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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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pull/4/head
Richard Barry 14 years ago
parent 2c894e0f55
commit 9a24d4a37f
4 changed files with 155 additions and 44 deletions
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79
Source/portable/CCS4/MSP430X/data_model.h
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@ -0,0 +1,79 @@
; FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
;
; ***************************************************************************
; * *
; * If you are: *
; * *
; * + New to FreeRTOS, *
; * + Wanting to learn FreeRTOS or multitasking in general quickly *
; * + Looking for basic training, *
; * + Wanting to improve your FreeRTOS skills and productivity *
; * *
; * then take a look at the FreeRTOS books - available as PDF or paperback *
; * *
; * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
; * http://www.FreeRTOS.org/Documentation *
; * *
; * A pdf reference manual is also available. Both are usually delivered *
; * to your inbox within 20 minutes to two hours when purchased between 8am *
; * and 8pm GMT (although please allow up to 24 hours in case of *
; * exceptional circumstances). Thank you for your support! *
; * *
; ***************************************************************************
;
; This file is part of the FreeRTOS distribution.
;
; FreeRTOS is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License (version 2) as published by the
; Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
; ***NOTE*** The exception to the GPL is included to allow you to distribute
; a combined work that includes FreeRTOS without being obliged to provide the
; source code for proprietary components outside of the FreeRTOS kernel.
; FreeRTOS 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 and the FreeRTOS license exception along with FreeRTOS; if not it
; can be viewed here: http://www.freertos.org/a00114.html and also obtained
; by writing to Richard Barry, contact details for whom are available on the
; FreeRTOS WEB site.
;
; 1 tab == 4 spaces!
;
; http://www.FreeRTOS.org - Documentation, latest information, license and
; contact details.
;
; http://www.SafeRTOS.com - A version that is certified for use in safety
; critical systems.
;
; http://www.OpenRTOS.com - Commercial support, development, porting,
; licensing and training services.
.if $DEFINED( __LARGE_DATA_MODEL__ )
.define "pushm.a", pushm_x
.define "popm.a", popm_x
.define "push.a", push_x
.define "pop.a", pop_x
.define "mov.a", mov_x
.define "cmp.a", cmp_x
.else
.define "pushm.w", pushm_x
.define "popm.w", popm_x
.define "push.w", push_x
.define "pop.w", pop_x
.define "mov.w", mov_x
.define "cmp.w", cmp_x
.endif
.if $DEFINED( __LARGE_CODE_MODEL__ )
.define "calla", call_x
.define "reta", ret_x
.else
.define "call", call_x
.define "ret", ret_x
.endif

78
Source/portable/CCS4/MSP430X/port.c
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@ -98,6 +98,7 @@ void vPortSetupTimerInterrupt( void );
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters ) portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{ {
unsigned short *pusTopOfStack; unsigned short *pusTopOfStack;
unsigned long *pulTopOfStack;
/* /*
Place a few bytes of known values on the bottom of the stack. Place a few bytes of known values on the bottom of the stack.
@ -111,38 +112,61 @@ unsigned short *pusTopOfStack;
pxTopOfStack--; pxTopOfStack--;
*/ */
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* Data types are need either 16 bits or 32 bits depending on the data
pusTopOfStack = ( unsigned short * ) pxTopOfStack; and code model used. */
if( sizeof( pxCode ) == sizeof( unsigned short ) )
{
pusTopOfStack = ( unsigned short * ) pxTopOfStack;
*pusTopOfStack = ( unsigned short ) pxCode;
}
else
{
/* Make room for a 20 bit value stored as a 32 bit value. */
pusTopOfStack = ( unsigned short * ) pxTopOfStack;
pusTopOfStack--;
pulTopOfStack = ( unsigned long * ) pusTopOfStack;
*pulTopOfStack = ( unsigned long ) pxCode;
pusTopOfStack = ( unsigned short * ) pulTopOfStack;
}
pusTopOfStack--; pusTopOfStack--;
*pusTopOfStack = portFLAGS_INT_ENABLED; *pusTopOfStack = portFLAGS_INT_ENABLED;
pusTopOfStack -= 2; pusTopOfStack -= ( sizeof( portSTACK_TYPE ) / 2 );
/* From here on the size of stacked items depends on the memory model. */
pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack; pxTopOfStack = ( portSTACK_TYPE * ) pusTopOfStack;
/* Next the general purpose registers. */ /* Next the general purpose registers. */
*pxTopOfStack = ( portSTACK_TYPE ) 0xffffff; #ifdef PRELOAD_REGISTER_VALUES
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0xffff;
*pxTopOfStack = ( portSTACK_TYPE ) 0xeeeeee; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0xeeee;
*pxTopOfStack = ( portSTACK_TYPE ) 0xdddddd; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0xdddd;
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
*pxTopOfStack = ( portSTACK_TYPE ) 0xbbbbbb; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0xbbbb;
*pxTopOfStack = ( portSTACK_TYPE ) 0xaaaaaa; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0xaaaa;
*pxTopOfStack = ( portSTACK_TYPE ) 0x999999; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0x9999;
*pxTopOfStack = ( portSTACK_TYPE ) 0x888888; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0x8888;
*pxTopOfStack = ( portSTACK_TYPE ) 0x555555; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0x5555;
*pxTopOfStack = ( portSTACK_TYPE ) 0x666666; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0x6666;
*pxTopOfStack = ( portSTACK_TYPE ) 0x555555; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0x5555;
*pxTopOfStack = ( portSTACK_TYPE ) 0x444444; pxTopOfStack--;
pxTopOfStack--; *pxTopOfStack = ( portSTACK_TYPE ) 0x4444;
pxTopOfStack--;
#else
pxTopOfStack -= 3;
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;
pxTopOfStack -= 9;
#endif
/* A variable is used to keep track of the critical section nesting. /* A variable is used to keep track of the critical section nesting.
This variable has to be stored as part of the task context and is This variable has to be stored as part of the task context and is

