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sched/signal: Optimize code logic

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Adjust the up_schedule_sigaction function to facilitate subsequent spinlock optimization work.

Signed-off-by: wangzhi16 <wangzhi16@xiaomi.com>
This commit is contained in:
wangzhi16
2025-03-17 17:49:43 +08:00
committed by Xiang Xiao
parent 5775037da6
commit 364a633ec3
31 changed files with 436 additions and 1120 deletions
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arch/ceva/src/common/ceva_schedulesigaction.c
+16 -46
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@@ -85,61 +85,31 @@ void up_schedule_sigaction(struct tcb_s *tcb)
if (tcb->task_state == TSTATE_TASK_RUNNING)
{
uint8_t me = this_cpu();
#ifdef CONFIG_SMP
uint8_t cpu = tcb->cpu;
#else
uint8_t cpu = 0;
#endif
/* Save the current register context location */
/* CASE 1: We are not in an interrupt handler and a task is
* signaling itself for some reason.
tcb->xcp.saved_regs = up_current_regs();
/* Duplicate the register context. These will be
* restored by the signal trampoline after the signal has been
* delivered.
*/
if (cpu == me && !up_current_regs())
{
/* In this case just deliver the signal now. */
up_current_regs() -= XCPTCONTEXT_REGS;
memcpy(up_current_regs(), up_current_regs() +
XCPTCONTEXT_REGS, XCPTCONTEXT_SIZE);
(tcb->sigdeliver)(tcb);
tcb->sigdeliver = NULL;
}
up_current_regs()[REG_SP] = (uint32_t)up_current_regs();
/* CASE 2: The task that needs to receive the signal is running.
* This could happen if the task is running on another CPU OR if
* we are in an interrupt handler and the task is running on this
* CPU. In the former case, we will have to PAUSE the other CPU
* first. But in either case, we will have to modify the return
* state as well as the state in the TCB.
/* Then set up to vector to the trampoline with interrupts
* unchanged. We must already be in privileged thread mode
* to be here.
*/
else
{
/* Save the current register context location */
tcb->xcp.saved_regs = up_current_regs();
/* Duplicate the register context. These will be
* restored by the signal trampoline after the signal has been
* delivered.
*/
up_current_regs() -= XCPTCONTEXT_REGS;
memcpy(up_current_regs(), up_current_regs() +
XCPTCONTEXT_REGS, XCPTCONTEXT_SIZE);
up_current_regs()[REG_SP] = (uint32_t)up_current_regs();
/* Then set up to vector to the trampoline with interrupts
* unchanged. We must already be in privileged thread mode
* to be here.
*/
up_current_regs()[REG_PC] = (uint32_t)ceva_sigdeliver;
up_current_regs()[REG_PC] = (uint32_t)ceva_sigdeliver;
#ifdef REG_OM
up_current_regs()[REG_OM] &= ~REG_OM_MASK;
up_current_regs()[REG_OM] |= REG_OM_KERNEL;
up_current_regs()[REG_OM] &= ~REG_OM_MASK;
up_current_regs()[REG_OM] |= REG_OM_KERNEL;
#endif
}
}
/* Otherwise, we are (1) signaling a task is not running from an