Subversion Repositories myblaze

# -*- coding: utf-8 -*-

"""

    core.py

    =======

    MyBlaze Core, top level entity

    :copyright: Copyright (c) 2010 Jian Luo

    :author-email: jian.luo.cn(at_)gmail.com

    :license: LGPL, see LICENSE for details

    :revision: $Id: core.py 5 2010-11-21 10:59:30Z rockee $

"""

from myhdl import *

from defines import *

from functions import *

from fetch import *

from decoder import *

from execute import *

from memory import *

def MyBlazeCore(

        clock,

        reset,

        dmem_ena_in,

        dmem_data_in,

        dmem_data_out,

        dmem_sel_out,

        dmem_we_out,

        dmem_addr_out,

        dmem_ena_out,

        imem_data_in,

        imem_addr_out,

        imem_ena_out,

        # if __debug__:

        #debug_if_program_counter,

        #debug_of_alu_op,

        #debug_of_alu_src_a,

        #debug_of_alu_src_b,

        #debug_of_branch_cond,

        #debug_of_carry,

        #debug_of_carry_keep,

        #debug_of_delay,

        #debug_of_hazard,

        #debug_of_immediate,

        #debug_of_instruction,

        #debug_of_mem_read,

        #debug_of_mem_write,

        #debug_of_operation,

        #debug_of_program_counter,

        #debug_of_reg_a,

        #debug_of_reg_b,

        #debug_of_reg_d,

        #debug_of_reg_write,

        #debug_of_transfer_size,

        #debug_of_fwd_mem_result,

        #debug_of_fwd_reg_d,

        #debug_of_fwd_reg_write,

        #debug_gprf_dat_a,

        #debug_gprf_dat_b,

        #debug_gprf_dat_d,

        #debug_ex_alu_result,

        #debug_ex_reg_d,

        #debug_ex_reg_write,

        #debug_ex_branch,

        #debug_ex_dat_d,

        #debug_ex_flush_id,

        #debug_ex_mem_read,

        #debug_ex_mem_write,

        #debug_ex_program_counter,

        #debug_ex_transfer_size,

        #debug_ex_dat_a,

        #debug_ex_dat_b,

        #debug_ex_instruction,

        #debug_ex_reg_a,

        #debug_ex_reg_b,

        #debug_mm_alu_result,

        #debug_mm_mem_read,

        #debug_mm_reg_d,

        #debug_mm_reg_write,

        #debug_mm_transfer_size,

        ):

    """

    """

    #of_instruction = Signal(False)

    #if __debug__:

        #of_instruction = Signal(intbv(0)[CFG_IMEM_WIDTH:])

    if_program_counter = Signal(intbv(0)[CFG_IMEM_SIZE:])

    gprf_dat_a = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    gprf_dat_b = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    gprf_dat_d = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    of_alu_op = Signal(alu_operation.ALU_ADD)

    of_alu_src_a = Signal(src_type_a.REGA)

    of_alu_src_b = Signal(src_type_b.REGB)

    of_branch_cond = Signal(branch_condition.NOP)

    of_carry = Signal(carry_type.C_ZERO)

    of_carry_keep = Signal(False)

    of_delay = Signal(False)

    of_hazard = Signal(False)

    of_immediate = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    of_mem_read = Signal(False)

    of_mem_write = Signal(False)

    of_operation = Signal(False)

    of_program_counter = Signal(intbv(0)[CFG_IMEM_SIZE:])

    of_reg_a = Signal(intbv(0)[5:])

    of_reg_b = Signal(intbv(0)[5:])

    of_reg_d = Signal(intbv(0)[5:])

    of_reg_write = Signal(False)

    of_transfer_size = Signal(transfer_size_type.WORD)

