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|
-- Configuration generation.
-- Copyright (C) 2002, 2003, 2004, 2005 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 Libraries;
with Errorout; use Errorout;
with Std_Package;
with Name_Table; use Name_Table;
with Flags;
with Iirs_Utils; use Iirs_Utils;
package body Configuration is
procedure Add_Design_Concurrent_Stmts (Parent : Iir);
procedure Add_Design_Block_Configuration (Blk : Iir_Block_Configuration);
procedure Add_Design_Aspect (Aspect : Iir; Add_Default : Boolean);
Current_File_Dependence : Iir_List := Null_Iir_List;
Current_Configuration : Iir_Configuration_Declaration := Null_Iir;
-- UNIT is a design unit of a configuration declaration.
-- Fill the DESIGN_UNITS table with all design units required to build
-- UNIT.
procedure Add_Design_Unit (Unit : Iir_Design_Unit; From : Iir)
is
List : Iir_List;
El : Iir;
Lib_Unit : Iir;
File : Iir_Design_File;
Prev_File_Dependence : Iir_List;
begin
if Flag_Build_File_Dependence then
-- The current file depends on unit.
File := Get_Design_File (Unit);
if Current_File_Dependence /= Null_Iir_List then
-- (There is no dependency for default configuration).
Add_Element (Current_File_Dependence, File);
end if;
end if;
-- If already in the table, then nothing to do.
if Get_Configuration_Mark_Flag (Unit) then
-- There might be some direct recursions:
-- * the default configuration might be implicitly referenced by
-- a direct entity instantiation
-- * a configuration may be referenced by itself for a recursive
-- instantiation
pragma Assert (Get_Configuration_Done_Flag (Unit)
or else (Get_Kind (Get_Library_Unit (Unit))
= Iir_Kind_Configuration_Declaration));
return;
end if;
Set_Configuration_Mark_Flag (Unit, True);
-- May be enabled to debug dependency construction.
if False then
if From = Null_Iir then
Report_Msg (Msgid_Note, Elaboration, Get_Location (Unit),
Disp_Node (Unit) & " added");
else
Report_Msg (Msgid_Note, Elaboration, Get_Location (From),
Disp_Node (Unit) & " added by " & Disp_Node (From));
end if;
end if;
Lib_Unit := Get_Library_Unit (Unit);
if Flag_Build_File_Dependence then
-- Switch current_file_dependence to the design file of Unit.
Prev_File_Dependence := Current_File_Dependence;
if Get_Kind (Lib_Unit) = Iir_Kind_Configuration_Declaration
and then Get_Identifier (Lib_Unit) = Null_Identifier
then
-- Do not add dependence for default configuration.
Current_File_Dependence := Null_Iir_List;
else
File := Get_Design_File (Unit);
Current_File_Dependence := Get_File_Dependence_List (File);
-- Create a list if not yet created.
if Current_File_Dependence = Null_Iir_List then
Current_File_Dependence := Create_Iir_List;
Set_File_Dependence_List (File, Current_File_Dependence);
end if;
end if;
end if;
if Flag_Load_All_Design_Units then
Libraries.Load_Design_Unit (Unit, From);
end if;
-- Add packages from depend list.
-- If Flag_Build_File_Dependences is set, add design units of the
-- dependence list are added, because of LRM 11.4 Analysis Order.
-- Note: a design unit may be referenced but unused.
-- (eg: component specification which does not apply).
List := Get_Dependence_List (Unit);
for I in Natural loop
El := Get_Nth_Element (List, I);
exit when El = Null_Iir;
El := Libraries.Find_Design_Unit (El);
if El /= Null_Iir then
Lib_Unit := Get_Library_Unit (El);
if Flag_Build_File_Dependence then
Add_Design_Unit (El, Unit);
else
case Get_Kind (Lib_Unit) is
when Iir_Kinds_Package_Declaration
| Iir_Kind_Context_Declaration =>
Add_Design_Unit (El, Unit);
when others =>
null;
end case;
end if;
end if;
end loop;
-- Lib_Unit may have changed.
