11a59d1b8SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 2b8b572e1SStephen Rothwell /* 3b8b572e1SStephen Rothwell * hvconsole.h 4b8b572e1SStephen Rothwell * Copyright (C) 2004 Ryan S Arnold, IBM Corporation 5b8b572e1SStephen Rothwell * 6b8b572e1SStephen Rothwell * LPAR console support. 7b8b572e1SStephen Rothwell */ 8b8b572e1SStephen Rothwell 9b8b572e1SStephen Rothwell #ifndef _PPC64_HVCONSOLE_H 10b8b572e1SStephen Rothwell #define _PPC64_HVCONSOLE_H 11b8b572e1SStephen Rothwell #ifdef __KERNEL__ 12b8b572e1SStephen Rothwell 13b8b572e1SStephen Rothwell /* 14b8b572e1SStephen Rothwell * PSeries firmware will only send/recv up to 16 bytes of character data per 15b8b572e1SStephen Rothwell * hcall. 16b8b572e1SStephen Rothwell */ 17b8b572e1SStephen Rothwell #define MAX_VIO_PUT_CHARS 16 18b8b572e1SStephen Rothwell #define SIZE_VIO_GET_CHARS 16 19b8b572e1SStephen Rothwell 20b8b572e1SStephen Rothwell /* 21b8b572e1SStephen Rothwell * Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars. The 'count' 22b8b572e1SStephen Rothwell * parm is included to conform to put_chars() function pointer template 23b8b572e1SStephen Rothwell */ 24b8b572e1SStephen Rothwell extern int hvc_get_chars(uint32_t vtermno, char *buf, int count); 25b8b572e1SStephen Rothwell extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count); 26b8b572e1SStephen Rothwell 27*13b8219bSLee Jones /* Provided by HVC VIO */ 28*13b8219bSLee Jones void hvc_vio_init_early(void); 29*13b8219bSLee Jones 30b8b572e1SStephen Rothwell #endif /* __KERNEL__ */ 31b8b572e1SStephen Rothwell #endif /* _PPC64_HVCONSOLE_H */ 32