/*
* ======== Task_schedule ========
* Find highest priority task and invoke it.
*
* Must be called with interrupts disabled.
*/
Void Task_schedule()
{
Queue_Handle maxQ;
Task_Object *prevTask;
Task_Object *curTask;
#ifndef ti_sysbios_knl_Task_DISABLE_ALL_HOOKS
Int i;
#endif
do {
Task_module->workFlag = 0;
/* stall until a task is ready */
while (Task_module->curSet == 0) {
Task_allBlockedFunction();
}
/* Determine current max ready Task priority */
maxQ = (Queue_Handle)((UInt8 *)(Task_module->readyQ) +
(UInt)(Intrinsics_maxbit(Task_module->curSet)*(2*sizeof(Ptr))));
/* if a higher priority task is ready - switch to it */
if (maxQ > Task_module->curQ) {
prevTask = Task_module->curTask;
Task_module->curQ = maxQ;
Task_module->curTask = Queue_head(maxQ);
curTask = Task_module->curTask;
if (Task_checkStackFlag) {
Task_checkStacks(prevTask, curTask);
}
#if !defined(ti_sysbios_knl_Task_DISABLE_ALL_HOOKS) \
|| (xdc_runtime_Log_DISABLE_ALL == 0)
/* It's safe to enable intrs here */
Hwi_enable();
#ifndef ti_sysbios_knl_Task_DISABLE_ALL_HOOKS
for (i = 0; i < Task_hooks.length; i++) {
if (Task_hooks.elem[i].switchFxn != NULL) {
Task_hooks.elem[i].switchFxn(prevTask, curTask);
}
}
#endif
Log_write4(Task_LM_switch, (UArg)prevTask, (UArg)prevTask->fxn,
(UArg)curTask, (UArg)curTask->fxn);
/* Hard-disable intrs - this fxn is called with them disabled */
Hwi_disable();
#endif
Task_SupportProxy_swap((Ptr)&prevTask->context,
(Ptr)&curTask->context);
}
} while (Task_module->workFlag);
}
/*
* ======== Task_startup ========
*/
Void Task_startup()
{
Queue_Handle maxQ;
Task_Object *prevTask;
Task_Struct dummyTask;
Int i;
Hwi_disable(); /* re-enabled in Task_enter of first task */
/* Use dummyTask as initial task to swap from */
prevTask = Task_handle(&dummyTask);
/* stall until a task is ready */
while (Task_module->curSet == 0) {
Task_allBlockedFunc();
}
/* Determine current max ready Task priority */
maxQ = (Queue_Handle)((UInt8 *)(Task_module->readyQ) +
(UInt)(Intrinsics_maxbit(Task_module->curSet)*(2*sizeof(Ptr))));
Task_module->curQ = maxQ;
Task_module->curTask = Queue_head(maxQ);
/* we've done the scheduler's work */
Task_module->workFlag = 0;
/* Signal that we are entering task thread mode */
BIOS_setThreadType(BIOS_ThreadType_Task);
/* should be safe to enable intrs here */
Hwi_enable();
#ifndef ti_sysbios_knl_Task_DISABLE_ALL_HOOKS
/* Run switch hooks for first real Task */
for (i = 0; i < Task_hooks.length; i++) {
if (Task_hooks.elem[i].switchFxn != NULL) {
Task_hooks.elem[i].switchFxn(NULL, Task_module->curTask);
}
}
#endif
Log_write4(Task_LM_switch, (UArg)0, (UArg)0,
(UArg)Task_module->curTask,
(UArg)Task_module->curTask->fxn);
/* must leave this function with ints disabled */
Hwi_disable();
/* inform dispatcher that we're running on task stack */
Hwi_switchFromBootStack();
/* start first task by way of enter() */
Task_SupportProxy_swap((Ptr)&prevTask->context,
(Ptr)&Task_module->curTask->context);
}
/*
* ======== Power_setConstraint ========
* Declare an operational constraint.
*/
Void Power_setConstraint(Power_Constraint constraint)
{
UInt key;
key = Hwi_disable();
Power_module->constraintsMask |= constraint;
ti_sysbios_family_arm_cc26xx_Power_constraintCounts[
Intrinsics_maxbit(constraint)]++;
Hwi_restore(key);
}
/*
* ======== Power_releaseConstraint ========
* Release a previously declared constraint.
