lscreen.h 2.6 KB

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  1. /*
  2. * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
  3. * The President and Fellows of Harvard College.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions
  7. * are met:
  8. * 1. Redistributions of source code must retain the above copyright
  9. * notice, this list of conditions and the following disclaimer.
  10. * 2. Redistributions in binary form must reproduce the above copyright
  11. * notice, this list of conditions and the following disclaimer in the
  12. * documentation and/or other materials provided with the distribution.
  13. * 3. Neither the name of the University nor the names of its contributors
  14. * may be used to endorse or promote products derived from this software
  15. * without specific prior written permission.
  16. *
  17. * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
  18. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20. * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
  21. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27. * SUCH DAMAGE.
  28. */
  29. #ifndef _LAMEBUS_LSCREEN_H_
  30. #define _LAMEBUS_LSCREEN_H_
  31. /*
  32. * Hardware device data for memory-mapped fullscreen text console.
  33. */
  34. struct lscreen_softc {
  35. /* Initialized by config function */
  36. struct spinlock ls_lock; // protects data and device regs
  37. unsigned ls_width, ls_height; // screen size
  38. unsigned ls_cx, ls_cy; // cursor position
  39. char *ls_screen; // memory-mapped screen buffer
  40. /* Initialized by lower-level attachment function */
  41. void *ls_busdata; // bus we're on
  42. uint32_t ls_buspos; // position on that bus
  43. /* Initialized by higher-level attachment function */
  44. void *ls_devdata; // data and functions for
  45. void (*ls_start)(void *devdata); // upper device (perhaps
  46. void (*ls_input)(void *devdata, int ch); // console)
  47. };
  48. /* Functions called by lower-level drivers */
  49. void lscreen_irq(/*struct lser_softc*/ void *sc); // interrupt handler
  50. /* Functions called by higher-level drivers */
  51. void lscreen_write(/*struct lser_softc*/ void *sc, int ch); // output function
  52. #endif /* _LAMEBUS_LSCREEN_H_ */