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Another round of cleanup in the LSU.

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Ross Thompson 2023-01-23 17:27:39 -06:00
parent a60a1756a4
commit af6899472d
1 changed files with 85 additions and 85 deletions
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pipelined/src/lsu/lsu.sv
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@ -32,107 +32,107 @@
`include "wally-config.vh"
module lsu (
input logic clk, reset,
input logic StallM, FlushM, StallW, FlushW,
output logic LSUStallM, // LSU stalls pipeline during a multicycle operation
input logic clk,set,
input logic StallM,ushM, StallW, FlushW,
output logic LSUStallM, // LSU stalls pipeline during a multicycle operation
// connected to cpu (controls)
input logic [1:0] MemRWM, // Read/Write control
input logic [2:0] Funct3M, // Size of memory operation
input logic [6:0] Funct7M, // Atomic memory operation function
input logic [1:0] AtomicM, // Atomic memory operation
input logic FlushDCacheM, // Flush D cache to next level of memory
output logic CommittedM, // Delay interrupts while memory operation in flight
output logic SquashSCW, // Store conditional failed disable write to GPR
output logic DCacheMiss, // D cache miss for performance counters
output logic DCacheAccess, // D cache memory access for performance counters
input logic [1:0] MemRWM, // Read/Write control
input logic [2:0] Funct3M, // Size of memory operation
input logic [6:0] Funct7M, // Atomic memory operation function
input logic [1:0] AtomicM, // Atomic memory operation
input logic FlushDCacheM, // Flush D cache to next level of memory
output logic CommittedM, // Delay interrupts while memory operation in flight
output logic SquashSCW, // Store conditional failed disable write to GPR
output logic DCacheMiss, // D cache miss for performance counters
output logic DCacheAccess, // D cache memory access for performance counters
// address and write data
input logic [`XLEN-1:0] IEUAdrE, // Execution stage memory address
output logic [`XLEN-1:0] IEUAdrM, // Memory stage memory address
input logic [`XLEN-1:0] WriteDataM, // Write data from IEU
output logic [`LLEN-1:0] ReadDataW, // Read data to IEU or FPU
input logic [`XLEN-1:0] IEUAdrE, // Execution stage memory address
output logic [`XLEN-1:0] IEUAdrM, // Memory stage memory address
input logic [`XLEN-1:0] WriteDataM, // Write data from IEU
output logic [`LLEN-1:0] ReadDataW, // Read data to IEU or FPU
// cpu privilege
input logic [1:0] PrivilegeModeW, // Current privilege mode
input logic BigEndianM, // Swap byte order to big endian
input logic sfencevmaM, // Virtual memory address fence, invalidate TLB entries
input logic [1:0] PrivilegeModeW, // Current privilege mode
input logic BigEndianM, // Swap byte order to big endian
input logic sfencevmaM, // Virtual memory address fence, invalidate TLB entries
// fpu
input logic [`FLEN-1:0] FWriteDataM, // Write data from FPU
input logic FpLoadStoreM, // Selects FPU as store for write data
input logic [`FLEN-1:0] FWriteDataM, // Write data from FPU
input logic FpLoadStoreM, // Selects FPU as store for write data
// faults
output logic LoadPageFaultM, StoreAmoPageFaultM, // Page fault exceptions
output logic LoadMisalignedFaultM, // Load address misaligned fault
output logic LoadAccessFaultM, // Load access fault (PMA)
output logic HPTWInstrAccessFaultM, // HPTW generated access fault during instruction fetch
output logic LoadPageFaultM,oreAmoPageFaultM, // Page fault exceptions
output logic LoadMisalignedFaultM, // Load address misaligned fault
output logic LoadAccessFaultM, // Load access fault (PMA)
output logic HPTWInstrAccessFaultM, // HPTW generated access fault during instruction fetch
// cpu hazard unit (trap)
output logic StoreAmoMisalignedFaultM, // Store or AMO address misaligned fault
output logic StoreAmoAccessFaultM, // Store or AMO access fault
// connect to ahb
output logic [`PA_BITS-1:0] LSUHADDR, // Bus address from LSU to EBU
