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linux-vybrid_pu...
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ppc
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syslib
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ibm440sp_common.c

ibm440sp_common.c 1.7 KB
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  1. /*
    2. 

  2.  * PPC440SP/PPC440SPe system library
    3. 

  3.  *
    4. 

  4.  * Matt Porter <mporter@kernel.crashing.org>
    5. 

  5.  * Copyright 2002-2005 MontaVista Software Inc.
    6. 

  6.  *
    7. 

  7.  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
    8. 

  8.  * Copyright (c) 2003, 2004 Zultys Technologies
    9. 

  9.  *
    10. 

  10.  * This program is free software; you can redistribute  it and/or modify it
    11. 

  11.  * under  the terms of  the GNU General  Public License as published by the
    12. 

  12.  * Free Software Foundation;  either version 2 of the  License, or (at your
    13. 

  13.  * option) any later version.
    14. 

  14.  *
    15. 

  15.  */
    16. 

  16. #include <linux/types.h>
    17. 

  17. #include <linux/serial.h>
    18. 

  18. 

  19. #include <asm/param.h>
    20. 

  20. #include <asm/ibm44x.h>
    21. 

  21. #include <asm/mmu.h>
    22. 

  22. #include <asm/machdep.h>
    23. 

  23. #include <asm/time.h>
    24. 

  24. #include <asm/ppc4xx_pic.h>
    25. 

  25. 

  26. /*
    27. 

  27.  * Read the 440SP memory controller to get size of system memory.
    28. 

  28.  */
    29. 

  29. unsigned long __init ibm440sp_find_end_of_memory(void)
    30. 

  30. {
    31. 

  31. 	u32 i;
    32. 

  32. 	u32 mem_size = 0;
    33. 

  33. 

  34. 	/* Read two bank sizes and sum */
    35. 

  35. 	for (i=0; i< MQ0_NUM_BANKS; i++)
    36. 

  36. 		switch (mfdcr(DCRN_MQ0_BS0BAS + i) & MQ0_CONFIG_SIZE_MASK) {
    37. 

  37. 			case MQ0_CONFIG_SIZE_8M:
    38. 

  38. 				mem_size += PPC44x_MEM_SIZE_8M;
    39. 

  39. 				break;
    40. 

  40. 			case MQ0_CONFIG_SIZE_16M:
    41. 

  41. 				mem_size += PPC44x_MEM_SIZE_16M;
    42. 

  42. 				break;
    43. 

  43. 			case MQ0_CONFIG_SIZE_32M:
    44. 

  44. 				mem_size += PPC44x_MEM_SIZE_32M;
    45. 

  45. 				break;
    46. 

  46. 			case MQ0_CONFIG_SIZE_64M:
    47. 

  47. 				mem_size += PPC44x_MEM_SIZE_64M;
    48. 

  48. 				break;
    49. 

  49. 			case MQ0_CONFIG_SIZE_128M:
    50. 

  50. 				mem_size += PPC44x_MEM_SIZE_128M;
    51. 

  51. 				break;
    52. 

  52. 			case MQ0_CONFIG_SIZE_256M:
    53. 

  53. 				mem_size += PPC44x_MEM_SIZE_256M;
    54. 

  54. 				break;
    55. 

  55. 			case MQ0_CONFIG_SIZE_512M:
    56. 

  56. 				mem_size += PPC44x_MEM_SIZE_512M;
    57. 

  57. 				break;
    58. 

  58. 			case MQ0_CONFIG_SIZE_1G:
    59. 

  59. 				mem_size += PPC44x_MEM_SIZE_1G;
    60. 

  60. 				break;
    61. 

  61. 			case MQ0_CONFIG_SIZE_2G:
    62. 

  62. 				mem_size += PPC44x_MEM_SIZE_2G;
    63. 

  63. 				break;
    64. 

  64. 			default:
    65. 

  65. 				break;
    66. 

  66. 		}
    67. 

  67. 	return mem_size;
    68. 

  68. }
    69.