File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/mips/sgi-ip27/ip27-reset.c b/arch/mips/sgi-ip27/ip27-reset.c
new file mode 100644
index 0000000..e44a15d
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-reset.c
@@ -0,0 +1,81 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Reset an IP27.
+ *
+ * Copyright (C) 1997, 1998, 1999, 2000, 06 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ */
+#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/smp.h>
+#include <linux/mmzone.h>
+#include <linux/nodemask.h>
+#include <linux/pm.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+#include <asm/sgialib.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/gda.h>
+#include <asm/sn/sn0/hub.h>
+
+void machine_restart(char *command) __noreturn;
+void machine_halt(void) __noreturn;
+void machine_power_off(void) __noreturn;
+
+#define noreturn while(1); /* Silence gcc. */
+
+/* XXX How to pass the reboot command to the firmware??? */
+static void ip27_machine_restart(char *command)
+{
+#if 0
+ int i;
+#endif
+
+ printk("Reboot started from CPU %d\n", smp_processor_id());
+#ifdef CONFIG_SMP
+ smp_send_stop();
+#endif
+#if 0
+ for_each_online_node(i)
+ REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
+ PROMOP_REBOOT);
+#else
+ LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
+#endif
+ noreturn;
+}
+
+static void ip27_machine_halt(void)
+{
+ int i;
+
+#ifdef CONFIG_SMP
+ smp_send_stop();
+#endif
+ for_each_online_node(i)
+ REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
+ PROMOP_RESTART);
+ LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
+ noreturn;
+}
+
+static void ip27_machine_power_off(void)
+{
+ /* To do ... */
+ noreturn;
+}
+
+void ip27_reboot_setup(void)
+{
+ _machine_restart = ip27_machine_restart;
+ _machine_halt = ip27_machine_halt;
+ pm_power_off = ip27_machine_power_off;
+}