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Revert to original critical section handling method.

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This commit is contained in:
Richard Barry 2008-02-15 13:24:05 +00:00
parent f44fc2c665
commit 991624461f
2 changed files with 8 additions and 50 deletions
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46
Source/portable/Softune/MB91460/port.c
View file

@ -51,10 +51,6 @@ 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;
/*-----------------------------------------------------------*/
#pragma asm
@ -65,10 +61,6 @@ volatile unsigned portLONG ulCriticalNesting = 9999UL;
STM1 (R14,R13,R12,R11,R10,R9,R8) ;Store R14-R8
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
@ -104,10 +96,6 @@ volatile unsigned portLONG ulCriticalNesting = 9999UL;
ORCCR #0x20 ;Switch back to retrieve 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
@ -192,11 +180,6 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
*pxTopOfStack = ( portSTACK_TYPE ) 0x22220000; /* MDL */
pxTopOfStack--;
/* 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--;
@ -351,32 +334,3 @@ const unsigned portSHORT usReloadValue = ( unsigned portSHORT ) ( ( ( configPER_
#pragma endasm
/*-----------------------------------------------------------*/
void vPortEnterCritical( void )
{
/* Disable interrupts upto level 30. */
#if configKERNEL_INTERRUPT_PRIORITY != 30
#error configKERNEL_INTERRUPT_PRIORITY (set in FreeRTOSConfig.h) must match the ILM value set in the following line - 30 (0x1e) being the default.
#endif
__asm(" STILM #1Eh ");
/* 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 interrupts */
__asm(" STILM #1Fh ");
}
}
}

12
Source/portable/Softune/MB91460/portmacro.h
View file

@ -78,10 +78,14 @@
/*-----------------------------------------------------------*/
/* Critical section management. */
void vPortEnterCritical( void );
void vPortExitCritical( void );
#define portENTER_CRITICAL() vPortEnterCritical()
#define portEXIT_CRITICAL() vPortExitCritical()
#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();