github-forks
/
FreeRTOS
mirror of https://github.com/FreeRTOS/FreeRTOS.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Work in progress.

Browse Source
pull/1/head
Richard Barry 15 years ago
parent c99f3c55cd
commit 68074c03d6
3 changed files with 225 additions and 12 deletions
Show Stats Download Patch File Download Diff File

99
Source/portable/Renesas/SH2A_FPU/port.c
Unescape Escape View File

@ -51,15 +51,15 @@
licensing and training services.
*/
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the SH2A port.
*----------------------------------------------------------*/
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
/*-----------------------------------------------------------
* Implementation of functions defined in portable.h for the SH2A port.
*----------------------------------------------------------*/
#define portINITIAL_SR 0UL /* No interrupts masked. */
/*-----------------------------------------------------------*/
@ -74,6 +74,16 @@ static void prvSetupTimerInterrupt( void );
*/
void vPortYield( void );
/*
* Function to start the first task executing - defined in portasm.src.
*/
extern void vPortStartFirstTask( void );
/*
* Obtains the current GBR value - defined in portasm.src.
*/
extern unsigned long ulPortGetGBR( void );
/*-----------------------------------------------------------*/
/*
@ -81,16 +91,88 @@ void vPortYield( void );
*/
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
*pxTopOfStack = 0x11111111UL;
pxTopOfStack--;
*pxTopOfStack = 0x22222222UL;
pxTopOfStack--;
*pxTopOfStack = 0x33333333UL;
pxTopOfStack--;
/* SR. */
*pxTopOfStack = portINITIAL_SR;
pxTopOfStack--;
/* PC then MACL, MACH. */
// *pxTopOfStack = ( unsigned long ) pxCode;
// pxTopOfStack -= 3;
*pxTopOfStack = ( unsigned long ) pxCode;
pxTopOfStack--;
*pxTopOfStack = 0xffffUL;
pxTopOfStack--;
*pxTopOfStack = 0xeeeeUL;
pxTopOfStack--;
/* GBR then PR, R14-R5. */
// *pxTopOfStack = ulPortGetGBR();
// pxTopOfStack -= 12;
*pxTopOfStack = 0x00UL;
pxTopOfStack--;
*pxTopOfStack = 0x11UL;
pxTopOfStack--;
*pxTopOfStack = 0x22UL;
pxTopOfStack--;
*pxTopOfStack = 0x33UL;
pxTopOfStack--;
*pxTopOfStack = 0x44UL;
pxTopOfStack--;
*pxTopOfStack = 0x55UL;
pxTopOfStack--;
*pxTopOfStack = 0x66UL;
pxTopOfStack--;
*pxTopOfStack = 0x77UL;
pxTopOfStack--;
*pxTopOfStack = 0x88UL;
pxTopOfStack--;
*pxTopOfStack = 0x99UL;
pxTopOfStack--;
*pxTopOfStack = 0xaaUL;
pxTopOfStack--;
*pxTopOfStack = 0xbbUL;
pxTopOfStack--;
/* Parameters in R4 then R3-R0. */
// *pxTopOfStack = ( unsigned long ) pvParameters;
// pxTopOfStack -= 5;
*pxTopOfStack = 0x1UL;
pxTopOfStack--;
*pxTopOfStack = 0x2UL;
pxTopOfStack--;
*pxTopOfStack = 0x3UL;
pxTopOfStack--;
*pxTopOfStack = 0x4UL;
pxTopOfStack--;
*pxTopOfStack = 0x5UL;
//pxTopOfStack--;
/* GBR = global base register.
VBR = vector base register.
TBR = jump table base register.
R15 is the stack pointer. */
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortStartScheduler( void )
{
/* Start the tick interrupt. */
prvSetupTimerInterrupt();
// prvSetupTimerInterrupt();
/* Start the first task. */
trapa( 32 );
/* Should not get here. */
return pdFAIL;
@ -103,11 +185,6 @@ void vPortEndScheduler( void )
}
/*-----------------------------------------------------------*/
void vPortYield( void )
{
}
/*-----------------------------------------------------------*/
void vPortTickInterrupt( void )
{
vTaskIncrementTick();

136
Source/portable/Renesas/SH2A_FPU/portasm.src
Unescape Escape View File

@ -0,0 +1,136 @@
;/*
; FreeRTOS V6.0.1 - Copyright (C) 2009 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 eBook *
; * *
; * "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.
;*/
.import _pxCurrentTCB
.import _vTaskSwitchContext
.export _vPortStartFirstTask
.export _ulPortGetGBR
.export _vPortYield
.section P
_vPortStartFirstTask:
; Get the address of the pxCurrentTCB variable.
mov.l #_pxCurrentTCB, r15
; Get the address of the task stack from pxCurrentTCB.
mov.l @r15, r15
; Get the task stack itself into the stack pointer.
mov.l @r15, r15
; Restore r0 to PR (PR is used in place of r15).
movml.l @r15+, r15
; Restore system registers.
ldc.l @r15+, gbr
lds.l @r15+, mach
lds.l @r15+, macl
; Pop the SR and PC to jump to the start of the task.
rte
nop
_vPortYield:
; Save registers in the same order used by the CPU itself.
sts.l macl, @-r15
sts.l mach, @-r15
stc.l gbr, @-r15
movml.l r15, @-r15
; Get the address of pxCurrentTCB
mov.l #_pxCurrentTCB, r0
; Get the address of pxTopOfStack from the TCB.
mov.l @r0, r0
; Save the stack pointer in pxTopOfStack.
mov.l r15, @r0
mov.l #_vTaskSwitchContext, r0
jsr @r0
nop
; Get the address of the pxCurrentTCB variable.
mov.l #_pxCurrentTCB, r15
; Get the address of the task stack from pxCurrentTCB.
mov.l @r15, r15
; Get the task stack itself into the stack pointer.
mov.l @r15, r15
; Restore r0 to PR (PR is used in place of r15).
movml.l @r15+, r15
; Restore system registers.
ldc.l @r15+, gbr
lds.l @r15+, mach
lds.l @r15+, macl
; Pop the SR and PC to jump to the start of the task.
rte
nop
_ulPortGetGBR:
stc.l gbr, r0
rts
nop
.end

2
Source/portable/Renesas/SH2A_FPU/portmacro.h
Unescape Escape View File

@ -93,7 +93,7 @@ extern "C" {
#define portBYTE_ALIGNMENT 4
#define portSTACK_GROWTH -1
#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
#define portYIELD() trapa( 0 )
#define portYIELD() trapa( 33 )
#define portNOP() nop()
/*-----------------------------------------------------------*/

Write Preview
Loading…
Cancel
Save