*/
Void Power_releaseConstraint(Power_Constraint constraint)
{
UInt key;
UInt8 count;
key = Hwi_disable();
count = ti_sysbios_family_arm_cc26xx_Power_constraintCounts[
Intrinsics_maxbit(constraint)];
Assert_isTrue(count != 0, Power_A_tooManyCallsReleaseConstraint);
ti_sysbios_family_arm_cc26xx_Power_constraintCounts[
Intrinsics_maxbit(constraint)] = count - 1;
if (count == 1) {
Power_module->constraintsMask &= ~constraint;
}
Hwi_restore(key);
}
Void Swi_restoreHwi(UInt swiKey)
{
Queue_Handle curQ, maxQ;
Swi_Object *swi;
if (swiKey == FALSE) {
if (Swi_module->curSet && (Core_getId() == 0)) {
/* Remember current Swi priority */
curQ = Swi_module->curQ;
/* determine current highest priority Q */
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
/* Run all Swis of higher priority than the current Swi priority */
/* Will pre-empt any currently running swi. */
while (maxQ > curQ) {
swi = (Swi_Object *)Queue_dequeue(maxQ);
/* remove from curSet if last one in this ready list */
if (Queue_empty(maxQ)) {
Swi_module->curSet &= ~swi->mask;
}
Swi_run(swi);
if (Swi_module->curSet == 0) {
break;
}
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
}
}
Swi_module->locked = FALSE;
}
}
/*
* ======== Swi_runLoop ========
*/
Void Swi_runLoop()
{
Queue_Handle curQ, maxQ;
Swi_Object *swi;
/* Remember current Swi priority */
curQ = Swi_module->curQ;
/* refresh maxQ */
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
/*
* Run all Swis of higher priority than
* the current Swi priority.
* Will pre-empt any currently running swi.
*/
do {
swi = (Swi_Object *)Queue_dequeue(maxQ);
/* remove from curSet if last one in this ready list */
if (Queue_empty(maxQ)) {
Swi_module->curSet &= ~swi->mask;
}
Swi_run(swi);
if (Swi_module->curSet == 0) {
break;
}
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
}
while (maxQ > curQ);
}
Void Swi_schedule()
{
Queue_Handle curQ, maxQ;
UInt hwiKey;
UInt tskKey;
/* Remember current Swi priority */
curQ = Swi_module->curQ;
hwiKey = Hwi_disable(); /* required for Swi's posted from Tasks */
/* determine current highest priority Q */
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
if (maxQ > curQ) {
if (BIOS_taskEnabled) {
tskKey = TASK_DISABLE(); /* required for Swi's posted from Tasks */
/* Switch stacks and call Swi_runLoop() */
ti_sysbios_family_xxx_Hwi_switchAndRunFunc(&Swi_runLoop);
}
else {
/* Call Swi_runLoop() */
Swi_runLoop();
}
/* MUST(!) unlock the scheduler before enabling interrupts */
Swi_module->locked = FALSE;
Hwi_restore(hwiKey);
if (BIOS_taskEnabled) {
TASK_RESTORE(tskKey);
}
}
else {
Swi_module->locked = FALSE;
Hwi_restore(hwiKey);
}
}
Void Swi_schedule()
{
Queue_Handle curQ, maxQ;
Swi_Object *swi;
UInt hwiKey;
UInt tskKey;
Char *oldTaskSP;
volatile Bool taskEnabled;
/* Remember current Swi priority */
curQ = Swi_module->curQ;
hwiKey = Hwi_disable(); /* required for Swi's posted from Tasks */
/* determine current highest priority Q */
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
if (maxQ > curQ) {
if (BIOS_taskEnabled) {
tskKey = TASK_DISABLE(); /* required for Swi's posted from Tasks */
/* Switch to HWI stack if not already on it */
oldTaskSP = ti_sysbios_family_xxx_Hwi_switchToIsrStack();
/* must refresh local variables after stack switch */
/* refresh curQ */
curQ = Swi_module->curQ;
/* refresh maxQ */
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
/* set local variable inited after stack switch */
taskEnabled = TRUE;
}
else {
taskEnabled = FALSE;
}
/*
* Run all Swis of higher priority than
* the current Swi priority.
* Will pre-empt any currently running swi.
*/
do {
swi = (Swi_Object *)Queue_dequeue(maxQ);
/* remove from curSet if last one in this ready list */
if (Queue_empty(maxQ)) {
Swi_module->curSet &= ~swi->mask;
}
Swi_run(swi);
if (Swi_module->curSet == 0) {
break;
}
maxQ = (Queue_Handle)((UInt8 *)(Swi_module->readyQ) +
(UInt)(Intrinsics_maxbit(Swi_module->curSet)*(2*sizeof(Ptr))));
}
while (maxQ > curQ);
/* check local variable inited after stack switch */
if (taskEnabled) {
/* Switch back to Task stack if at bottom of HWI stack */
ti_sysbios_family_xxx_Hwi_switchToTaskStack(oldTaskSP);
}
/* MUST(!) unlock the scheduler before enabling interrupts */
Swi_module->locked = FALSE;
Hwi_restore(hwiKey);
if (BIOS_taskEnabled) {
TASK_RESTORE(tskKey);
}
}
else {
Swi_module->locked = FALSE;
Hwi_restore(hwiKey);
}
}
