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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* hvconsole.h
* Copyright (C) 2004 Ryan S Arnold, IBM Corporation
*
* LPAR console support.
*/
#ifndef _PPC64_HVCONSOLE_H
#define _PPC64_HVCONSOLE_H
#ifdef __KERNEL__
/*
* PSeries firmware will only send/recv up to 16 bytes of character data per
* hcall.
*/
#define MAX_VIO_PUT_CHARS 16
#define SIZE_VIO_GET_CHARS 16
/*
* Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars. The 'count'
* parm is included to conform to put_chars() function pointer template
*/
extern ssize_t hvc_get_chars(uint32_t vtermno, u8 *buf, size_t count);
extern ssize_t hvc_put_chars(uint32_t vtermno, const u8 *buf, size_t count);
/* Provided by HVC VIO */
void hvc_vio_init_early(void);
#endif /* __KERNEL__ */
#endif /* _PPC64_HVCONSOLE_H */
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