# Boot failure on u740

**URL:** <https://forums.sifive.com/t/boot-failure-on-u740/5217>\
**Category:** HiFive Unmatched\
**Created:** [September 28, 2021, 5:25am UTC](https://forums.sifive.com/t/boot-failure-on-u740/5217 "2021-09-28T05:25:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![VaibhavJadhav881](https://avatars.discourse-cdn.com/v4/letter/v/a698b9/32.png) [@VaibhavJadhav881](https://forums.sifive.com/u/VaibhavJadhav881)\
**Post date:** [September 28, 2021, 5:25am UTC](https://forums.sifive.com/t/boot-failure-on-u740/5217/1 "2021-09-28T05:25:07Z")

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Hi all,

I am trying to boot android kernel on u740 using yocto. The android kernel version is 5.10.43.  
In yocto sources tag 2021.02, I replaced kernel 5.10.17 with android kernel version 5.10.43.  
Also removed patches  
0020-riscv-Introduce-alternative-mechanism-to-apply-errat.patch  
0021-riscv-sifive-apply-errata-cip-453-patch.patch.

And build the unmatched image.

Following is the error I am facing:  
U-Boot SPL 2021.01 (Sep 16 2021 - 06:46:05 +0000)  
Trying to boot from MMC1  
Unhandled exception: Load access fault  
EPC: 0000000008008d86 RA: 0000000008001358 TVAL: ffffff80000000d0

resetting …  
reset not supported yet

### ERROR ### Please RESET the board

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<div class="post-metadata">

**Author:** ![vmedea](https://avatars.discourse-cdn.com/v4/letter/v/3be4f8/32.png) [@vmedea](https://forums.sifive.com/u/vmedea)\
**Post date:** [September 28, 2021, 3:10pm UTC](https://forums.sifive.com/t/boot-failure-on-u740/5217/2 "2021-09-28T15:10:44Z")

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U-boot doesn’t even get to loading the kernel, let alone running it. It looks like it crashes while loading the second stage (ITB) from MMC. Mind that u-boot needs patches too, the upstream version doesn’t work correctly on the Unmatched yet.