Loading LDR from flash via adi_rom_Boot()

Hi,

1) What kind of booting is used?

2) What is the size of SPI flash is used? What is the size of you application or .ldr file?

3) Refer ADSP-SC57x HRM topics "Load Function" and "Error Handler" in Section: 46, Page no: 2789 & 2790.

www.analog.com/.../adsp-sc57x-2157x_hwr.pdf

4) Please refer EE-384 in below link:

www.analog.com/.../EE384v01.pdf

Regards,
Anand Selvaraj.

Hi,

1) we are booting LDR containing U-Boot (core 0) from SPI flash. Via U-Boot we are calling ROM API to boot another LDR (sharc - core1) also from SPI flash.  Used adi_rom_Boot() parameters are listed in first post

2) Our SPI flash has 64 MiB. Size of LDR containing code for core1 (SHARC) has about 250 KiB.

3,4) Ok, I will take a look.

Hi Anand,

the ADSP-SC57x/ADSP-2157x SHARC+ Processor document says: "The default error handler eventually puts the core into an idle state", but processor goes into fault state. Therefore I suppose this kind of error can not be handled. I also could not find anything about 16 MiB limit of adi_rom_Boot(). Is it supposed to work on whole range of flash memory?

Thanks,
Jan

Hi Jan,

1) Can you share the code?
2) Are you using Linux or windows?
3) Can you first try with simple LED application? Then try to boot with the intended application.
4) Is it working with debugging mode?

Regards,
Anand Selvaraj.

Hello,

to answer my own question - AFAIK it is not possible. I connected logic analyzer on SPI and it looks like the ROM API uses only 3B address mode. So it can access only lower 16 MiB of memory. When you call rom api to boot from 0x1080000, it will boot from 0x0080000 instead (the upper address byte is ignored).

Also ROM API every time reads one byte from address 0 (for unknown reason to me).

Hi,

Apologies for delayed response.

Should be able to workaround this by using the hook routines and then modifying the SPI controller memory mapped settings to handle transmission of 4 address bytes instead of three. The read from address 0 could be avoided by disabling the auto detection feature.

Attached is an example code that implements this workaround. This code can be directly run on ADSP-21569 Ezkit. Please use this code as a reference and modify for ADSP-SC572 accordingly.

ADSP_21569_RomBoot_Workaround.zip

Regards,
Anand Selvaraj.