iface.vhd

sparc org, vhdl rtl code

type icram_out_type is record
  itramout	: itram_out_type;
  idramout	: idram_out_type;
end record;

type dcram_in_type is record
  dtramin	: dtram_in_type;
  ddramin	: ddram_in_type;
  ldramin	: ldram_in_type;
  dtraminsn     : dtramsn_in_type;
end record;

type dcram_out_type is record
  dtramout	: dtram_out_type;
  ddramout	: ddram_out_type;
  dtramoutsn    : dtramsn_out_type;
end record;

type cram_in_type is record
  icramin	: icram_in_type;
  dcramin	: dcram_in_type;
end record;

type cram_out_type is record
  icramout	: icram_out_type;
  dcramout	: dcram_out_type;
end record;



-- iu pipeline control type (defined here to be visible to debug and coprocessor)

type pipeline_control_type is record
  inst   : std_logic_vector(31 downto 0);     -- instruction word
  pc     : std_logic_vector(31 downto PCLOW);     -- program counter
  annul  : std_logic;			      -- instruction annul
  cnt    : std_logic_vector(1 downto 0);      -- cycle number (multi-cycle inst)
  ld     : std_logic;			      -- load cycle
  pv     : std_logic;			      -- PC valid
  rett   : std_logic;			      -- RETT indicator
  trap   : std_logic;			      -- trap pending flag
  tt     : std_logic_vector(5 downto 0);      -- trap type
  rd     : std_logic_vector(RABITS-1 downto 0); -- destination register address
end record;
  
-- Stucture for FPU/CP control
type cp_debug_in_type is record
  daddr      : std_logic_vector(4 downto 0);
  dread_fsr  : std_logic;
  dwrite_fsr : std_logic;  
  denable    : std_logic;
  dwrite     : std_logic;
  ddata      : std_logic_vector(31 downto 0);
end record;                           

type cp_debug_out_type is record
  ddata       : std_logic_vector(63 downto 0);
  wr_fp       : std_logic;
  wr2_fp      : std_logic;
  write_fpreg : std_logic_vector(1 downto 0);
  write_fsr   : std_logic;
  fpreg       : std_logic_vector(3 downto 0);
  op          : std_logic_vector(31 downto 0);
  pc          : std_logic_vector(31 downto PCLOW);
end record;

type cp_in_type is record
  flush  	: std_logic;			  -- pipeline flush
  exack    	: std_logic;			  -- CP exception acknowledge
  fdata         : std_logic_vector(31 downto 0);  -- fetch stage data
  frdy          : std_logic;                      -- fetch stage data ready  
  dannul   	: std_logic;			  -- decode stage annul
  dtrap    	: std_logic;			  -- decode stage trap
  dcnt          : std_logic_vector(1 downto 0);     -- decode stage cycle counter
  dinst         : std_logic_vector(31 downto 0);     -- decode stage instruction
  ex       	: pipeline_control_type;	  -- iu pipeline ctrl (ex)
  me       	: pipeline_control_type;	  -- iu pipeline ctrl (me)
  wr       	: pipeline_control_type;	  -- iu pipeline ctrl (wr)
  lddata        : std_logic_vector(31 downto 0);     -- load data
  debug         : cp_debug_in_type;               -- CP debug signals    
end record;

type cp_out_type is record
  data          : std_logic_vector(31 downto 0); -- store data
  exc  	        : std_logic;			 -- CP exception
  cc            : std_logic_vector(1 downto 0);  -- CP condition codes
  ccv  	        : std_logic;			 -- CP condition codes valid
  holdn	        : std_logic;			 -- CP pipeline hold
  ldlock        : std_logic;			 -- CP load/store interlock
  debug         : cp_debug_out_type;             -- CP debug signals
end record;


