Busfault when MCUboot reads Network core secondary image header in external flash

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Riccardo Gaiati — Mon, 27 Mar 2023 12:05:45 GMT

Thanks ! Yes, I tried one time and seems to work. Thanks !

RE: Busfault when MCUboot reads Network core secondary image header in external flash

jithurm — Thu, 23 Mar 2023 15:05:26 GMT

It seems that this is now fixed in NCS 2.3.0, let's close this

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Riccardo Gaiati — Tue, 29 Nov 2022 10:14:25 GMT

Thanks Hung.

Actually I switched recentrly to multi-image simultaneous upgrade of App and Net Core. Nevertheless, if you place the mcuboot_secondary and mcuboot_secondary_1 in the external SPI/QSPI flash the problem with the bus fault still happen, for both the core. The App core can be fixed with the patch at the link posted 7 months ago https://github.com/nrfconnect/sdk-mcuboot/pull/197

Unfortunately the problem is still present in the netcore, unless you adopt the modification indicated in this ticket.

Looking around the devzone, it seems that some people are affected by these bugs, which have been around for some time now.

But at this point, i will create another ticket for the same problem.

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Hung Bui — Tue, 29 Nov 2022 10:03:53 GMT

Hi Riccardo,

Fix has been implemented for this issue but it seems it caused another issue in SDK v2.1.x .

If you have a look at this case to check if it's the same issue as yours and if the workaround works for you. There is more discussion here.
I would suggest to create a new ticket (if you haven't) for your own issue because you are not using multi-image so I am suspecting it's not the same problem.

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Riccardo Gaiati — Mon, 28 Nov 2022 22:06:14 GMT

Any news about this problem ? Will it get fixed in some version ?

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Riccardo Gaiati — Wed, 15 Jun 2022 09:18:08 GMT

Hi Hung,

I have experienced the same issue with same configuration excpet i am not using the multi-image feature.

I saw that a patch has been developed.

Would it be possible to know when it will be part of the new nordic Connect SDK ? Will it be only available with the version 2.x.x or there will be also a 1.9.2 ?

Thanks in advance !

Kind regads

Riccardo Gaiati

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Hung Bui — Mon, 02 May 2022 14:24:42 GMT

Thanks Jimmy for the update. I have reported to the team and we confirmed it's a bug. The github issue is also update :)

RE: Busfault when MCUboot reads Network core secondary image header in external flash

jithurm — Wed, 27 Apr 2022 14:17:02 GMT

I found a fix to the problem :

In the loader.c file in mcuboot/boot/bootutil/src, I just completely removed these lines from the file :

#if defined(CONFIG_SOC_NRF5340_CPUAPP) && defined(PM_CPUNET_B0N_ADDRESS)
        /* If the update is valid, and it targets the network core: perform the
         * update and indicate to the caller of this function that no update is
         * available
         */
        if (upgrade_valid && reset_addr > PM_CPUNET_B0N_ADDRESS) {
            uint32_t fw_size = hdr->ih_img_size;
            BOOT_LOG_INF("Starting network core update");
            int rc = pcd_network_core_update(vtable, fw_size);
            if (rc != 0) {
                swap_type = BOOT_SWAP_TYPE_FAIL;
            } else {
                BOOT_LOG_INF("Done updating network core");
#if defined(MCUBOOT_SWAP_USING_SCRATCH) || defined(MCUBOOT_SWAP_USING_MOVE)
                /* swap_erase_trailer_sectors is undefined if upgrade only
                 * method is used. There is no need to erase sectors, because
                 * the image cannot be reverted.
                 */
                rc = swap_erase_trailer_sectors(state,
                        secondary_fa);
#endif
                swap_type = BOOT_SWAP_TYPE_NONE;
            }
        }
#endif /* CONFIG_SOC_NRF5340_CPUAPP */

In addition of this patch : https://github.com/nrfconnect/sdk-mcuboot/pull/197

I can now update app core and net core both at the same time or individually.

I don't really understand why this is still left here since now the upgrade of the network core is done after the network core primary image is copied in RAM using MCUboot hooks and defined nrf53_hooks.c .To me it seems to be out of date code that should be removed.

RE: Busfault when MCUboot reads Network core secondary image header in external flash

Hung Bui — Wed, 27 Apr 2022 12:37:07 GMT

Hi Jimmy,
Thanks for giving us update on this. I have reported the issue internally.

One small issue is that Andrzej (nvlsianpu) is on leave and will be back in a month so there will be some delay.

RE: Busfault when MCUboot reads Network core secondary image header in external flash

jithurm — Mon, 25 Apr 2022 15:19:00 GMT

This issue seems to be related, however it has not received any updates from developers yet.