tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * hvconsole.h
3 * Copyright (C) 2004 Ryan S Arnold, IBM Corporation
4 *
5 * LPAR console support.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef _PPC64_HVCONSOLE_H
23#define _PPC64_HVCONSOLE_H
24
25/*
26 * This is the max number of console adapters that can/will be found as
27 * console devices on first stage console init. Any number beyond this range
28 * can't be used as a console device but is still a valid tty device.
29 */
30#define MAX_NR_HVC_CONSOLES 16
31
32/* implemented by a low level driver */
33struct hv_ops {
34 int (*get_chars)(uint32_t vtermno, char *buf, int count);
35 int (*put_chars)(uint32_t vtermno, const char *buf, int count);
36};
37extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
38extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
39
40struct hvc_struct;
41
42/* Register a vterm and a slot index for use as a console (console_init) */
43extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops);
44/* register a vterm for hvc tty operation (module_init or hotplug add) */
45extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq,
46 struct hv_ops *ops);
47/* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */
48extern int __devexit hvc_remove(struct hvc_struct *hp);
49#endif /* _PPC64_HVCONSOLE_H */