Subversion Repositories m32632

// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

//

// This file is part of the M32632 project

// http://opencores.org/project,m32632

//

// Filename: DCACHE.v

// Version:  1.0

// Date:     30 May 2015

//

// Copyright (C) 2015 Udo Moeller

// 

// This source file may be used and distributed without 

// restriction provided that this copyright statement is not 

// removed from the file and that any derivative work contains 

// the original copyright notice and the associated disclaimer.

// 

// This source file is free software; you can redistribute it 

// and/or modify it under the terms of the GNU Lesser General 

// Public License as published by the Free Software Foundation;

// either version 2.1 of the License, or (at your option) any 

// later version. 

// 

// This source is distributed in the hope that it will be 

// useful, but WITHOUT ANY WARRANTY; without even the implied 

// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 

// PURPOSE. See the GNU Lesser General Public License for more 

// details. 

// 

// You should have received a copy of the GNU Lesser General 

// Public License along with this source; if not, download it 

// from http://www.opencores.org/lgpl.shtml 

// 

// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

//

//      Modules contained in this file:

//      DCACHE          the data cache of M32632

//

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

module DCACHE(  BCLK, MCLK,     WRCFG, MDONE, BRESET, PTB_WR, PTB_SEL, IO_READY, REG_OUT, PSR_USER, WRITE, READ, RMW,

                                WAMUX, ENWR, IC_PREQ, FILLRAM, CFG, CINVAL, DMA_AA, DP_Q, DRAM_Q, IC_VA, ICTODC, IO_Q, IVAR, MCR_FLAGS,

                                PACKET, SIZE, VADR,     WADDR, WCTRL, IO_RD, IO_WR, DRAM_ACC, DRAM_WR, INIT_RUN, PTE_STAT, KDET, HLDA,

                                ACC_STAT, DP_DI, DRAM_A, DRAM_DI, IACC_STAT, IC_SIGS, IO_A, IO_BE, IO_DI, KOLLI_A, MMU_DIN, ZTEST,

                                RWVAL, RWVFLAG, DBG_IN, DBG_HIT, ENDRAM );

input                   BCLK;

input                   MCLK;

input                   WRCFG;

input                   MDONE;

input                   BRESET;

input                   PTB_WR;

input                   PTB_SEL;

input                   IO_READY;

input                   REG_OUT;

input                   PSR_USER;

input                   WRITE;

input                   READ;

input                   ZTEST;

input                   RMW;

input                   WAMUX;

input                   ENWR;

input                   IC_PREQ;

input                   FILLRAM;

input    [1:0]   CFG;

input    [1:0]   CINVAL;

input   [27:4]  DMA_AA;

input   [63:0]   DP_Q;

input   [31:0]   DRAM_Q;

input  [31:12]  IC_VA;

input    [3:0]   ICTODC;

input   [31:0]   IO_Q;

input    [1:0]   IVAR;

input    [3:0]   MCR_FLAGS;

input    [3:0]   PACKET;

input    [1:0]   SIZE;

input   [31:0]   VADR;

input   [11:2]  WADDR;

input    [2:0]   WCTRL;

input    [2:0]   RWVAL;

input   [40:2]  DBG_IN;

input                   ENDRAM;

output                  IO_RD;

output                  IO_WR;

output                  DRAM_ACC;

output                  DRAM_WR;

output                  INIT_RUN;

output   [1:0]   PTE_STAT;

output                  KDET;

output                  HLDA;

output                  RWVFLAG;

output   [5:0]   ACC_STAT;

output  [31:0]   DP_DI;

output   [3:1]  IACC_STAT;

output   [1:0]   IC_SIGS;

output  [27:4]  KOLLI_A;

output  [23:0]   MMU_DIN;

output reg      [27:0]   DRAM_A;

output reg      [35:0]   DRAM_DI;

output reg      [31:0]   IO_A;

output reg       [3:0]   IO_BE;

output reg      [31:0]   IO_DI;

output                  DBG_HIT;

reg             [31:0]   DFFE_IOR;

reg             [31:0]   CAPDAT;

reg             [31:0]   VADR_R;

reg                             AUX_ALT;

