TMDS64EVM: Authentication of appimage.hs_fs

Yukinobu Hasinoguti

Part Number: TMDS64EVM

Tool/software:

Hi,

I would like to sequentially launch B.appimage.hs_fs and C.appimage.hs_fs from A.appimage.hs_fs, which was booted from SBL_eMMC.
However, when trying to launch B.appimage.hs_fs from A.appimage.hs_fs, an error occurs during the Sciclient_procBootAuthAndStart() check.

Q1. Is it possible to launch another appimage.hs_fs from an appimage.hs_fs that was booted by the SBL?
Example:
RBL -> SBL_eMMC -> A.appimage.hs_fs -> B.appimage.hs

Q2. Is it possible to authenticate another appimage.hs_fs from within an appimage.hs_fs?
It seems that authentication is failing because respParam.flags is 0.

Call stack
　1.Bootloader_parseMultiCoreAppImage() at bootloader.c:1,347 0xA100CB96
　2.Bootloader_verifyMulticoreImage() at bootloader.c:693 0xA100400A
　3.Bootloader_socAuthImage() at bootloader_soc.c:1,244 0xA101E16A
　4.Sciclient_procBootAuthAndStart() at sciclient_procboot.c:267 0xA101A696

Regards,
Yukinobu

4 months ago

0 Prashant Shivhare 4 months ago

TI__Guru 72311 points

Hello,

Please see the following related thread:

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1394016/am2432-how-to-boot-another-appimage-from-ram

Regards,

Prashant

0 Yukinobu Hasinoguti 4 months ago in reply to Prashant Shivhare

Intellectual 300 points

Hi Prashant,

The thread you shared had image authentication disabled.

In my case, I need to boot B.appimage.hs_fs with authentication enabled.

How can I boot all appimages with authentication enabled?

Here is the sequence I’m using:

Bootloader_parseMultiCoreAppImage()
Bootloader_verifyMulticoreImage()
Bootloader_socAuthImage()
Sciclient_procBootAuthAndStart()

However, the following code fails because respParam.flags is 0:

retVal = Sciclient_service(&reqParam, &respParam);
if ((retVal != SystemP_SUCCESS) ||
    ((respParam.flags & TISCI_MSG_FLAG_ACK) != TISCI_MSG_FLAG_ACK))
{
    retVal = SystemP_FAILURE;
}

The RAM dump shows that the memory contents are identical whether the image is booted via SBL or from A.appimage.hs_fs, so I believe the image is loaded correctly.
Still, the authentication fails. How can I resolve this and ensure that authenticated appimages can be booted from RAM?

Regards,
Yukinobu

0 Prashant Shivhare 4 months ago in reply to Yukinobu Hasinoguti

TI__Guru 72311 points

Please apply the patch suggested in the following response:

e2e.ti.com/.../5350965

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TMDS64EVM: Authentication of appimage.hs_fs