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Convert the CCS4 MSP430X port layer to permit large and small data models, and large and small code models.
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Richard Barry
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commit
9a24d4a37f
79
Source/portable/CCS4/MSP430X/data_model.h
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79
Source/portable/CCS4/MSP430X/data_model.h
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@ -0,0 +1,79 @@
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; FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
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;
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; ***************************************************************************
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; * *
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; * If you are: *
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; * *
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; * + New to FreeRTOS, *
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; * + Wanting to learn FreeRTOS or multitasking in general quickly *
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; * + Looking for basic training, *
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; * + Wanting to improve your FreeRTOS skills and productivity *
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; * *
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; * then take a look at the FreeRTOS books - available as PDF or paperback *
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; * *
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; * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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; * http://www.FreeRTOS.org/Documentation *
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; * *
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; * A pdf reference manual is also available. Both are usually delivered *
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; * to your inbox within 20 minutes to two hours when purchased between 8am *
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; * and 8pm GMT (although please allow up to 24 hours in case of *
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; * exceptional circumstances). Thank you for your support! *
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; * *
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; ***************************************************************************
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;
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; This file is part of the FreeRTOS distribution.
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;
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; FreeRTOS is free software; you can redistribute it and/or modify it under
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; the terms of the GNU General Public License (version 2) as published by the
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; Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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; ***NOTE*** The exception to the GPL is included to allow you to distribute
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; a combined work that includes FreeRTOS without being obliged to provide the
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; source code for proprietary components outside of the FreeRTOS kernel.
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; FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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; more details. You should have received a copy of the GNU General Public
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; License and the FreeRTOS license exception along with FreeRTOS; if not it
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; can be viewed here: http://www.freertos.org/a00114.html and also obtained
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; by writing to Richard Barry, contact details for whom are available on the
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; FreeRTOS WEB site.
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;
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; 1 tab == 4 spaces!
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;
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; http://www.FreeRTOS.org - Documentation, latest information, license and
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; contact details.
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;
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; http://www.SafeRTOS.com - A version that is certified for use in safety
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; critical systems.
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;
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; http://www.OpenRTOS.com - Commercial support, development, porting,
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; licensing and training services.
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.if $DEFINED( __LARGE_DATA_MODEL__ )
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.define "pushm.a", pushm_x
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.define "popm.a", popm_x
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.define "push.a", push_x
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.define "pop.a", pop_x
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.define "mov.a", mov_x
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.define "cmp.a", cmp_x
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.else
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.define "pushm.w", pushm_x
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.define "popm.w", popm_x
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.define "push.w", push_x
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.define "pop.w", pop_x
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.define "mov.w", mov_x
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.define "cmp.w", cmp_x
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.endif
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.if $DEFINED( __LARGE_CODE_MODEL__ )
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.define "calla", call_x
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.define "reta", ret_x
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.else
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.define "call", call_x
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.define "ret", ret_x
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.endif
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@ -98,6 +98,7 @@ void vPortSetupTimerInterrupt( void );
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portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
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{
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unsigned short *pusTopOfStack;
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unsigned long *pulTopOfStack;
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/*
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Place a few bytes of known values on the bottom of the stack.
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@ -111,38 +112,61 @@ unsigned short *pusTopOfStack;
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pxTopOfStack--;
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*/
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*pxTopOfStack = ( portSTACK_TYPE ) pxCode;
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/* Data types are need either 16 bits or 32 bits depending on the data
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and code model used. */
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if( sizeof( pxCode ) == sizeof( unsigned short ) )
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{
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pusTopOfStack = ( unsigned short * ) pxTopOfStack;
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*pusTopOfStack = ( unsigned short ) pxCode;
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}
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else
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{
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/* Make room for a 20 bit value stored as a 32 bit value. */
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pusTopOfStack = ( unsigned short * ) pxTopOfStack;
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pusTopOfStack--;
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pulTopOfStack = ( unsigned long * ) pusTopOfStack;
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*pulTopOfStack = ( unsigned long ) pxCode;
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pusTopOfStack = ( unsigned short * ) pulTopOfStack;
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}
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pusTopOfStack--;
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*pusTopOfStack = portFLAGS_INT_ENABLED;
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pusTopOfStack -= 2;
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pusTopOfStack -= ( sizeof( portSTACK_TYPE ) / 2 );
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/* From here on the size of stacked items depends on the memory model. */
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pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack;
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/* Next the general purpose registers. */
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*pxTopOfStack = ( portSTACK_TYPE ) 0xffffff;
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#ifdef PRELOAD_REGISTER_VALUES
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*pxTopOfStack = ( portSTACK_TYPE ) 0xffff;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xeeeeee;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xeeee;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xdddddd;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xdddd;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbbbb;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbb;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaaaa;
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*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaa;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x999999;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x9999;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x888888;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x8888;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x555555;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x5555;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x666666;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x6666;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x555555;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x5555;
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pxTopOfStack--;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x444444;
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*pxTopOfStack = ( portSTACK_TYPE ) 0x4444;
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pxTopOfStack--;
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#else
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pxTopOfStack -= 3;
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*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
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pxTopOfStack -= 9;
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#endif
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/* A variable is used to keep track of the critical section nesting.