reg                             DFF_QWEXT;

wire    [27:4]  ADDR;

wire                    ADR_EQU;

wire                    AUX_DAT;

wire                    CA_HIT;

wire                    CA_SET;

wire                    CUPDATE;

wire                    DMA_MUX;

wire     [3:0]   ENBYTE;

wire                    HIT_ALL;

wire                    INIT_CA_RUN;

wire                    IO_ACC;

wire                    IO_SPACE;

wire                    KOMUX;

wire                    MMU_HIT;

wire                    NEW_PTB;

wire                    PTB_ONE;

wire    [27:0]   PTE_ADR;

wire   [31:12]  RADR;

wire    [11:4]  TAGA;

wire    [23:0]   UPDATE_C;

wire    [31:0]   UPDATE_M;

wire                    USE_CA;

wire                    USER;

wire                    WB_ACC;

wire                    WEMV;

wire                    WR_MRAM;

wire    [31:0]   WRDATA;

wire                    VIRT_A;

wire                    PTE_MUX;

wire                    WE_CV;

wire    [23:0]   DAT_CV;

wire     [4:0]   WADR_CV;

wire                    WRSET0;

wire     [3:0]   BE_SET;

wire    [31:0]   DAT_SET;

wire     [9:0]   A_SET;

wire                    WRSET1;

wire                    SEL_PTB1;

wire                    CI;

wire    [27:0]   ADR_MX;

wire                    LD_DRAM_A;

wire                    VIRTUELL;

wire                    NEW_PTB_RUN;

wire                    KILL;

wire                    LAST_MUX;

wire    [31:0]   SET_DAT;

wire    [31:0]   ALT_DAT;

wire    [31:0]   DAT_MV;

wire     [3:0]   RADR_MV;

wire     [3:0]   WADR_MV;

wire    [31:0]   LAST_DAT;

wire                    WRCRAM0;

wire                    WRCRAM1;

wire                    PROT_ERROR;

wire                    AUX_QW;

wire                    PD_MUX;

wire    [19:0]   PTE_DAT;

wire                    PKEEP;

// +++++++++++++++++++ Memories ++++++++++++++++++++

reg              [7:0]   DATA0_D [0:1023];        // Data Set 0 : 4 kBytes

reg              [7:0]   DATA0_C [0:1023];

reg              [7:0]   DATA0_B [0:1023];

reg              [7:0]   DATA0_A [0:1023];

reg             [31:0]   SET_DAT0;

reg              [7:0]   DATA1_D [0:1023];        // Data Set 1 : 4 kBytes

reg              [7:0]   DATA1_C [0:1023];

reg              [7:0]   DATA1_B [0:1023];

reg              [7:0]   DATA1_A [0:1023];

reg             [31:0]   SET_DAT1;

reg             [15:0]   TAGSET_0 [0:255];        // Tag Set for Data Set 0 : 256 entries of 16 bits

reg             [15:0]   TAG0;

reg             [15:0]   TAGSET_1 [0:255];        // Tag Set for Data Set 1 : 256 entries of 16 bits

reg             [15:0]   TAG1;

reg             [23:0]   CA_VALID [0:31]; // Valid bits for Data Set 0 and 1 : 32 entries of 24 bits

reg             [23:0]   CVALID;

reg             [35:0]   MMU_TAGS [0:255];        // Tag Set for MMU : 256 entries of 36 bits

reg             [35:0]   MMU_Q;

reg             [31:0]   MMU_VALID [0:15];        // Valid bits for MMU Tag Set : 16 entries of 32 bits

reg             [31:0]   MVALID;

assign  ADR_EQU = ({RADR[27:12],VADR_R[11:4]} == DRAM_A[27:4]); // Limited to 256 MB

assign  ALT_DAT = AUX_ALT ? DFFE_IOR : CAPDAT ;

assign  RADR    = VIRT_A ? MMU_Q[19:0] : VADR_R[31:12] ;

assign  ADR_MX  = PTE_MUX ? PTE_ADR : {RADR[27:12],VADR_R[11:2],USE_CA,CA_SET} ;

assign  KOLLI_A = DMA_MUX ? DMA_AA : DRAM_A[27:4] ;

