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--- Interpreted simulation
--- Copyright (C) 2014 Tristan Gingold
---
--- GHDL is free software; you can redistribute it and/or modify it under
--- the terms of the GNU General Public License as published by the Free
--- Software Foundation; either version 2, or (at your option) any later
--- version.
---
--- GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
--- WARRANTY; without even the implied warranty of MERCHANTABILITY or
--- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
--- for more details.
---
--- You should have received a copy of the GNU General Public License
--- along with GHDL; see the file COPYING. If not, write to the Free
--- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
--- 02111-1307, USA.
-
-with System;
-with Grt.Types; use Grt.Types;
-with Iirs; use Iirs;
-with Iir_Values; use Iir_Values;
-with Elaboration; use Elaboration;
-with Execution; use Execution;
-
-package Simulation is
- Trace_Simulation : Boolean := False;
- Disp_Tree : Boolean := False;
- Disp_Stats : Boolean := False;
- Disp_Ams : Boolean := False;
- Flag_Debugger : Boolean := False;
- Flag_Interractive : Boolean := False;
-
- type Resolv_Instance_Type is record
- Func : Iir;
- Block : Block_Instance_Acc;
- Sig : Iir_Value_Literal_Acc;
- end record;
- type Resolv_Instance_Acc is access Resolv_Instance_Type;
-
- -- The resolution procedure for GRT.
- procedure Resolution_Proc (Instance_Addr : System.Address;
- Val : System.Address;
- Bool_Vec : System.Address;
- Vec_Len : Ghdl_Index_Type;
- Nbr_Drv : Ghdl_Index_Type;
- Nbr_Ports : Ghdl_Index_Type);
- pragma Convention (C, Resolution_Proc);
-
- type Guard_Instance_Type is record
- Instance : Block_Instance_Acc;
- Guard : Iir;
- end record;
-
- type Guard_Instance_Acc is access Guard_Instance_Type;
-
- function Guard_Func (Data : System.Address) return Ghdl_B1;
- pragma Convention (C, Guard_Func);
-
- -- The entry point of the simulator.
- procedure Simulation_Entity (Top_Conf : Iir_Design_Unit);
-
- type Process_State_Array is
- array (Process_Index_Type range <>) of aliased Process_State_Type;
- type Process_State_Array_Acc is access Process_State_Array;
-
- -- Array containing all processes.
- Processes_State: Process_State_Array_Acc;
-
- function Execute_Signal_Value (Indirect: Iir_Value_Literal_Acc)
- return Iir_Value_Literal_Acc;
-
- function Execute_Event_Attribute (Lit: Iir_Value_Literal_Acc)
- return Boolean;
-
- function Execute_Active_Attribute (Lit: Iir_Value_Literal_Acc)
- return Boolean;
- function Execute_Driving_Attribute (Lit: Iir_Value_Literal_Acc)
- return Boolean;
-
- function Execute_Last_Value_Attribute (Indirect: Iir_Value_Literal_Acc)
- return Iir_Value_Literal_Acc;
- function Execute_Driving_Value_Attribute (Indirect: Iir_Value_Literal_Acc)
- return Iir_Value_Literal_Acc;
-
- -- Return the Last_Event absolute time.
- function Execute_Last_Event_Attribute (Indirect: Iir_Value_Literal_Acc)
- return Ghdl_I64;
- function Execute_Last_Active_Attribute (Indirect: Iir_Value_Literal_Acc)
- return Ghdl_I64;
-
- -- Type for a transaction: it contains the value, the absolute time at which
- -- the transaction should occur and a pointer to the next transaction.
- -- This constitute a simple linked list, the elements must be ordered
- -- according to time.
- type Transaction_El_Type is record
- -- The value of the waveform element.
- -- Can't be an array.
- -- Life must be target.
- Value: Iir_Value_Literal_Acc;
-
- -- After time at which the transaction should occur.
- After : Grt.Types.Std_Time;
- end record;
-
- type Transaction_Array is array (Natural range <>) of Transaction_El_Type;
-
- type Transaction_Type (Len : Natural) is record
- -- Statement that created this transaction. Used to disp location
- -- in case of error (constraint error).
- Stmt: Iir;
-
- Reject : Std_Time;
-
- Els : Transaction_Array (1 .. Len);
- end record;
-
- procedure Assign_Value_To_Signal (Instance: Block_Instance_Acc;
- Target: Iir_Value_Literal_Acc;
- Transaction: Transaction_Type);
-
- procedure Disconnect_Signal (Sig : Iir_Value_Literal_Acc);
-
- -- Return true if the process should be suspended.
- function Execute_Wait_Statement (Instance : Block_Instance_Acc;
- Stmt: Iir_Wait_Statement)
- return Boolean;
-end Simulation;