arch/powerpc/include/asm/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  * PSeries firmware will only send/recv up to 16 bytes of character data per
  28  * hcall.
  29  */
  30 #define MAX_VIO_PUT_CHARS       16
  31 #define SIZE_VIO_GET_CHARS      16
  32
  33 /*
  34  * Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars.  The 'count'
  35  * parm is included to conform to put_chars() function pointer template
  36  */
  37 extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
  38 extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
  39
  40 #endif /* __KERNEL__ */
  41 #endif /* _PPC64_HVCONSOLE_H */