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include
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asm-sparc
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vaddrs.h

vaddrs.h 2.3 KB
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  1. /* $Id: vaddrs.h,v 1.27 2001/07/04 00:18:18 davem Exp $ */
    2. 

  2. #ifndef _SPARC_VADDRS_H
    3. 

  3. #define _SPARC_VADDRS_H
    4. 

  4. 

  5. #include <asm/head.h>
    6. 

  6. 

  7. /*
    8. 

  8.  * asm-sparc/vaddrs.h:  Here we define the virtual addresses at
    9. 

  9.  *                      which important things will be mapped.
    10. 

  10.  *
    11. 

  11.  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
    12. 

  12.  * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
    13. 

  13.  */
    14. 

  14. 

  15. #define SRMMU_MAXMEM		0x0c000000
    16. 

  16. 

  17. #define SRMMU_NOCACHE_VADDR	(KERNBASE + SRMMU_MAXMEM)
    18. 

  18. 				/* = 0x0fc000000 */
    19. 

  19. /* XXX Empiricals - this needs to go away - KMW */
    20. 

  20. #define SRMMU_MIN_NOCACHE_PAGES (550)
    21. 

  21. #define SRMMU_MAX_NOCACHE_PAGES	(1280)
    22. 

  22. 

  23. /* The following constant is used in mm/srmmu.c::srmmu_nocache_calcsize()
    24. 

  24.  * to determine the amount of memory that will be reserved as nocache:
    25. 

  25.  *
    26. 

  26.  * 256 pages will be taken as nocache per each
    27. 

  27.  * SRMMU_NOCACHE_ALCRATIO MB of system memory.
    28. 

  28.  *
    29. 

  29.  * limits enforced:	nocache minimum = 256 pages
    30. 

  30.  *			nocache maximum = 1280 pages
    31. 

  31.  */
    32. 

  32. #define SRMMU_NOCACHE_ALCRATIO	64	/* 256 pages per 64MB of system RAM */
    33. 

  33. 

  34. #define SUN4M_IOBASE_VADDR	0xfd000000 /* Base for mapping pages */
    35. 

  35. #define IOBASE_VADDR		0xfe000000
    36. 

  36. #define IOBASE_END		0xfe600000
    37. 

  37. 

  38. #define VMALLOC_START		0xfe600000
    39. 

  39. 

  40. /* XXX Alter this when I get around to fixing sun4c - Anton */
    41. 

  41. #define VMALLOC_END		0xffc00000
    42. 

  42. 

  43. /*
    44. 

  44.  * On the sun4/4c we need a place
    45. 

  45.  * to reliably map locked down kernel data.  This includes the
    46. 

  46.  * task_struct and kernel stack pages of each process plus the
    47. 

  47.  * scsi buffers during dvma IO transfers, also the floppy buffers
    48. 

  48.  * during pseudo dma which runs with traps off (no faults allowed).
    49. 

  49.  * Some quick calculations yield:
    50. 

  50.  *       NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
    51. 

  51.  * Subtract this from 0xc00000 and you get 0x927C0 of vm left
    52. 

  52.  * over to map SCSI dvma + floppy pseudo-dma buffers.  So be
    53. 

  53.  * careful if you change NR_TASKS or else there won't be enough
    54. 

  54.  * room for it all.
    55. 

  55.  */
    56. 

  56. #define SUN4C_LOCK_VADDR	0xff000000
    57. 

  57. #define SUN4C_LOCK_END		0xffc00000
    58. 

  58. 

  59. #define KADB_DEBUGGER_BEGVM	0xffc00000 /* Where kern debugger is in virt-mem */
    60. 

  60. #define KADB_DEBUGGER_ENDVM	0xffd00000
    61. 

  61. #define DEBUG_FIRSTVADDR	KADB_DEBUGGER_BEGVM
    62. 

  62. #define DEBUG_LASTVADDR		KADB_DEBUGGER_ENDVM
    63. 

  63. 

  64. #define LINUX_OPPROM_BEGVM	0xffd00000
    65. 

  65. #define LINUX_OPPROM_ENDVM	0xfff00000
    66. 

  66. 

  67. #define DVMA_VADDR		0xfff00000 /* Base area of the DVMA on suns */
    68. 

  68. #define DVMA_END		0xfffc0000
    69. 

  69. 

  70. #endif /* !(_SPARC_VADDRS_H) */
    71.