Diff: scmRTOS/CortexM3/OS_Target.h

Revision:

0:331db0b44b67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scmRTOS/CortexM3/OS_Target.h	Tue Sep 21 19:48:05 2010 +0000
@@ -0,0 +1,236 @@
+//******************************************************************************
+//*
+//*     FULLNAME:  Single-Chip Microcontroller Real-Time Operating System
+//*
+//*     NICKNAME:  scmRTOS
+//*
+//*     PROCESSOR: ARM Cortex-M3 
+//*
+//*     TOOLKIT:   RVCT (ARM)
+//*               
+//*     PURPOSE:   Target Dependent Stuff Header. Declarations And Definitions
+//*               
+//*     Version: 3.10
+//*
+//*     $Revision: 195 $
+//*     $Date:: 2008-06-19 #$
+//*
+//*     Copyright (c) 2003-2010, Harry E. Zhurov
+//*
+//*     Permission is hereby granted, free of charge, to any person 
+//*     obtaining  a copy of this software and associated documentation 
+//*     files (the "Software"), to deal in the Software without restriction, 
+//*     including without limitation the rights to use, copy, modify, merge, 
+//*     publish, distribute, sublicense, and/or sell copies of the Software, 
+//*     and to permit persons to whom the Software is furnished to do so, 
+//*     subject to the following conditions:
+//*
+//*     The above copyright notice and this permission notice shall be included 
+//*     in all copies or substantial portions of the Software.
+//*
+//*     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+//*     EXPRESS  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+//*     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//*     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
+//*     CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+//*     TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//*     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//*
+//*     =================================================================
+//*     See http://scmrtos.sourceforge.net for documentation, latest
+//*     information, license and contact details.
+//*     =================================================================
+//*
+//******************************************************************************
+//*     Ported by Andrey Chuikin, Copyright (c) 2008-2010
+
+#ifndef scmRTOS_CORTEXM3_H
+#define scmRTOS_CORTEXM3_H
+
+#include <commdefs.h>
+
+//------------------------------------------------------------------------------
+//
+//    Compiler and Target checks
+//
+//
+#ifndef __ARMCC_VERSION
+#error "This file should only be compiled with ARM RVCT Compiler"
+#endif // __ARMCC_VERSION
+
+#if __TARGET_ARCH_ARM != 0 || __TARGET_ARCH_THUMB != 4
+#error "This file must be compiled for ARMv7-M (Cortex-M3) processor only."
+#endif
+
+//------------------------------------------------------------------------------
+//
+//    Target specific types
+//
+//
+typedef dword TStackItem;
+typedef dword TStatusReg;
+
+//-----------------------------------------------------------------------------
+//
+//    Configuration macros
+//
+//
+#define OS_PROCESS    __attribute__((__noreturn__))
+#define OS_INTERRUPT 
+#define DUMMY_INSTR() __NOP()
+#define INLINE_PROCESS_CTOR INLINE inline
+
+//-----------------------------------------------------------------------------
+//
+//   Uncomment macro value below for SystemTimer() run in critical section
+// 
+//   This is useful (and necessary) when target processor has hardware 
+//   enabled nested interrups. Cortex-M3 have such interrupts.
+// 
+#define SYS_TIMER_CRIT_SECT()  TCritSect cs
+
+//-----------------------------------------------------------------------------
+// Separate return stack not required
+#define SEPARATE_RETURN_STACK   0
+
+//-----------------------------------------------------------------------------
+// Software interrupt stack switching not supported in Cortex-M3 port
+// because processor implements hardware stack switching.
+// So, system timer isr wrapper can't be choosen at project level
+//
+#define scmRTOS_ISRW_TYPE       TISRW
+
+//-----------------------------------------------------------------------------
+//
+//    scmRTOS Context Switch Scheme
+//
+//    The macro defines a context switch manner. Value 0 sets direct context
+//    switch in the scheduler and in the OS ISRs. This is the primary method.
