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dmitryr |
`timescale 1ns / 1ps
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//////////////////////////////////////////////////////////////////////////////////
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// Company: (C) Athree, 2009
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// Engineer: Dmitry Rozhdestvenskiy
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// Email dmitry.rozhdestvenskiy@srisc.com dmitryr@a3.spb.ru divx4log@narod.ru
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//
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// Design Name: Bridge from SPARC Core to Wishbone Master
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// Module Name: os2wb
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// Project Name: SPARC SoC single-core
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//
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// LICENSE:
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// This is a Free Hardware Design; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// version 2 as published by the Free Software Foundation.
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// The above named program is distributed in the hope that it will
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// be useful, but WITHOUT ANY WARRANTY; without even the implied
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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//////////////////////////////////////////////////////////////////////////////////
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module os2wb_dual(
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input clk,
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input rstn,
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// Core interface
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input [ 4:0] pcx_req,
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input pcx_atom,
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input [123:0] pcx_data,
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output reg [ 4:0] pcx_grant,
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output reg cpx_ready,
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output reg [144:0] cpx_packet,
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// Core 2nd interface
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input [ 4:0] pcx1_req,
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input pcx1_atom,
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input [123:0] pcx1_data,
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output reg [ 4:0] pcx1_grant,
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output reg cpx1_ready,
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output reg [144:0] cpx1_packet,
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// Wishbone master interface
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input [ 63:0] wb_data_i,
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input wb_ack,
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output reg wb_cycle,
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output reg wb_strobe,
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output reg wb_we,
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output reg [ 7:0] wb_sel,
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output reg [ 63:0] wb_addr,
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output reg [ 63:0] wb_data_o,
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// FPU interface
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output reg [123:0] fp_pcx,
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output reg fp_req,
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input [144:0] fp_cpx,
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input fp_rdy,
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// Ethernet interrupt, sensed on posedge, mapped to vector 'd29
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input eth_int
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);
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reg [123:0] pcx_packet_d; // Latched incoming PCX packet
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reg [123:0] pcx_packet_2nd; // Second packet for atomic (CAS)
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reg [ 4:0] pcx_req_d; // Latched request
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reg pcx_atom_d; // Latched atomic flasg
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reg [ 4:0] state; // FSM state
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reg [144:0] cpx_packet_1; // First CPX packet
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reg [144:0] cpx_packet_2; // Second CPX packet (for atomics and cached IFILLs)
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reg cpx_two_packet; // CPX answer is two-packet (!=atomic, SWAP has atomic==0 and answer is two-packet)
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wire [111:0] inval_vect0; // Invalidate, instr/data, way
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wire [111:0] inval_vect1; // IFill may cause two D lines invalidation at a time
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wire [1:0] othercachehit;
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wire [1:0] othercpuhit;
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wire [1:0] wayval0;
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wire [1:0] wayval1;
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`define TEST_DRAM_1 5'b00000
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`define TEST_DRAM_2 5'b00001
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`define TEST_DRAM_3 5'b00010
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`define TEST_DRAM_4 5'b00011
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`define INIT_DRAM_1 5'b00100
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`define INIT_DRAM_2 5'b00101
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`define WAKEUP 5'b00110
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`define PCX_IDLE 5'b00111
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`define GOT_PCX_REQ 5'b01000
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`define PCX_REQ_2ND 5'b01001
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`define PCX_REQ_STEP1 5'b01010
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`define PCX_REQ_STEP1_1 5'b01011
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`define PCX_REQ_STEP2 5'b01100
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`define PCX_REQ_STEP2_1 5'b01101
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`define PCX_REQ_STEP3 5'b01110
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`define PCX_REQ_STEP3_1 5'b01111
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`define PCX_REQ_STEP4 5'b10000
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`define PCX_REQ_STEP4_1 5'b10001
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`define PCX_BIS 5'b10010
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`define PCX_BIS_1 5'b10011
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`define PCX_BIS_2 5'b10100
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`define CPX_READY_1 5'b10101
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`define CPX_READY_2 5'b10110
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`define PCX_REQ_STEP1_2 5'b10111
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`define PCX_UNKNOWN 5'b11000
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`define PCX_FP_1 5'b11001
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`define PCX_FP_2 5'b11010
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`define FP_WAIT 5'b11011
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`define CPX_FP 5'b11100
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`define CPX_SEND_ETH_IRQ 5'b11101
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`define CPX_INT_VEC_DIS 5'b11110
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`define PCX_REQ_CAS_COMPARE 5'b11111
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`define MEM_SIZE 64'h00000000_10000000
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`define TEST_DRAM 1
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`define DEBUGGING 1
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reg cache_init;
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wire [3:0] dcache0_hit;
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wire [3:0] dcache1_hit;
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wire [3:0] icache_hit;
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reg multi_hit;
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reg multi_hit1;
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reg eth_int_d;
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reg eth_int_send;
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reg eth_int_sent;
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reg [3:0] cnt;
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// PCX channel FIFO
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wire [129:0] pcx_data_fifo;
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wire pcx_fifo_empty;
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reg [ 4:0] pcx_req_1;
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reg [ 4:0] pcx_req_2;
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reg pcx_atom_1;
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reg pcx_atom_2;
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reg pcx_data_123_d;
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// PCX 2nf channel FIFO
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wire [129:0] pcx1_data_fifo;
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wire pcx1_fifo_empty;
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reg [ 4:0] pcx1_req_1;
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reg [ 4:0] pcx1_req_2;
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reg pcx1_atom_1;
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reg pcx1_atom_2;
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reg pcx1_data_123_d;
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always @(posedge clk)
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begin
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pcx_req_1<=pcx_req;
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pcx_atom_1<=pcx_atom;
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pcx_atom_2<=pcx_atom_1;
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pcx_req_2<=pcx_atom_1 ? pcx_req_1:5'b0;
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pcx_grant<=(pcx_req_1 | pcx_req_2);
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pcx_data_123_d<=pcx_data[123];
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pcx1_req_1<=pcx1_req;
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pcx1_atom_1<=pcx1_atom;
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pcx1_atom_2<=pcx1_atom_1;
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pcx1_req_2<=pcx1_atom_1 ? pcx1_req_1:5'b0;
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pcx1_grant<=(pcx1_req_1 | pcx1_req_2);
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pcx1_data_123_d<=pcx1_data[123];
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end
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pcx_fifo pcx_fifo_inst(
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// FIFO should be first word fall-through
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// It has no full flag as the core will send only limited number of requests,
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// in original design we used it 32 words deep
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// Just make it deeper if you experience overflow -
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// you can't just send no grant on full because the core expects immediate
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// grant for at least two requests for each zone
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.aclr(!rstn),
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.clock(clk),
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.data({pcx_atom_1,pcx_req_1,pcx_data}),
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.rdreq(fifo_rd),
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.wrreq((pcx_req_1!=5'b00000 && pcx_data[123]) || (pcx_atom_2 && pcx_data_123_d)),
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// Second atomic packet for FPU may be invalid, but should be sent to FPU
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// so if the first atomic packet is valid we latch both
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.empty(pcx_fifo_empty),
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.q(pcx_data_fifo)
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);
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pcx_fifo pcx_fifo_inst1(
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// FIFO should be first word fall-through
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// It has no full flag as the core will send only limited number of requests,
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// in original design we used it 32 words deep
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// Just make it deeper if you experience overflow -
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// you can't just send no grant on full because the core expects immediate
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// grant for at least two requests for each zone
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.aclr(!rstn),
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.clock(clk),
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.data({pcx1_atom_1,pcx1_req_1,pcx1_data}),
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.rdreq(fifo_rd1),
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.wrreq((pcx1_req_1!=5'b00000 && pcx1_data[123]) || (pcx1_atom_2 && pcx1_data_123_d)),
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// Second atomic packet for FPU may be invalid, but should be sent to FPU
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// so if the first atomic packet is valid we latch both
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.empty(pcx1_fifo_empty),
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.q(pcx1_data_fifo)
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);
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// --------------------------
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reg wb_ack_d;
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always @(posedge clk or negedge rstn)
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if(!rstn)
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eth_int_send<=0;
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else
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begin
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wb_ack_d<=wb_ack;
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eth_int_d<=eth_int;
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if(eth_int && !eth_int_d)
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eth_int_send<=1;
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else
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if(eth_int_sent)
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eth_int_send<=0;
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end
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reg fifo_rd;
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reg fifo_rd1;
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wire [123:0] pcx_packet;
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assign pcx_packet=cpu ? pcx1_data_fifo[123:0]:pcx_data_fifo[123:0];
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reg cpu;
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reg cpu2;
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always @(posedge clk or negedge rstn)
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if(rstn==0)
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begin
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if(`TEST_DRAM)
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state<=`TEST_DRAM_1;
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else
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state<=`INIT_DRAM_1; // DRAM initialization is mandatory!
