| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 1 | SPEAr ARM Linux Overview |
| 2 | ========================== |
| 3 | |
| 4 | Introduction |
| 5 | ------------ |
| 6 | |
| 7 | SPEAr (Structured Processor Enhanced Architecture). |
| 8 | weblink : http://www.st.com/spear |
| 9 | |
| 10 | The ST Microelectronics SPEAr range of ARM9/CortexA9 System-on-Chip CPUs are |
| 11 | supported by the 'spear' platform of ARM Linux. Currently SPEAr300, |
| 12 | SPEAr310, SPEAr320 and SPEAr600 SOCs are supported. Support for the SPEAr13XX |
| 13 | series is in progress. |
| 14 | |
| 15 | Hierarchy in SPEAr is as follows: |
| 16 | |
| 17 | SPEAr (Platform) |
| 18 | - SPEAr3XX (3XX SOC series, based on ARM9) |
| 19 | - SPEAr300 (SOC) |
| 20 | - SPEAr300_EVB (Evaluation Board) |
| 21 | - SPEAr310 (SOC) |
| 22 | - SPEAr310_EVB (Evaluation Board) |
| 23 | - SPEAr320 (SOC) |
| 24 | - SPEAr320_EVB (Evaluation Board) |
| 25 | - SPEAr6XX (6XX SOC series, based on ARM9) |
| 26 | - SPEAr600 (SOC) |
| 27 | - SPEAr600_EVB (Evaluation Board) |
| 28 | - SPEAr13XX (13XX SOC series, based on ARM CORTEXA9) |
| 29 | - SPEAr1300 (SOC) |
| 30 | |
| 31 | Configuration |
| 32 | ------------- |
| 33 | |
| 34 | A generic configuration is provided for each machine, and can be used as the |
| 35 | default by |
| 36 | make spear600_defconfig |
| 37 | make spear300_defconfig |
| 38 | make spear310_defconfig |
| 39 | make spear320_defconfig |
| 40 | |
| 41 | Layout |
| 42 | ------ |
| 43 | |
| 44 | The common files for multiple machine families (SPEAr3XX, SPEAr6XX and |
| 45 | SPEAr13XX) are located in the platform code contained in arch/arm/plat-spear |
| 46 | with headers in plat/. |
| 47 | |
| 48 | Each machine series have a directory with name arch/arm/mach-spear followed by |
| 49 | series name. Like mach-spear3xx, mach-spear6xx and mach-spear13xx. |
| 50 | |
| 51 | Common file for machines of spear3xx family is mach-spear3xx/spear3xx.c and for |
| 52 | spear6xx is mach-spear6xx/spear6xx.c. mach-spear* also contain soc/machine |
| 53 | specific files, like spear300.c, spear310.c, spear320.c and spear600.c. |
| 54 | mach-spear* also contains board specific files for each machine type. |
| 55 | |
| 56 | |
| 57 | Document Author |
| 58 | --------------- |
| 59 | |
| 60 | Viresh Kumar, (c) 2010 ST Microelectronics |