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[/] [ion/] [trunk/] [src/] [ion_noxram.lds] - Diff between revs 67 and 184

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/**
/**
* ion_noxram.lds -- Linker script file for ION project (with no RAM or cache)
* ion_noxram.lds -- Linker script file for ION project (with no RAM or cache)
*
*
* WARNING: This script is no longer used by any makefile, to be removed.
* WARNING: This script is no longer used by any makefile, to be removed or
 
* refactored.
*
*
* The ion cpu has separate buses for code and data (Harvard architecture) but
* The ion cpu has separate buses for code and data (Harvard architecture) and
* does not have caches by default. This linker script targets that 'bare'
* can be used with no cache. This linker script targets that 'bare'
* system configuration. It is meant for early testing and debugging.
* system configuration. It is meant for early testing and debugging.
*
*
* This script will split the object file in two areas so that they can be put
* This script will split the object file in two areas so that they can be put
* in separate memory blocks:
* in separate memory blocks:
* 1.- Code area (text output section)
* 1.- Code area (text output section)
* 2.- Data area (sdata, data and bss output sections)
* 2.- Data area (sdata, data and bss output sections)
*
*
* Since data constants can't be reached from the code bus, constant data
* Since data constants can't be reached from the code bus, constant data
* (usually in section rodata) needs to be put in the same space as other data.
* (usually in section rodata) needs to be put in the same space as other data.
* This is the main purpose of this file.
* This is the main purpose of this file.
* Alternatively, we might jus implement a 3-port memory and leave all sections
* Alternatively, we might just implement a 3-port memory and leave all sections
* adjacent, but that would be too expensive (3-port memory would take about
* adjacent, but that would be too expensive (3-port memory would take about
* twice as many memory blocks for the same memory size).
* twice as many memory blocks for the same memory size).
*
*
* FIXME code and data RAM block sizes hardcoded
* FIXME code and data RAM block sizes hardcoded
* FIXME code and data start addresses hardcoded
* FIXME code and data start addresses hardcoded

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