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cpx_ready<=0;
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fifo_rd<=0;
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cpx_packet<=145'b0;
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wb_cycle<=0;
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wb_strobe<=0;
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wb_we<=0;
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wb_sel<=0;
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wb_addr<=64'b0;
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wb_data_o<=64'b0;
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pcx_packet_d<=124'b0;
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fp_pcx<=124'b0;
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fp_req<=0;
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end
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else
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case(state)
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`TEST_DRAM_1:
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begin
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wb_cycle<=1;
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wb_strobe<=1;
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wb_sel<=8'hFF;
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wb_we<=1;
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state<=`TEST_DRAM_2;
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end
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`TEST_DRAM_2:
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if(wb_ack)
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begin
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wb_strobe<=0;
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if(wb_addr<`MEM_SIZE-8)
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begin
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wb_addr[31:0]<=wb_addr[31:0]+8;
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wb_data_o<={wb_addr[31:0]+8,wb_addr[31:0]+8};
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state<=`TEST_DRAM_1;
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end
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else
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begin
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state<=`TEST_DRAM_3;
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wb_cycle<=0;
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wb_sel<=0;
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wb_we<=0;
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wb_data_o<=64'b0;
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wb_addr<=64'b0;
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end
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end
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`TEST_DRAM_3:
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begin
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wb_cycle<=1;
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wb_strobe<=1;
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wb_sel<=8'hFF;
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state<=`TEST_DRAM_4;
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end
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`TEST_DRAM_4:
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if(wb_ack)
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begin
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wb_strobe<=0;
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if(wb_addr<`MEM_SIZE-8)
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begin
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| 285 |
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if(wb_data_i=={wb_addr[31:0],wb_addr[31:0]})
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begin
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wb_addr[31:0]<=wb_addr[31:0]+8;
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state<=`TEST_DRAM_3;
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end
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end
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else
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| 292 |
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begin
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state<=`INIT_DRAM_1;
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wb_cycle<=0;
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wb_sel<=0;
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wb_we<=0;
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wb_data_o<=64'b0;
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wb_addr<=64'b0;
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end
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end
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`INIT_DRAM_1:
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begin
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wb_cycle<=1;
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wb_strobe<=1;
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wb_sel<=8'hFF;
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wb_we<=1;
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cache_init<=1; // We also init cache directories here
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state<=`INIT_DRAM_2;
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end
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`INIT_DRAM_2:
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if(wb_ack)
