| 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 |
| Viresh Kumar | 71e09a9 | 2012-04-20 22:39:48 +0530 | [diff] [blame] | 11 | supported by the 'spear' platform of ARM Linux. Currently SPEAr1310, |
| 12 | SPEAr1340, SPEAr300, SPEAr310, SPEAr320 and SPEAr600 SOCs are supported. |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 13 | |
| 14 | Hierarchy in SPEAr is as follows: |
| 15 | |
| 16 | SPEAr (Platform) |
| 17 | - SPEAr3XX (3XX SOC series, based on ARM9) |
| 18 | - SPEAr300 (SOC) |
| Viresh Kumar | c5fa4fd | 2012-03-23 00:17:43 +0530 | [diff] [blame] | 19 | - SPEAr300 Evaluation Board |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 20 | - SPEAr310 (SOC) |
| Viresh Kumar | c5fa4fd | 2012-03-23 00:17:43 +0530 | [diff] [blame] | 21 | - SPEAr310 Evaluation Board |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 22 | - SPEAr320 (SOC) |
| Viresh Kumar | c5fa4fd | 2012-03-23 00:17:43 +0530 | [diff] [blame] | 23 | - SPEAr320 Evaluation Board |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 24 | - SPEAr6XX (6XX SOC series, based on ARM9) |
| 25 | - SPEAr600 (SOC) |
| Viresh Kumar | c5fa4fd | 2012-03-23 00:17:43 +0530 | [diff] [blame] | 26 | - SPEAr600 Evaluation Board |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 27 | - SPEAr13XX (13XX SOC series, based on ARM CORTEXA9) |
| Viresh Kumar | 71e09a9 | 2012-04-20 22:39:48 +0530 | [diff] [blame] | 28 | - SPEAr1310 (SOC) |
| 29 | - SPEAr1310 Evaluation Board |
| 30 | - SPEAr1340 (SOC) |
| 31 | - SPEAr1340 Evaluation Board |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 32 | |
| 33 | Configuration |
| 34 | ------------- |
| 35 | |
| 36 | A generic configuration is provided for each machine, and can be used as the |
| 37 | default by |
| Viresh Kumar | 71e09a9 | 2012-04-20 22:39:48 +0530 | [diff] [blame] | 38 | make spear13xx_defconfig |
| 39 | make spear3xx_defconfig |
| 40 | make spear6xx_defconfig |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 41 | |
| 42 | Layout |
| 43 | ------ |
| 44 | |
| Viresh Kumar | 71e09a9 | 2012-04-20 22:39:48 +0530 | [diff] [blame] | 45 | The common files for multiple machine families (SPEAr3xx, SPEAr6xx and |
| 46 | SPEAr13xx) are located in the platform code contained in arch/arm/plat-spear |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 47 | with headers in plat/. |
| 48 | |
| 49 | Each machine series have a directory with name arch/arm/mach-spear followed by |
| 50 | series name. Like mach-spear3xx, mach-spear6xx and mach-spear13xx. |
| 51 | |
| Viresh Kumar | 71e09a9 | 2012-04-20 22:39:48 +0530 | [diff] [blame] | 52 | Common file for machines of spear3xx family is mach-spear3xx/spear3xx.c, for |
| 53 | spear6xx is mach-spear6xx/spear6xx.c and for spear13xx family is |
| 54 | mach-spear13xx/spear13xx.c. mach-spear* also contain soc/machine specific |
| 55 | files, like spear1310.c, spear1340.c spear300.c, spear310.c, spear320.c and |
| 56 | spear600.c. mach-spear* doesn't contains board specific files as they fully |
| 57 | support Flattened Device Tree. |
| viresh kumar | fc0c195 | 2010-04-01 12:31:21 +0100 | [diff] [blame] | 58 | |
| 59 | |
| 60 | Document Author |
| 61 | --------------- |
| 62 | |
| Viresh Kumar | 10d8935 | 2012-06-20 12:53:02 -0700 | [diff] [blame] | 63 | Viresh Kumar <viresh.linux@gmail.com>, (c) 2010-2012 ST Microelectronics |