    # Write back stage forwards

    of_fwd_mem_result = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    of_fwd_reg_d = Signal(intbv(0)[5:])

    of_fwd_reg_write = Signal(False)

    ex_alu_result = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    ex_reg_d = Signal(intbv(0)[5:])

    ex_reg_write = Signal(False)

    ex_branch = Signal(False)

    ex_dat_d = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    ex_flush_id = Signal(False)

    ex_mem_read = Signal(False)

    ex_mem_write = Signal(False)

    ex_program_counter = Signal(intbv(0)[CFG_IMEM_SIZE:])

    ex_transfer_size = Signal(transfer_size_type.WORD)

    # if __debug__:

    #ex_dat_a = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    #ex_dat_b = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    #ex_instruction = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    #ex_reg_a = Signal(intbv(0)[5:])

    #ex_reg_b = Signal(intbv(0)[5:])

    mm_alu_result = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    mm_mem_read = Signal(False)

    mm_reg_d = Signal(intbv(0)[5:])

    mm_reg_write = Signal(False)

    mm_transfer_size = Signal(transfer_size_type.WORD)

    ftch = FetchUnit(

        clock=clock,

        reset=reset,

        enable=dmem_ena_in,

        of_hazard=of_hazard,

        ex_alu_result=ex_alu_result,

        ex_branch=ex_branch,

        if_program_counter=if_program_counter,

        imem_addr_out=imem_addr_out,

        imem_ena_out=imem_ena_out,

    )

    deco = Decoder(

        clock=clock,

        reset=reset,

        enable=dmem_ena_in,

        dmem_data_in=dmem_data_in,

        imem_data_in=imem_data_in,

        if_program_counter=if_program_counter,

        ex_flush_id=ex_flush_id,

        mm_alu_result=mm_alu_result,

        mm_mem_read=mm_mem_read,

        mm_reg_d=mm_reg_d,

        mm_reg_write=mm_reg_write,

        mm_transfer_size=mm_transfer_size,

        gprf_dat_a=gprf_dat_a,

        gprf_dat_b=gprf_dat_b,

        gprf_dat_d=gprf_dat_d,

        of_alu_op=of_alu_op,

        of_alu_src_a=of_alu_src_a,

        of_alu_src_b=of_alu_src_b,

        of_branch_cond=of_branch_cond,

        of_carry=of_carry,

        of_carry_keep=of_carry_keep,

        of_delay=of_delay,

        of_hazard=of_hazard,

        of_immediate=of_immediate,

        of_mem_read=of_mem_read,

        of_mem_write=of_mem_write,

        of_operation=of_operation,

        of_program_counter=of_program_counter,

        of_reg_a=of_reg_a,

        of_reg_b=of_reg_b,

        of_reg_d=of_reg_d,

        of_reg_write=of_reg_write,

        of_transfer_size=of_transfer_size,

        # Write back stage output

        of_fwd_mem_result=of_fwd_mem_result,

        of_fwd_reg_d=of_fwd_reg_d,

        of_fwd_reg_write=of_fwd_reg_write,

        # if __debug__:

        #of_instruction=of_instruction,

    )