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begin
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wb_strobe<=0;
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if(wb_addr<`MEM_SIZE-8)
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begin
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| 316 |
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wb_addr[31:0]<=wb_addr[31:0]+8;
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pcx_packet_d[64+11:64+4]<=pcx_packet_d[64+11:64+4]+1; // Address for cachedir init
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state<=`INIT_DRAM_1;
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| 319 |
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end
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| 320 |
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else
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| 321 |
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begin
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| 322 |
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state<=`WAKEUP;
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wb_cycle<=0;
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wb_sel<=0;
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| 325 |
|
|
wb_we<=0;
|
| 326 |
|
|
cache_init<=0;
|
| 327 |
|
|
wb_addr<=64'b0;
|
| 328 |
|
|
end
|
| 329 |
|
|
end
|
| 330 |
|
|
`WAKEUP:
|
| 331 |
|
|
begin
|
| 332 |
|
|
cpx_packet<=145'h1700000000000000000000000000000010001;
|
| 333 |
|
|
cpx_ready<=1;
|
| 334 |
|
|
state<=`PCX_IDLE;
|
| 335 |
|
|
end
|
| 336 |
|
|
`PCX_IDLE:
|
| 337 |
|
|
begin
|
| 338 |
|
|
cnt<=0;
|
| 339 |
|
|
cpx_packet<=145'b0;
|
| 340 |
|
|
cpx_ready<=0;
|
| 341 |
|
|
cpx1_packet<=145'b0;
|
| 342 |
|
|
cpx1_ready<=0;
|
| 343 |
|
|
cpx_two_packet<=0;
|
| 344 |
|
|
multi_hit<=0;
|
| 345 |
|
|
multi_hit1<=0;
|
| 346 |
|
|
if(eth_int_send)
|
| 347 |
|
|
begin
|
| 348 |
|
|
state<=`CPX_SEND_ETH_IRQ;
|
| 349 |
|
|
eth_int_sent<=1;
|
| 350 |
|
|
end
|
| 351 |
|
|
else
|
| 352 |
|
|
if(!pcx_fifo_empty)
|
| 353 |
|
|
begin
|
| 354 |
|
|
pcx_req_d<=pcx_data_fifo[128:124];
|
| 355 |
|
|
pcx_atom_d<=pcx_data_fifo[129];
|
| 356 |
|
|
fifo_rd<=1;
|
| 357 |
|
|
state<=`GOT_PCX_REQ;
|
| 358 |
|
|
cpu<=0;
|
| 359 |
|
|
cpu2<=0;
|
| 360 |
|
|
end
|
| 361 |
|
|
else
|
| 362 |
|
|
if(!pcx1_fifo_empty)
|
| 363 |
|
|
begin
|
| 364 |
|
|
pcx_req_d<=pcx1_data_fifo[128:124];
|
| 365 |
|
|
pcx_atom_d<=pcx1_data_fifo[129];
|
| 366 |
|
|
fifo_rd1<=1;
|
| 367 |
|
|
state<=`GOT_PCX_REQ;
|
| 368 |
|
|
cpu<=1;
|
| 369 |
|
|
cpu2<=1;
|
| 370 |
|
|
end
|
| 371 |
|
|
end
|
| 372 |
|
|
`GOT_PCX_REQ:
|
| 373 |
|
|
begin
|
| 374 |
|
|
pcx_packet_d<=pcx_packet;
|
| 375 |
|
|
if(`DEBUGGING)
|
| 376 |
|
|
begin
|
| 377 |
|
|
wb_sel[1:0]<=pcx_packet[113:112];
|
| 378 |
|
|
wb_sel[2]<=1;
|
| 379 |
|
|
end
|
| 380 |
|
|
if(pcx_packet[103:64]==40'h9800000800 && pcx_packet[122:118]==5'b00001)
|
| 381 |
|
|
begin
|
| 382 |
|
|
state<=`CPX_INT_VEC_DIS;
|
| 383 |
|
|
fifo_rd<=0;
|
| 384 |
|
|
fifo_rd1<=0;
|
| 385 |
|
|
end
|
| 386 |
|
|
else
|
| 387 |
|
|
if(pcx_atom_d==0)
|
| 388 |
|
|
begin
|
| 389 |
|
|
fifo_rd<=0;
|
| 390 |
|
|
fifo_rd1<=0;
|
| 391 |
|
|
if(pcx_packet[122:118]==5'b01010) // FP req
|
| 392 |
|
|
begin
|
| 393 |
|
|
state<=`PCX_FP_1;
|
| 394 |
|
|
pcx_packet_2nd[123]<=0;
|
| 395 |
|
|
end
|
| 396 |
|
|
else
|
| 397 |
|
|
state<=`PCX_REQ_STEP1;
|
| 398 |
|
|
end
|
| 399 |
|
|
else
|
| 400 |
|
|
state<=`PCX_REQ_2ND;
|
| 401 |
|
|
end
|
| 402 |
|
|
`PCX_REQ_2ND:
|
| 403 |
|
|
begin
|
| 404 |
|
|
pcx_packet_2nd<=pcx_packet; //Latch second packet for atomics
|
| 405 |
|
|
if(`DEBUGGING)
|
| 406 |
|
|
if(pcx_fifo_empty)
|
| 407 |
|
|
wb_sel<=8'h67;
|
| 408 |
|
|
fifo_rd<=0;
|
| 409 |
|
|
fifo_rd1<=0;
|
| 410 |
|
|
if(pcx_packet_d[122:118]==5'b01010) // FP req
|
| 411 |
|
|
state<=`PCX_FP_1;
|
| 412 |
|
|
else
|
| 413 |
|
|
state<=`PCX_REQ_STEP1;
|
| 414 |
|
|
end
|
| 415 |
|
|
`PCX_REQ_STEP1:
|
| 416 |
|
|
begin
|
| 417 |
|
|
if(pcx_packet_d[111]==1'b1) // Invalidate request
|
| 418 |
|
|
begin
|
| 419 |
|
|
cpx_packet_1[144]<=1; // Valid
|
| 420 |
|
|
cpx_packet_1[143:140]<=4'b0100; // Invalidate reply is Store ACK
|
| 421 |
|
|
cpx_packet_1[139]<=1; // L2 miss
|
| 422 |
|
|
cpx_packet_1[138:137]<=0; // Error
|
| 423 |
|
|
cpx_packet_1[136]<=pcx_packet_d[117]; // Non-cacheble
|
| 424 |
|
|
cpx_packet_1[135:134]<=pcx_packet_d[113:112]; // Thread ID
|
| 425 |
|
|
cpx_packet_1[133:131]<=0; // Way valid
|
| 426 |
|
|
cpx_packet_1[130]<=((pcx_packet_d[122:118]==5'b10000) && (pcx_req_d==5'b10000)) ? 1:0; // Four byte fill
|
| 427 |
|
|
cpx_packet_1[129]<=pcx_atom_d;
|
| 428 |
|
|
cpx_packet_1[128]<=pcx_packet_d[110]; // Prefetch
|
| 429 |
|
|
cpx_packet_1[127:0]<={2'b0,pcx_packet_d[109]/*BIS*/,pcx_packet_d[122:118]==5'b00000 ? 2'b01:2'b10,pcx_packet_d[64+5:64+4],2'b0,cpu,pcx_packet_d[64+11:64+6],112'b0};
|
| 430 |
|
|
state<=`CPX_READY_1;
|
| 431 |
|
|
end
|
| 432 |
|
|
else
|
| 433 |
|
|
if(pcx_packet_d[122:118]!=5'b01001) // Not INT
|
| 434 |
|
|
begin
|
| 435 |
|
|
wb_cycle<=1'b1;
|
| 436 |
|
|
wb_strobe<=1'b1;
|
| 437 |
|
|
if((pcx_packet_d[122:118]==5'b00000 && !pcx_req_d[4]) || pcx_packet_d[122:118]==5'b00010 || pcx_packet_d[122:118]==5'b00100 || pcx_packet_d[122:118]==5'b00110)
|
| 438 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+4],4'b0000}; //DRAM load/streamload, CAS and SWAP always use DRAM and load first
|
| 439 |
|
|
else
|
| 440 |
|
|
if(pcx_packet_d[122:118]==5'b10000 && !pcx_req_d[4])
|
| 441 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+5],5'b00000}; //DRAM ifill
|
| 442 |
|
|
else
|
| 443 |
|
|