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This variable has to be stored as part of the task context and is
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@ -53,6 +53,8 @@
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; * The definition of the "register test" tasks, as described at the top of
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; * main.c
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.include data_model.h
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.global vTaskIncrementTick
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.global vTaskSwitchContext
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.global vPortSetupTimerInterrupt
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@ -69,21 +71,21 @@
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portSAVE_CONTEXT .macro
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;Save the remaining registers.
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pushm.a #12, r15
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movx.w &usCriticalNesting, r14
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pushx.a r14
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movx.a &pxCurrentTCB, r12
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movx.a sp, 0( r12 )
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pushm_x #12, r15
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mov.w &usCriticalNesting, r14
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push_x r14
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mov_x &pxCurrentTCB, r12
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mov_x sp, 0( r12 )
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.endm
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;-----------------------------------------------------------
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portRESTORE_CONTEXT .macro
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movx.a &pxCurrentTCB, r12
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movx.a @r12, sp
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popx.a r15
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movx.w r15, &usCriticalNesting
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popm.a #12, r15
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mov_x &pxCurrentTCB, r12
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mov_x @r12, sp
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pop_x r15
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mov.w r15, &usCriticalNesting
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popm_x #12, r15
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;The last thing on the stack will be the status register.
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;Ensure the power down bits are clear ready for the next
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@ -91,7 +93,7 @@ portRESTORE_CONTEXT .macro
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bic.w #0xf0, 0( sp )
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pop.w sr
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reta
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ret_x
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.endm
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;-----------------------------------------------------------
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@ -113,8 +115,8 @@ vPortPreemptiveTickISR:
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push.w sr
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portSAVE_CONTEXT
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calla #vTaskIncrementTick
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calla #vTaskSwitchContext
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call_x #vTaskIncrementTick
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call_x #vTaskSwitchContext
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portRESTORE_CONTEXT
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;-----------------------------------------------------------
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@ -126,7 +128,7 @@ vPortCooperativeTickISR:
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push.w sr
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portSAVE_CONTEXT
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calla #vTaskIncrementTick
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call_x #vTaskIncrementTick
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portRESTORE_CONTEXT
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;-----------------------------------------------------------
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@ -147,7 +149,7 @@ vPortYield:
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portSAVE_CONTEXT
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; Select the next task to run.
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calla #vTaskSwitchContext
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call_x #vTaskSwitchContext
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; Restore the context of the new task.
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portRESTORE_CONTEXT
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@ -162,7 +164,7 @@ xPortStartScheduler:
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; Setup the hardware to generate the tick. Interrupts are disabled
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; when this function is called.
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calla #vPortSetupTimerInterrupt
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call_x #vPortSetupTimerInterrupt
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; Restore the context of the first task that is going to run.
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portRESTORE_CONTEXT
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@ -73,9 +73,15 @@
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#define portDOUBLE double
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#define portLONG long
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#define portSHORT int
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#define portSTACK_TYPE unsigned portLONG
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#define portBASE_TYPE portSHORT
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/* The stack type changes depending on the data model. */
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#ifdef __LARGE_DATA_MODEL__
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#define portSTACK_TYPE unsigned long
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#else
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#define portSTACK_TYPE unsigned short
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#endif
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#if( configUSE_16_BIT_TICKS == 1 )
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typedef unsigned portSHORT portTickType;
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#define portMAX_DELAY ( portTickType ) 0xffff
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