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AM625: How do I determine what caused a reset

Magnus Lövdahl
Intellectual 600 points

Part Number: AM625

Hello,

I want to know what caused the reset (hard, soft, watchdog) in user space. How do I do to find that out?

Also

If I read out register MMC_MMRO_RST_SRC(0x04518718) or WKUP_CTRL_MMR_RST_SRC (0x43018178) in u-boot I read value 0x0. Should I do that?

Best regards

Magnus

  • 0
    TI__Guru 54568 points

    Hello Magnus 

    I am looking at your queries, and you may expect a reply by today.

    Regards,

    S.Anil.

  • 0 in reply to Swargam Anil
    TI__Guru* 78370 points

    Hello Magnus,
    One good reference is "Table 6-20. Device Reset Sources" under "6.3.2 Reset Sources" in AM62x TRM
    I'm attaching a sample log before and after issuing "reset" cmd @u-boot for your reference.
    Best,
    -Hong

    Fullscreen am62_9.0_warmreset.log Download 
    U-Boot SPL 2023.04-g24098ea90d (Jul 06 2023 - 12:59:40 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.0.5--v09.00.05 (Kool Koala)')
SPL initial stack usage: 13376 bytes
Trying to boot from MMC2
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.8(release):v2.8-226-g2fcd408bb3-dirty
NOTICE:  BL31: Built : 00:42:57, Jan 13 2023

U-Boot SPL 2023.04-g24098ea90d (Jul 06 2023 - 12:59:40 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.0.5--v09.00.05 (Kool Koala)')
SPL initial stack usage: 1856 bytes
Trying to boot from MMC2
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted


U-Boot 2023.04-g24098ea90d (Jul 06 2023 - 12:59:40 +0000)

SoC:   AM62X SR1.0 GP
Model: Texas Instruments AM625 SK
EEPROM not available at 80, trying to read at 81
Board: AM62-SKEVM rev E2
DRAM:  2 GiB
Core:  71 devices, 31 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  2  0 
=> md.l 0x43018178 1
43018178: 00000000                             ....
=> md.l 0x04518178 1
04518178: 00000000                             ....
=> reset
resetting ...

U-Boot SPL 2023.04-g24098ea90d (Jul 06 2023 - 12:59:40 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.0.5--v09.00.05 (Kool Koala)')
SPL initial stack usage: 13376 bytes
Trying to boot from MMC2
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.8(release):v2.8-226-g2fcd408bb3-dirty
NOTICE:  BL31: Built : 00:42:57, Jan 13 2023

U-Boot SPL 2023.04-g24098ea90d (Jul 06 2023 - 12:59:40 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.0.5--v09.00.05 (Kool Koala)')
SPL initial stack usage: 1856 bytes
Trying to boot from MMC2
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted


U-Boot 2023.04-g24098ea90d (Jul 06 2023 - 12:59:40 +0000)

SoC:   AM62X SR1.0 GP
Model: Texas Instruments AM625 SK
EEPROM not available at 80, trying to read at 81
Board: AM62-SKEVM rev E2
DRAM:  2 GiB
Core:  71 devices, 31 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  2  0 
=> md.l 0x43018178 1
43018178: 00010000                             ....
=> md.l 0x04518178 1
04518178: 00010000                             ....
=>