Work in progress.
This commit is contained in:
Richard Barry
parent
c99f3c55cd
commit
68074c03d6
@ -51,15 +51,15 @@
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licensing and training services.
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*/
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the SH2A port.
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*----------------------------------------------------------*/
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/*-----------------------------------------------------------
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* Implementation of functions defined in portable.h for the SH2A port.
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*----------------------------------------------------------*/
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#define portINITIAL_SR 0UL /* No interrupts masked. */
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/*-----------------------------------------------------------*/
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@ -74,6 +74,16 @@ static void prvSetupTimerInterrupt( void );
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*/
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void vPortYield( void );
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/*
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* Function to start the first task executing - defined in portasm.src.
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*/
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extern void vPortStartFirstTask( void );
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/*
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* Obtains the current GBR value - defined in portasm.src.
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*/
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extern unsigned long ulPortGetGBR( void );
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/*-----------------------------------------------------------*/
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/*
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@ -81,16 +91,88 @@ void vPortYield( void );
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*/
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portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
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{
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*pxTopOfStack = 0x11111111UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x22222222UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x33333333UL;
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pxTopOfStack--;
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/* SR. */
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*pxTopOfStack = portINITIAL_SR;
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pxTopOfStack--;
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/* PC then MACL, MACH. */
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// *pxTopOfStack = ( unsigned long ) pxCode;
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// pxTopOfStack -= 3;
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*pxTopOfStack = ( unsigned long ) pxCode;
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pxTopOfStack--;
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*pxTopOfStack = 0xffffUL;
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pxTopOfStack--;
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*pxTopOfStack = 0xeeeeUL;
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pxTopOfStack--;
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/* GBR then PR, R14-R5. */
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// *pxTopOfStack = ulPortGetGBR();
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// pxTopOfStack -= 12;
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*pxTopOfStack = 0x00UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x11UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x22UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x33UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x44UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x55UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x66UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x77UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x88UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x99UL;
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pxTopOfStack--;
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*pxTopOfStack = 0xaaUL;
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pxTopOfStack--;
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*pxTopOfStack = 0xbbUL;
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pxTopOfStack--;
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/* Parameters in R4 then R3-R0. */
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// *pxTopOfStack = ( unsigned long ) pvParameters;
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// pxTopOfStack -= 5;
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*pxTopOfStack = 0x1UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x2UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x3UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x4UL;
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pxTopOfStack--;
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*pxTopOfStack = 0x5UL;
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//pxTopOfStack--;
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/* GBR = global base register.
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VBR = vector base register.
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TBR = jump table base register.
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R15 is the stack pointer. */
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return pxTopOfStack;
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}
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/*-----------------------------------------------------------*/
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portBASE_TYPE xPortStartScheduler( void )
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{
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/* Start the tick interrupt. */
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prvSetupTimerInterrupt();
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// prvSetupTimerInterrupt();
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/* Start the first task. */
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trapa( 32 );
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/* Should not get here. */
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return pdFAIL;
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@ -103,11 +185,6 @@ void vPortEndScheduler( void )
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}
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/*-----------------------------------------------------------*/
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void vPortYield( void )
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{
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}
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/*-----------------------------------------------------------*/
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void vPortTickInterrupt( void )
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{
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vTaskIncrementTick();
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136
Source/portable/Renesas/SH2A_FPU/portasm.src
Normal file
136
Source/portable/Renesas/SH2A_FPU/portasm.src
Normal file
@ -0,0 +1,136 @@
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;/*
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; FreeRTOS V6.0.1 - Copyright (C) 2009 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 eBook *
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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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;*/
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.import _pxCurrentTCB
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.import _vTaskSwitchContext
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.export _vPortStartFirstTask
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.export _ulPortGetGBR
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.export _vPortYield
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.section P
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_vPortStartFirstTask:
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; Get the address of the pxCurrentTCB variable.
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mov.l #_pxCurrentTCB, r15
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; Get the address of the task stack from pxCurrentTCB.
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mov.l @r15, r15
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; Get the task stack itself into the stack pointer.
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mov.l @r15, r15
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; Restore r0 to PR (PR is used in place of r15).
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movml.l @r15+, r15
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; Restore system registers.
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ldc.l @r15+, gbr
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lds.l @r15+, mach
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lds.l @r15+, macl
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; Pop the SR and PC to jump to the start of the task.
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rte
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nop
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_vPortYield:
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; Save registers in the same order used by the CPU itself.
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sts.l macl, @-r15
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sts.l mach, @-r15
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stc.l gbr, @-r15
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movml.l r15, @-r15
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; Get the address of pxCurrentTCB
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mov.l #_pxCurrentTCB, r0
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; Get the address of pxTopOfStack from the TCB.
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mov.l @r0, r0
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; Save the stack pointer in pxTopOfStack.
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mov.l r15, @r0
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mov.l #_vTaskSwitchContext, r0
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jsr @r0
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nop
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; Get the address of the pxCurrentTCB variable.
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mov.l #_pxCurrentTCB, r15
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; Get the address of the task stack from pxCurrentTCB.
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mov.l @r15, r15
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; Get the task stack itself into the stack pointer.
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mov.l @r15, r15
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; Restore r0 to PR (PR is used in place of r15).
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movml.l @r15+, r15
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; Restore system registers.
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ldc.l @r15+, gbr
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lds.l @r15+, mach
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lds.l @r15+, macl
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; Pop the SR and PC to jump to the start of the task.
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rte
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nop
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_ulPortGetGBR:
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stc.l gbr, r0
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rts
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nop
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.end
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@ -93,7 +93,7 @@ extern "C" {
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#define portBYTE_ALIGNMENT 4
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#define portSTACK_GROWTH -1
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#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
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#define portYIELD() trapa( 0 )
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#define portYIELD() trapa( 33 )
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#define portNOP() nop()
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/*-----------------------------------------------------------*/
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