Subversion Repositories t400

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--

-- $Id: t400_pack-p.vhd,v 1.2 2006-05-22 00:01:21 arniml Exp $

--

-- Copyright (c) 2006, Arnim Laeuger (arniml@opencores.org)

--

-- All rights reserved

--

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library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

package t400_pack is

  -- Byte ---------------------------------------------------------------------

  subtype byte_t     is std_logic_vector(7 downto 0);

  -- Data word ----------------------------------------------------------------

  subtype dw_t       is std_logic_vector(3 downto 0);

  -- Misc ranges --------------------------------------------------------------

  subtype dw_range_t is natural range dw_t'range;

  subtype b_range_t  is natural range 5 downto 0;

  subtype br_range_t is natural range 5 downto 4;

  subtype bd_range_t is natural range 3 downto 0;

  -- B address ----------------------------------------------------------------

  subtype b_t        is std_logic_vector(b_range_t);

  subtype br_t       is std_logic_vector(br_range_t);

  subtype bd_t       is std_logic_vector(bd_range_t);

  -- Program counter ----------------------------------------------------------

  subtype pc_t       is unsigned(9 downto 0);

  -- Data memory address vector -----------------------------------------------

  subtype dm_addr_t  is std_logic_vector(5 downto 0);

  -- Decoder data -------------------------------------------------------------

  subtype dec_data_t is std_logic_vector(pc_t'range);

  -- Program counter operations -----------------------------------------------

  type    pc_op_t    is (PC_NONE,

                         PC_INC_PC,

                         PC_LOAD_6, PC_LOAD_7, PC_LOAD_8, PC_LOAD,

                         PC_POP,

                         PC_LOAD_A_M);

  -- Data memory controller operations ----------------------------------------

  type    dmem_op_t  is (DMEM_RB,

                         DMEM_WB_SRC_Q, DMEM_WB_SRC_DEC, DMEM_WB_SRC_A,

                         DMEM_RDEC,

                         DMEM_WB_SET_BIT, DMEM_WB_RES_BIT,

                         DMEM_WDEC_SRC_A);

  type    b_op_t     is (B_NONE,

                         B_SET_BD, B_SET_BR,

                         B_SET_B, B_SET_B_INC,

                         B_XOR_BR,

                         B_INC_BD,

                         B_DEC_BD);

  -- Stack operations ---------------------------------------------------------

  type    stack_op_t is (STACK_NONE,

                         STACK_PUSH,

                         STACK_POP);

  -- ALU operations -----------------------------------------------------------

  type    alu_op_t   is (ALU_NONE,

                         ALU_CLRA,

                         ALU_LOAD_M,

                         ALU_LOAD_Q, ALU_LOAD_G, ALU_LOAD_IN, ALU_LOAD_IL,

                         ALU_LOAD_BR, ALU_LOAD_BD,

                         ALU_LOAD_SIO,

                         ALU_ADD, ALU_ADD_10, ALU_ADD_C, ALU_ADD_DEC,

                         ALU_COMP,

                         ALU_RC, ALU_SC,

                         ALU_XOR);

  -- Skip operations ----------------------------------------------------------

  type    skip_op_t  is (SKIP_NONE,

                         SKIP_UPDATE,

                         SKIP_NOW,

                         SKIP_CARRY, SKIP_C,

                         SKIP_BD_UFLOW, SKIP_BD_OFLOW,

                         SKIP_LBI,

                         SKIP_A_M,

                         SKIP_G_ZERO, SKIP_G_BIT,

                         SKIP_M_BIT,

                         SKIP_TIMER);

  -- IO L port operations -----------------------------------------------------

  type    io_l_op_t  is (IOL_NONE,

                         IOL_LOAD_AM, IOL_LOAD_PM,

                         IOL_OUTPUT_L,

                         IOL_OUTPUT_Q);

  -- IO D port operations -----------------------------------------------------

  type    io_d_op_t  is (IOD_NONE,

                         IOD_LOAD);

  -- IO G port operations -----------------------------------------------------

  type    io_g_op_t  is (IOG_NONE,

                         IOG_LOAD_M,

                         IOG_LOAD_DEC);

  -- IO IN port operations ----------------------------------------------------

  type    io_in_op_t is (IOIN_NONE,

                         IOIN_INIL,

                         IOIN_LEI);

  -- SIO operations -----------------------------------------------------------

  type    sio_op_t   is (SIO_NONE,

                         SIO_LOAD);

  -- Mnemonics ----------------------------------------------------------------

  type    mnemonic_t is (-- Arithmetic instructions

                         MN_ASC,

                         MN_ADD,

                         MN_ADT,

                         MN_AISC,

                         MN_CASC,

                         MN_CLRA,

                         MN_COMP,

                         MN_NOP,

                         MN_C,

                         MN_XOR,

                         -- Transfer of control instructions

                         MN_JID,

                         MN_JMP,

                         MN_JP_JSRP,

                         MN_JSR,

                         MN_RET,

                         MN_RETSK,

                         -- Memory reference instructions

                         MN_LD,

                         MN_LDD_XAD,

                         MN_LQID,

                         MN_RMB,

                         MN_SMB,

                         MN_STII,

                         MN_X,

                         MN_XDS,

                         MN_XIS,

                         -- Register reference instructions

                         MN_CAB,

                         MN_CBA,

                         MN_LBI,

                         MN_XABR,

                         -- Test instructions

                         MN_SKC,

                         MN_SKE,

                         MN_SKMBZ,

                         MN_SKT,

                         -- Input/output instructions

                         MN_EXT,

                         MN_XAS);

end t400_pack;

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-- File History:

--

-- $Log: not supported by cvs2svn $

-- Revision 1.1.1.1  2006/05/06 01:56:45  arniml

-- import from local CVS repository, LOC_CVS_0_1

--

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