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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2013-08-27 21:15:02 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-09-02 13:49:29 +0100
commit6a7d2c625656df5f8ad6e33aa3d164eefb1df8dc (patch)
treed3d43dccef6c32bd8fbbb70963d222f22f623760 /arch/arm/kernel/v7m.c
parent84b6504f560157ff2077dd3757eee481b81dc39b (diff)
downloadlinux-6a7d2c625656df5f8ad6e33aa3d164eefb1df8dc.tar.bz2
ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines
The newly introduced function is to be used as .restart callback for ARMv7-M machines. The used register is architecturally defined, so it should work for all M-class machines. Acked-by: Jonathan Austin <jonathan.austin@arm.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/v7m.c')
-rw-r--r--arch/arm/kernel/v7m.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/kernel/v7m.c b/arch/arm/kernel/v7m.c
new file mode 100644
index 000000000000..4d2cba94f5cc
--- /dev/null
+++ b/arch/arm/kernel/v7m.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2013 Uwe Kleine-Koenig for Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <linux/io.h>
+#include <linux/reboot.h>
+#include <asm/barrier.h>
+#include <asm/v7m.h>
+
+void armv7m_restart(enum reboot_mode mode, const char *cmd)
+{
+ dsb();
+ __raw_writel(V7M_SCB_AIRCR_VECTKEY | V7M_SCB_AIRCR_SYSRESETREQ,
+ BASEADDR_V7M_SCB + V7M_SCB_AIRCR);
+ dsb();
+}