2 * pseries CPU Hotplug infrastructure.
4 * Split out from arch/powerpc/kernel/rtas.c
6 * Peter Bergner, IBM March 2001.
7 * Copyright (C) 2001 IBM.
9 * Copyright (C) 2006 Michael Ellerman, IBM Corporation
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/delay.h>
19 #include <linux/cpu.h>
20 #include <asm/system.h>
23 #include <asm/firmware.h>
24 #include <asm/machdep.h>
25 #include <asm/vdso_datapage.h>
26 #include <asm/pSeries_reconfig.h>
29 /* This version can't take the spinlock, because it never returns */
30 static struct rtas_args rtas_stop_self_args = {
31 .token = RTAS_UNKNOWN_SERVICE,
34 .rets = &rtas_stop_self_args.args[0],
37 void rtas_stop_self(void)
39 struct rtas_args *args = &rtas_stop_self_args;
43 BUG_ON(args->token == RTAS_UNKNOWN_SERVICE);
45 printk("cpu %u (hwid %u) Ready to die...\n",
46 smp_processor_id(), hard_smp_processor_id());
47 enter_rtas(__pa(args));
49 panic("Alas, I survived.\n");
52 static int __init pseries_cpu_hotplug_init(void)
54 rtas_stop_self_args.token = rtas_token("stop-self");
58 arch_initcall(pseries_cpu_hotplug_init);