arch: x86: Add hlt instruction to save power in qemu_idle.c

2020-05-04 17:28:42 +09:00 · 2020-05-04 17:28:42 +09:00 · 11bbe3997e
parent cd8492b612
commit 11bbe3997e
1 changed files with 2 additions and 0 deletions
--- a/arch/x86/src/qemu/qemu_idle.c
+++ b/arch/x86/src/qemu/qemu_idle.c
@ -83,5 +83,7 @@ void up_idle(void)

  /* Sleep until an interrupt occurs to save power */

+  __asm__ __volatile__ ("hlt");
+
 #endif
 }