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ControlUnit.v
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537 lines (530 loc) · 14.7 KB
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module ControlUnit (
input reset, //Reset
input interruption, //Interrupção, para o processador
input flagJB, //BRANCH
input flagCS, //Indica a troca de contexto
input [5:0] opcode, //OPCODE
output reg LED, //LED indicando leitura de valor
output reg flagMI, //Escrita na memoria de instruções
output reg flagMD, //Escrita na memoria de dados
output reg flagJR, //Jump Register
output reg flagLSR, //Load Register, Store Register
output reg flagRF, //Escrita no banco de registradores
output reg flagAddrRF, //Endereço do RF para escrita
output reg flagHALT, //Indica o fim da BIOS
output reg flagExecProc, //Executar um programa
output reg flagHD, //Controla a escrita no HD
output reg flagNumProg, //Setar o programa que está sendo executado
output reg [1:0] flagBQ, //Branches
output reg [1:0] flagSetValue, //Decide qual variável terá seu valor alterado
output reg [2:0] flagPC, //Incremento no endereço da memoria de instruçoes
output reg [2:0] flagMuxRF, //Decide qual dado será escrito na banco de registradores
//REDES
output reg flagSend, //Enviar dado para o Arduino
output reg flagSOControl, //SO controla as execuçoes de rede
output reg flagReceive
);
localparam [5:0] ALU = 6'd0, LW = 6'd1, LI = 6'd2, LR = 6'd3, SW = 6'd4, SR = 6'd5,
BEQ = 6'd6, BNQ = 6'd7, JMP = 6'd8, JR = 6'd9, NOP = 6'd10,
HLT = 6'd11, IN = 6'd12, OUT = 6'd13, DELAY = 6'd14,
//Novas instruções
HD_TRANSFER_MI = 6'd15, SAVE_RF_HD = 6'd16, REC_RF_HD = 6'd17,
SAVE_RF_HD_IND = 6'd18, REC_RF_HD_IND = 6'd19, SET_MULTIPROG = 6'd20,
SET_QUANTUM = 6'd21, SET_ADDR_CS = 6'd22, SET_NUM_PROG = 6'd23,
EXEC_PROCESS = 6'd24, GET_PC_PROCESS = 6'd25,
//Receive and Send
SEND = 6'd26, RECEIVE = 6'd27, SEND_SO = 6'd28, RECEIVE_SO = 6'd29;
//HD_LOAD_MI = 6'd15, HD_LOAD_MD = 6'd16, HD_STORE = 6'd17,
//SET_MULTIPROG = 6'd18, SET_QUANTUM = 6'd19, SET_ADDR_CS = 6'd20,
//SET_NUM_PROG = 6'd21, EXEC_PROCESS = 6'd22, GET_PC_PROCESS = 6'd23;
//----------------------------------------------------------------------------------------------//
//------------------------ Controlar as instrucoes de send e receive ---------------------------//
// SEND ----------------------------------------------------------------------------------------//
// RECEIVE -------------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagSOControl = 0;
else if((opcode == SEND) || (opcode == RECEIVE))
flagSOControl = 1;
else
flagSOControl = 0;
end
//----------------------------------------------------------------------------------------------//
//------------------------ Transferir dados Arduino para Processador ---------------------------//
// SEND_SO -------------------------------------------------------------------------------------//
// RECEIVE_SO ----------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagSend = 0;
else if(opcode == SEND_SO)
flagSend = 1;
else
flagSend = 0;
end
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagReceive = 0;
else if(opcode == RECEIVE_SO)
flagReceive = 1;
else
flagReceive = 0;
end
//----------------------------------------------------------------------------------------------//
//------------------------ Transferir dados para a Memória de Instruções -----------------------//
// HD_TRANSFER_MI ------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagMI = 0;
else if(opcode == HD_TRANSFER_MI)
flagMI = 1;
else
flagMI = 0;
end
//----------------------------------------------------------------------------------------------//
//------------------------------------------ HD ------------------------------------------------//
// SAVE_RF_HD ----------------------------------------------------------------------------------//
// SAVE_RF_HD_IND ------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagHD = 0;
else if((opcode == SAVE_RF_HD) || (opcode == SAVE_RF_HD_IND))
flagHD = 1;
else
flagHD = 0;
end
//----------------------------------------------------------------------------------------------//
//----------------------------------------- HALT -----------------------------------------------//
// HLT -----------------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagHALT = 0;
else if(opcode == HLT)
flagHALT = 1;
else
flagHALT = 0;
end
//----------------------------------------------------------------------------------------------//
//-------------------------------- Executar processo -------------------------------------------//
// EXEC_PROCESS --------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagExecProc = 0;
else if(opcode == EXEC_PROCESS)
flagExecProc = 1;
else
flagExecProc = 0;
end
//----------------------------------------------------------------------------------------------//
//------------------------- Setar valores para multiprogramação --------------------------------//
