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Add flop support.

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This commit is contained in:
Richard Barry 2010-01-17 13:12:54 +00:00
parent 65b947b50f
commit 094945625d
3 changed files with 137 additions and 22 deletions
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64
Source/portable/Renesas/SH2A_FPU/port.c
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@ -59,8 +59,16 @@
#include "FreeRTOS.h"
#include "task.h"
#define portINITIAL_SR 0UL /* No interrupts masked. */
/* Library includes. */
#include "string.h"
#define portINITIAL_SR 0UL /* No interrupts masked. */
/* Allocate enough space for FPR0 to FPR15, FPUL and FPSCR, each of which is 4
bytes big. If this number is changed then the 72 in portasm.src also needs
changing. */
#define portFLOP_REGISTERS_TO_STORE ( 18 )
#define portFLOP_STORAGE_SIZE ( portFLOP_REGISTERS_TO_STORE * 4 )
/*-----------------------------------------------------------*/
@ -196,7 +204,7 @@ portBASE_TYPE xPortStartScheduler( void )
prvSetupTimerInterrupt();
/* Start the first task. */
trapa( 32 );
trapa( portSTART_SCHEDULER_TRAP_NO );
/* Should not get here. */
return pdFAIL;
@ -229,6 +237,58 @@ extern void vApplicationSetupTimerInterrupt( void );
}
/*-----------------------------------------------------------*/
void vPortYield( void )
{
long lInterruptMask;
lInterruptMask = get_imask();
/* taskYIELD() can only be called from a task, not an interrupt, so the
current interrupt mask can only be 0 or portKERNEL_INTERRUPT_PRIORITY and
the mask can be set without risk of accidentally lowering the mask value. */
set_imask( portKERNEL_INTERRUPT_PRIORITY );
trapa( portYIELD_TRAP_NO );
set_imask( ( int ) lInterruptMask );
}
/*-----------------------------------------------------------*/
portBASE_TYPE xPortUsesFloatingPoint( xTaskHandle xTask )
{
unsigned long *pulFlopBuffer;
portBASE_TYPE xReturn;
extern void * volatile pxCurrentTCB;
if( xTask == NULL )
{
xTask = pxCurrentTCB;
}
/* Allocate a buffer large enough to hold all the flop registers. */
pulFlopBuffer = ( unsigned long * ) pvPortMalloc( portFLOP_STORAGE_SIZE );
if( pulFlopBuffer != NULL )
{
memset( ( void * ) pulFlopBuffer, 0x00, portFLOP_STORAGE_SIZE );
*pulFlopBuffer = get_fpscr();
/* Use the task tag to point to the flop buffer. Pass pointer to just above
the buffer because the flop save routine uses a pre-decrement. */
vTaskSetApplicationTaskTag( xTask, ( void * ) ( pulFlopBuffer + portFLOP_REGISTERS_TO_STORE ) );
xReturn = pdPASS;
}
else
{
xReturn = pdFAIL;
}
return xReturn;
}
/*-----------------------------------------------------------*/