assign  SET_DAT = CA_SET ? SET_DAT1 : SET_DAT0 ;

assign  VIRT_A  = ~CINVAL[0] & VIRTUELL;

assign  USER    = ~MCR_FLAGS[3] & PSR_USER;

assign  DAT_SET = WRITE ? WRDATA : DRAM_Q ;

assign  BE_SET  = ENBYTE | {~WRITE,~WRITE,~WRITE,~WRITE};

assign  ADDR    = KOMUX ? KOLLI_A : {RADR[27:12],VADR_R[11:4]} ;

assign  A_SET   = WAMUX ? WADDR : VADR_R[11:2] ;

assign  TAGA    = KOMUX ? KOLLI_A[11:4] : VADR[11:4] ;

assign  INIT_RUN = NEW_PTB_RUN | INIT_CA_RUN;

assign  LAST_MUX = AUX_ALT | AUX_DAT | AUX_QW;

assign  LAST_DAT = LAST_MUX ? ALT_DAT : SET_DAT ;

assign  LD_DRAM_A = ~(DRAM_ACC | PKEEP);

assign  ACC_STAT[4] = IO_ACC;

assign  ACC_STAT[5] = CA_HIT;

always @(posedge BCLK)

        if (IO_ACC)

                begin

                        IO_BE <= ENBYTE;

                        IO_DI <= WRDATA;

                        IO_A  <= {RADR[31:12],VADR_R[11:0]};

                end

always @(posedge BCLK) if (LD_DRAM_A) DRAM_A[27:0] <= ADR_MX[27:0];

always @(posedge BCLK) if (IO_RD) DFFE_IOR <= IO_Q;

always @(posedge BCLK)

        begin

                DRAM_DI   <= {(PD_MUX ? PTE_DAT[19:16] : ENBYTE),WRDATA[31:16],

                                          (PD_MUX ? PTE_DAT[15:0]  : WRDATA[15:0])};

                AUX_ALT   <= DFF_QWEXT | IO_RD;

                DFF_QWEXT <= IO_RD & SIZE[0] & SIZE[1];

                VADR_R    <= VADR;

        end

always @(posedge MCLK) if (WCTRL[2]) CAPDAT <= DRAM_Q;

// +++++++++++++++++++++++++  Cache Valid  +++++++++++++++++++

always @(posedge BCLK) CVALID <= CA_VALID[TAGA[11:7]];

always @(negedge BCLK) if (WE_CV) CA_VALID[WADR_CV] <= DAT_CV;

// +++++++++++++++++++++++++  Tag Set 0  +++++++++++++++++++++

always @(posedge BCLK) TAG0 <= TAGSET_0[TAGA];

always @(negedge BCLK) if (WRCRAM0) TAGSET_0[VADR_R[11:4]] <= RADR[27:12];

// +++++++++++++++++++++++++  Tag Set 1  +++++++++++++++++++++

always @(posedge BCLK) TAG1 <= TAGSET_1[TAGA];

always @(negedge BCLK) if (WRCRAM1) TAGSET_1[VADR_R[11:4]] <= RADR[27:12];

// +++++++++++++++++++++++++  Data Set 0  ++++++++++++++++++++

always @(posedge BCLK)

        begin

                SET_DAT0[31:24] <= DATA0_D[VADR[11:2]];

                SET_DAT0[23:16] <= DATA0_C[VADR[11:2]];

                SET_DAT0[15:8]  <= DATA0_B[VADR[11:2]];

                SET_DAT0[7:0]    <= DATA0_A[VADR[11:2]];

        end

always @(posedge MCLK)

        if (WRSET0)

                begin

                        if (BE_SET[3]) DATA0_D[A_SET] <= DAT_SET[31:24];

                        if (BE_SET[2]) DATA0_C[A_SET] <= DAT_SET[23:16];

                        if (BE_SET[1]) DATA0_B[A_SET] <= DAT_SET[15:8];

                        if (BE_SET[0]) DATA0_A[A_SET] <= DAT_SET[7:0];

                end

// +++++++++++++++++++++++++  Data Set 1  ++++++++++++++++++++

always @(posedge BCLK)

        begin

                SET_DAT1[31:24] <= DATA1_D[VADR[11:2]];

