topic Re: IVT and linker file for boot from QSPI (SoloX) in i.MX Processors

IVT and linker file for boot from QSPI (SoloX)

ozu — Wed, 21 Oct 2015 12:34:50 GMT

For SoloX SABRE SD:

Can someone post a working example of an image (not having uboot) that boots from QSPI? I am able to boot from QSPI using uboot, which means my qspi config parameters are ok and also my manufacturing tool settings are ok!! Instead of Uboot, when i flash an image with ivt in it, at an offset 0x1000, i dont get any errors while flashing, but the application does not work.

I have read almost all the posts related to QSPI, could not figure out what is wrong with my image. I need an example of IVT and linker file, which when compiled with application, will boot from QSPI. I tried both - using a linker file with QSPI addresses (XIP approach) and using linker file with OCRAM addresses (non XIP), both are not working.

Re: IVT and linker file for boot from QSPI (SoloX)

igorpadykov — Thu, 22 Oct 2015 00:45:53 GMT

Hi ozu

for such example one can look at

MX6 SoloX bare metal startup

Best regards

igor

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Re: IVT and linker file for boot from QSPI (SoloX)

ozu — Thu, 22 Oct 2015 08:21:53 GMT

Thanks for the reply!

The example in the link you provided, flashes and executes the image in RAM.

The same image does not work, when flashed in QSPI. I am flashing image to QSPI the same we flash uboot to QSPI, using manufacturing tool.

The ivt of the example is posted below,

In this ivt, boot_data points to an OCRAM address and rest all are labels. Also, the linker file is meant for OCRAM addresses.

So, I think this program should work even when placed in QSPI (non XIP). But it does not work!

I tried replacing boot_data_ptr and self_ptr by the absolute addresses in QSPI, that also does not work!!

Please help!

ivt_header : .long 0x402000D1

app_code_jump_vector : .long Reset_Handler

.long 0

dcd_ptr : .long 0

boot_data_ptr : .long boot_data

self_ptr : .long ivt_header

.long 0

boot_data : .long 0x00920000 /* for DQ */

image_len : .long 0x18000 /* 96 KB app size */

plugin : .long 0

Re: IVT and linker file for boot from QSPI (SoloX)

igorpadykov — Thu, 22 Oct 2015 09:05:18 GMT

For XIP boot the image has to be built for QuadSPI address space,

so change addresses to starting 6000_0000 - QSPI1 Memory or

7000_0000 - QSPI2 Memory.

If Uboot works for you one can hexdump its ivt and compare with this example.

Re: IVT and linker file for boot from QSPI (SoloX)

ozu — Thu, 22 Oct 2015 11:28:53 GMT

Thanks for the reply!

Looking at the hexdump was useful, now it is working :smileyhappy: