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riscv: Use wfi instruction for idle task

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Update #3433.
This commit is contained in:
Sebastian Huber
2018-07-20 09:07:40 +02:00
parent f5fd8eb9e3
commit c2670deb49
2 changed files with 3 additions and 12 deletions
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5
cpukit/score/cpu/riscv/cpu.c
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@@ -204,8 +204,9 @@ uint32_t _CPU_ISR_Get_level( void )
void *_CPU_Thread_Idle_body( uintptr_t ignored ) void *_CPU_Thread_Idle_body( uintptr_t ignored )
{ {
do { while ( true ) {
} while (1); __asm__ volatile ( "wfi" );
}
return NULL; return NULL;
} }

10
cpukit/score/cpu/riscv/include/rtems/score/cpu.h
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@@ -360,16 +360,6 @@ void _CPU_Initialize(
void void
); );
/*
* _CPU_Thread_Idle_body
*
* This routine is the CPU dependent IDLE thread body.
*
* NOTE: It need only be provided if CPU_PROVIDES_IDLE_THREAD_BODY
* is TRUE.
*
*/
void *_CPU_Thread_Idle_body( uintptr_t ignored ); void *_CPU_Thread_Idle_body( uintptr_t ignored );
/* /*