                SET_DAT1[23:16] <= DATA1_C[VADR[11:2]];

                SET_DAT1[15:8]  <= DATA1_B[VADR[11:2]];

                SET_DAT1[7:0]    <= DATA1_A[VADR[11:2]];

        end

always @(posedge MCLK)

        if (WRSET1)

                begin

                        if (BE_SET[3]) DATA1_D[A_SET] <= DAT_SET[31:24];

                        if (BE_SET[2]) DATA1_C[A_SET] <= DAT_SET[23:16];

                        if (BE_SET[1]) DATA1_B[A_SET] <= DAT_SET[15:8];

                        if (BE_SET[0]) DATA1_A[A_SET] <= DAT_SET[7:0];

                end

DCACHE_SM       DC_SM(

        .BCLK(BCLK),

        .BRESET(BRESET),

        .VIRTUELL(VIRTUELL),

        .IO_SPACE(IO_SPACE),

        .MDONE(MDONE),

        .MMU_HIT(MMU_HIT),

        .CA_HIT(CA_HIT),

        .READ(READ),

        .WRITE(WRITE),

        .ZTEST(ZTEST),

        .RMW(RMW),

        .USE_CA(USE_CA),

        .PTB_WR(PTB_WR),

        .PTB_SEL(PTB_SEL),

        .SEL_PTB1(SEL_PTB1),

        .IO_READY(IO_READY),

        .USER(USER),

        .PROTECT(ACC_STAT[3]),

        .PROT_ERROR(PROT_ERROR),

        .ENWR(ENWR),

        .WB_ACC(WB_ACC),

        .ADR_EQU(ADR_EQU),

        .IC_PREQ(IC_PREQ),

        .CAPDAT(CAPDAT[31:0]),

        .CPU_OUT(DP_Q[59:44]),

        .FILLRAM(FILLRAM),

        .IC_VA(IC_VA),

        .ICTODC(ICTODC),

        .VADR_R(VADR_R[31:12]),

        .NEW_PTB(NEW_PTB),

        .PTB_ONE(PTB_ONE),

        .DRAM_ACC(DRAM_ACC),

        .DRAM_WR(DRAM_WR),

        .IO_ACC(IO_ACC),

        .IO_RD(IO_RD),

        .IO_WR(IO_WR),

        .PTE_STAT(PTE_STAT),

        .ABORT(ACC_STAT[1]),

        .WR_MRAM(WR_MRAM),

        .CUPDATE(CUPDATE),

        .AUX_DAT(AUX_DAT),

        .PTE_MUX(PTE_MUX),

        .ACC_OK(ACC_STAT[0]),

        .ABO_LEVEL1(ACC_STAT[2]),

        .IACC_STAT(IACC_STAT),

        .KOMUX(KOMUX),

        .KDET(KDET),

        .HIT_ALL(HIT_ALL),

        .DMA_MUX(DMA_MUX),

        .HLDA(HLDA),

        .RWVAL(RWVAL[1:0]),

        .RWVFLAG(RWVFLAG),

        .IC_SIGS(IC_SIGS),

        .MMU_DIN(MMU_DIN),

        .PD_MUX(PD_MUX),

        .PKEEP(PKEEP),

        .PTE_ADR(PTE_ADR),

        .PTE_DAT(PTE_DAT));

CA_MATCH        DCA_COMPARE(

        .INVAL_L(CINVAL[0]),

        .CI(CI),

        .MMU_HIT(MMU_HIT),

        .WRITE(WRITE),

        .KDET(KDET),

        .ADDR(ADDR),

        .CFG(CFG),

        .ENDRAM(ENDRAM),

        .CVALID(CVALID),

        .TAG0(TAG0),

        .TAG1(TAG1),

        .CA_HIT(CA_HIT),

        .CA_SET(CA_SET),

        .WB_ACC(WB_ACC),

        .USE_CA(USE_CA),

        .IOSEL(RADR[31:28]),

        .IO_SPACE(IO_SPACE),

        .KILL(KILL),

        .DC_ILO(RWVAL[2]),

        .UPDATE(UPDATE_C));

