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Posted to commits@nuttx.apache.org by gn...@apache.org on 2020/05/04 13:13:41 UTC

[incubator-nuttx] 02/04: arch: x86: Add hlt instruction to save power in qemu_idle.c

This is an automated email from the ASF dual-hosted git repository.

gnutt pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git

commit 11bbe3997eebc2c295b562cc264ab68f75a3b7af
Author: Masayuki Ishikawa <ma...@gmail.com>
AuthorDate: Mon May 4 17:28:42 2020 +0900

    arch: x86: Add hlt instruction to save power in qemu_idle.c
---
 arch/x86/src/qemu/qemu_idle.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/src/qemu/qemu_idle.c b/arch/x86/src/qemu/qemu_idle.c
index c1c9cb8..630fd44 100644
--- 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
 }