Subversion Repositories t400

-------------------------------------------------------------------------------

--

-- $Id: t400_pack-p.vhd 179 2009-04-01 19:48:38Z arniml $

--

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

--

-- All rights reserved

--

-------------------------------------------------------------------------------

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,

                         PC_INT);

  -- 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,

                         SKIP_PUSH, SKIP_POP);

  -- 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_INTACK);

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

  type    sio_op_t   is (SIO_NONE,

                         SIO_LOAD);

end t400_pack;