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SPEAr
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overview.txt

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  1. 			SPEAr ARM Linux Overview
    2. 

  2. 			==========================
    3. 

  3. 

  4. Introduction
    5. 

  5. ------------
    6. 

  6. 

  7.   SPEAr (Structured Processor Enhanced Architecture).
    8. 

  8.   weblink : http://www.st.com/spear
    9. 

  9. 

  10.   The ST Microelectronics SPEAr range of ARM9/CortexA9 System-on-Chip CPUs are
    11. 

  11.   supported by the 'spear' platform of ARM Linux. Currently SPEAr1310,
    12. 

  12.   SPEAr1340, SPEAr300, SPEAr310, SPEAr320 and SPEAr600 SOCs are supported.
    13. 

  13. 

  14.   Hierarchy in SPEAr is as follows:
    15. 

  15. 

  16.   SPEAr (Platform)
    17. 

  17. 	- SPEAr3XX (3XX SOC series, based on ARM9)
    18. 

  18. 		- SPEAr300 (SOC)
    19. 

  19. 			- SPEAr300 Evaluation Board
    20. 

  20. 		- SPEAr310 (SOC)
    21. 

  21. 			- SPEAr310 Evaluation Board
    22. 

  22. 		- SPEAr320 (SOC)
    23. 

  23. 			- SPEAr320 Evaluation Board
    24. 

  24. 	- SPEAr6XX (6XX SOC series, based on ARM9)
    25. 

  25. 		- SPEAr600 (SOC)
    26. 

  26. 			- SPEAr600 Evaluation Board
    27. 

  27. 	- SPEAr13XX (13XX SOC series, based on ARM CORTEXA9)
    28. 

  28. 		- SPEAr1310 (SOC)
    29. 

  29. 			- SPEAr1310 Evaluation Board
    30. 

  30. 		- SPEAr1340 (SOC)
    31. 

  31. 			- SPEAr1340 Evaluation Board
    32. 

  32. 

  33.   Configuration
    34. 

  34.   -------------
    35. 

  35. 

  36.   A generic configuration is provided for each machine, and can be used as the
    37. 

  37.   default by
    38. 

  38. 	make spear13xx_defconfig
    39. 

  39. 	make spear3xx_defconfig
    40. 

  40. 	make spear6xx_defconfig
    41. 

  41. 

  42.   Layout
    43. 

  43.   ------
    44. 

  44. 

  45.   The common files for multiple machine families (SPEAr3xx, SPEAr6xx and
    46. 

  46.   SPEAr13xx) are located in the platform code contained in arch/arm/plat-spear
    47. 

  47.   with headers in plat/.
    48. 

  48. 

  49.   Each machine series have a directory with name arch/arm/mach-spear followed by
    50. 

  50.   series name. Like mach-spear3xx, mach-spear6xx and mach-spear13xx.
    51. 

  51. 

  52.   Common file for machines of spear3xx family is mach-spear3xx/spear3xx.c, for
    53. 

  53.   spear6xx is mach-spear6xx/spear6xx.c and for spear13xx family is
    54. 

  54.   mach-spear13xx/spear13xx.c. mach-spear* also contain soc/machine specific
    55. 

  55.   files, like spear1310.c, spear1340.c spear300.c, spear310.c, spear320.c and
    56. 

  56.   spear600.c.  mach-spear* doesn't contains board specific files as they fully
    57. 

  57.   support Flattened Device Tree.
    58. 

  58. 

  59. 

  60.   Document Author
    61. 

  61.   ---------------
    62. 

  62. 

  63.   Viresh Kumar <vireshk@kernel.org>, (c) 2010-2012 ST Microelectronics
    64.