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/oskit/x86/pc/debug.h

https://bitbucket.org/mischief/oskit
C Header | 65 lines | 29 code | 17 blank | 19 comment | 1 complexity | cf068a62b579ea96c83d2355e72c7229 MD5 | raw file
Possible License(s): GPL-2.0 
    

  1. /*
    2. 

  2.  * Copyright (c) 1994-1995, 1998 University of Utah and the Flux Group.
    3. 

  3.  * All rights reserved.
    4. 

  4.  * 
    5. 

  5.  * This file is part of the Flux OSKit.  The OSKit is free software, also known
    6. 

  6.  * as "open source;" you can redistribute it and/or modify it under the terms
    7. 

  7.  * of the GNU General Public License (GPL), version 2, as published by the Free
    8. 

  8.  * Software Foundation (FSF).  To explore alternate licensing terms, contact
    9. 

  9.  * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
    10. 

  10.  * 
    11. 

  11.  * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
    12. 

  12.  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    13. 

  13.  * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
    14. 

  14.  * received a copy of the GPL along with the OSKit; see the file COPYING.  If
    15. 

  15.  * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
    16. 

  16.  */
    17. 

  17. #ifndef _KUKM_I386_PC_DEBUG_H_
    18. 

  18. #define _KUKM_I386_PC_DEBUG_H_
    19. 

  19. 

  20. #ifdef ASSEMBLER
    21. 

  21. #ifdef DEBUG
    22. 

  22. 

  23. 

  24. /* Poke a character directly onto the VGA text display,
    25. 

  25.    as a very quick, mostly-reliable status indicator.
    26. 

  26.    Assumes ss is a kernel data segment register.  */
    27. 

  27. #define POKE_STATUS(char,scratch)		\
    28. 

  28. 	ss/*XXX gas bug */			;\
    29. 

  29. 	movl	%ss:_phys_mem_va,scratch	;\
    30. 

  30. 	addl	$0xb8000+80*2*13+40*2,scratch	;\
    31. 

  31. 	movb	char,%ss:(scratch)		;\
    32. 

  32. 	movb	$0xf0,%ss:1(scratch)
    33. 

  33. 

  34. 

  35. #else !DEBUG
    36. 

  36. 

  37. #define POKE_STATUS(char,scratch)
    38. 

  38. 

  39. #endif !DEBUG
    40. 

  40. #else !ASSEMBLER
    41. 

  41. #ifdef DEBUG
    42. 

  42. 

  43. #include <mach/machine/vm_types.h>
    44. 

  44. 

  45. 

  46. #define POKE_STATUS(string)						\
    47. 

  47. 	({	unsigned char *s = (string);				\
    48. 

  48. 		extern oskit_addr_t phys_mem_va;				\
    49. 

  49. 		short *d = (short*)(phys_mem_va+0xb8000+80*2*13+40*2);	\
    50. 

  50. 		while (*s) { (*d++) = 0x3000 | (*s++); }		\
    51. 

  51. 		*d = ' ';						\
    52. 

  52. 	})
    53. 

  53. 

  54. 

  55. #else !DEBUG
    56. 

  56. 

  57. #define POKE_STATUS(char)
    58. 

  58. 

  59. #endif !DEBUG
    60. 

  60. #endif !ASSEMBLER
    61. 

  61. 

  62. 

  63. #include_next "debug.h"
    64. 

  64. 

  65. #endif _KUKM_I386_PC_DEBUG_H_
    66. 

  66.