diff options
Diffstat (limited to 'FreeRTOS/Source/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s')
| -rw-r--r-- | FreeRTOS/Source/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/FreeRTOS/Source/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s b/FreeRTOS/Source/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s index 31623f2f2..aa65b946f 100644 --- a/FreeRTOS/Source/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s +++ b/FreeRTOS/Source/portable/ARMv8M/non_secure/portable/IAR/ARM_CM33_NTZ/portasm.s @@ -24,6 +24,12 @@ *
* 1 tab == 4 spaces!
*/
+/* Including FreeRTOSConfig.h here will cause build errors if the header file
+contains code not understood by the assembler - for example the 'extern' keyword.
+To avoid errors place any such code inside a #ifdef __ICCARM__/#endif block so
+the code is included in C files but excluded by the preprocessor in assembly
+files (__ICCARM__ is defined by the IAR C compiler but not by the IAR assembler. */
+#include "FreeRTOSConfig.h"
EXTERN pxCurrentTCB
EXTERN vTaskSwitchContext
@@ -34,8 +40,8 @@ PUBLIC vRestoreContextOfFirstTask
PUBLIC vRaisePrivilege
PUBLIC vStartFirstTask
- PUBLIC ulSetInterruptMaskFromISR
- PUBLIC vClearInterruptMaskFromISR
+ PUBLIC ulSetInterruptMask
+ PUBLIC vClearInterruptMask
PUBLIC PendSV_Handler
PUBLIC SVC_Handler
/*-----------------------------------------------------------*/
@@ -142,15 +148,20 @@ vStartFirstTask: svc 2 /* System call to start the first task. portSVC_START_SCHEDULER = 2. */
/*-----------------------------------------------------------*/
-ulSetInterruptMaskFromISR:
- mrs r0, PRIMASK
- cpsid i
- bx lr
+ulSetInterruptMask:
+ mrs r0, basepri /* r0 = basepri. Return original basepri value. */
+ mov r1, #configMAX_SYSCALL_INTERRUPT_PRIORITY
+ msr basepri, r1 /* Disable interrupts upto configMAX_SYSCALL_INTERRUPT_PRIORITY. */
+ dsb
+ isb
+ bx lr /* Return. */
/*-----------------------------------------------------------*/
-vClearInterruptMaskFromISR:
- msr PRIMASK, r0
- bx lr
+vClearInterruptMask:
+ msr basepri, r0 /* basepri = ulMask. */
+ dsb
+ isb
+ bx lr /* Return. */
/*-----------------------------------------------------------*/
PendSV_Handler:
@@ -175,9 +186,13 @@ PendSV_Handler: ldr r1, [r2] /* Read pxCurrentTCB. */
str r0, [r1] /* Save the new top of stack in TCB. */
- cpsid i
+ mov r0, #configMAX_SYSCALL_INTERRUPT_PRIORITY
+ msr basepri, r0 /* Disable interrupts upto configMAX_SYSCALL_INTERRUPT_PRIORITY. */
+ dsb
+ isb
bl vTaskSwitchContext
- cpsie i
+ mov r0, #0 /* r0 = 0. */
+ msr basepri, r0 /* Enable interrupts. */
ldr r2, =pxCurrentTCB /* Read the location of pxCurrentTCB i.e. &( pxCurrentTCB ). */
ldr r1, [r2] /* Read pxCurrentTCB. */
|