+//    Value 1 sets the second way to switch context - by using of software 
+//    interrupt. See documentation fo details.
+//    Cortex-M3 port supports software interrupt switch method only.
+//
+#define  scmRTOS_CONTEXT_SWITCH_SCHEME 1
+
+//-----------------------------------------------------------------------------
+//
+//     Include project-level configurations
+//    !!! The order of includes is important !!!
+//
+#include "../../scmRTOS_config.h"
+#include "../scmRTOS_TARGET_CFG.h"
+#include <scmRTOS_defs.h>
+#include <LPC17xx.h>
+
+//-----------------------------------------------------------------------------
+//
+//     The Critital Section Wrapper
+//
+//
+#define __enable_interrupt()  __enable_irq()
+#define __disable_interrupt() __disable_irq()
+
+#define __set_interrupt_state(status) __set_PRIMASK(status)
+#define __get_interrupt_state() __get_PRIMASK()
+
+class TCritSect
+{
+public:
+    TCritSect () : StatusReg(__get_interrupt_state()) { __disable_interrupt(); }
+    ~TCritSect() { __set_interrupt_state(StatusReg); }
+
+private:
+    TStatusReg StatusReg;
+};
+//-----------------------------------------------------------------------------
+
+//-----------------------------------------------------------------------------
+//
+//     Priority stuff
+//
+//
+namespace OS
+{
+INLINE inline OS::TProcessMap GetPrioTag(const byte pr) { return static_cast<OS::TProcessMap> (1 << pr); }
+
+#if scmRTOS_PRIORITY_ORDER == 0
+    INLINE inline byte GetHighPriority(TProcessMap pm)
+    {
+        byte pr = 0;
+
+        while( !(pm & 0x0001) )
+        {
+            pr++;
+            pm >>= 1;
+        }
+        return pr;
+    }
+#else
+    INLINE inline byte GetHighPriority(TProcessMap pm) { return (31 - __clz(pm)); }
+#endif // scmRTOS_PRIORITY_ORDER
+}
+
+//-----------------------------------------------------------------------------
+//
+//     Interrupt and Interrupt Service Routines support
+//
+INLINE inline TStatusReg GetInterruptState( )             { return __get_interrupt_state(); }
+INLINE inline void       SetInterruptState(TStatusReg sr) { __set_interrupt_state(sr);      }
+
+INLINE inline void EnableInterrupts()  { __enable_interrupt();  }
+INLINE inline void DisableInterrupts() { __disable_interrupt(); }
+
+
+namespace OS
+{
+    INLINE inline void EnableContextSwitch()  { EnableInterrupts(); }
+    INLINE inline void DisableContextSwitch() { DisableInterrupts(); }
+}
+
+#include <OS_Kernel.h>
+
+namespace OS
+{
+    //--------------------------------------------------------------------------
+    //
+    //      NAME       :   OS ISR support 
+    //
+    //      PURPOSE    :   Implements common actions on interrupt enter and exit 
+    //                     under the OS
+    //
+    //      DESCRIPTION:
+    //
+    //
+    class TISRW
+    {
+    public:
+        INLINE  TISRW()  { ISR_Enter(); }
+        INLINE  ~TISRW() { ISR_Exit();  }
+
+    private:
+        //-----------------------------------------------------
+        INLINE void ISR_Enter()
+        {
+            TCritSect cs;
+            Kernel.ISR_NestCount++;
+        }
+        //-----------------------------------------------------
+        INLINE void ISR_Exit()
+        {
+            TCritSect cs;
+            if(--Kernel.ISR_NestCount) return;
+            Kernel.SchedISR();
+        }
+        //-----------------------------------------------------
+    };
+
+    // No software interrupt stack switching provided,
+    // TISRW_SS declared to be the same as TISRW for porting compability
+    #define TISRW_SS    TISRW
+    
+} // ns OS
+//-----------------------------------------------------------------------------
+
+#endif // scmRTOS_CORTEXM3_H
+//-----------------------------------------------------------------------------
+