if(pcx_packet_d[64+39:64+28]==12'hFFF && pcx_packet_d[64+27:64+24]!=4'b0) // flash remap FFF1->FFF8
|
| 444 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+3]+37'h0000E00000,3'b000};
|
| 445 |
|
|
else
|
| 446 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+3],3'b000};
|
| 447 |
|
|
wb_data_o<=pcx_packet_d[63:0];
|
| 448 |
|
|
state<=`PCX_REQ_STEP1_1;
|
| 449 |
|
|
end
|
| 450 |
|
|
else
|
| 451 |
|
|
//if((pcx_packet_d[12:10]!=3'b000) && !pcx_packet_d[117]) // Not FLUSH int and not this core
|
| 452 |
|
|
// state<=`PCX_IDLE;
|
| 453 |
|
|
//else
|
| 454 |
|
|
state<=`CPX_READY_1;
|
| 455 |
|
|
case(pcx_packet_d[122:118]) // Packet type
|
| 456 |
|
|
5'b00000://Load
|
| 457 |
|
|
begin
|
| 458 |
|
|
wb_we<=0;
|
| 459 |
|
|
if(!pcx_req_d[4])
|
| 460 |
|
|
wb_sel<=8'b11111111; // DRAM requests are always 128 bit
|
| 461 |
|
|
else
|
| 462 |
|
|
case(pcx_packet_d[106:104]) //Size
|
| 463 |
|
|
3'b000://Byte
|
| 464 |
|
|
case(pcx_packet_d[64+2:64])
|
| 465 |
|
|
3'b000:wb_sel<=8'b10000000;
|
| 466 |
|
|
3'b001:wb_sel<=8'b01000000;
|
| 467 |
|
|
3'b010:wb_sel<=8'b00100000;
|
| 468 |
|
|
3'b011:wb_sel<=8'b00010000;
|
| 469 |
|
|
3'b100:wb_sel<=8'b00001000;
|
| 470 |
|
|
3'b101:wb_sel<=8'b00000100;
|
| 471 |
|
|
3'b110:wb_sel<=8'b00000010;
|
| 472 |
|
|
3'b111:wb_sel<=8'b00000001;
|
| 473 |
|
|
endcase
|
| 474 |
|
|
3'b001://Halfword
|
| 475 |
|
|
case(pcx_packet_d[64+2:64+1])
|
| 476 |
|
|
2'b00:wb_sel<=8'b11000000;
|
| 477 |
|
|
2'b01:wb_sel<=8'b00110000;
|
| 478 |
|
|
2'b10:wb_sel<=8'b00001100;
|
| 479 |
|
|
2'b11:wb_sel<=8'b00000011;
|
| 480 |
|
|
endcase
|
| 481 |
|
|
3'b010://Word
|
| 482 |
|
|
wb_sel<=(pcx_packet_d[64+2]==0) ? 8'b11110000:8'b00001111;
|
| 483 |
|
|
3'b011://Doubleword
|
| 484 |
|
|
wb_sel<=8'b11111111;
|
| 485 |
|
|
3'b100://Quadword
|
| 486 |
|
|
wb_sel<=8'b11111111;
|
| 487 |
|
|
3'b111://Cacheline
|
| 488 |
|
|
wb_sel<=8'b11111111;
|
| 489 |
|
|
default:
|
| 490 |
|
|
wb_sel<=8'b01011010; // Unreal eye-catching value for debug
|
| 491 |
|
|
endcase
|
| 492 |
|
|
end
|
| 493 |
|
|
5'b00001://Store
|
| 494 |
|
|
begin
|
| 495 |
|
|
wb_we<=1;
|
| 496 |
|
|
if(pcx_packet_d[110:109]!=2'b00) //Block (or init) store
|
| 497 |
|
|
wb_sel<=8'b11111111; // Blocks are always 64 bit
|
| 498 |
|
|
else
|
| 499 |
|
|
case(pcx_packet_d[106:104]) //Size
|
| 500 |
|
|
3'b000://Byte
|
| 501 |
|
|
case(pcx_packet_d[64+2:64])
|
| 502 |
|
|
3'b000:wb_sel<=8'b10000000;
|
| 503 |
|
|
3'b001:wb_sel<=8'b01000000;
|
| 504 |
|
|
3'b010:wb_sel<=8'b00100000;
|
| 505 |
|
|
3'b011:wb_sel<=8'b00010000;
|
| 506 |
|
|
3'b100:wb_sel<=8'b00001000;
|
| 507 |
|
|
3'b101:wb_sel<=8'b00000100;
|
| 508 |
|
|
3'b110:wb_sel<=8'b00000010;
|
| 509 |
|
|
3'b111:wb_sel<=8'b00000001;
|
| 510 |
|
|
endcase
|
| 511 |
|
|
3'b001://Halfword
|
| 512 |
|
|
case(pcx_packet_d[64+2:64+1])
|
| 513 |
|
|
2'b00:wb_sel<=8'b11000000;
|
| 514 |
|
|
2'b01:wb_sel<=8'b00110000;
|
| 515 |
|
|
2'b10:wb_sel<=8'b00001100;
|
| 516 |
|
|
2'b11:wb_sel<=8'b00000011;
|
| 517 |
|
|
endcase
|
| 518 |
|
|
3'b010://Word
|
| 519 |
|
|
wb_sel<=(pcx_packet_d[64+2]==0) ? 8'b11110000:8'b00001111;
|
| 520 |
|
|
3'b011://Doubleword
|
| 521 |
|
|
wb_sel<=8'b11111111;
|
| 522 |
|
|
default:
|
| 523 |
|
|
if(`DEBUGGING)
|
| 524 |
|
|
wb_sel<=8'b01011010; // Unreal eye-catching value for debug
|
| 525 |
|
|
endcase
|
| 526 |
|
|
end
|
| 527 |
|
|
5'b00010://CAS
|
| 528 |
|
|
begin
|
| 529 |
|
|
wb_we<=0; //Load first
|
| 530 |
|
|
wb_sel<=8'b11111111; // CAS loads are as cacheline
|
| 531 |
|
|
end
|
| 532 |
|
|
5'b00100://STRLOAD
|
| 533 |
|
|
begin
|
| 534 |
|
|
wb_we<=0;
|
| 535 |
|
|
wb_sel<=8'b11111111; // Stream loads are always 128 bit
|
| 536 |
|
|
end
|
| 537 |
|
|
5'b00101://STRSTORE
|
| 538 |
|
|
begin
|
| 539 |
|
|
wb_we<=1;
|
| 540 |
|
|
case(pcx_packet_d[106:104]) //Size
|
| 541 |
|
|
3'b000://Byte
|
| 542 |
|
|
case(pcx_packet_d[64+2:64])
|
| 543 |
|
|
3'b000:wb_sel<=8'b10000000;
|
| 544 |
|
|
3'b001:wb_sel<=8'b01000000;
|
| 545 |
|
|
3'b010:wb_sel<=8'b00100000;
|
| 546 |
|
|
3'b011:wb_sel<=8'b00010000;
|
| 547 |
|
|
3'b100:wb_sel<=8'b00001000;
|
| 548 |
|
|
3'b101:wb_sel<=8'b00000100;
|
| 549 |
|
|
3'b110:wb_sel<=8'b00000010;
|
| 550 |
|
|
3'b111:wb_sel<=8'b00000001;
|
| 551 |
|
|
endcase
|
| 552 |
|
|
3'b001://Halfword
|
| 553 |
|
|
case(pcx_packet_d[64+2:64+1])
|
| 554 |
|
|
2'b00:wb_sel<=8'b11000000;
|
| 555 |
|
|
2'b01:wb_sel<=8'b00110000;
|
| 556 |
|
|
2'b10:wb_sel<=8'b00001100;
|
| 557 |
|
|
2'b11:wb_sel<=8'b00000011;
|
| 558 |
|
|
endcase
|
| 559 |
|
|
3'b010://Word
|
| 560 |
|
|
wb_sel<=(pcx_packet_d[64+2]==0) ? 8'b11110000:8'b00001111;
|
| 561 |
|
|
3'b011://Doubleword
|
| 562 |
|
|
wb_sel<=8'b11111111;
|
| 563 |
|
|
3'b100://Quadword
|
| 564 |
|
|
wb_sel<=8'b11111111;
|
| 565 |
|
|
3'b111://Cacheline
|
| 566 |
|
|
wb_sel<=8'b11111111;
|
| 567 |
|
|
default:
|
| 568 |
|
|
wb_sel<=8'b01011010; // Unreal eye-catching value for debug
|
| 569 |
|
|
endcase
|
| 570 |
|
|
end
|
| 571 |
|
|
5'b00110://SWAP/LDSTUB
|
| 572 |
|
|
begin
|
| 573 |
|
|
wb_we<=0; // Load first, as CAS
|
| 574 |
|
|
wb_sel<=8'b11111111; // SWAP/LDSTUB loads are as cacheline
|
| 575 |
|
|
end
|
| 576 |
|
|
5'b01001://INT
|
| 577 |
|
|
if(pcx_packet_d[117]) // Flush
|
| 578 |
|
|
begin
|
| 579 |
|
|
cpx_packet_1<={9'h171,pcx_packet_d[113:112],11'h0,pcx_packet_d[64+5:64+4],2'b0,cpu,pcx_packet_d[64+11:64+6],30'h0,pcx_packet_d[17:0],46'b0,pcx_packet_d[17:0]}; //FLUSH instruction answer
|
| 580 |
|
|
cpx_packet_2<={9'h171,pcx_packet_d[113:112],11'h0,pcx_packet_d[64+5:64+4],2'b0,cpu,pcx_packet_d[64+11:64+6],30'h0,pcx_packet_d[17:0],46'b0,pcx_packet_d[17:0]}; //FLUSH instruction answer
|
| 581 |
|
|
cpx_two_packet<=1;
|
| 582 |
|
|
