[src/trunk]: src/sys/arch/aarch64/aarch64 Invalidate dcache before polling AP...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3d7e2086404f
branches:  trunk
changeset: 464750:3d7e2086404f
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Oct 20 11:17:41 2019 +0000

description:
Invalidate dcache before polling AP hatched status

diffstat:

 sys/arch/aarch64/aarch64/cpu.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 1992f2a0804b -r 3d7e2086404f sys/arch/aarch64/aarch64/cpu.c
--- a/sys/arch/aarch64/aarch64/cpu.c    Sun Oct 20 09:41:53 2019 +0000
+++ b/sys/arch/aarch64/aarch64/cpu.c    Sun Oct 20 11:17:41 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.c,v 1.23 2019/10/19 18:04:26 jmcneill Exp $ */
+/* $NetBSD: cpu.c,v 1.24 2019/10/20 11:17:41 jmcneill Exp $ */
 
 /*
  * Copyright (c) 2017 Ryo Shimizu <ryo%nerv.org@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: cpu.c,v 1.23 2019/10/19 18:04:26 jmcneill Exp $");
+__KERNEL_RCSID(1, "$NetBSD: cpu.c,v 1.24 2019/10/20 11:17:41 jmcneill Exp $");
 
 #include "locators.h"
 #include "opt_arm_debug.h"
@@ -571,7 +571,7 @@
 bool
 cpu_hatched_p(u_int cpuindex)
 {
-       membar_consumer();
+       aarch64_dcache_inv_range((vaddr_t)&aarch64_cpu_mbox[cpuindex], 4);
        return (aarch64_cpu_mbox[cpuindex] & CPU_MBOX_HATCHED) != 0;
 }
 #endif /* MULTIPROCESSOR */