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portable: aarch64_sre: add configUSE_TASK_FPU_SUPPORT support

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This is a direct backport of upstream commit [1] for aarch64 (legacy operation port)
done under [2]
The same code can be applied on the aarch SRE port to be able to enable FPU context
saving on all tasks context switch to mitigate GCC optimization to use SIMD registers
for copy.

[1] "55eceb22: Add configUSE_TASK_FPU_SUPPORT to AARCH64 port (#1048)"
[2] https://github.com/FreeRTOS/FreeRTOS-Kernel/pull/1048

Signed-off-by: Marouen Ghodhbane <marouen.ghodhbane@nxp.com>
This commit is contained in:
Marouen Ghodhbane 2024-10-09 17:31:45 +02:00 • committed by Archit Gupta
parent 1b8f5965d3
commit ff0989e46b
2 changed files with 55 additions and 14 deletions
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15
portable/GCC/ARM_AARCH64_SRE/portmacro.h
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@ -135,9 +135,18 @@ extern void vPortInstallFreeRTOSVectorTable( void );
* handler for whichever peripheral is used to generate the RTOS tick. */
void FreeRTOS_Tick_Handler( void );
/* Any task that uses the floating point unit MUST call vPortTaskUsesFPU()
* before any floating point instructions are executed. */
void vPortTaskUsesFPU( void );
/* If configUSE_TASK_FPU_SUPPORT is set to 1 (or left undefined) then tasks are
* created without an FPU context and must call vPortTaskUsesFPU() to give
* themselves an FPU context before using any FPU instructions. If
* configUSE_TASK_FPU_SUPPORT is set to 2 then all tasks will have an FPU context
* by default. */
#if ( configUSE_TASK_FPU_SUPPORT != 2 )
void vPortTaskUsesFPU( void );
#else
/* Each task has an FPU context already, so define this function away to
* nothing to prevent it from being called accidentally. */
#define vPortTaskUsesFPU()
#endif
#define portTASK_USES_FLOATING_POINT() vPortTaskUsesFPU()
#define portLOWEST_INTERRUPT_PRIORITY ( ( ( uint32_t ) configUNIQUE_INTERRUPT_PRIORITIES ) - 1UL )