cpu2<=!cpu; // Flush should be sent to both cores
|
| 583 |
|
|
end
|
| 584 |
|
|
else // Tread-to-thread interrupt
|
| 585 |
|
|
begin
|
| 586 |
|
|
cpx_packet_1<={9'h170,pcx_packet_d[113:112],52'h0,pcx_packet_d[17:0],46'h0,pcx_packet_d[17:0]};
|
| 587 |
|
|
cpu<=pcx_packet_d[10];
|
| 588 |
|
|
end
|
| 589 |
|
|
//5'b01010: FP1 - processed by separate state
|
| 590 |
|
|
//5'b01011: FP2 - processed by separate state
|
| 591 |
|
|
//5'b01101: FWDREQ - not implemented
|
| 592 |
|
|
//5'b01110: FWDREPL - not implemented
|
| 593 |
|
|
5'b10000://IFILL
|
| 594 |
|
|
begin
|
| 595 |
|
|
wb_we<=0;
|
| 596 |
|
|
if(pcx_req_d[4]) // I/O access
|
| 597 |
|
|
wb_sel<=(pcx_packet_d[64+2]==0) ? 8'b11110000:8'b00001111;
|
| 598 |
|
|
else
|
| 599 |
|
|
wb_sel<=8'b11111111;
|
| 600 |
|
|
end
|
| 601 |
|
|
default:
|
| 602 |
|
|
begin
|
| 603 |
|
|
wb_we<=0;
|
| 604 |
|
|
wb_sel<=8'b10101010; // Unreal eye-catching value for debug
|
| 605 |
|
|
end
|
| 606 |
|
|
endcase
|
| 607 |
|
|
end
|
| 608 |
|
|
`PCX_REQ_STEP1_1:
|
| 609 |
|
|
state<=`PCX_REQ_STEP1_2; // Delay for L1 directory
|
| 610 |
|
|
`PCX_REQ_STEP1_2:
|
| 611 |
|
|
begin
|
| 612 |
|
|
if(wb_ack || wb_ack_d)
|
| 613 |
|
|
begin
|
| 614 |
|
|
cpx_packet_1[144]<=1; // Valid
|
| 615 |
|
|
cpx_packet_1[139]<=(pcx_packet_d[122:118]==5'b00000) || (pcx_packet_d[122:118]==5'b10000) ? 1:0; // L2 always miss on load and ifill
|
| 616 |
|
|
cpx_packet_1[138:137]<=0; // Error
|
| 617 |
|
|
cpx_packet_1[136]<=pcx_packet_d[117] || (pcx_packet_d[122:118]==5'b00001) ? 1:0; // Non-cacheble is set on store too
|
| 618 |
|
|
cpx_packet_1[135:134]<=pcx_packet_d[113:112]; // Thread ID
|
| 619 |
|
|
if((pcx_packet_d[122:118]==5'b00000 && !pcx_packet_d[117] && !pcx_packet_d[110]) || (pcx_packet_d[122:118]==5'b10000)) // Cacheble Load or IFill
|
| 620 |
|
|
cpx_packet_1[133:131]<={othercachehit[0],wayval0};
|
| 621 |
|
|
else
|
| 622 |
|
|
cpx_packet_1[133:131]<=3'b000; // Way valid
|
| 623 |
|
|
if(pcx_packet_d[122:118]==5'b00100) // Strload
|
| 624 |
|
|
cpx_packet_1[130]<=pcx_packet_d[106]; // A
|
| 625 |
|
|
else
|
| 626 |
|
|
if(pcx_packet_d[122:118]==5'b00101) // Stream store
|
| 627 |
|
|
cpx_packet_1[130]<=pcx_packet_d[108]; // A
|
| 628 |
|
|
else
|
| 629 |
|
|
cpx_packet_1[130]<=((pcx_packet_d[122:118]==5'b10000) && pcx_req_d[4]) ? 1:0; // Four byte fill
|
| 630 |
|
|
if(pcx_packet_d[122:118]==5'b00100) // Strload
|
| 631 |
|
|
cpx_packet_1[129]<=pcx_packet_d[105]; // B
|
| 632 |
|
|
else
|
| 633 |
|
|
cpx_packet_1[129]<=pcx_atom_d || (pcx_packet_d[122:118]==5'b00110); // SWAP is single-packet but needs atom in CPX
|
| 634 |
|
|
cpx_packet_1[128]<=pcx_packet_d[110] && pcx_packet_d[122:118]==5'b00000; // Prefetch
|
| 635 |
|
|
cpx_packet_2[144]<=1; // Valid
|
| 636 |
|
|
cpx_packet_2[139]<=0; // L2 miss
|
| 637 |
|
|
cpx_packet_2[138:137]<=0; // Error
|
| 638 |
|
|
cpx_packet_2[136]<=pcx_packet_d[117] || (pcx_packet_d[122:118]==5'b00001) ? 1:0; // Non-cacheble is set on store too
|
| 639 |
|
|
cpx_packet_2[135:134]<=pcx_packet_d[113:112]; // Thread ID
|
| 640 |
|
|
if(pcx_packet_d[122:118]==5'b10000) // IFill
|
| 641 |
|
|
cpx_packet_2[133:131]<={othercachehit[1],wayval1};
|
| 642 |
|
|
else
|
| 643 |
|
|
cpx_packet_2[133:131]<=3'b000; // Way valid
|
| 644 |
|
|
cpx_packet_2[130]<=0; // Four byte fill
|
| 645 |
|
|
cpx_packet_2[129]<=pcx_atom_d || (pcx_packet_d[122:118]==5'b00110) || ((pcx_packet_d[122:118]==5'b10000) && !pcx_req_d[4]);
|
| 646 |
|
|
cpx_packet_2[128]<=0; // Prefetch
|
| 647 |
|
|
wb_strobe<=0;
|
| 648 |
|
|
wb_sel<=8'b0;
|
| 649 |
|
|
wb_addr<=64'b0;
|
| 650 |
|
|
wb_data_o<=64'b0;
|
| 651 |
|
|
wb_we<=0;
|
| 652 |
|
|
case(pcx_packet_d[122:118]) // Packet type
|
| 653 |
|
|
5'b00000://Load
|
| 654 |
|
|
begin
|
| 655 |
|
|
cpx_packet_1[143:140]<=4'b0000; // Type
|
| 656 |
|
|
if(!pcx_req_d[4])
|
| 657 |
|
|
begin
|
| 658 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 659 |
|
|
state<=`PCX_REQ_STEP2;
|
| 660 |
|
|
end
|
| 661 |
|
|
else
|
| 662 |
|
|
case(pcx_packet_d[106:104]) //Size
|
| 663 |
|
|
3'b000://Byte
|
| 664 |
|
|
begin
|
| 665 |
|
|
case(pcx_packet_d[64+2:64])
|
| 666 |
|
|
3'b000:cpx_packet_1[127:0]<={wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56],wb_data_i[63:56]};
|
| 667 |
|
|
3'b001:cpx_packet_1[127:0]<={wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48],wb_data_i[55:48]};
|
| 668 |
|
|
3'b010:cpx_packet_1[127:0]<={wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40],wb_data_i[47:40]};
|
| 669 |
|
|
3'b011:cpx_packet_1[127:0]<={wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32],wb_data_i[39:32]};
|
| 670 |
|
|
3'b100:cpx_packet_1[127:0]<={wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24],wb_data_i[31:24]};
|
| 671 |
|
|
3'b101:cpx_packet_1[127:0]<={wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16],wb_data_i[23:16]};
|
| 672 |
|
|
3'b110:cpx_packet_1[127:0]<={wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8],wb_data_i[15: 8]};
|
| 673 |
|
|
3'b111:cpx_packet_1[127:0]<={wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0],wb_data_i[ 7: 0]};
|
| 674 |
|
|
endcase
|
| 675 |
|
|
wb_cycle<=0;
|
| 676 |
|
|
state<=`CPX_READY_1;
|
| 677 |
|
|
end
|
| 678 |
|
|
3'b001://Halfword
|
| 679 |
|
|
begin
|
| 680 |
|
|
case(pcx_packet_d[64+2:64+1])
|
| 681 |
|
|
2'b00:cpx_packet_1[127:0]<={wb_data_i[63:48],wb_data_i[63:48],wb_data_i[63:48],wb_data_i[63:48],wb_data_i[63:48],wb_data_i[63:48],wb_data_i[63:48],wb_data_i[63:48]};
|
| 682 |
|
|
2'b01:cpx_packet_1[127:0]<={wb_data_i[47:32],wb_data_i[47:32],wb_data_i[47:32],wb_data_i[47:32],wb_data_i[47:32],wb_data_i[47:32],wb_data_i[47:32],wb_data_i[47:32]};
|
| 683 |
|
|
