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| 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 | */ |
| 24 | extern ssize_t hvc_get_chars(uint32_t vtermno, u8 *buf, size_t count); |
| 25 | extern ssize_t hvc_put_chars(uint32_t vtermno, const u8 *buf, size_t count); |
| 26 | |
| 27 | /* Provided by HVC VIO */ |
| 28 | void hvc_vio_init_early(void); |
| 29 | |
| 30 | #endif /* __KERNEL__ */ |
| 31 | #endif /* _PPC64_HVCONSOLE_H */ |
| 32 |
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