------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- -- -- -- S Y S T E M . B B -- -- -- -- S p e c -- -- -- -- Copyright (C) 1999-2002 Universidad Politecnica de Madrid -- -- Copyright (C) 2003-2004 The European Space Agency -- -- Copyright (C) 2003-2011, AdaCore -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- -- -- -- -- -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- . -- -- -- -- GNARL was developed by the GNARL team at Florida State University. -- -- Extensive contributions were provided by Ada Core Technologies, Inc. -- -- -- -- The port of GNARL to bare board targets was initially developed by the -- -- Real-Time Systems Group at the Technical University of Madrid. -- -- -- ------------------------------------------------------------------------------ -- This is the root package of the bare board implementation of the low level -- tasking support for Ravenscar compliant run times. pragma Restrictions (No_Elaboration_Code); -- Ensure no elaboration code to avoid possible elaboration circularities package System.BB is pragma Pure; -- All of the package specifications in the System.BB hierarchy are system -- independent with the exception of the Parameters package which specifies -- values of constants describing facts about a given system/architecture, -- such as number of interrupt levels or trap vectors. Each box represents -- a package specification, with directly below it the main subprograms -- provided. Lines indicate a dependency of the upper spec on the lower -- one. In addition to the packages listed here, specific ports may define -- specifications for functionality unique to each platform, or to factor -- out common definitions needed in the implementation. -- Most ports will need just two system-specific implementation bodies: -- * s-bbcppr.adb: CPU_Primitives body for each CPU architecture -- * s-bbbosu.adb: Board_Support body for each supported board -- .----------------------------------------------------------. -- | S Y S T E M . O S _ I N T E R F A C E | -- '----------------------------------------------------------' -- | | | | -- | | .-------------------. | | -- | | | BB.Threads.Queues | | | -- | | '-------------------' | | -- | | Insert | | -- | | Extract | | -- | | Change_Priority | | -- | | | | | -- | .------------------. .----------------. | -- | | BB.Board_Support | | BB.Threads | | -- | '------------------' '----------------' | -- | Initialize_Board Thread_Self | -- | Set_Alarm Set_Priority | -- | Read_Clock Get_Priority | -- | Get_Interrupt_Request Sleep/Wakeup | -- | | | | | | | -- .---------------. | .-------------------. .-------------. -- | BB.Interrupts | | | BB.CPU_Primitives | | BB.Time | -- '---------------' | '-------------------' '-------------' -- Attach_Handler | Context_Switch Clock -- Current_Interrupt | Get_Context Delay_Until -- | | Set_Context -- | | Install_Handler -- | | Disable_Interrupts -- | | Enable_Interrupts -- | | | -- .-------------------. .---------------. -- | BB.Parameters |-. | BB.Protection | -- '-------------------' |-. '---------------' -- '-------------------' | Enter_Kernel -- '------------------' Leave_Kernel end System.BB;