1/*
 2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
 3 *
 4 *   This program is free software; you can redistribute it and/or
 5 *   modify it under the terms of the GNU General Public License
 6 *   as published by the Free Software Foundation, version 2.
 7 *
 8 *   This program is distributed in the hope that it will be useful, but
 9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 *
14 * Provide methods for the HARDWALL_FILE for accessing the UDN.
15 */
16
17#ifndef _ASM_TILE_HARDWALL_H
18#define _ASM_TILE_HARDWALL_H
19
20#include <linux/ioctl.h>
21
22#define HARDWALL_IOCTL_BASE 0xa2
23
24/*
25 * The HARDWALL_CREATE() ioctl is a macro with a "size" argument.
26 * The resulting ioctl value is passed to the kernel in conjunction
27 * with a pointer to a little-endian bitmask of cpus, which must be
28 * physically in a rectangular configuration on the chip.
29 * The "size" is the number of bytes of cpu mask data.
30 */
31#define _HARDWALL_CREATE 1
32#define HARDWALL_CREATE(size) \
33  _IOC(_IOC_READ, HARDWALL_IOCTL_BASE, _HARDWALL_CREATE, (size))
34
35#define _HARDWALL_ACTIVATE 2
36#define HARDWALL_ACTIVATE \
37  _IO(HARDWALL_IOCTL_BASE, _HARDWALL_ACTIVATE)
38
39#define _HARDWALL_DEACTIVATE 3
40#define HARDWALL_DEACTIVATE \
41 _IO(HARDWALL_IOCTL_BASE, _HARDWALL_DEACTIVATE)
42
43#define _HARDWALL_GET_ID 4
44#define HARDWALL_GET_ID \
45 _IO(HARDWALL_IOCTL_BASE, _HARDWALL_GET_ID)
46
47#ifndef __KERNEL__
48
49/* This is the canonical name expected by userspace. */
50#define HARDWALL_FILE "/dev/hardwall"
51
52#else
53
54/* /proc hooks for hardwall. */
55struct proc_dir_entry;
56#ifdef CONFIG_HARDWALL
57void proc_tile_hardwall_init(struct proc_dir_entry *root);
58int proc_pid_hardwall(struct task_struct *task, char *buffer);
59#else
60static inline void proc_tile_hardwall_init(struct proc_dir_entry *root) {}
61#endif
62
63#endif
64
65#endif /* _ASM_TILE_HARDWALL_H */