Texas Instruments TMS320 DSP User Manual page 50

TMS320C54xx Rules and Guidelines
There are, of course, cases where it would be desirable that the core run-time support is accessible with
near calls.
Guideline 13
On processors that support large program model compilations, a version of the algorithm should be
supplied that accessed all core run-time support functions as near functions and all algorithms as far
functions (mixed model).
When extended program memory allows overlays, the usable program space on each page is reduced. To
ensure algorithm usability, the code size for each loadable object must be limited.
Rule 30
On processors that support an extended program address space (paged memory), the code size of any
independently relocatable object module should never exceed the code space available on a page
when overlays are enabled.
Note here that the algorithm can be larger than this limit, but any one independently relocatable object
module must not exceed the limit. For the C54xx, the code size limit is 32K words.
50 DSP-Specific Guidelines SPRU352G – June 2005 – Revised February 2007
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