input logic [`XLEN-1:0] HRDATA, // Bus read data from LSU to EBU
output logic [`XLEN-1:0] LSUHWDATA, // Bus write data from LSU to EBU
input logic LSUHREADY, // Bus ready from LSU to EBU
output logic LSUHWRITE, // Bus write operation from LSU to EBU
output logic [2:0] LSUHSIZE, // Bus operation size from LSU to EBU
output logic [2:0] LSUHBURST, // Bus burst from LSU to EBU
output logic [1:0] LSUHTRANS, // Bus transaction type from LSU to EBU
output logic [`XLEN/8-1:0] LSUHWSTRB, // Bus byte write enables from LSU to EBU
// page table walker
input logic [`XLEN-1:0] SATP_REGW, // SATP (supervisor address translation and protection) CSR
input logic STATUS_MXR, STATUS_SUM, STATUS_MPRV, // STATUS CSR bits: make executable readable, supervisor user memory, machine privilege
input logic [1:0] STATUS_MPP, // Machine previous privilege mode
input logic [`XLEN-1:0] PCF, // Fetch PC
input logic ITLBMissF, // ITLB miss causes HPTW (hardware pagetable walker) walk
input logic InstrDAPageFaultF, // ITLB hit needs to update dirty or access bits
output logic [`XLEN-1:0] PTE, // Page table entry write to ITLB
output logic [1:0] PageType, // Type of page table entry to write to ITLB
output logic ITLBWriteF, // Write PTE to ITLB
output logic SelHPTW, // During a HPTW walk the effective privilege mode becomes S_MODE
input var logic [7:0] PMPCFG_ARRAY_REGW[`PMP_ENTRIES-1:0], // PMP configuration from privileged unit
output logic StoreAmoMisalignedFaultM, // Store or AMO address misaligned fault
output logic StoreAmoAccessFaultM, // Store or AMO access fault
// connect to ahb
output logic [`PA_BITS-1:0] LSUHADDR, // Bus address from LSU to EBU
input logic [`XLEN-1:0] HRDATA, // Bus read data from LSU to EBU
output logic [`XLEN-1:0] LSUHWDATA, // Bus write data from LSU to EBU
input logic LSUHREADY, // Bus ready from LSU to EBU
output logic LSUHWRITE, // Bus write operation from LSU to EBU
output logic [2:0] LSUHSIZE, // Bus operation size from LSU to EBU
output logic [2:0] LSUHBURST, // Bus burst from LSU to EBU
output logic [1:0] LSUHTRANS, // Bus transaction type from LSU to EBU
output logic [`XLEN/8-1:0] LSUHWSTRB, // Bus byte write enables from LSU to EBU
// page table walker
input logic [`XLEN-1:0] SATP_REGW, // SATP (supervisor address translation and protection) CSR
input logic STATUS_MXR,ATUS_SUM, STATUS_MPRV, // STATUS CSR bits: make executable readable, supervisor user memory, machine privilege
input logic [1:0] STATUS_MPP, // Machine previous privilege mode
input logic [`XLEN-1:0] PCF, // Fetch PC
input logic ITLBMissF, // ITLB miss causes HPTW (hardware pagetable walker) walk
input logic InstrDAPageFaultF, // ITLB hit needs to update dirty or access bits
output logic [`XLEN-1:0] PTE, // Page table entry write to ITLB
output logic [1:0] PageType, // Type of page table entry to write to ITLB
output logic ITLBWriteF, // Write PTE to ITLB
output logic SelHPTW, // During a HPTW walk the effective privilege mode becomes S_MODE
input var logic [7:0] PMPCFG_ARRAY_REGW[P_ENTRIES-1:0], // PMP configuration from privileged unit
input var logic [`XLEN-1:0] PMPADDR_ARRAY_REGW[`PMP_ENTRIES-1:0] // PMP address from privileged unit
);
logic [`XLEN+1:0] IEUAdrExtM; // Memory stage address zero-extended to PA_BITS or XLEN whichever is longer
logic [`XLEN+1:0] IEUAdrExtE; // Execution stage address zero-extended to PA_BITS or XLEN whichever is longer
logic [`PA_BITS-1:0] PAdrM; // Physical memory address
logic [`XLEN+1:0] IHAdrM; // Either IEU or HPTW memory address
logic [`XLEN+1:0] IEUAdrExtM; // Memory stage address zero-extended to PA_BITS or XLEN whichever is longer
logic [`XLEN+1:0] IEUAdrExtE; // Execution stage address zero-extended to PA_BITS or XLEN whichever is longer
logic [`PA_BITS-1:0] PAdrM; // Physical memory address
logic [`XLEN+1:0] IHAdrM; // Either IEU or HPTW memory address
logic [1:0] PreLSURWM; // IEU or HPTW Read/Write signal
logic [1:0] LSURWM; // IEU or HPTW Read/Write signal gated by LR/SC
