIMSUPPORTED, AccessRX, Size, 4'b1111, BootTim);
pmaadrdec timdec(HADDR, `TIMBASE, `TIMRANGE, `TIMSUPPORTED, AccessRWX, Size, 4'b1111, Tim);
pmaadrdec clintdec(HADDR, `CLINTBASE, `CLINTRANGE, `CLINTSUPPORTED, AccessRW, Size, (`XLEN==64 ? 4'b1000 : 4'b0100), CLINT);
pmaadrdec gpiodec(HADDR, `GPIOBASE, `GPIORANGE, `GPIOSUPPORTED, AccessRW, Size, 4'b0100, GPIO);
pmaadrdec uartdec(HADDR, `UARTBASE, `UARTRANGE, `UARTSUPPORTED, AccessRW, Size, 4'b0001, UART);
pmaadrdec plicdec(HADDR, `PLICBASE, `PLICRANGE, `PLICSUPPORTED, AccessRW, Size, 4'b0100, PLIC);
// Swizzle region bits
assign Regions = {BootTim, Tim, CLINT, GPIO, UART, PLIC};
// Only RAM memory regions are cacheable
assign Cacheable = BootTim | Tim;
assign Idempotent = BootTim | Tim;
assign AtomicAllowed = BootTim | Tim;
assign Idempotent = Tim;
assign AtomicAllowed = Tim;
assign ValidBootTim = '1;
assign ValidTim = '1;
@ -98,9 +98,9 @@ module pmachecker (
assign PMAAccessFault = ~|HSELRegions;
// Detect access faults
assign PMAInstrAccessFaultF = ExecuteAccessF && PMAAccessFault;
assign PMALoadAccessFaultM = ReadAccessM && PMAAccessFault;
assign PMAStoreAccessFaultM = WriteAccessM && PMAAccessFault;
assign PMASquashBusAccess = PMAAccessFault && AccessRWX;
endmodule