Add IAR MSP430 port layer.

Source/portable/IAR/MSP430/portasm.h

@@ -0,0 +1,106 @@
+/*
+	FreeRTOS.org V5.1.0 - Copyright (C) 2003-2008 Richard Barry.
+
+	This file is part of the FreeRTOS.org distribution.
+
+	FreeRTOS.org 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 of the License, or
+	(at your option) any later version.
+
+	FreeRTOS.org 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 FreeRTOS.org; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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+	a combined work that includes FreeRTOS.org, without being obliged to provide
+	the source code for any proprietary components.  See the licensing section
+	of http://www.FreeRTOS.org for full details of how and when the exception
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+
+    ***************************************************************************
+    ***************************************************************************
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+    ***************************************************************************
+
+	Please ensure to read the configuration and relevant port sections of the
+	online documentation.
+
+	http://www.FreeRTOS.org - Documentation, latest information, license and
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+
+	http://www.SafeRTOS.com - A version that is certified for use in safety
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+*/
+
+#ifndef PORTASM_H
+#define PORTASM_H
+
+portSAVE_CONTEXT macro
+
+		IMPORT pxCurrentTCB
+		IMPORT usCriticalNesting
+
+		/* Save the remaining registers. */
+		push	r4
+		push	r5
+		push	r6
+		push	r7
+		push	r8
+		push	r9
+		push	r10
+		push	r11
+		push	r12
+		push	r13
+		push	r14
+		push	r15
+		mov.w	&usCriticalNesting, r14
+		push	r14
+		mov.w	&pxCurrentTCB, r12
+		mov.w	r1, 0(r12)
+		endm
+/*-----------------------------------------------------------*/
+		
+portRESTORE_CONTEXT macro
+		mov.w	&pxCurrentTCB, r12
+		mov.w	@r12, r1
+		pop		r15
+		mov.w	r15, &usCriticalNesting
+		pop		r15
+		pop		r14
+		pop		r13
+		pop		r12
+		pop		r11
+		pop		r10
+		pop		r9
+		pop		r8
+		pop		r7
+		pop		r6
+		pop		r5
+		pop		r4
+
+		/* The last thing on the stack will be the status register.
+        Ensure the power down bits are clear ready for the next
+        time this power down register is popped from the stack. */
+		bic.w   #0xf0,0(SP)
+
+		reti
+		endm
+/*-----------------------------------------------------------*/
+
+#endif
+