// SET_QUANTUM ---------------------------------------------------------------------------------//
// SET_MULTIPROG -------------------------------------------------------------------------------//
// SET_ADDR_CS ---------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagSetValue = 2'd0;
else if(opcode == SET_QUANTUM)
flagSetValue = 2'd1;
else if(opcode == SET_MULTIPROG)
flagSetValue = 2'd2;
else if(opcode == SET_ADDR_CS)
flagSetValue = 2'd3;
else
flagSetValue = 2'd0;
end
//----------------------------------------------------------------------------------------------//
//------------------------- Apresentar no LCD o programa em execução ---------------------------//
// SET_NUM_PROG --------------------------------------------------------------------------------//
//----------------------------------------------------------------------------------------------//
always@(*) begin
if((reset == 1) || (interruption == 1) || (flagCS == 1))
flagNumProg = 0;
else if(opcode == SET_NUM_PROG)
flagNumProg = 1;
else
flagNumProg = 0;
end
//----------------------------------------------------------------------------------------------//
//----------------------------------- Demais instruções ----------------------------------------//
//----------------------------------------------------------------------------------------------//
always@ (*) begin
if((reset == 1) || (interruption == 1)) begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd0;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
else if(flagCS == 1) begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd2;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
else begin
case (opcode)
ALU: begin //Operações lógicas e aritméticas
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd1;
end
LW: begin //Load Word
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd2;
end
LI: begin //LOADI
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd4;
end
LR: begin //LOADR
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 1;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd2;
end
SW: begin //Store Word
LED = 0;
flagMD = 1;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
SR: begin //STORER
LED = 0;
flagMD = 1;
flagJR = 0;
flagLSR = 1;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
BEQ: begin //Branch Equal
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagBQ = 2'd1;
flagMuxRF = 3'd0;
if(flagJB == 1)
flagPC = 3'd2;
else flagPC = 3'd1;
end
BNQ: begin //Branch Not Equal
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagBQ = 2'd2;
flagMuxRF = 3'd0;
if(flagJB == 1)
flagPC = 3'd2;
else flagPC = 3'd1;
end
JMP: begin //Jump
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd2;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
JR: begin //Jump register
LED = 0;
flagMD = 0;
flagJR = 1;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd2;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
NOP: begin //No operation
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
HLT: begin //HALT
//LED = 0;
LED = 1;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd2;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
IN: begin //IN
LED = 1;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd3;
end
OUT: begin //OUT
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
DELAY: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd3;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
HD_TRANSFER_MI: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
SAVE_RF_HD: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
REC_RF_HD: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd6;
end
SAVE_RF_HD_IND: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 1;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
REC_RF_HD_IND: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 1;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd6;
end
SET_MULTIPROG: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
SET_QUANTUM: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
SET_ADDR_CS: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
SET_NUM_PROG: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
EXEC_PROCESS: begin
LED = 0;
flagMD = 0;
flagJR = 1;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd2;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
GET_PC_PROCESS: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd5;
end
SEND: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd0;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
RECEIVE: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd0;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
SEND_SO: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
RECEIVE_SO: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 1;
flagAddrRF = 0;
flagPC = 3'd1;
flagBQ = 2'd0;
flagMuxRF = 3'd7;
end
default: begin
LED = 0;
flagMD = 0;
flagJR = 0;
flagLSR = 0;
flagRF = 0;
flagAddrRF = 0;
flagPC = 3'd0;
flagBQ = 2'd0;
flagMuxRF = 3'd0;
end
endcase
end
end
endmodule