2'b10:cpx_packet_1[127:0]<={wb_data_i[31:16],wb_data_i[31:16],wb_data_i[31:16],wb_data_i[31:16],wb_data_i[31:16],wb_data_i[31:16],wb_data_i[31:16],wb_data_i[31:16]};
|
| 684 |
|
|
2'b11:cpx_packet_1[127:0]<={wb_data_i[15: 0],wb_data_i[15: 0],wb_data_i[15: 0],wb_data_i[15: 0],wb_data_i[15: 0],wb_data_i[15: 0],wb_data_i[15: 0],wb_data_i[15: 0]};
|
| 685 |
|
|
endcase
|
| 686 |
|
|
wb_cycle<=0;
|
| 687 |
|
|
state<=`CPX_READY_1;
|
| 688 |
|
|
end
|
| 689 |
|
|
3'b010://Word
|
| 690 |
|
|
begin
|
| 691 |
|
|
if(pcx_packet_d[64+2]==0)
|
| 692 |
|
|
cpx_packet_1[127:0]<={wb_data_i[63:32],wb_data_i[63:32],wb_data_i[63:32],wb_data_i[63:32]};
|
| 693 |
|
|
else
|
| 694 |
|
|
cpx_packet_1[127:0]<={wb_data_i[31:0],wb_data_i[31:0],wb_data_i[31:0],wb_data_i[31:0]};
|
| 695 |
|
|
wb_cycle<=0;
|
| 696 |
|
|
state<=`CPX_READY_1;
|
| 697 |
|
|
end
|
| 698 |
|
|
3'b011://Doubleword
|
| 699 |
|
|
begin
|
| 700 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 701 |
|
|
wb_cycle<=0;
|
| 702 |
|
|
state<=`CPX_READY_1;
|
| 703 |
|
|
end
|
| 704 |
|
|
3'b100://Quadword
|
| 705 |
|
|
begin
|
| 706 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 707 |
|
|
wb_cycle<=0;
|
| 708 |
|
|
state<=`CPX_READY_1; // 16 byte access to PROM should just duplicate the data
|
| 709 |
|
|
end
|
| 710 |
|
|
3'b111://Cacheline
|
| 711 |
|
|
begin
|
| 712 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 713 |
|
|
wb_cycle<=0;
|
| 714 |
|
|
state<=`CPX_READY_1; // 16 byte access to PROM should just duplicate the data
|
| 715 |
|
|
end
|
| 716 |
|
|
default:
|
| 717 |
|
|
begin
|
| 718 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 719 |
|
|
wb_cycle<=0;
|
| 720 |
|
|
state<=`PCX_UNKNOWN;
|
| 721 |
|
|
end
|
| 722 |
|
|
endcase
|
| 723 |
|
|
end
|
| 724 |
|
|
5'b00001://Store
|
| 725 |
|
|
begin
|
| 726 |
|
|
cpx_packet_1[143:140]<=4'b0100; // Type
|
| 727 |
|
|
cpx_packet_1[127:0]<={2'b0,pcx_packet_d[109]/*BIS*/,2'b0,pcx_packet_d[64+5:64+4],2'b0,cpu,pcx_packet_d[64+11:64+6],inval_vect0};
|
| 728 |
|
|
// if((pcx_packet_d[110:109]==2'b01) && (pcx_packet_d[64+5:64]==0) && !inval_vect0[3] && !inval_vect1[3]) // Block init store
|
| 729 |
|
|
// state<=`PCX_BIS;
|
| 730 |
|
|
// else
|
| 731 |
|
|
// begin
|
| 732 |
|
|
wb_cycle<=0;
|
| 733 |
|
|
state<=`CPX_READY_1;
|
| 734 |
|
|
// end
|
| 735 |
|
|
end
|
| 736 |
|
|
5'b00010://CAS
|
| 737 |
|
|
begin
|
| 738 |
|
|
cpx_packet_1[143:140]<=4'b0000; // Load return for first packet
|
| 739 |
|
|
cpx_packet_2[143:140]<=4'b0100; // Store ACK for second packet
|
| 740 |
|
|
cpx_packet_2[127:0]<={5'b0,pcx_packet_d[64+5:64+4],2'b0,cpu,pcx_packet_d[64+11:64+6],inval_vect0};
|
| 741 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 742 |
|
|
state<=`PCX_REQ_STEP2;
|
| 743 |
|
|
end
|
| 744 |
|
|
5'b00100://STRLOAD
|
| 745 |
|
|
begin
|
| 746 |
|
|
cpx_packet_1[143:140]<=4'b0010; // Type
|
| 747 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 748 |
|
|
state<=`PCX_REQ_STEP2;
|
| 749 |
|
|
end
|
| 750 |
|
|
5'b00101://STRSTORE
|
| 751 |
|
|
begin
|
| 752 |
|
|
cpx_packet_1[143:140]<=4'b0110; // Type
|
| 753 |
|
|
cpx_packet_1[127:0]<={5'b0,pcx_packet_d[64+5:64+4],3'b0,pcx_packet_d[64+11:64+6],inval_vect0};
|
| 754 |
|
|
wb_cycle<=0;
|
| 755 |
|
|
state<=`CPX_READY_1;
|
| 756 |
|
|
end
|
| 757 |
|
|
5'b00110://SWAP/LDSTUB
|
| 758 |
|
|
begin
|
| 759 |
|
|
cpx_packet_1[143:140]<=4'b0000; // Load return for first packet
|
| 760 |
|
|
cpx_packet_2[143:140]<=4'b0100; // Store ACK for second packet
|
| 761 |
|
|
cpx_packet_2[127:0]<={5'b0,pcx_packet_d[64+5:64+4],3'b0,pcx_packet_d[64+11:64+6],inval_vect0};
|
| 762 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 763 |
|
|
state<=`PCX_REQ_STEP2;
|
| 764 |
|
|
end
|
| 765 |
|
|
5'b10000://IFILL
|
| 766 |
|
|
begin
|
| 767 |
|
|
cpx_packet_1[143:140]<=4'b0001; // Type
|
| 768 |
|
|
cpx_packet_2[143:140]<=4'b0001; // Type
|
| 769 |
|
|
if(pcx_req_d[4]) // I/O access
|
| 770 |
|
|
begin
|
| 771 |
|
|
if(pcx_packet_d[64+2]==0)
|
| 772 |
|
|
cpx_packet_1[127:0]<={wb_data_i[63:32],wb_data_i[63:32],wb_data_i[63:32],wb_data_i[63:32]};
|
| 773 |
|
|
else
|
| 774 |
|
|
cpx_packet_1[127:0]<={wb_data_i[31:0],wb_data_i[31:0],wb_data_i[31:0],wb_data_i[31:0]};
|
| 775 |
|
|
state<=`CPX_READY_1;
|
| 776 |
|
|
wb_cycle<=0;
|
| 777 |
|
|
end
|
| 778 |
|
|
else
|
| 779 |
|
|
begin
|
| 780 |
|
|
cpx_packet_1[127:0]<={wb_data_i,wb_data_i};
|
| 781 |
|
|
state<=`PCX_REQ_STEP2;
|
| 782 |
|
|
end
|
| 783 |
|
|
end
|
| 784 |
|
|
default:
|
| 785 |
|
|
begin
|
| 786 |
|
|
wb_cycle<=0;
|
| 787 |
|
|
state<=`PCX_UNKNOWN;
|
| 788 |
|
|
end
|
| 789 |
|
|
endcase
|
| 790 |
|
|
end
|
| 791 |
|
|
end
|
| 792 |
|
|
`PCX_REQ_STEP2: // IFill, Load/strload, CAS, SWAP, LDSTUB - alwas load
|
| 793 |
|
|
begin
|
| 794 |
|
|
wb_strobe<=1'b1;
|
| 795 |
|
|
if(pcx_packet_d[122:118]==5'b10000)
|
| 796 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+5],5'b01000};
|
| 797 |
|
|
else
|
| 798 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+4],4'b1000};
|
| 799 |
|
|
wb_sel<=8'b11111111; // It is always full width for subsequent IFill and load accesses
|
| 800 |
|
|
state<=`PCX_REQ_STEP2_1;
|
| 801 |
|
|
end
|
| 802 |
|
|
`PCX_REQ_STEP2_1:
|
| 803 |
|
|
if(wb_ack==1)
|
| 804 |
|
|
begin
|
| 805 |
|
|
wb_strobe<=0;
|
| 806 |
|
|
wb_sel<=8'b0;
|
| 807 |
|
|
wb_addr<=64'b0;
|
| 808 |
|
|
wb_data_o<=64'b0;
|
| 809 |
|
|
wb_we<=0;
|
| 810 |
|
|
cpx_packet_1[63:0]<=wb_data_i;
|
| 811 |
|
|
if((pcx_packet_d[122:118]!=5'b00000) && (pcx_packet_d[122:118]!=5'b00100))
|
| 812 |
|
|
if(pcx_packet_d[122:118]!=5'b00010) // IFill, SWAP
|
| 813 |
|
|
state<=`PCX_REQ_STEP3;
|
| 814 |
|
|
else
|
| 815 |
|
|
state<=`PCX_REQ_CAS_COMPARE; // CAS
|
| 816 |
|
|
else
|
| 817 |
|
|