logic [2:0] LSUFunct3M; // IEU or HPTW memory operation size
logic [6:0] LSUFunct7M; // AMO function gated by HPTW
logic [1:0] LSUAtomicM; // AMO signal gated by HPTW
logic [1:0] PreLSURWM; // IEU or HPTW Read/Write signal
logic [1:0] LSURWM; // IEU or HPTW Read/Write signal gated by LR/SC
logic [2:0] LSUFunct3M; // IEU or HPTW memory operation size
logic [6:0] LSUFunct7M; // AMO function gated by HPTW
logic [1:0] LSUAtomicM; // AMO signal gated by HPTW
logic GatedStallW; // Hazard unit StallW gated when SelHPTW = 1
logic GatedStallW; // Hazard unit StallW gated when SelHPTW = 1
logic DCacheStallM; // D$ busy with multicycle operation
logic BusStall; // Bus interface busy with multicycle operation
logic HPTWStall; // HPTW busy with multicycle operation
logic DCacheStallM; // D$ busy with multicycle operation
logic BusStall; // Bus interface busy with multicycle operation
logic HPTWStall; // HPTW busy with multicycle operation
logic CacheableM; // PMA indicates memory address is cacheable
logic BusCommittedM; // Bus memory operation in flight, delay interrupts
logic DCacheCommittedM; // D$ memory operation started, delay interrupts
logic CacheableM; // PMA indicates memory address is cacheable
logic BusCommittedM; // Bus memory operation in flight, delay interrupts
logic DCacheCommittedM; // D$ memory operation started, delay interrupts
logic [`LLEN-1:0] DTIMReadDataWordM; // DTIM read data
logic [`LLEN-1:0] DCacheReadDataWordM; // D$ read data
logic [`LLEN-1:0] ReadDataWordMuxM; // DTIM or D$ read data
logic [`LLEN-1:0] LittleEndianReadDataWordM; // Endian-swapped read data
logic [`LLEN-1:0] ReadDataWordM; // Read data before subword selection
logic [`LLEN-1:0] ReadDataM; // Final read data
logic [`LLEN-1:0] DTIMReadDataWordM; // DTIM read data
logic [`LLEN-1:0] DCacheReadDataWordM; // D$ read data
logic [`LLEN-1:0] ReadDataWordMuxM; // DTIM or D$ read data
logic [`LLEN-1:0] LittleEndianReadDataWordM; // Endian-swapped read data
logic [`LLEN-1:0] ReadDataWordM; // Read data before subword selection
logic [`LLEN-1:0] ReadDataM; // Final read data
logic [`XLEN-1:0] IHWriteDataM; // IEU or HPTW write data
logic [`XLEN-1:0] IMAWriteDataM; // IEU, HPTW, or AMO write data
logic [`LLEN-1:0] IMAFWriteDataM; // IEU, HPTW, AMO, or FPU write data
logic [`LLEN-1:0] LittleEndianWriteDataM; // Ending-swapped write data
logic [`LLEN-1:0] LSUWriteDataM; // Final write data
logic [(`LLEN-1)/8:0] ByteMaskM; // Selects which bytes within a word to write
logic [`XLEN-1:0] IHWriteDataM; // IEU or HPTW write data
logic [`XLEN-1:0] IMAWriteDataM; // IEU, HPTW, or AMO write data
logic [`LLEN-1:0] IMAFWriteDataM; // IEU, HPTW, AMO, or FPU write data
logic [`LLEN-1:0] LittleEndianWriteDataM; // Ending-swapped write data
logic [`LLEN-1:0] LSUWriteDataM; // Final write data
logic [(`LLEN-1)/8:0] ByteMaskM; // Selects which bytes within a word to write
logic DTLBMissM; // DTLB miss causes HPTW walk
logic DTLBWriteM; // Writes PTE and PageType to DTLB
logic DataDAPageFaultM; // DTLB hit needs to update dirty or access bits
logic LSULoadAccessFaultM; // Load acces fault
logic LSUStoreAmoAccessFaultM; // Store access fault
logic IgnoreRequestTLB; // On either ITLB or DTLB miss, ignore miss so HPTW can handle
logic IgnoreRequest; // On FlushM or TLB miss ignore memory operation
logic SelDTIM; // Select DTIM rather than bus or D$
logic DTLBMissM; // DTLB miss causes HPTW walk
logic DTLBWriteM; // Writes PTE and PageType to DTLB
logic DataDAPageFaultM; // DTLB hit needs to update dirty or access bits
logic LSULoadAccessFaultM; // Load acces fault
logic LSUStoreAmoAccessFaultM; // Store access fault
logic IgnoreRequestTLB; // On either ITLB or DTLB miss, ignore miss so HPTW can handle
logic IgnoreRequest; // On FlushM or TLB miss ignore memory operation
logic SelDTIM; // Select DTIM rather than bus or D$
/////////////////////////////////////////////////////////////////////////////////////////////