include/asm-powerpc/hvconsole.h

   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 #ifdef __KERNEL__
  25
  26 /*
  27  * This is the max number of console adapters that can/will be found as
  28  * console devices on first stage console init.  Any number beyond this range
  29  * can't be used as a console device but is still a valid tty device.
  30  */
  31 #define MAX_NR_HVC_CONSOLES     16
  32
  33 /* implemented by a low level driver */
  34 struct hv_ops {
  35         int (*get_chars)(uint32_t vtermno, char *buf, int count);
  36         int (*put_chars)(uint32_t vtermno, const char *buf, int count);
  37 };
  38 extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
  39 extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
  40
  41 struct hvc_struct;
  42
  43 /* Register a vterm and a slot index for use as a console (console_init) */
  44 extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops);
  45 /* register a vterm for hvc tty operation (module_init or hotplug add) */
  46 extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq,
  47                                                  struct hv_ops *ops);
  48 /* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */
  49 extern int __devexit hvc_remove(struct hvc_struct *hp);
  50 #endif /* __KERNEL__ */
  51 #endif /* _PPC64_HVCONSOLE_H */