VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Loader for ADSP-2126x/2136x/2137x SHARC Processors
The multiprocessor tag, processor ID, and the offset are encapsulated in a
multiprocessor header. The multiprocessor header includes three 32-bit
words: the multiprocessor tag; the ID (0–7) of the associated processor
.dxe file in the lowest byte of a word; and the offset to the next multiprocessor
tag. The loader -id#exe=filename switch is used to assign a
processor ID number to an executable file. The loader -id#ref=N switch is
used to share the same executable file by setting multiple bits in the ID
field. Figure 5-4 shows the multiprocessor header structure.
0xB
PROCESSOR IDS
OFFSET TO NEXT MULITPROCESSOR HEADER
Figure 5-4. Multiprocessor Header
ADSP-2126x/2136x/2137x Processors
Compression Support
The loader utility for ADSP-2126x/2136x/2137x processors offers a
loader file (boot stream) compression mechanism known as zLib. The zLib
compression is supported by a third party dynamic link library,
zLib1.dll. Additional information about the library can be obtained from
the http://www.zlib.net Web site.
The zLib1 dynamic link library is included in VisualDSP++. The library
functions perform the boot stream compression and decompression procedures
when the appropriate options are selected for the loader utility.
The boot kernel with built-in decompression mechanism must perform
the decompression on the compressed boot stream in a booting process.
The default boot kernel with decompression functions are included in
VisualDSP++.
VisualDSP++ 4.5 Loader and Utilities Manual 5-35