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- =========================================
- PART-SPECIFIC SOURCE COMPARTMENTALISATION
- =========================================
- The sources for various parts are compartmentalised at two different levels:
- (1) Processor level
- The "processor level" is a CPU core plus the other on-silicon
- peripherals.
- Processor-specific header files are divided among directories in a similar
- way to the CPU level:
- (*) include/asm-mn10300/proc-mn103e010/
- Support for the AM33v2 CPU core.
- The appropriate processor is selected by a CONFIG_MN10300_PROC_YYYY option
- from the "Processor support" choice menu in the arch/mn10300/Kconfig file.
- (2) Unit level
- The "unit level" is a processor plus all the external peripherals
- controlled by that processor.
- Unit-specific header files are divided among directories in a similar way
- to the CPU level; not only that, but specific sources may also be
- segregated into separate directories under the arch directory:
- (*) include/asm-mn10300/unit-asb2303/
- (*) arch/mn10300/unit-asb2303/
- Support for the ASB2303 board with an ASB2308 daughter board.
- (*) include/asm-mn10300/unit-asb2305/
- (*) arch/mn10300/unit-asb2305/
- Support for the ASB2305 board.
- The appropriate processor is selected by a CONFIG_MN10300_UNIT_ZZZZ option
- from the "Unit type" choice menu in the arch/mn10300/Kconfig file.
- ============
- COMPILE TIME
- ============
- When the kernel is compiled, symbolic links will be made in the asm header file
- directory for this arch:
- include/asm-mn10300/proc => include/asm-mn10300/proc-YYYY/
- include/asm-mn10300/unit => include/asm-mn10300/unit-ZZZZ/
- So that the header files contained in those directories can be accessed without
- lots of #ifdef-age.
- The appropriate arch/mn10300/unit-ZZZZ directory will also be entered by the
- compilation process; all other unit-specific directories will be ignored.
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