Lib_Unit := Get_Library_Unit (Unit);
case Get_Kind (Lib_Unit) is
when Iir_Kind_Package_Declaration =>
-- Analyze the package declaration, so that Set_Package below
-- will set the full package (and not a stub).
Libraries.Load_Design_Unit (Unit, From);
Lib_Unit := Get_Library_Unit (Unit);
when Iir_Kind_Package_Instantiation_Declaration =>
-- The uninstantiated package is part of the dependency.
null;
when Iir_Kind_Configuration_Declaration =>
-- Add entity and architecture.
-- find all sub-configuration
Libraries.Load_Design_Unit (Unit, From);
Lib_Unit := Get_Library_Unit (Unit);
Add_Design_Unit (Get_Design_Unit (Get_Entity (Lib_Unit)), Unit);
declare
Blk : Iir_Block_Configuration;
Prev_Configuration : Iir_Configuration_Declaration;
Arch : Iir;
begin
Prev_Configuration := Current_Configuration;
Current_Configuration := Lib_Unit;
Blk := Get_Block_Configuration (Lib_Unit);
Add_Design_Block_Configuration (Blk);
Current_Configuration := Prev_Configuration;
Arch := Strip_Denoting_Name (Get_Block_Specification (Blk));
Add_Design_Unit (Get_Design_Unit (Arch), Unit);
end;
when Iir_Kind_Architecture_Body =>
-- Add entity
-- find all entity/architecture/configuration instantiation
Add_Design_Unit (Get_Design_Unit (Get_Entity (Lib_Unit)), Unit);
Add_Design_Concurrent_Stmts (Lib_Unit);
when Iir_Kind_Entity_Declaration =>
null;
when Iir_Kind_Package_Body =>
null;
when Iir_Kind_Context_Declaration =>
null;
when others =>
Error_Kind ("add_design_unit", Lib_Unit);
end case;
-- Add it in the table, after the dependencies.
Design_Units.Append (Unit);
Set_Configuration_Done_Flag (Unit, True);
-- Restore now the file dependence.
-- Indeed, we may add a package body when we are in a package
-- declaration. However, the later does not depend on the former.
-- The file which depends on the package declaration also depends on
-- the package body.
if Flag_Build_File_Dependence then
Current_File_Dependence := Prev_File_Dependence;
end if;
if Get_Kind (Lib_Unit) = Iir_Kind_Package_Declaration then
-- Add body (if any).
declare
Bod : Iir_Design_Unit;
begin
Bod := Libraries.Find_Secondary_Unit (Unit, Null_Identifier);
if Get_Need_Body (Lib_Unit) then
if not Flags.Flag_Elaborate_With_Outdated then
-- LIB_UNIT requires a body.
if Bod = Null_Iir then
Error_Msg_Elab ("body of " & Disp_Node (Lib_Unit)
& " was never analyzed", Lib_Unit);
elsif Get_Date (Bod) < Get_Date (Unit) then
Error_Msg_Elab (Disp_Node (Bod) & " is outdated");
Bod := Null_Iir;
end if;
end if;
else
if Bod /= Null_Iir
and then Get_Date (Bod) < Get_Date (Unit)
then
-- There is a body for LIB_UNIT (which doesn't
-- require it) but it is outdated.
Bod := Null_Iir;
end if;
end if;
if Bod /= Null_Iir then
Set_Package (Get_Library_Unit (Bod), Lib_Unit);
Add_Design_Unit (Bod, Unit);
end if;
end;
end if;
end Add_Design_Unit;
procedure Add_Design_Concurrent_Stmts (Parent : Iir)
is
Stmt : Iir;
begin
Stmt := Get_Concurrent_Statement_Chain (Parent);
while Stmt /= Null_Iir loop
case Get_Kind (Stmt) is
when Iir_Kind_Component_Instantiation_Statement =>
if Is_Entity_Instantiation (Stmt) then
-- Entity or configuration instantiation.
