| /* 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 */ |
