VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Loader for ADSP-2126x/2136x/2137x SHARC Processors
Rebuilding a Boot Kernel Using Command Lines
Rebuild a boot kernel using command lines as follows.
PROM Booting. The default boot kernel source file for PROM booting is
26x_prom.asm for ADSP-2126x processors. After copying the default file
to my_prom.asm and modifying it to suit your system, use the following
command lines to rebuild the boot kernel.
easm21k -proc ADSP-21262 my_prom.asm
linker -T 2162x_ldr.ldf my_prom.doj
SPI Booting. The default boot kernel source file for link booting is
2126x_SPI.asm for ADSP-2126x processors. After copying the default file
to my_SPI.asm and modifying it to suit your system, use the following
command lines to rebuild the boot kernel:
easm21k -proc ADSP-21262 my_SPI.asm
linker -T 2126x_ldr.ldf my_SPI.doj
Loader File Issues
If you modify the boot kernel for the PROM or SPI booting modes,
ensure that the seg_ldr memory segment is defined in the .ldf file. Refer
to the source of this memory segment in the .ldf file located in the
…\ldr\ installation directory of the target processor.
Because the loader utility uses this address for the first location of the reset
vector during the boot-load process, avoid placing code at the address.
When using any of the processor’s power-up booting modes, ensure that
the address does not contain a critical instruction, because the address is
not executed during the booting sequence. Place a NOP or IDLE in this loca-
VisualDSP++ 4.5 Loader and Utilities Manual 5-21