Add_Design_Aspect (Get_Instantiated_Unit (Stmt), True);
end if;
when Iir_Kind_Block_Statement =>
Add_Design_Concurrent_Stmts (Stmt);
when Iir_Kind_For_Generate_Statement =>
Add_Design_Concurrent_Stmts
(Get_Generate_Statement_Body (Stmt));
when Iir_Kind_If_Generate_Statement =>
declare
Clause : Iir;
begin
Clause := Stmt;
while Clause /= Null_Iir loop
Add_Design_Concurrent_Stmts
(Get_Generate_Statement_Body (Clause));
Clause := Get_Generate_Else_Clause (Clause);
end loop;
end;
when Iir_Kind_Case_Generate_Statement =>
declare
Alt : Iir;
begin
Alt := Get_Case_Statement_Alternative_Chain (Stmt);
while Alt /= Null_Iir loop
if not Get_Same_Alternative_Flag (Alt) then
Add_Design_Concurrent_Stmts
(Get_Associated_Block (Alt));
end if;
Alt := Get_Chain (Alt);
end loop;
end;
when Iir_Kind_Process_Statement
| Iir_Kind_Sensitized_Process_Statement
| Iir_Kind_Psl_Assert_Statement
| Iir_Kind_Psl_Cover_Statement
| Iir_Kind_Psl_Default_Clock
| Iir_Kind_Psl_Declaration
| Iir_Kind_Psl_Endpoint_Declaration
| Iir_Kind_Simple_Simultaneous_Statement =>
null;
when others =>
Error_Kind ("add_design_concurrent_stmts(2)", Stmt);
end case;
Stmt := Get_Chain (Stmt);
end loop;
end Add_Design_Concurrent_Stmts;
procedure Add_Design_Aspect (Aspect : Iir; Add_Default : Boolean)
is
use Libraries;
Entity : Iir;
Arch : Iir;
Config : Iir;
Id : Name_Id;
Entity_Lib : Iir;
begin
if Aspect = Null_Iir then
return;
end if;
case Get_Kind (Aspect) is
when Iir_Kind_Entity_Aspect_Entity =>
-- Add the entity.
Entity_Lib := Get_Entity (Aspect);
Entity := Get_Design_Unit (Entity_Lib);
Add_Design_Unit (Entity, Aspect);
-- Extract and add the architecture.
Arch := Get_Architecture (Aspect);
if Arch /= Null_Iir then
case Get_Kind (Arch) is
when Iir_Kind_Simple_Name =>
Id := Get_Identifier (Arch);
Arch := Load_Secondary_Unit (Entity, Id, Aspect);
if Arch = Null_Iir then
Error_Msg_Elab
("cannot find architecture " & Name_Table.Image (Id)
& " of " & Disp_Node (Entity_Lib));
return;
else
Set_Architecture (Aspect, Get_Library_Unit (Arch));
end if;
when Iir_Kind_Architecture_Body =>
Arch := Get_Design_Unit (Arch);
when others =>
Error_Kind ("add_design_aspect", Arch);
end case;
else
Arch := Get_Latest_Architecture (Entity_Lib);
if Arch = Null_Iir then
Error_Msg_Elab ("no architecture in library for "
& Disp_Node (Entity_Lib), Aspect);
return;
end if;
Arch := Get_Design_Unit (Arch);
end if;
Load_Design_Unit (Arch, Aspect);
-- Add the default configuration if required. Must be done
-- before the architecture in case of recursive instantiation:
-- the configuration depends on the architecture.
if Add_Default then
Config := Get_Default_Configuration_Declaration
(Get_Library_Unit (Arch));
if Config /= Null_Iir then
if Get_Configuration_Mark_Flag (Config)
and then not Get_Configuration_Done_Flag (Config)
then
-- Recursive instantiation.
return;
else
Add_Design_Unit (Config, Aspect);
end if;
end if;
end if;
-- Otherwise, simply the architecture.