    exeu = ExecuteUnit(

        # Inputs

        clock=clock,

        reset=reset,

        enable=dmem_ena_in,

        dmem_data_in=dmem_data_in,

        gprf_dat_a=gprf_dat_a,

        gprf_dat_b=gprf_dat_b,

        gprf_dat_d=gprf_dat_d,

        mm_alu_result=mm_alu_result,

        mm_mem_read=mm_mem_read,

        mm_reg_d=mm_reg_d,

        mm_reg_write=mm_reg_write,

        mm_transfer_size=mm_transfer_size,

        of_alu_op=of_alu_op,

        of_alu_src_a=of_alu_src_a,

        of_alu_src_b=of_alu_src_b,

        of_branch_cond=of_branch_cond,

        of_carry=of_carry,

        of_carry_keep=of_carry_keep,

        of_delay=of_delay,

        of_immediate=of_immediate,

        of_mem_read=of_mem_read,

        of_mem_write=of_mem_write,

        of_operation=of_operation,

        of_program_counter=of_program_counter,

        of_reg_a=of_reg_a,

        of_reg_b=of_reg_b,

        of_reg_d=of_reg_d,

        of_reg_write=of_reg_write,

        of_transfer_size=of_transfer_size,

        # Write back stage forwards,

        of_fwd_mem_result=of_fwd_mem_result,

        of_fwd_reg_d=of_fwd_reg_d,

        of_fwd_reg_write=of_fwd_reg_write,

        # Outputs

        ex_alu_result=ex_alu_result,

        ex_reg_d=ex_reg_d,

        ex_reg_write=ex_reg_write,

        ex_branch=ex_branch,

        ex_dat_d=ex_dat_d,

        ex_flush_id=ex_flush_id,

        ex_mem_read=ex_mem_read,

        ex_mem_write=ex_mem_write,

        ex_program_counter=ex_program_counter,

        ex_transfer_size=ex_transfer_size,

        # if __debug__

        #of_instruction=of_instruction,

        #ex_dat_a=ex_dat_a,

        #ex_dat_b=ex_dat_b,

        #ex_instruction=ex_instruction,

        #ex_reg_a=ex_reg_a,

        #ex_reg_b=ex_reg_b,

    )

    memu = MemUnit(

        # Inputs

        clock=clock,

        reset=reset,

        enable=dmem_ena_in,

        ex_alu_result=ex_alu_result,

        ex_reg_d=ex_reg_d,

        ex_reg_write=ex_reg_write,

        ex_branch=ex_branch,

        ex_dat_d=ex_dat_d,

        ex_mem_read=ex_mem_read,

        ex_mem_write=ex_mem_write,

        ex_program_counter=ex_program_counter,

        ex_transfer_size=ex_transfer_size,

        # Outputs

        mm_alu_result=mm_alu_result,

        mm_mem_read=mm_mem_read,

        mm_reg_d=mm_reg_d,

        mm_reg_write=mm_reg_write,

        mm_transfer_size=mm_transfer_size,

        dmem_data_out=dmem_data_out,

        dmem_sel_out=dmem_sel_out,

        dmem_we_out=dmem_we_out,

        dmem_addr_out=dmem_addr_out,

        dmem_ena_out=dmem_ena_out,

    )

    #@always_comb

    #def debug_output():