begin
|
| 818 |
|
|
wb_cycle<=0;
|
| 819 |
|
|
state<=`CPX_READY_1;
|
| 820 |
|
|
end
|
| 821 |
|
|
end
|
| 822 |
|
|
`PCX_REQ_CAS_COMPARE:
|
| 823 |
|
|
begin
|
| 824 |
|
|
cpx_two_packet<=1;
|
| 825 |
|
|
if(pcx_packet_d[106:104]==3'b010) // 32-bit
|
| 826 |
|
|
case(pcx_packet_d[64+3:64+2])
|
| 827 |
|
|
2'b00:state<=cpx_packet_1[127:96]==pcx_packet_d[63:32] ? `PCX_REQ_STEP3:`CPX_READY_1;
|
| 828 |
|
|
2'b01:state<=cpx_packet_1[95:64]==pcx_packet_d[63:32] ? `PCX_REQ_STEP3:`CPX_READY_1;
|
| 829 |
|
|
2'b10:state<=cpx_packet_1[63:32]==pcx_packet_d[63:32] ? `PCX_REQ_STEP3:`CPX_READY_1;
|
| 830 |
|
|
2'b11:state<=cpx_packet_1[31:0]==pcx_packet_d[63:32] ? `PCX_REQ_STEP3:`CPX_READY_1;
|
| 831 |
|
|
endcase
|
| 832 |
|
|
else
|
| 833 |
|
|
if(pcx_packet_d[64+3]==0)
|
| 834 |
|
|
state<=cpx_packet_1[127:64]==pcx_packet_d[63:0] ? `PCX_REQ_STEP3:`CPX_READY_1;
|
| 835 |
|
|
else
|
| 836 |
|
|
state<=cpx_packet_1[63:0]==pcx_packet_d[63:0] ? `PCX_REQ_STEP3:`CPX_READY_1;
|
| 837 |
|
|
end
|
| 838 |
|
|
`PCX_REQ_STEP3: // 256-bit IFILL; CAS, SWAP and LDSTUB store
|
| 839 |
|
|
begin
|
| 840 |
|
|
if(pcx_packet_d[122:118]==5'b10000)
|
| 841 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+5],5'b10000};
|
| 842 |
|
|
else
|
| 843 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+3],3'b000}; // CAS or SWAP save
|
| 844 |
|
|
cpx_two_packet<=1;
|
| 845 |
|
|
if(pcx_packet_d[122:118]==5'b10000)
|
| 846 |
|
|
wb_we<=0;
|
| 847 |
|
|
else
|
| 848 |
|
|
wb_we<=1;
|
| 849 |
|
|
wb_strobe<=1'b1;
|
| 850 |
|
|
if(pcx_packet_d[122:118]==5'b00010) // CAS
|
| 851 |
|
|
if(pcx_packet_d[106:104]==3'b010)
|
| 852 |
|
|
wb_sel<=(pcx_packet_d[64+2]==0) ? 8'b11110000:8'b00001111;
|
| 853 |
|
|
else
|
| 854 |
|
|
wb_sel<=8'b11111111; //CASX
|
| 855 |
|
|
else
|
| 856 |
|
|
if(pcx_packet_d[122:118]==5'b00110) //SWAP or LDSTUB
|
| 857 |
|
|
if(pcx_packet_d[106:104]==3'b000) //LDSTUB
|
| 858 |
|
|
case(pcx_packet_d[64+2:64])
|
| 859 |
|
|
3'b000:wb_sel<=8'b10000000;
|
| 860 |
|
|
3'b001:wb_sel<=8'b01000000;
|
| 861 |
|
|
3'b010:wb_sel<=8'b00100000;
|
| 862 |
|
|
3'b011:wb_sel<=8'b00010000;
|
| 863 |
|
|
3'b100:wb_sel<=8'b00001000;
|
| 864 |
|
|
3'b101:wb_sel<=8'b00000100;
|
| 865 |
|
|
3'b110:wb_sel<=8'b00000010;
|
| 866 |
|
|
3'b111:wb_sel<=8'b00000001;
|
| 867 |
|
|
endcase
|
| 868 |
|
|
else
|
| 869 |
|
|
wb_sel<=(pcx_packet_d[64+2]==0) ? 8'b11110000:8'b00001111; ///SWAP is always 32-bit
|
| 870 |
|
|
else
|
| 871 |
|
|
wb_sel<=8'b11111111; // It is always full width for subsequent IFill accesses
|
| 872 |
|
|
if(pcx_packet_d[122:118]==5'b00110) //SWAP or LDSTUB
|
| 873 |
|
|
wb_data_o<={pcx_packet_d[63:32],pcx_packet_d[63:32]};
|
| 874 |
|
|
// wb_data_o<=pcx_packet_d[63:0];
|
| 875 |
|
|
else
|
| 876 |
|
|
wb_data_o<=pcx_packet_2nd[63:0]; // CAS store second packet data
|
| 877 |
|
|
// if(pcx_packet_d[106:104]==3'b010)
|
| 878 |
|
|
// wb_data_o<={pcx_packet_2nd[63:32],pcx_packet_2nd[63:32]}; // CAS store second packet data
|
| 879 |
|
|
// else
|
| 880 |
|
|
// wb_data_o<=pcx_packet_2nd[63:0];
|
| 881 |
|
|
state<=`PCX_REQ_STEP3_1;
|
| 882 |
|
|
end
|
| 883 |
|
|
`PCX_REQ_STEP3_1:
|
| 884 |
|
|
if(wb_ack==1)
|
| 885 |
|
|
begin
|
| 886 |
|
|
wb_strobe<=0;
|
| 887 |
|
|
wb_sel<=8'b0;
|
| 888 |
|
|
wb_addr<=64'b0;
|
| 889 |
|
|
wb_we<=0;
|
| 890 |
|
|
wb_data_o<=64'b0;
|
| 891 |
|
|
if(pcx_packet_d[122:118]==5'b10000) // IFill
|
| 892 |
|
|
begin
|
| 893 |
|
|
cpx_packet_2[127:64]<=wb_data_i;
|
| 894 |
|
|
state<=`PCX_REQ_STEP4;
|
| 895 |
|
|
end
|
| 896 |
|
|
else
|
| 897 |
|
|
begin
|
| 898 |
|
|
wb_cycle<=0;
|
| 899 |
|
|
state<=`CPX_READY_1;
|
| 900 |
|
|
end
|
| 901 |
|
|
end
|
| 902 |
|
|
`PCX_REQ_STEP4: // 256-bit IFILL only
|
| 903 |
|
|
begin
|
| 904 |
|
|
wb_strobe<=1'b1;
|
| 905 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+5],5'b11000};
|
| 906 |
|
|
wb_sel<=8'b11111111; // It is always full width for subsequent accesses
|
| 907 |
|
|
state<=`PCX_REQ_STEP4_1;
|
| 908 |
|
|
end
|
| 909 |
|
|
`PCX_REQ_STEP4_1:
|
| 910 |
|
|
if(wb_ack==1)
|
| 911 |
|
|
begin
|
| 912 |
|
|
wb_cycle<=0;
|
| 913 |
|
|
wb_strobe<=0;
|
| 914 |
|
|
wb_sel<=8'b0;
|
| 915 |
|
|
wb_addr<=64'b0;
|
| 916 |
|
|
wb_we<=0;
|
| 917 |
|
|
cpx_packet_2[63:0]<=wb_data_i;
|
| 918 |
|
|
state<=`CPX_READY_1;
|
| 919 |
|
|
end
|
| 920 |
|
|
`PCX_BIS: // Block init store
|
| 921 |
|
|
begin
|
| 922 |
|
|
wb_strobe<=1'b1;
|
| 923 |
|
|
wb_we<=1;
|
| 924 |
|
|
wb_addr<={pcx_req_d,19'b0,pcx_packet_d[103:64+6],6'b001000};
|
| 925 |
|
|
wb_sel<=8'b11111111;
|
| 926 |
|
|
wb_data_o<=64'b0;
|
| 927 |
|
|
state<=`PCX_BIS_1;
|
| 928 |
|
|
end
|
| 929 |
|
|
`PCX_BIS_1:
|
| 930 |
|
|
if(wb_ack)
|
| 931 |
|
|
begin
|
| 932 |
|
|
wb_strobe<=0;
|
| 933 |
|
|
if(wb_addr[39:0]<(pcx_packet_d[64+39:64]+8*7))
|
| 934 |
|
|
state<=`PCX_BIS_2;
|
| 935 |
|
|
else
|
| 936 |
|
|
begin
|
| 937 |
|
|
wb_cycle<=0;
|
| 938 |
|
|
wb_sel<=0;
|
| 939 |
|
|
wb_we<=0;
|
| 940 |
|
|
wb_addr<=64'b0;
|
| 941 |
|
|
state<=`CPX_READY_1;
|
| 942 |
|
|
end
|
| 943 |
|
|
end
|
| 944 |
|
|
`PCX_BIS_2:
|
| 945 |
|
|
begin
|
| 946 |
|
|
wb_strobe<=1'b1;
|
| 947 |
|
|
wb_addr[5:0]<=wb_addr[5:0]+8;
|
| 948 |
|
|
state<=`PCX_BIS_1;
|
| 949 |
|
|
end
|
| 950 |
|
|
`PCX_FP_1:
|
| 951 |
|
|
begin
|
| 952 |
|
|
fp_pcx<=pcx_packet_d;
|
| 953 |
|
|
fp_req<=1;
|
| 954 |
|
|
state<=`PCX_FP_2;
|
| 955 |
|
|
if(`DEBUGGING)
|
| 956 |
|
|
begin
|
| 957 |
|
|
wb_addr<=pcx_packet_d[103:64];
|
| 958 |
|
|
wb_data_o<=pcx_packet_d[63:0];
|
| 959 |
|
|
wb_sel<=8'h22;
|
| 960 |
|
|
end
|
| 961 |
|
|
end
|
| 962 |
|
|
`PCX_FP_2:
|
| 963 |
|
|
begin
|
| 964 |
|
|
fp_pcx<=pcx_packet_2nd;
|
| 965 |
|
|
state<=`FP_WAIT;
|
| 966 |
|
|
if(`DEBUGGING)
|
| 967 |
|
|
begin
