VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Loader for ADSP-2126x/2136x/2137x SHARC Processors
ADSP-2126x/2136x/2137x Processor Boot Streams
The loader utility generates and inserts a header at the beginning of a
block of contiguous data and instructions in the loader file. The kernel
uses headers to properly place blocks into processor memory. The architecture
of the header follows the convention used by other SHARC
processors.
For all of the ADSP-2126x/2136x/2137x processor boot types, the structures
of block header are the same. The header consists of three 32-bit
words: the block tag, word count, and destination address. The order of
these words is as follows.
0x000000TT First word. Tag of the data block (T).
0x0000CCCC Second word. Data word length or data word count (C) of the data block.
0xAAAAAAAA Third word. Start address (A) of the data block.
ADSP-2126x/2136x/2137x Processor Block Tags
Table 5-12 details the ADSP-2126x/2136x/2137x processor block tags.
Table 5-12. ADSP-2126x/2136x/2137x Processor Block Tags
Tag Count 1 Address Padding
0x0
FINAL_INIT
0x1
ZERO_LDATA
0x2
ZERO_L48 2
0x3
INIT_L16
Number of 16-, 32-,
or 64-bit words
Number of 48-bit
words
Number of 16-bit
words
Logical short, normal,
or long word address
Logical normal word
address
Logical short word
address
None
None
None
If count is odd, pad with
16-bit zero word (See
“INIT_L16 Blocks” on
page 5-27 for details.)
VisualDSP++ 4.5 Loader and Utilities Manual 5-23