[linux-2.6-block.git] / arch / sh / mm / asids-debugfs.c

/*
 * debugfs ops for process ASIDs
 *
 *  Copyright (C) 2000, 2001  Paolo Alberelli
 *  Copyright (C) 2003 - 2008  Paul Mundt
 *  Copyright (C) 2003, 2004  Richard Curnow
 *
 * Provides a debugfs file that lists out the ASIDs currently associated
 * with the processes.
 *
 * In the SH-5 case, if the DM.PC register is examined through the debug
 * link, this shows ASID + PC. To make use of this, the PID->ASID
 * relationship needs to be known. This is primarily for debugging.
 *
 * 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.
 */
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/sched/signal.h>
#include <linux/sched/task.h>

#include <asm/processor.h>
#include <asm/mmu_context.h>

static int asids_debugfs_show(struct seq_file *file, void *iter)
{
	struct task_struct *p;

	read_lock(&tasklist_lock);

	for_each_process(p) {
		int pid = p->pid;

		if (unlikely(!pid))
			continue;

		if (p->mm)
			seq_printf(file, "%5d : %04lx\n", pid,
				   cpu_asid(smp_processor_id(), p->mm));
	}

	read_unlock(&tasklist_lock);

	return 0;
}

DEFINE_SHOW_ATTRIBUTE(asids_debugfs);

static int __init asids_debugfs_init(void)
{
	debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, NULL,
			    &asids_debugfs_fops);
	return 0;
}
device_initcall(asids_debugfs_init);
Commit	Line	Data
a99d6fde PM	1	/*
	2	* debugfs ops for process ASIDs
	3	*
	4	* Copyright (C) 2000, 2001 Paolo Alberelli
	5	* Copyright (C) 2003 - 2008 Paul Mundt
	6	* Copyright (C) 2003, 2004 Richard Curnow
	7	*
	8	* Provides a debugfs file that lists out the ASIDs currently associated
	9	* with the processes.
	10	*
	11	* In the SH-5 case, if the DM.PC register is examined through the debug
	12	* link, this shows ASID + PC. To make use of this, the PID->ASID
	13	* relationship needs to be known. This is primarily for debugging.
	14	*
	15	* This file is subject to the terms and conditions of the GNU General Public
	16	* License. See the file "COPYING" in the main directory of this archive
	17	* for more details.
	18	*/
	19	#include <linux/init.h>
a99d6fde PM	20	#include <linux/debugfs.h>
	21	#include <linux/seq_file.h>
	22	#include <linux/spinlock.h>
3f07c014	23	#include <linux/sched/signal.h>
29930025	24	#include <linux/sched/task.h>
3f07c014	25
a99d6fde PM	26	#include <asm/processor.h>
	27	#include <asm/mmu_context.h>
	28
a1153636	29	static int asids_debugfs_show(struct seq_file file, void iter)
a99d6fde PM	30	{
	31	struct task_struct *p;
	32
	33	read_lock(&tasklist_lock);
	34
	35	for_each_process(p) {
	36	int pid = p->pid;
	37
	38	if (unlikely(!pid))
	39	continue;
	40
	41	if (p->mm)
3a3b311c	42	seq_printf(file, "%5d : %04lx\n", pid,
a99d6fde	43	cpu_asid(smp_processor_id(), p->mm));
a99d6fde PM	44	}
	45
	46	read_unlock(&tasklist_lock);
	47
	48	return 0;
	49	}
	50
a1153636	51	DEFINE_SHOW_ATTRIBUTE(asids_debugfs);
a99d6fde PM	52
	53	static int __init asids_debugfs_init(void)
	54	{
03eb2a08 GKH	55	debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, NULL,
	56	&asids_debugfs_fops);
	57	return 0;
a99d6fde	58	}
f15412aa	59	device_initcall(asids_debugfs_init);