Add_Design_Unit (Arch, Aspect);
when Iir_Kind_Entity_Aspect_Configuration =>
Add_Design_Unit
(Get_Design_Unit (Get_Configuration (Aspect)), Aspect);
when Iir_Kind_Entity_Aspect_Open =>
null;
when others =>
Error_Kind ("add_design_aspect", Aspect);
end case;
end Add_Design_Aspect;
-- Return TRUE is PORT must not be open, and emit an error message only if
-- LOC is not NULL_IIR.
function Check_Open_Port (Port : Iir; Loc : Iir) return Boolean is
begin
case Get_Mode (Port) is
when Iir_In_Mode =>
-- LRM 1.1.1.2 Ports
-- A port of mode IN may be unconnected or unassociated only if
-- its declaration includes a default expression.
if Get_Default_Value (Port) = Null_Iir then
if Loc /= Null_Iir then
Error_Msg_Elab
("IN " & Disp_Node (Port) & " must be connected", Loc);
end if;
return True;
end if;
when Iir_Out_Mode
| Iir_Inout_Mode
| Iir_Buffer_Mode
| Iir_Linkage_Mode =>
-- LRM 1.1.1.2 Ports
-- A port of any mode other than IN may be unconnected or
-- unassociated as long as its type is not an unconstrained array
-- type.
if Get_Kind (Get_Type (Port)) in Iir_Kinds_Array_Type_Definition
and then (Get_Constraint_State (Get_Type (Port))
/= Fully_Constrained)
then
if Loc /= Null_Iir then
Error_Msg_Elab ("unconstrained " & Disp_Node (Port)
& " must be connected", Loc);
end if;
return True;
end if;
when others =>
Error_Kind ("check_open_port", Port);
end case;
return False;
end Check_Open_Port;
procedure Check_Binding_Indication (Conf : Iir)
is
Assoc : Iir;
Conf_Chain : Iir;
Inst_Chain : Iir;
Bind : Iir_Binding_Indication;
Err : Boolean;
Inst : Iir;
Inst_List : Iir_List;
Formal : Iir;
Assoc_1 : Iir;
Actual : Iir;
begin
Bind := Get_Binding_Indication (Conf);
Conf_Chain := Get_Port_Map_Aspect_Chain (Bind);
Err := False;
-- Note: the assoc chain is already canonicalized.
-- First pass: check for open associations in configuration.
Assoc := Conf_Chain;
while Assoc /= Null_Iir loop
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
Formal := Get_Association_Interface (Assoc);
Err := Err or Check_Open_Port (Formal, Assoc);
if Is_Warning_Enabled (Warnid_Binding)
and then not Get_Artificial_Flag (Assoc)
then
Warning_Msg_Elab
(Disp_Node (Formal) & " of " & Disp_Node (Get_Parent (Formal))
& " is not bound", Assoc, Warnid_Binding);
Warning_Msg_Elab
("(in " & Disp_Node (Current_Configuration) & ")",
Current_Configuration, Warnid_Binding);
end if;
end if;
Assoc := Get_Chain (Assoc);
end loop;
if Err then
return;
end if;
-- Second pass: check for port connected to open in instantiation.
Inst_List := Get_Instantiation_List (Conf);
for I in Natural loop
Inst := Get_Nth_Element (Inst_List, I);
exit when Inst = Null_Iir;
Inst := Get_Named_Entity (Inst);
Err := False;
-- Mark component ports not associated.
Inst_Chain := Get_Port_Map_Aspect_Chain (Inst);
Assoc := Inst_Chain;
while Assoc /= Null_Iir loop
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
Formal := Get_Association_Interface (Assoc);
Set_Open_Flag (Formal, True);
Err := True;
end if;
Assoc := Get_Chain (Assoc);
end loop;
-- If there is any component port open, search them in the
-- configuration.
if Err then
Assoc := Conf_Chain;
while Assoc /= Null_Iir loop
Formal := Get_Association_Interface (Assoc);
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
Actual := Null_Iir;
else
Actual := Get_Actual (Assoc);
Actual := Name_To_Object (Actual);
if Actual /= Null_Iir then
Actual := Get_Object_Prefix (Actual);
end if;
end if;
if Actual /= Null_Iir
and then Get_Open_Flag (Actual)
and then Check_Open_Port (Formal, Null_Iir)
then
-- For a better message, find the location.
Assoc_1 := Inst_Chain;
while Assoc_1 /= Null_Iir loop
if Get_Kind (Assoc_1) = Iir_Kind_Association_Element_Open
and then Actual = Get_Association_Interface (Assoc_1)
then
Err := Check_Open_Port (Formal, Assoc_1);
exit;
end if;
Assoc_1 := Get_Chain (Assoc_1);
end loop;
end if;
Assoc := Get_Chain (Assoc);
end loop;
-- Clear open flag.
