hvc_console.h 2.2 KB

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  1. /*
  2. * hvc_console.h
  3. * Copyright (C) 2005 IBM Corporation
  4. *
  5. * Author(s):
  6. * Ryan S. Arnold <rsa@us.ibm.com>
  7. *
  8. * hvc_console header information:
  9. * moved here from include/asm-powerpc/hvconsole.h
  10. * and drivers/char/hvc_console.c
  11. *
  12. * This program is free software; you can redistribute it and/or modify
  13. * it under the terms of the GNU General Public License as published by
  14. * the Free Software Foundation; either version 2 of the License, or
  15. * (at your option) any later version.
  16. *
  17. * This program is distributed in the hope that it will be useful,
  18. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20. * GNU General Public License for more details.
  21. *
  22. * You should have received a copy of the GNU General Public License
  23. * along with this program; if not, write to the Free Software
  24. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25. */
  26. #ifndef HVC_CONSOLE_H
  27. #define HVC_CONSOLE_H
  28. /*
  29. * This is the max number of console adapters that can/will be found as
  30. * console devices on first stage console init. Any number beyond this range
  31. * can't be used as a console device but is still a valid tty device.
  32. */
  33. #define MAX_NR_HVC_CONSOLES 16
  34. /*
  35. * The Linux TTY code does not support dynamic addition of tty derived devices
  36. * so we need to know how many tty devices we might need when space is allocated
  37. * for the tty device. Since this driver supports hotplug of vty adapters we
  38. * need to make sure we have enough allocated.
  39. */
  40. #define HVC_ALLOC_TTY_ADAPTERS 8
  41. /* implemented by a low level driver */
  42. struct hv_ops {
  43. int (*get_chars)(uint32_t vtermno, char *buf, int count);
  44. int (*put_chars)(uint32_t vtermno, const char *buf, int count);
  45. };
  46. struct hvc_struct;
  47. /* Register a vterm and a slot index for use as a console (console_init) */
  48. extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops);
  49. /* register a vterm for hvc tty operation (module_init or hotplug add) */
  50. extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq,
  51. struct hv_ops *ops, int outbuf_size);
  52. /* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */
  53. extern int __devexit hvc_remove(struct hvc_struct *hp);
  54. #endif // HVC_CONSOLE_H