-- iu debug port
type iu_debug_in_type is record
  dsuen   : std_logic;  -- DSU enable
  dbreak  : std_logic;  -- debug break-in
  btrapa  : std_logic;	-- break on IU trap
  btrape  : std_logic;	-- break on IU trap
  berror  : std_logic;	-- break on IU error mode
  bwatch  : std_logic;	-- break on IU watchpoint
  bsoft   : std_logic;	-- break on software breakpoint (TA 1)
  rerror  : std_logic;	-- reset processor error mode
  step    : std_logic;	-- single step
  denable : std_logic; 	-- diagnostic register access enable
  dwrite   : std_logic;  -- read/write
  daddr   : std_logic_vector(21 downto 2); -- diagnostic address
  ddata   : std_logic_vector(31 downto 0); -- diagnostic data
end record;

type iu_debug_out_type is record
  clk   : std_logic;
  rst   : std_logic;
  holdn : std_logic;
  ex	: pipeline_control_type;
  me	: pipeline_control_type;
  wr	: pipeline_control_type;
  write_reg  : std_logic;
  mresult : std_logic_vector(31 downto 0);
  result  : std_logic_vector(31 downto 0);
  trap    : std_logic;
  error   : std_logic;
  dmode   : std_logic;
  dmode2  : std_logic;
  vdmode  : std_logic;
  dbreak  : std_logic;
  tt      : std_logic_vector(7 downto 0);
  psrtt   : std_logic_vector(7 downto 0);
  psrpil  : std_logic_vector(3 downto 0);
  diagrdy : std_logic;
  ddata   : std_logic_vector(31 downto 0);   -- diagnostic data
  fpdbg   : cp_debug_out_type;
end record;

type iu_in_type is record
  irl              : std_logic_vector(3 downto 0); -- interrupt request level
  debug   : iu_debug_in_type;
end record;

type iu_out_type is record
  error   : std_logic;
  intack  : std_logic;
  irqvec  : std_logic_vector(3 downto 0);
  ipend   : std_logic;
  debug	  : iu_debug_out_type;
end record;

-- Meiko FPU interface
type fpu_in_type is record
    FpInst     : std_logic_vector(9 downto 0);
    FpOp       : std_logic;
    FpLd       : std_logic;
    Reset      : std_logic;
    fprf_dout1 : std_logic_vector(63 downto 0);
    fprf_dout2 : std_logic_vector(63 downto 0);
    RoundingMode : std_logic_vector(1 downto 0);
    ss_scan_mode : std_logic;
    fp_ctl_scan_in : std_logic;
    fpuholdn   : std_logic;
end record;

type fpu_out_type is record
    FpBusy     : std_logic;
    FracResult : std_logic_vector(54 downto 3);
    ExpResult  : std_logic_vector(10 downto 0);
    SignResult : std_logic;
    SNnotDB    : std_logic;
    Excep      : std_logic_vector(5 downto 0);
    ConditionCodes : std_logic_vector(1 downto 0);
    fp_ctl_scan_out : std_logic;
end record;

type cp_unit_in_type is record		-- coprocessor execution unit input
  op1      : std_logic_vector (63 downto 0); -- operand 1
  op2      : std_logic_vector (63 downto 0); -- operand 2
  opcode   : std_logic_vector (9 downto 0);  -- opcode
  start    : std_logic;		             -- start
  load     : std_logic;		             -- load operands
  flush    : std_logic;		             -- cancel operation
end record;

type cp_unit_out_type is record	-- coprocessor execution unit output
  res      : std_logic_vector (63 downto 0); -- result
  cc       : std_logic_vector (1 downto 0);  -- condition codes
  exc      : std_logic_vector (5 downto 0);  -- exception
  busy     : std_logic;		             -- eu busy  
end record;