|
| 968 |
|
|
wb_addr<=pcx_packet_2nd[103:64];
|
| 969 |
|
|
wb_data_o<=pcx_packet_d[63:0];
|
| 970 |
|
|
wb_sel<=8'h23;
|
| 971 |
|
|
end
|
| 972 |
|
|
end
|
| 973 |
|
|
`FP_WAIT:
|
| 974 |
|
|
begin
|
| 975 |
|
|
fp_pcx<=124'b0;
|
| 976 |
|
|
fp_req<=0;
|
| 977 |
|
|
if(fp_rdy)
|
| 978 |
|
|
state<=`CPX_FP;
|
| 979 |
|
|
if(`DEBUGGING)
|
| 980 |
|
|
wb_sel<=8'h24;
|
| 981 |
|
|
end
|
| 982 |
|
|
`CPX_FP:
|
| 983 |
|
|
if(fp_cpx[144]) // Packet valid
|
| 984 |
|
|
begin
|
| 985 |
|
|
cpx_packet_1<=fp_cpx;
|
| 986 |
|
|
state<=`CPX_READY_1;
|
| 987 |
|
|
if(`DEBUGGING)
|
| 988 |
|
|
begin
|
| 989 |
|
|
wb_addr<=fp_cpx[63:0];
|
| 990 |
|
|
wb_data_o<=fp_cpx[127:64];
|
| 991 |
|
|
end
|
| 992 |
|
|
end
|
| 993 |
|
|
else
|
| 994 |
|
|
if(!fp_rdy)
|
| 995 |
|
|
state<=`FP_WAIT; // Else wait for another one if it is not here still
|
| 996 |
|
|
`CPX_SEND_ETH_IRQ:
|
| 997 |
|
|
begin
|
| 998 |
|
|
cpx_packet_1<=145'h1_7_000_000000000000001D_000000000000_001D;
|
| 999 |
|
|
eth_int_sent<=0;
|
| 1000 |
|
|
state<=`CPX_READY_1;
|
| 1001 |
|
|
end
|
| 1002 |
|
|
`CPX_INT_VEC_DIS:
|
| 1003 |
|
|
begin
|
| 1004 |
|
|
//if(pcx_packet_d[12:10]==3'b000) // Send interrupt only if it is for this core
|
| 1005 |
|
|
cpx_two_packet<=1;
|
| 1006 |
|
|
cpu2<=pcx_packet_d[10];
|
| 1007 |
|
|
cpx_packet_1[144:140]<=5'b10100;
|
| 1008 |
|
|
cpx_packet_1[139:137]<=0;
|
| 1009 |
|
|
cpx_packet_1[136]<=1;
|
| 1010 |
|
|
cpx_packet_1[135:134]<=pcx_packet_d[113:112]; // Thread ID
|
| 1011 |
|
|
cpx_packet_1[133:130]<=0;
|
| 1012 |
|
|
cpx_packet_1[129]<=pcx_atom_d;
|
| 1013 |
|
|
cpx_packet_1[128]<=0;
|
| 1014 |
|
|
cpx_packet_1[127:0]<={5'b0,pcx_packet_d[64+5:64+4],2'b0,cpu,pcx_packet_d[64+11:64+6],112'b0};
|
| 1015 |
|
|
cpx_packet_2<={9'h170,54'h0,pcx_packet_d[17:0],46'h0,pcx_packet_d[17:0]};
|
| 1016 |
|
|
state<=`CPX_READY_1;
|
| 1017 |
|
|
end
|
| 1018 |
|
|
`CPX_READY_1:
|
| 1019 |
|
|
begin
|
| 1020 |
|
|
if(!cpu)
|
| 1021 |
|
|
begin
|
| 1022 |
|
|
cpx_ready<=1;
|
| 1023 |
|
|
cpx_packet<=cpx_packet_1;
|
| 1024 |
|
|
if(othercpuhit[0])
|
| 1025 |
|
|
begin
|
| 1026 |
|
|
cpx1_ready<=1;
|
| 1027 |
|
|
cpx1_packet<={1'b1,4'b0011,12'b0,5'b0,pcx_packet_d[64+5:64+4],3'b001,pcx_packet_d[64+11:64+6],inval_vect0};
|
| 1028 |
|
|
end
|
| 1029 |
|
|
end
|
| 1030 |
|
|
else
|
| 1031 |
|
|
begin
|
| 1032 |
|
|
cpx1_ready<=1;
|
| 1033 |
|
|
cpx1_packet<=cpx_packet_1;
|
| 1034 |
|
|
if(othercpuhit[0])
|
| 1035 |
|
|
begin
|
| 1036 |
|
|
cpx_ready<=1;
|
| 1037 |
|
|
cpx_packet<={1'b1,4'b0011,12'b0,5'b0,pcx_packet_d[64+5:64+4],3'b000,pcx_packet_d[64+11:64+6],inval_vect0};;
|
| 1038 |
|
|
end
|
| 1039 |
|
|
end
|
| 1040 |
|
|
cnt<=cnt+1;
|
| 1041 |
|
|
if(`DEBUGGING)
|
| 1042 |
|
|
if(multi_hit || multi_hit1)
|
| 1043 |
|
|
wb_sel<=8'h11;
|
| 1044 |
|
|
state<=`CPX_READY_2;
|
| 1045 |
|
|
end
|
| 1046 |
|
|
`CPX_READY_2:
|
| 1047 |
|
|
begin
|
| 1048 |
|
|
if(cpx_two_packet && !cpu2)
|
| 1049 |
|
|
begin
|
| 1050 |
|
|
cpx_ready<=1;
|
| 1051 |
|
|
cpx_packet<=cpx_packet_2;
|
| 1052 |
|
|
end
|
| 1053 |
|
|
else
|
| 1054 |
|
|
if(cpu2 && othercpuhit[1])
|
| 1055 |
|
|
begin
|
| 1056 |
|
|
cpx_ready<=1;
|
| 1057 |
|
|
cpx_packet<={1'b1,4'b0011,12'b0,5'b0,pcx_packet_d[64+5:64+4],3'b000,pcx_packet_d[64+11:64+6],inval_vect1};;
|
| 1058 |
|
|
end
|
| 1059 |
|
|
else
|
| 1060 |
|
|
begin
|
| 1061 |
|
|
cpx_ready<=0;
|
| 1062 |
|
|
cpx_packet<=145'b0;
|
| 1063 |
|
|
end
|
| 1064 |
|
|
if(cpx_two_packet && cpu2)
|
| 1065 |
|
|
begin
|
| 1066 |
|
|
cpx1_ready<=1;
|
| 1067 |
|
|
cpx1_packet<=cpx_packet_2;
|
| 1068 |
|
|
end
|
| 1069 |
|
|
else
|
| 1070 |
|
|
if(!cpu2 && othercpuhit[1])
|
| 1071 |
|
|
begin
|
| 1072 |
|
|
cpx1_ready<=1;
|
| 1073 |
|
|
cpx1_packet<={1'b1,4'b0011,12'b0,5'b0,pcx_packet_d[64+5:64+4],3'b001,pcx_packet_d[64+11:64+6],inval_vect1};;
|
| 1074 |
|
|
end
|
| 1075 |
|
|
else
|
| 1076 |
|
|
begin
|
| 1077 |
|
|
cpx1_ready<=0;
|
| 1078 |
|
|
cpx1_packet<=145'b0;
|
| 1079 |
|
|
end
|
| 1080 |
|
|
state<=`PCX_IDLE;
|
| 1081 |
|
|
end
|
| 1082 |
|
|
`PCX_UNKNOWN:
|
| 1083 |
|
|
begin
|
| 1084 |
|
|
wb_sel<=8'b10100101; // Illegal eye-catching value for debugging
|
| 1085 |
|
|
state<=`PCX_IDLE;
|
| 1086 |
|
|
end
|
| 1087 |
|
|
endcase
|
| 1088 |
|
|
|
| 1089 |
|
|
l1dir l1dir_inst(
|
| 1090 |
|
|
.clk(clk),
|
| 1091 |
|
|
.reset(!rstn),
|
| 1092 |
|
|
|
| 1093 |
|
|
.cpu(cpu), // Issuing CPU number
|
| 1094 |
|
|
.strobe(state==`GOT_PCX_REQ),
|
| 1095 |
|
|
.way(pcx_packet[108:107]), // Way to allocate for allocating loads
|
| 1096 |
|
|
.address(pcx_packet[64+39:64]),
|
| 1097 |
|
|
.load(pcx_packet[122:118]==5'b00000),
|
| 1098 |
|
|
.ifill(pcx_packet[122:118]==5'b10000),
|
| 1099 |
|
|
.store(pcx_packet[122:118]==5'b00001),
|
| 1100 |
|
|
.cas(pcx_packet[122:118]==5'b00010),
|
| 1101 |
|
|
.swap(pcx_packet[122:118]==5'b00110),
|
| 1102 |
|
|
.strload(pcx_packet[122:118]==5'b00100),
|
| 1103 |
|
|
.strstore(pcx_packet[122:118]==5'b00101),
|
| 1104 |
|
|
.cacheable((!pcx_packet[117]) && (!pcx_req_d[4])),
|
| 1105 |
|
|
.prefetch(pcx_packet[110]),
|
| 1106 |
|
|
.invalidate(pcx_packet[111]),
|
| 1107 |
|
|
.blockstore(pcx_packet[109] | pcx_packet[110]),
|
| 1108 |
|
|
|
| 1109 |
|
|
.inval_vect0(inval_vect0), // Invalidation vector
|
| 1110 |
|
|
.inval_vect1(inval_vect1),
|
| 1111 |
|
|
.othercachehit(othercachehit), // Other cache hit in the same CPU, wayval0/wayval1
|
| 1112 |
|
|
.othercpuhit(othercpuhit), // Any cache hit in the other CPU, wayval0/wayval1
|
| 1113 |
|
|
.wayval0(wayval0), // Way valid
|
| 1114 |
|
|
.wayval1(wayval1), // Second way valid for ifill
|
| 1115 |
|
|
.ready(ready), // Directory init done
|
| 1116 |
|
|
);
|
| 1117 |
|
|
|
| 1118 |
|
|
endmodule
|
