svn commit: r286134 - head/sys/arm64/arm64

[Andrew Turner]

Author: andrew
Date: Fri Jul 31 15:54:34 2015
New Revision: 286134
URL: https://svnweb.freebsd.org/changeset/base/286134

Log:
  Try to put the CPU into a low power state if we failed to otherwise halt
  the system.
  
  Obtained from:	ABT Systems Ltd
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/arm64/arm64/machdep.c

Modified: head/sys/arm64/arm64/machdep.c
==============================================================================
--- head/sys/arm64/arm64/machdep.c	Fri Jul 31 15:32:32 2015	(r286133)
+++ head/sys/arm64/arm64/machdep.c	Fri Jul 31 15:54:34 2015	(r286134)
@@ -376,7 +376,11 @@ void
 cpu_halt(void)
 {
 
-	panic("ARM64TODO: cpu_halt");
+	/* We should have shutdown by now, if not enter a low power sleep */
+	intr_disable();
+	while (1) {
+		__asm __volatile("wfi");
+	}
 }
 
 /*