LXR linux/arch/powerpc/include/asm/hvconsole.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * hvconsole.h
   4 * Copyright (C) 2004 Ryan S Arnold, IBM Corporation
   5 *
   6 * LPAR console support.
   7 */
   8
   9#ifndef _PPC64_HVCONSOLE_H
  10#define _PPC64_HVCONSOLE_H
  11#ifdef __KERNEL__
  12
  13/*
  14 * PSeries firmware will only send/recv up to 16 bytes of character data per
  15 * hcall.
  16 */
  17#define MAX_VIO_PUT_CHARS       16
  18#define SIZE_VIO_GET_CHARS      16
  19
  20/*
  21 * Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars.  The 'count'
  22 * parm is included to conform to put_chars() function pointer template
  23 */
  24extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
  25extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
  26
  27/* Provided by HVC VIO */
  28void hvc_vio_init_early(void);
  29
  30#endif /* __KERNEL__ */
  31#endif /* _PPC64_HVCONSOLE_H */
  32