Assoc := Inst_Chain;
while Assoc /= Null_Iir loop
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
Formal := Get_Association_Interface (Assoc);
Set_Open_Flag (Formal, False);
end if;
Assoc := Get_Chain (Assoc);
end loop;
end if;
end loop;
end Check_Binding_Indication;
-- CONF is either a configuration specification or a component
-- configuration.
-- If ADD_DEFAULT is true, then the default configuration for the design
-- binding must be added if required.
procedure Add_Design_Binding_Indication (Conf : Iir; Add_Default : Boolean)
is
Bind : constant Iir_Binding_Indication := Get_Binding_Indication (Conf);
Inst : Iir;
begin
if Bind = Null_Iir then
if Is_Warning_Enabled (Warnid_Binding) then
Inst := Get_First_Element (Get_Instantiation_List (Conf));
Warning_Msg_Elab
(Disp_Node (Inst) & " is not bound", Conf, Warnid_Binding);
Warning_Msg_Elab
("(in " & Disp_Node (Current_Configuration) & ")",
Current_Configuration, Warnid_Binding);
end if;
return;
end if;
Check_Binding_Indication (Conf);
Add_Design_Aspect (Get_Entity_Aspect (Bind), Add_Default);
end Add_Design_Binding_Indication;
procedure Add_Design_Block_Configuration (Blk : Iir_Block_Configuration)
is
Item : Iir;
Sub_Config : Iir;
begin
if Blk = Null_Iir then
return;
end if;
Item := Get_Configuration_Item_Chain (Blk);
while Item /= Null_Iir loop
case Get_Kind (Item) is
when Iir_Kind_Configuration_Specification =>
Add_Design_Binding_Indication (Item, True);
when Iir_Kind_Component_Configuration =>
Sub_Config := Get_Block_Configuration (Item);
Add_Design_Binding_Indication (Item, Sub_Config = Null_Iir);
Add_Design_Block_Configuration (Sub_Config);
when Iir_Kind_Block_Configuration =>
Add_Design_Block_Configuration (Item);
when others =>
Error_Kind ("add_design_block_configuration", Item);
end case;
Item := Get_Chain (Item);
end loop;
end Add_Design_Block_Configuration;
-- elaboration of a design hierarchy:
-- creates a list of design unit.
--
-- find top configuration (may be a default one), add it to the list.
-- For each element of the list:
-- add direct dependences (packages, entity, arch) if not in the list
-- for architectures and configuration: find instantiations and add
-- corresponding configurations.
--
-- Return the configuration declaration for the design.
function Configure (Primary_Id : Name_Id; Secondary_Id : Name_Id)
return Iir
is
use Libraries;
Unit : Iir_Design_Unit;
Lib_Unit : Iir;
Top : Iir;
begin
Unit := Find_Primary_Unit (Work_Library, Primary_Id);
if Unit = Null_Iir then
Error_Msg_Elab ("cannot find entity or configuration "
& Name_Table.Image (Primary_Id));
return Null_Iir;
end if;
Lib_Unit := Get_Library_Unit (Unit);
case Get_Kind (Lib_Unit) is
when Iir_Kind_Entity_Declaration =>
-- Use WORK as location (should use a command line location ?)
Load_Design_Unit (Unit, Work_Library);
Lib_Unit := Get_Library_Unit (Unit);
if Secondary_Id /= Null_Identifier then
Unit := Find_Secondary_Unit (Unit, Secondary_Id);
if Unit = Null_Iir then
Error_Msg_Elab
("cannot find architecture "
& Name_Table.Image (Secondary_Id)
& " of " & Disp_Node (Lib_Unit));
return Null_Iir;
end if;
else
declare
Arch_Unit : Iir_Architecture_Body;
begin
Arch_Unit := Get_Latest_Architecture (Lib_Unit);
if Arch_Unit = Null_Iir then
Error_Msg_Elab
(Disp_Node (Lib_Unit)
& " has no architecture in library "
& Name_Table.Image (Get_Identifier (Work_Library)));
return Null_Iir;
end if;
Unit := Get_Design_Unit (Arch_Unit);
end;
end if;
Load_Design_Unit (Unit, Lib_Unit);
if Nbr_Errors /= 0 then
return Null_Iir;
end if;
Lib_Unit := Get_Library_Unit (Unit);
Top := Get_Default_Configuration_Declaration (Lib_Unit);
if Top = Null_Iir then
-- No default configuration for this architecture.
