2 * linux/arch/arm/kernel/iwmmxt-notifier.c
4 * XScale iWMMXt (Concan) context switching and handling
7 * Copyright (c) 2003, Intel Corporation
9 * Full lazy switching support, optimizations and more, by Nicolas Pitre
10 * Copyright (c) 2003-2004, MontaVista Software, Inc.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/module.h>
18 #include <linux/config.h>
19 #include <linux/types.h>
20 #include <linux/kernel.h>
21 #include <linux/signal.h>
22 #include <linux/sched.h>
23 #include <linux/init.h>
24 #include <asm/thread_notify.h>
27 static int iwmmxt_do(struct notifier_block *self, unsigned long cmd, void *t)
29 struct thread_info *thread = t;
32 case THREAD_NOTIFY_FLUSH:
34 * flush_thread() zeroes thread->fpstate, so no need
35 * to do anything here.
37 * FALLTHROUGH: Ensure we don't try to overwrite our newly
38 * initialised state information on the first fault.
41 case THREAD_NOTIFY_RELEASE:
42 iwmmxt_task_release(thread);
45 case THREAD_NOTIFY_SWITCH:
46 iwmmxt_task_switch(thread);
53 static struct notifier_block iwmmxt_notifier_block = {
54 .notifier_call = iwmmxt_do,
57 static int __init iwmmxt_init(void)
59 thread_register_notifier(&iwmmxt_notifier_block);
64 late_initcall(iwmmxt_init);