DCA_CONTROL     DCA_CTRL(

        .BCLK(BCLK),

        .MCLK(MCLK),

        .BRESET(BRESET),

        .CA_SET(CA_SET),

        .HIT_ALL(HIT_ALL),

        .UPDATE(UPDATE_C),

        .VADR_R(ADDR[11:7]),

        .DRAM_ACC(DRAM_ACC),

        .CUPDATE(CUPDATE),

        .KILL(KILL),

        .WRITE(WRITE),

        .WRCFG(WRCFG),

        .WCTRL(WCTRL[1:0]),

        .INVAL_A(CINVAL[1]),

        .DAT_CV(DAT_CV),

        .WADR_CV(WADR_CV),

        .WE_CV(WE_CV),

        .INIT_CA_RUN(INIT_CA_RUN),

        .WRCRAM0(WRCRAM0),

        .WRCRAM1(WRCRAM1),

        .WRSET0(WRSET0),

        .WRSET1(WRSET1));

MMU_MATCH       MMU_COMPARE(

        .USER(USER),

        .WRITE(WRITE),

        .READ(READ),

        .RMW(RMW),

        .IVAR(IVAR),

        .MCR_FLAGS(MCR_FLAGS[2:0]),

        .MMU_VA(MMU_Q[35:20]),

        .MVALID(MVALID),

        .VADR_R(VADR_R[31:12]),

        .MMU_HIT(MMU_HIT),

        .PROT_ERROR(PROT_ERROR),

        .VIRTUELL(VIRTUELL),

        .CI(CI),

        .SEL_PTB1(SEL_PTB1),

        .UPDATE(UPDATE_M));

MMU_UP  MMU_CTRL(

        .BCLK(BCLK),

        .BRESET(BRESET),

        .NEW_PTB(NEW_PTB),

        .IVAR(IVAR[1]),

        .PTB1(PTB_ONE),

        .WR_MRAM(WR_MRAM),

        .MVALID(MVALID),

        .UPDATE(UPDATE_M),

        .VADR(VADR[19:16]),

        .VADR_R(VADR_R[19:16]),

        .WE_MV(WEMV),

        .NEW_PTB_RUN(NEW_PTB_RUN),

        .DAT_MV(DAT_MV),

        .RADR_MV(RADR_MV),

        .WADR_MV(WADR_MV));

// +++++++++++++++++++++++++  MMU Valid  +++++++++++++++++++++

always @(posedge BCLK) MVALID <= MMU_VALID[RADR_MV];

always @(negedge BCLK) if (WEMV) MMU_VALID[WADR_MV] <= DAT_MV;

// +++++++++++++++++++++++++  MMU Tags  ++++++++++++++++++++++

always @(posedge BCLK) MMU_Q <= MMU_TAGS[VADR[19:12]];

always @(negedge BCLK) if (WR_MRAM) MMU_TAGS[VADR_R[19:12]] <= {VADR_R[31:20],MMU_DIN[23:0]};

RD_ALIGNER      RD_ALI(

        .BCLK(BCLK),

        .ACC_OK(ACC_STAT[0]),

        .REG_OUT(REG_OUT),

        .PACKET(PACKET),

        .RDDATA(LAST_DAT),

        .SIZE(SIZE),

        .CA_HIT(CA_HIT),

        .DP_DI(DP_DI),

        .AUX_QW(AUX_QW));

WR_ALIGNER      WR_ALI(

        .DP_Q(DP_Q),

        .PACKET(PACKET),

        .SIZE(SIZE),

        .ENBYTE(ENBYTE),

        .WRDATA(WRDATA));

DEBUG_AE DBGAE(

        .DBG_IN(DBG_IN),

        .READ(READ),

        .WRITE(WRITE),

        .USER(USER),

        .VIRTUELL(VIRTUELL),

        .ACC_OK(ACC_STAT[0]),

        .VADR_R(VADR_R[31:2]),

        .MMU_Q(MMU_Q[19:0]),

        .ENBYTE(ENBYTE),

        .DBG_HIT(DBG_HIT));

endmodule