-- pci_[in|out]_type groups all EXTERNAL pci ports in unidirectional form
-- as well as the required enable signals for the pads
type pci_in_type is record

  pci_rst_in_n 	   : std_logic;
  pci_gnt_in_n 	   : std_logic;
  pci_idsel_in 	   : std_logic;
 
  pci_adin 	   : std_logic_vector(31 downto 0);
  pci_cbein_n 	   : std_logic_vector(3 downto 0);
  pci_frame_in_n   : std_logic;
  pci_irdy_in_n    : std_logic;
  pci_trdy_in_n    : std_logic;
  pci_devsel_in_n  : std_logic;
  pci_stop_in_n    : std_logic;
  pci_lock_in_n    : std_logic;
  pci_perr_in_n    : std_logic;
  pci_serr_in_n    : std_logic;
  pci_par_in 	   : std_logic;
  pci_host   	   : std_logic;
  pci_66       	   : std_logic;
  pme_status   	   : std_logic;

end record;


type pci_out_type is record

  pci_aden_n 	   : std_logic_vector(31 downto 0);
  pci_cbe0_en_n    : std_logic;
  pci_cbe1_en_n    : std_logic;
  pci_cbe2_en_n    : std_logic;
  pci_cbe3_en_n    : std_logic;
  
  pci_frame_en_n   : std_logic;
  pci_irdy_en_n    : std_logic;
  pci_trdy_en_n    : std_logic;
  pci_devsel_en_n    : std_logic;
  pci_stop_en_n    : std_logic;
  pci_ctrl_en_n    : std_logic;
  pci_perr_en_n    : std_logic;
  pci_par_en_n 	   : std_logic;
  pci_req_en_n 	   : std_logic;
  pci_lock_en_n    : std_logic;
  pci_serr_en_n    : std_logic;
  pci_int_en_n     : std_logic;

  pci_req_out_n    : std_logic;
  pci_adout 	   : std_logic_vector(31 downto 0);
  pci_cbeout_n 	   : std_logic_vector(3 downto 0);
  pci_frame_out_n  : std_logic;
  pci_irdy_out_n   : std_logic;
  pci_trdy_out_n   : std_logic;
  pci_devsel_out_n : std_logic;
  pci_stop_out_n   : std_logic;
  pci_perr_out_n   : std_logic;
  pci_serr_out_n   : std_logic;
  pci_par_out 	   : std_logic;
  pci_lock_out_n   : std_logic;
  power_state  	   : std_logic_vector(1 downto 0);
  pme_enable   	   : std_logic;
  pme_clear    	   : std_logic;
  pci_int_out_n	   : std_logic;

end record;

type div_in_type is record
  op1              : std_logic_vector(32 downto 0); -- operand 1
  op2              : std_logic_vector(32 downto 0); -- operand 2
  y                : std_logic_vector(32 downto 0); -- Y (MSB divident)
  flush            : std_logic;
  signed           : std_logic;
  start            : std_logic;
end record;

type div_out_type is record
  ready           : std_logic;
  icc             : std_logic_vector(3 downto 0); -- ICC
  result          : std_logic_vector(31 downto 0); -- div result
end record;

type mul_in_type is record
  op1              : std_logic_vector(32 downto 0); -- operand 1
  op2              : std_logic_vector(32 downto 0); -- operand 2
  flush            : std_logic;
  signed           : std_logic;
  start            : std_logic;
  mac              : std_logic;
  y                : std_logic_vector(7 downto 0); -- Y (MSB MAC register)
  asr18           : std_logic_vector(31 downto 0); -- LSB MAC register
end record;

type mul_out_type is record
  ready           : std_logic;
  icc             : std_logic_vector(3 downto 0); -- ICC
  result          : std_logic_vector(63 downto 0); -- mul result
end record;

type ahb_dma_in_type is record
  address         : std_logic_vector(31 downto 0);
  wdata           : std_logic_vector(31 downto 0);
  start           : std_logic;
  burst           : std_logic;
  write           : std_logic;
  size            : std_logic_vector(1 downto 0);
end record;

type ahb_dma_out_type is record
  start           : std_logic;
  active          : std_logic;
  ready           : std_logic;
  retry           : std_logic;
  mexc            : std_logic;
  haddr           : std_logic_vector(9 downto 0);
  rdata           : std_logic_vector(31 downto 0);
end record;

type actpci_be_in_type is record
  mem_ad_int      : std_logic_vector(31 downto 0);
  mem_data        : std_logic_vector(31 downto 0);
  dp_done         : std_logic;