arch: remove up_cpu_pause up_cpu_resume up_cpu_paused up_cpu_pausereq

reason:
  To remove the "sync pause" and decouple the critical section from the dependency on enabling interrupts,
  after that we need to further implement "schedlock + spinlock".
changelist
  1 Modify the implementation of critical sections to no longer involve enabling interrupts or handling synchronous pause events.
  2 GIC_SMP_CPUCALL attach to pause handler to remove arch interface up_cpu_paused_restore up_cpu_paused_save
  3 Completely remove up_cpu_pause, up_cpu_resume, up_cpu_paused, and up_cpu_pausereq
  4 change up_cpu_pause_async to up_send_cpu_sgi

Signed-off-by: hujun5 <hujun5@xiaomi.com>

include/nuttx/arch.h

@@ -2288,34 +2288,6 @@ int up_cpu_idlestack(int cpu, FAR struct tcb_s *tcb, size_t stack_size);
 int up_cpu_start(int cpu);
 #endif
 
-/****************************************************************************
- * Name: up_cpu_pause
- *
- * Description:
- *   Save the state of the current task at the head of the
- *   g_assignedtasks[cpu] task list and then pause task execution on the
- *   CPU.
- *
- *   This function is called by the OS when the logic executing on one CPU
- *   needs to modify the state of the g_assignedtasks[cpu] list for another
- *   CPU.
- *
- * Input Parameters:
- *   cpu - The index of the CPU to be paused.
- *
- * Returned Value:
- *   Zero on success; a negated errno value on failure.
- *
- * Assumptions:
- *   Called from within a critical section; up_cpu_resume() must be called
- *   later while still within the same critical section.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SMP
-int up_cpu_pause(int cpu);
-#endif
-
 /****************************************************************************
  * Name: up_cpu_pause_async
  *
@@ -2339,126 +2311,6 @@ int up_cpu_pause(int cpu);
 int up_cpu_pause_async(int cpu);
 #endif
 
-/****************************************************************************
- * Name: up_cpu_pausereq
- *
- * Description:
- *   Return true if a pause request is pending for this CPU.
- *
- * Input Parameters:
- *   cpu - The index of the CPU to be queried
- *
- * Returned Value:
- *   true   = a pause request is pending.
- *   false = no pasue request is pending.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SMP
-bool up_cpu_pausereq(int cpu);
-#endif
-
-/****************************************************************************
- * Name: up_cpu_paused_save
- *
- * Description:
- *   Handle a pause request from another CPU.  Normally, this logic is
- *   executed from interrupt handling logic within the architecture-specific
- *   However, it is sometimes necessary to perform the pending
- *   pause operation in other contexts where the interrupt cannot be taken
- *   in order to avoid deadlocks.
- *
- * Input Parameters:
- *   None
- *
- * Returned Value:
- *   On success, OK is returned.  Otherwise, a negated errno value indicating
- *   the nature of the failure is returned.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SMP
-int up_cpu_paused_save(void);
-#endif
-
-/****************************************************************************
- * Name: up_cpu_paused
- *
- * Description:
- *   Handle a pause request from another CPU.  Normally, this logic is
- *   executed from interrupt handling logic within the architecture-specific
- *   However, it is sometimes necessary to perform the pending pause
- *   operation in other contexts where the interrupt cannot be taken
- *   in order to avoid deadlocks.
- *
- *   This function performs the following operations:
- *
- *   1. It saves the current task state at the head of the current assigned
- *      task list.
- *   2. It waits on a spinlock, then
- *   3. Returns from interrupt, restoring the state of the new task at the
- *      head of the ready to run list.
- *
- * Input Parameters:
- *   cpu - The index of the CPU to be paused
- *
- * Returned Value:
- *   On success, OK is returned.  Otherwise, a negated errno value indicating
- *   the nature of the failure is returned.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SMP
-int up_cpu_paused(int cpu);
-#endif
-
-/****************************************************************************
- * Name: up_cpu_paused_restore
- *
- * Description:
- *  Restore the state of the CPU after it was paused via up_cpu_pause(),
- *  and resume normal tasking.
- *
- * Input Parameters:
- *  None
- *
- * Returned Value:
- *   On success, OK is returned.  Otherwise, a negated errno value indicating
- *   the nature of the failure is returned.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SMP
-int up_cpu_paused_restore(void);
-#endif
-
-/****************************************************************************
- * Name: up_cpu_resume
- *
- * Description:
- *   Restart the cpu after it was paused via up_cpu_pause(), restoring the
- *   state of the task at the head of the g_assignedtasks[cpu] list, and
- *   resume normal tasking.
- *
- *   This function is called after up_cpu_pause in order to resume operation
- *   of the CPU after modifying its g_assignedtasks[cpu] list.
- *
- * Input Parameters:
- *   cpu - The index of the CPU being resumed.
- *
- * Returned Value:
- *   Zero on success; a negated errno value on failure.
- *
- * Assumptions:
- *   Called from within a critical section; up_cpu_pause() must have
- *   previously been called within the same critical section.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SMP
-int up_cpu_resume(int cpu);
-#endif
-
 /****************************************************************************
  * Name: up_romgetc
  *

include/nuttx/irq.h

@@ -81,6 +81,7 @@
       SP_DMB(); \
       g_cpu_irqlock = SP_UNLOCKED; \
       SP_DSB(); \
+      SP_SEV(); \
     } \
   while (0)
 #endif