Zedboard boot from non zero start address

Hello All,
Sorry if this sounds familiar. I wanted to start a new thread to express my query clearly.
I am using zedboard(Petalinux 2014.4, vivado 2014.4) in QSPI boot mode. I divided QSPI into 6 partitions to have two copies of (BOOT.bin+uboot env + image.ub) and used flashcp to program images from userspace.
In the second image I changed offsets in uboot env correctly.
As a quick test, I deleted mtd0 which has BOOT.bin. My expectation is that on a power reset BootROM will keep increment and find my second BOOT.bin(thus appropriate header+fsbl) and execution would proceed from there.
But I don't see any output on terminal.
Is my assumption correct or am I missing some component to make this work.

My reference design is xapp1078 for 2014.4

Thanks

0 Former Member over 9 years ago

GK,
There is more to multi-boot than simply programming multiple images into the QSPI, although that is certainly part of it. The FSBL must be modified to update the location of the images in the QSPI, and to initiate a boot header search if necessary. Please see multi-boot example designs in UG1025, XAPP1175 and the Technical Tip:
http://www.wiki.xilinx.com/Zynq-7000+AP+SoC+Multiboot+Tech+Tip
Ron
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0 Former Member over 9 years ago in reply to Former Member

Hi Ron,
Thanks for your kind response.

I want bootROM to perform the golden image search not FSBL.

I fixed it. The issue was bootROM can only access first 16MB in QSPI for bootheader search. I had (BOOT.bin, boot env, imageUB) in the first 16MB and my golden image (BOOT.bin, boot env, imageUB) was in the next 2nd 16MB.
So I rearranged the partitions to look like mtd(0-BOOT.bin, 1-bootenv, 2-BOOT_GOLD.bin, 3-bootenv_GOLD.bin, 4-image.ub, 5-image_GOLD.ub).
That's it, now if I delete mtd0, bootROM finds header in mtd2 and box boots up.

Regards
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0 Former Member over 9 years ago

GK,
You might also want to take a look at Xilinx AR 57744, which details a strategy created by Spansion for dealing with memory partitions beyond the Linear Addressing (3-byte) available in the BootROM.
Glad you got it sorted!
Ron
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0 Former Member over 9 years ago in reply to Former Member

Ok, Thank you.
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