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 ssize_t hvc_get_chars(uint32_t vtermno, u8 *buf, size_t count);
25extern ssize_t hvc_put_chars(uint32_t vtermno, const u8 *buf, size_t count);
26
27/* Provided by HVC VIO */
28void hvc_vio_init_early(void);
29
30#endif /* __KERNEL__ */
31#endif /* _PPC64_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 */