        #debug_if_program_counter.next = if_program_counter

        #debug_of_alu_op.next = of_alu_op

        #debug_of_alu_src_a.next = of_alu_src_a

        #debug_of_alu_src_b.next = of_alu_src_b

        #debug_of_branch_cond.next = of_branch_cond

        #debug_of_carry.next = of_carry

        #debug_of_carry_keep.next = of_carry_keep

        #debug_of_delay.next = of_delay

        #debug_of_hazard.next = of_hazard

        #debug_of_immediate.next = of_immediate

        #debug_of_instruction.next = of_instruction

        #debug_of_mem_read.next = of_mem_read

        #debug_of_mem_write.next = of_mem_write

        #debug_of_operation.next = of_operation

        #debug_of_program_counter.next = of_program_counter

        #debug_of_reg_a.next = of_reg_a

        #debug_of_reg_b.next = of_reg_b

        #debug_of_reg_d.next = of_reg_d

        #debug_of_reg_write.next = of_reg_write

        #debug_of_transfer_size.next = of_transfer_size

        #debug_of_fwd_mem_result.next = of_fwd_mem_result

        #debug_of_fwd_reg_d.next = of_fwd_reg_d

        #debug_of_fwd_reg_write.next = of_fwd_reg_write

        #debug_gprf_dat_a.next = gprf_dat_a

        #debug_gprf_dat_b.next = gprf_dat_b

        #debug_gprf_dat_d.next = gprf_dat_d

        #debug_ex_alu_result.next = ex_alu_result

        #debug_ex_reg_d.next = ex_reg_d

        #debug_ex_reg_write.next = ex_reg_write

        #debug_ex_branch.next = ex_branch

        #debug_ex_dat_d.next = ex_dat_d

        #debug_ex_flush_id.next = ex_flush_id

        #debug_ex_mem_read.next = ex_mem_read

        #debug_ex_mem_write.next = ex_mem_write

        #debug_ex_program_counter.next = ex_program_counter

        #debug_ex_transfer_size.next = ex_transfer_size

        #debug_ex_dat_a.next = ex_dat_a

        #debug_ex_dat_b.next = ex_dat_b

        #debug_ex_instruction.next = ex_instruction

        #debug_ex_reg_a.next = ex_reg_a

        #debug_ex_reg_b.next = ex_reg_b

        #debug_mm_alu_result.next = mm_alu_result

        #debug_mm_mem_read.next = mm_mem_read

        #debug_mm_reg_d.next = mm_reg_d

        #debug_mm_reg_write.next = mm_reg_write

        #debug_mm_transfer_size.next = mm_transfer_size

    return instances()

def bench():

    clock = Signal(False)

    reset = Signal(False)

    dmem_ena_in = Signal(False)

    dmem_data_in = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    dmem_data_out = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    dmem_sel_out = Signal(intbv(0)[4:])

    dmem_we_out = Signal(False)

    dmem_addr_out = Signal(intbv(0)[CFG_DMEM_SIZE:])

    dmem_ena_out = Signal(False)

    imem_data_in = Signal(intbv(0)[CFG_IMEM_WIDTH:])

    imem_addr_out = Signal(intbv(0)[CFG_IMEM_SIZE:])

    imem_ena_out = Signal(False)

    core = MyBlazeCore(

        clock=clock,

        reset=reset,

        dmem_ena_in=dmem_ena_in,

        dmem_data_in=dmem_data_in,

        dmem_data_out=dmem_data_out,

        dmem_sel_out=dmem_sel_out,

        dmem_we_out=dmem_we_out,

        dmem_addr_out=dmem_addr_out,

        dmem_ena_out=dmem_ena_out,

        imem_data_in=imem_data_in,

        imem_addr_out=imem_addr_out,

        imem_ena_out=imem_ena_out,

    )

    #code = ['001000''00','001''00000','0000''0000','0000''0001', # addi r1,r0,1

            #'001000''00','010''00000','0000''0000','0000''0010', # addi r1,r0,2

            #'001000''00','011''00000','0000''0000','0000''0011', # addi r1,r0,3

            #'001000''00','100''00000','0000''0000','0000''0100', # addi r1,r0,4

            #'001000''00','101''00000','0000''0000','0000''0101', # addi r1,r0,5

            #'001000''00','110''00000','0000''0000','0000''0110', # addi r1,r0,6

            #'001000''00','111''00000','0000''0000','0000''0111', # addi r1,r0,7

            #'001000''01','000''00000','0000''0000','0000''1000', # addi r1,r0,8

            #]

    #imem = [int(x, 16) for x in code]

    imem = []

    for x in open('rom.vmem').readlines():

        x = int(x, 16)

        imem.append((x>>24)%256)

        imem.append((x>>16)%256)

        imem.append((x>>8)%256)

        imem.append((x>>0)%256)

    dmem = imem

    print 'memory size: 0x%04x' % len(imem)

    #imem = [int(x, 16) for x in open('rom.vmem').readlines()]

    #dmem = [Signal(intbv(0)[32:]) for i in range(2**14)]

    import re

    @always(delay(10))

    def clockgen():

        clock.next = not clock

    @instance

    def ram():

        while 1:

            yield clock.posedge

            if dmem_ena_out:

                dmem_ena_in.next = False

                addr = int(dmem_addr_out)

                aligned_addr = (dmem_addr_out/4*4)

                if (dmem_sel_out == 0b1000 or

                    dmem_sel_out == 0b0100 or

                    dmem_sel_out == 0b0010 or

                    dmem_sel_out == 0b0001):

                    size = 1

                elif (dmem_sel_out == 0b1100 or

                      dmem_sel_out == 0b0011) and addr%2==0:

                    size = 2

                elif dmem_sel_out == 0b1111 and addr%4==0:

                    size = 4

                else:

                    assert False

                if dmem_we_out:

                    if size==1:

                        if addr == 0xffffffc0:

                            print chr(dmem_data_out%256),

                        else:

                            dmem[addr] = dmem_data_out%256

                    elif size==2:

                        dmem[addr] = (dmem_data_out>>8)%256

                        dmem[addr+1] = dmem_data_out%256

                    else:

                        dmem[addr] = (dmem_data_out>>24)%256

                        dmem[addr+1] = (dmem_data_out>>16)%256

                        dmem[addr+2] = (dmem_data_out>>8)%256

                        dmem[addr+3] = (dmem_data_out>>0)%256

                    #dmem[dmem_addr_out/4].next = dmem_data_out

                    #print 'write addr=0x%08x data=0x%08x' % (dmem_addr_out, dmem_data_out)

                else:

                    dmem_data_in.next = (

                                             ((dmem[aligned_addr]%256)<<24)

                                            +((dmem[aligned_addr+1]%256)<<16)

                                            +((dmem[aligned_addr+2]%256)<<8)

                                            +(dmem[aligned_addr+3]%256)

                                        )

                #yield clock.posedge

                yield clock.posedge

            dmem_ena_in.next = True

    @instance

    def stimulus():

        reset.next = True

        yield delay(33)

        reset.next = False

        dmem_ena_in.next = True

        yield reset.negedge

        #for i in range(len(imem)):

        while 1:

            iaddr = int(imem_addr_out)

            if iaddr >= len(imem):

                break

            #print 'cycle %d: imem addr:=0x%x code:=0x%08x\n' % (

                    #i, iaddr, imem[iaddr/4])

            word = (((imem[iaddr]%256)<<24)

                   +((imem[iaddr+1]%256)<<16)

                   +((imem[iaddr+2]%256)<<8)

                   +(imem[iaddr+3]%256))

            #print 'imem addr:=0x%x code:=0x%08x' % (iaddr, word)

            #print '<dissemble> %s' % code.get(iaddr)

            imem_data_in.next = word

            yield clock.negedge

        for i in range(8):

            #print 'cycle %d: imem addr:=0x%x code:=NOP' % (i+len(imem),

                                                         #imem_addr_out)

            imem_data_in.next = 0

            yield clock.negedge

        StopSimulation()

        assert False # map(int, dmem[:4]

    return instances()

if __name__ == '__main__':

  if 0:

    clock = Signal(False)

    reset = Signal(False)

    dmem_ena_in = Signal(False)

    dmem_data_in = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    dmem_data_out = Signal(intbv(0)[CFG_DMEM_WIDTH:])

    dmem_sel_out = Signal(intbv(0)[4:])

    dmem_we_out = Signal(False)

    dmem_addr_out = Signal(intbv(0)[CFG_DMEM_SIZE:])

    dmem_ena_out = Signal(False)

    imem_data_in = Signal(intbv(0)[CFG_IMEM_WIDTH:])

    imem_addr_out = Signal(intbv(0)[CFG_IMEM_SIZE:])

    imem_ena_out = Signal(False)

    kw = dict(

        func=MyBlazeCore,

        clock=clock,

        reset=reset,

        dmem_ena_in=dmem_ena_in,

        dmem_data_in=dmem_data_in,

        dmem_data_out=dmem_data_out,

        dmem_sel_out=dmem_sel_out,

        dmem_we_out=dmem_we_out,

        dmem_addr_out=dmem_addr_out,

        dmem_ena_out=dmem_ena_out,

        imem_data_in=imem_data_in,

        imem_addr_out=imem_addr_out,

        imem_ena_out=imem_ena_out,

    )

    toVHDL(**kw)

    toVerilog(**kw)

  else:

    tb = bench()

    #tb = traceSignals(bench)

    Simulation(tb).run(2000000)

### EOF ###

# vim:smarttab:sts=4:ts=4:sw=4:et:ai:tw=80: