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========================
SPEAr ARM Linux Overview
========================
Introduction
------------
SPEAr (Structured Processor Enhanced Architecture).
weblink : http://www.st.com/spear
The ST Microelectronics SPEAr range of ARM9/CortexA9 System-on-Chip CPUs are
supported by the 'spear' platform of ARM Linux. Currently SPEAr1310,
SPEAr1340, SPEAr300, SPEAr310, SPEAr320 and SPEAr600 SOCs are supported.
Hierarchy in SPEAr is as follows:
SPEAr (Platform)
- SPEAr3XX (3XX SOC series, based on ARM9)
- SPEAr300 (SOC)
- SPEAr300 Evaluation Board
- SPEAr310 (SOC)
- SPEAr310 Evaluation Board
- SPEAr320 (SOC)
- SPEAr320 Evaluation Board
- SPEAr6XX (6XX SOC series, based on ARM9)
- SPEAr600 (SOC)
- SPEAr600 Evaluation Board
- SPEAr13XX (13XX SOC series, based on ARM CORTEXA9)
- SPEAr1310 (SOC)
- SPEAr1310 Evaluation Board
- SPEAr1340 (SOC)
- SPEAr1340 Evaluation Board
Configuration
-------------
A generic configuration is provided for each machine, and can be used as the
default by::
make spear13xx_defconfig
make spear3xx_defconfig
make spear6xx_defconfig
Layout
------
The common files for multiple machine families (SPEAr3xx, SPEAr6xx and
SPEAr13xx) are located in the platform code contained in arch/arm/plat-spear
with headers in plat/.
Each machine series have a directory with name arch/arm/mach-spear followed by
series name. Like mach-spear3xx, mach-spear6xx and mach-spear13xx.
Common file for machines of spear3xx family is mach-spear3xx/spear3xx.c, for
spear6xx is mach-spear6xx/spear6xx.c and for spear13xx family is
mach-spear13xx/spear13xx.c. mach-spear* also contain soc/machine specific
files, like spear1310.c, spear1340.c spear300.c, spear310.c, spear320.c and
spear600.c. mach-spear* doesn't contains board specific files as they fully
support Flattened Device Tree.
Document Author
---------------
Viresh Kumar <vireshk@kernel.org>, (c) 2010-2012 ST Microelectronics
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