diff options
Diffstat (limited to 'arch/powerpc/include/asm/hvconsole.h')
| -rw-r--r-- | arch/powerpc/include/asm/hvconsole.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hvconsole.h b/arch/powerpc/include/asm/hvconsole.h new file mode 100644 index 0000000000..ccb2034506 --- /dev/null +++ b/arch/powerpc/include/asm/hvconsole.h @@ -0,0 +1,31 @@ +/* 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 int hvc_get_chars(uint32_t vtermno, char *buf, int count); +extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count); + +/* Provided by HVC VIO */ +void hvc_vio_init_early(void); + +#endif /* __KERNEL__ */ +#endif /* _PPC64_HVCONSOLE_H */ |