34
Source/portable/CCS4/MSP430X/portext.asm
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@ -53,6 +53,8 @@
; * The definition of the "register test" tasks, as described at the top of ; * The definition of the "register test" tasks, as described at the top of
; * main.c ; * main.c
.include data_model.h
.global vTaskIncrementTick .global vTaskIncrementTick
.global vTaskSwitchContext .global vTaskSwitchContext
.global vPortSetupTimerInterrupt .global vPortSetupTimerInterrupt
@ -69,21 +71,21 @@
portSAVE_CONTEXT .macro portSAVE_CONTEXT .macro
;Save the remaining registers. ;Save the remaining registers.
pushm.a #12, r15 pushm_x #12, r15
movx.w &usCriticalNesting, r14 mov.w &usCriticalNesting, r14
pushx.a r14 push_x r14
movx.a &pxCurrentTCB, r12 mov_x &pxCurrentTCB, r12
movx.a sp, 0( r12 ) mov_x sp, 0( r12 )
.endm .endm
;----------------------------------------------------------- ;-----------------------------------------------------------
portRESTORE_CONTEXT .macro portRESTORE_CONTEXT .macro
movx.a &pxCurrentTCB, r12 mov_x &pxCurrentTCB, r12
movx.a @r12, sp mov_x @r12, sp
popx.a r15 pop_x r15
movx.w r15, &usCriticalNesting mov.w r15, &usCriticalNesting
popm.a #12, r15 popm_x #12, r15
;The last thing on the stack will be the status register. ;The last thing on the stack will be the status register.
;Ensure the power down bits are clear ready for the next ;Ensure the power down bits are clear ready for the next
@ -91,7 +93,7 @@ portRESTORE_CONTEXT .macro
bic.w #0xf0, 0( sp ) bic.w #0xf0, 0( sp )
pop.w sr pop.w sr
reta ret_x
.endm .endm
;----------------------------------------------------------- ;-----------------------------------------------------------
@ -113,8 +115,8 @@ vPortPreemptiveTickISR:
push.w sr push.w sr
portSAVE_CONTEXT portSAVE_CONTEXT
calla #vTaskIncrementTick call_x #vTaskIncrementTick
calla #vTaskSwitchContext call_x #vTaskSwitchContext
portRESTORE_CONTEXT portRESTORE_CONTEXT
;----------------------------------------------------------- ;-----------------------------------------------------------
@ -126,7 +128,7 @@ vPortCooperativeTickISR:
push.w sr push.w sr
portSAVE_CONTEXT portSAVE_CONTEXT
calla #vTaskIncrementTick call_x #vTaskIncrementTick
portRESTORE_CONTEXT portRESTORE_CONTEXT
;----------------------------------------------------------- ;-----------------------------------------------------------
@ -147,7 +149,7 @@ vPortYield:
portSAVE_CONTEXT portSAVE_CONTEXT
; Select the next task to run. ; Select the next task to run.
calla #vTaskSwitchContext call_x #vTaskSwitchContext
; Restore the context of the new task. ; Restore the context of the new task.
portRESTORE_CONTEXT portRESTORE_CONTEXT
@ -162,7 +164,7 @@ xPortStartScheduler:
; Setup the hardware to generate the tick. Interrupts are disabled ; Setup the hardware to generate the tick. Interrupts are disabled
; when this function is called. ; when this function is called.
calla #vPortSetupTimerInterrupt call_x #vPortSetupTimerInterrupt
; Restore the context of the first task that is going to run. ; Restore the context of the first task that is going to run.
portRESTORE_CONTEXT portRESTORE_CONTEXT

8
Source/portable/CCS4/MSP430X/portmacro.h
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@ -73,9 +73,15 @@
#define portDOUBLE double #define portDOUBLE double
#define portLONG long #define portLONG long
#define portSHORT int #define portSHORT int
#define portSTACK_TYPE unsigned portLONG
#define portBASE_TYPE portSHORT #define portBASE_TYPE portSHORT
/* The stack type changes depending on the data model. */
#ifdef __LARGE_DATA_MODEL__
#define portSTACK_TYPE unsigned long
#else
#define portSTACK_TYPE unsigned short
#endif
#if( configUSE_16_BIT_TICKS == 1 ) #if( configUSE_16_BIT_TICKS == 1 )
typedef unsigned portSHORT portTickType; typedef unsigned portSHORT portTickType;
#define portMAX_DELAY ( portTickType ) 0xffff #define portMAX_DELAY ( portTickType ) 0xffff

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