raise Internal_Error;
end if;
when Iir_Kind_Configuration_Declaration =>
Top := Unit;
when others =>
Error_Msg_Elab (Name_Table.Image (Primary_Id)
& " is neither an entity nor a configuration");
return Null_Iir;
end case;
Set_Configuration_Mark_Flag (Std_Package.Std_Standard_Unit, True);
Set_Configuration_Done_Flag (Std_Package.Std_Standard_Unit, True);
Add_Design_Unit (Top, Null_Iir);
return Top;
end Configure;
function Configure (Primary : String; Secondary : String) return Iir
is
Primary_Id : Name_Id;
Secondary_Id : Name_Id;
begin
Primary_Id := Get_Identifier (Primary);
if Secondary /= "" then
Secondary_Id := Get_Identifier (Secondary);
else
Secondary_Id := Null_Identifier;
end if;
return Configure (Primary_Id, Secondary_Id);
end Configure;
procedure Check_Entity_Declaration_Top (Entity : Iir_Entity_Declaration)
is
Has_Error : Boolean := False;
-- Return TRUE if GRT supports override of generic GEN.
function Allow_Generic_Override (Gen : Iir) return Boolean
is
Gen_Type : constant Iir := Get_Type (Gen);
begin
case Get_Kind (Gen_Type) is
when Iir_Kind_Integer_Type_Definition
| Iir_Kind_Integer_Subtype_Definition
| Iir_Kind_Enumeration_Type_Definition
| Iir_Kind_Enumeration_Subtype_Definition =>
return True;
when Iir_Kind_Array_Type_Definition
| Iir_Kind_Array_Subtype_Definition =>
-- Only one-dimensional arrays of enumeration are allowed.
-- If unconstrained, the index must be of integer type.
if Get_Kind (Get_Base_Type (Get_Element_Subtype (Gen_Type)))
/= Iir_Kind_Enumeration_Type_Definition
then
-- Not an array of enumeration type.
return False;
end if;
declare
Indexes : constant Iir_List :=
Get_Index_Subtype_List (Gen_Type);
begin
if Get_Nbr_Elements (Indexes) /= 1 then
-- Not a one-dimensional array.
return False;
end if;
if Get_Constraint_State (Gen_Type) /= Fully_Constrained
and then (Get_Kind (Get_Index_Type (Indexes, 0))
/= Iir_Kind_Integer_Subtype_Definition)
then
-- Index not constrained or not of integer subtype.
return False;
end if;
end;
return True;
when others =>
return False;
end case;
end Allow_Generic_Override;
procedure Error (Msg : String; Loc : Iir) is
begin
if not Has_Error then
Error_Msg_Elab
(Disp_Node (Entity) & " cannot be at the top of a design");
Has_Error := True;
end if;
Error_Msg_Elab (Msg, Loc);
end Error;
El : Iir;
begin
-- Check generics.
El := Get_Generic_Chain (Entity);
while El /= Null_Iir loop
if Get_Default_Value (El) = Null_Iir then
if not Allow_Generic_Override (El) then
Error ("(" & Disp_Node (El) & " has no default value)", El);
end if;
end if;
El := Get_Chain (El);
end loop;
-- Check port.
El := Get_Port_Chain (Entity);
while El /= Null_Iir loop
if not Is_Fully_Constrained_Type (Get_Type (El))
and then Get_Default_Value (El) = Null_Iir
then
Error ("(" & Disp_Node (El)
& " is unconstrained and has no default value)", El);
end if;
El := Get_Chain (El);
end loop;
end Check_Entity_Declaration_Top;
end Configuration;
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