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Ensure that the configMAX_SYSCALL_INTERRUPT_PRIORITY setting works with all possible values.

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This commit is contained in:
Richard Barry 2011-04-05 09:45:42 +00:00
parent 9133ceb44d
commit 8fc0c27ea5
3 changed files with 39 additions and 24 deletions
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8
Source/portable/MPLAB/PIC32MX/port.c
View file

@ -204,7 +204,13 @@ unsigned portBASE_TYPE uxSavedStatusRegister;
asm volatile ( "di" );
uxSavedStatusRegister = _CP0_GET_STATUS() | 0x01;
_CP0_SET_STATUS( ( uxSavedStatusRegister | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) );
/* This clears the IPL bits, then sets them to
configMAX_SYSCALL_INTERRUPT_PRIORITY. This function should not be called
from an interrupt that has a priority above
configMAX_SYSCALL_INTERRUPT_PRIORITY so, when used correctly, the action
can only result in the IPL being unchanged or raised, and therefore never
lowered. */
_CP0_SET_STATUS( ( ( uxSavedStatusRegister & ( ~portALL_IPL_BITS ) ) ) | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) );
return uxSavedStatusRegister;
}

9
Source/portable/MPLAB/PIC32MX/port_asm.S
View file

@ -195,11 +195,14 @@ vPortYieldISR:
lw s7, (s7)
sw s5, (s7)
/* Set the interrupt mask to the max priority that can use the API. */
/* Set the interrupt mask to the max priority that can use the API. The
yield handler will only be called at configKERNEL_INTERRUPT_PRIORITY which
is below configMAX_SYSCALL_INTERRUPT_PRIORITY - so this can only ever
raise the IPL value and never lower it. */
di
mfc0 s7, _CP0_STATUS
ori s7, s7, 1
ori s6, s7, configMAX_SYSCALL_INTERRUPT_PRIORITY << 10
ins s7, $0, 10, 6
ori s6, s7, ( configMAX_SYSCALL_INTERRUPT_PRIORITY << 10 ) | 1
/* This mtc0 re-enables interrupts, but only above
configMAX_SYSCALL_INTERRUPT_PRIORITY. */

46
Source/portable/MPLAB/PIC32MX/portmacro.h
View file

@ -84,7 +84,7 @@ extern "C" {
typedef unsigned portSHORT portTickType;
#define portMAX_DELAY ( portTickType ) 0xffff
#else
typedef unsigned portLONG portTickType;
typedef unsigned long portTickType;
#define portMAX_DELAY ( portTickType ) 0xffffffff
#endif
/*-----------------------------------------------------------*/
@ -96,28 +96,34 @@ extern "C" {
/*-----------------------------------------------------------*/
/* Critical section management. */
#define portIPL_SHIFT ( 10 )
#define portALL_IPL_BITS ( 0x3f << portIPL_SHIFT )
#define portIPL_SHIFT ( 10UL )
#define portALL_IPL_BITS ( 0x3fUL << portIPL_SHIFT )
#define portSW0_BIT ( 0x01 << 8 )
#define portDISABLE_INTERRUPTS() \
{ \
unsigned portLONG ulStatus; \
\
/* Mask interrupts at and below the kernel interrupt priority. */ \
ulStatus = _CP0_GET_STATUS(); \
ulStatus |= ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ); \
_CP0_SET_STATUS( ulStatus ); \
/* This clears the IPL bits, then sets them to
configMAX_SYSCALL_INTERRUPT_PRIORITY. This function should not be called
from an interrupt, so therefore will not be called with an IPL setting
above configMAX_SYSCALL_INTERRUPT_PRIORITY. Therefore, when used correctly, the
instructions in this macro can only result in the IPL being raised, and
therefore never lowered. */
#define portDISABLE_INTERRUPTS() \
{ \
unsigned long ulStatus; \
\
/* Mask interrupts at and below the kernel interrupt priority. */ \
ulStatus = _CP0_GET_STATUS(); \
ulStatus &= ~portALL_IPL_BITS; \
_CP0_SET_STATUS( ( ulStatus | ( configMAX_SYSCALL_INTERRUPT_PRIORITY << portIPL_SHIFT ) ) ); \
}
#define portENABLE_INTERRUPTS() \
{ \
unsigned portLONG ulStatus; \
\
/* Unmask all interrupts. */ \
ulStatus = _CP0_GET_STATUS(); \
ulStatus &= ~portALL_IPL_BITS; \
_CP0_SET_STATUS( ulStatus ); \
#define portENABLE_INTERRUPTS() \
{ \
unsigned long ulStatus; \
\
/* Unmask all interrupts. */ \
ulStatus = _CP0_GET_STATUS(); \
ulStatus &= ~portALL_IPL_BITS; \
_CP0_SET_STATUS( ulStatus ); \
}
@ -138,7 +144,7 @@ extern void vPortClearInterruptMaskFromISR( unsigned portBASE_TYPE );
#define portYIELD() \
{ \
unsigned portLONG ulStatus; \
unsigned long ulStatus; \
\
/* Trigger software interrupt. */ \
ulStatus = _CP0_GET_CAUSE(); \