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Change the critical section handling (Fujitsu 32bit port).

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This commit is contained in:
Richard Barry 2008-02-11 21:02:40 +00:00
parent eb64d935dc
commit 7e5450acd1
2 changed files with 56 additions and 21 deletions
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51
Source/portable/Softune/MB91460/port.c
View file

@ -51,6 +51,10 @@ any details of its type. */
typedef void tskTCB;
extern volatile tskTCB * volatile pxCurrentTCB;
/* Constants required to handle critical sections. */
#define portNO_CRITICAL_NESTING ( ( unsigned portBASE_TYPE ) 0 )
volatile unsigned portLONG ulCriticalNesting = 9999UL;
/*-----------------------------------------------------------*/
@ -64,6 +68,10 @@ extern volatile tskTCB * volatile pxCurrentTCB;
ST MDH, @-R15 ;Store MDH
ST MDL, @-R15 ;Store MDL
LDI #_ulCriticalNesting, R0 ;Get the address of the critical nesting counter
LD @R0, R0 ;Get the value of the critical nesting counter
ST R0, @-R15 ;Store the critical nesting value to the user stack.
ANDCCR #0xDF ;Switch back to system stack
LD @R15+,R0 ;Store PC to R0
ORCCR #0x20 ;Switch to user stack
@ -98,6 +106,10 @@ extern volatile tskTCB * volatile pxCurrentTCB;
ORCCR #0x20 ;Switch back to retreive the remaining context
LDI #_ulCriticalNesting, R0 ;Get the address of the critical nesting counter
LD @R15+, R1 ;Get the saved critical nesting value
ST R1, @R0 ;Save the critical nesting value into the ulCriticalNesting variable
LD @R15+, MDL ;Restore MDL
LD @R15+, MDH ;Restore MDH
LDM1 (R14,R13,R12,R11,R10,R9,R8) ;Restore R14-R8
@ -124,8 +136,6 @@ static void prvSetupTimerInterrupt( void );
*/
portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters )
{
unsigned portSHORT usAddress;
/* Place a few bytes of known values on the bottom of the stack.
This is just useful for debugging. */
@ -185,8 +195,13 @@ unsigned portSHORT usAddress;
*pxTopOfStack = ( portSTACK_TYPE ) 0x22220000; /* MDL */
pxTopOfStack--;
usAddress = ( unsigned portSHORT ) pxCode;
*pxTopOfStack = ( portSTACK_TYPE ) usAddress ; /* PC */
/* The task starts with its ulCriticalNesting variable set to 0, interrupts
being enabled. */
*pxTopOfStack = portNO_CRITICAL_NESTING;
pxTopOfStack--;
/* The start of the task code. */
*pxTopOfStack = ( portSTACK_TYPE ) pxCode; /* PC */
pxTopOfStack--;
/* PS - User Mode, USP, ILM=31, Interrupts enabled */
@ -351,3 +366,31 @@ const unsigned portSHORT usReloadValue = ( unsigned portSHORT ) ( ( ( configPER_
RETI
#pragma endasm
/*-----------------------------------------------------------*/
void vPortEnterCritical( void )
{
/* Disable interrupts */
portDISABLE_INTERRUPTS();
/* Now interrupts are disabled ulCriticalNesting can be accessed
directly. Increment ulCriticalNesting to keep a count of how many times
portENTER_CRITICAL() has been called. */
ulCriticalNesting++;
}
/*-----------------------------------------------------------*/
void vPortExitCritical( void )
{
if( ulCriticalNesting > portNO_CRITICAL_NESTING )
{
ulCriticalNesting--;
if( ulCriticalNesting == portNO_CRITICAL_NESTING )
{
/* Enable all interrupt/exception. */
portENABLE_INTERRUPTS();
}
}
}
/*-----------------------------------------------------------*/

26
Source/portable/Softune/MB91460/portmacro.h
View file

@ -59,7 +59,7 @@
#define portDOUBLE double
#define portLONG long
#define portSHORT int
#define portSTACK_TYPE unsigned portSHORT
#define portSTACK_TYPE unsigned portLONG
#define portBASE_TYPE long
/* This is required since SOFTUNE doesn't support inline directive as is. */
@ -75,20 +75,12 @@
/*-----------------------------------------------------------*/
/* Critical section management. */
#define portENTER_CRITICAL() \
__asm(" ST PS,@-R15 "); \
__asm(" ANDCCR #0xef "); \
#define portEXIT_CRITICAL() \
__asm(" LD @R15+,PS "); \
#define portDISABLE_INTERRUPTS() __DI();
#define portENABLE_INTERRUPTS() __EI();
void vPortEnterCritical( void );
void vPortExitCritical( void );
#define portENTER_CRITICAL() vPortEnterCritical()
#define portEXIT_CRITICAL() vPortExitCritical()
#define portDISABLE_INTERRUPTS() __DI();
#define portENABLE_INTERRUPTS() __EI();
/*-----------------------------------------------------------*/
@ -102,8 +94,8 @@
/* portYIELD() uses SW interrupt */
#define portYIELD() __asm( " INT #40H " );
/* portYIELDFromISR() uses delayed interrupt */
#define portYIELDFromISR() DICR_DLYI = 1;
/* portYIELD_FROM_ISR() uses delayed interrupt */
#define portYIELD_FROM_ISR() DICR_DLYI = 1
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */