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Automatically pin no-cpu-affinity task to a core when FPU is used

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This commit is contained in:
Jeroen Domburg 2016-09-28 17:02:44 +08:00
parent a9502dffd3
commit b3309a03a3
3 changed files with 33 additions and 0 deletions
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6
components/freertos/include/freertos/task.h
View File

@ -1979,6 +1979,12 @@ BaseType_t xTaskGenericCreate( TaskFunction_t pxTaskCode, const char * const pcN
*/
UBaseType_t uxTaskGetTaskNumber( TaskHandle_t xTask ) PRIVILEGED_FUNCTION;
/*
* Get the current core affinity of a task
*/
BaseType_t xTaskGetAffinity( TaskHandle_t xTask ) PRIVILEGED_FUNCTION;
/*
* Set the uxTaskNumber of the task referenced by the xTask parameter to
* uxHandle.

12
components/freertos/tasks.c
View File

@ -3337,6 +3337,18 @@ TCB_t *pxNewTCB;
}
/*-----------------------------------------------------------*/
BaseType_t xTaskGetAffinity( TaskHandle_t xTask )
{
TCB_t *pxTCB;
UBaseType_t uxReturn;
pxTCB = prvGetTCBFromHandle( xTask );
return pxTCB->xCoreID;
}
/*-----------------------------------------------------------*/
#if ( configUSE_TRACE_FACILITY == 1 )
static UBaseType_t prvListTaskWithinSingleList( TaskStatus_t *pxTaskStatusArray, List_t *pxList, eTaskState eState )

15
components/freertos/xtensa_vectors.S
View File

@ -92,6 +92,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "xtensa_rtos.h"
.extern pxCurrentTCB
/* Enable stack backtrace across exception/interrupt - see below */
#define XT_DEBUG_BACKTRACE 0
@ -892,6 +893,20 @@ _xt_coproc_exc:
addx4 a0, a5, a0 /* a0 = &_xt_coproc_mask[n] */
l32i a0, a0, 0 /* a0 = (n << 16) | (1 << n) */
/* TODO: Remove this as soon as coprocessor state moving works across cores - JD */
/* FPU operations are incompatible with non-pinned tasks. If we have a FPU operation
here, to keep the entire thing from crashing, it's better to pin the task to whatever
core we're running on now. */
movi a2, pxCurrentTCB
getcoreid a3
slli a3, a3, 2
add a2, a2, a3
l32i a2, a2, 0 /* a2 = start of pxCurrentTCB[cpuid] */
addi a2, a2, (0x3C+configMAX_TASK_NAME_LEN+3)&~3 /* offset to xCoreID in tcb struct */
getcoreid a3
s32i a3, a2, 0 /* store current cpuid */
/* Grab correct xt_coproc_owner_sa for this core */
getcoreid a2
movi a3, XCHAL_CP_MAX << 2
mull a2, a2, a3