[U-Boot] U boot booting issues on soft reset
Hi All,
When i do a soft reset or issue a reboot command from linux, uboot is unable to boot,getting stuck . Uncompressing Linux............................................................. ............................................... done, booting the kernel.
But on a power cycle, U-boot seems to be booting kernel just fine without issues . Initially , i thought the U-boot config was not persistent but looks like the U-boot'd doing something weird. What might be the issue?
Does anyone have clues/hints? -Alfred.
Dear alfred steele,
In message 528f13590908072229t65c82d2x1632f530a57956a1@mail.gmail.com you wrote:
When i do a soft reset or issue a reboot command from linux, uboot is unable to boot,getting stuck . Uncompressing Linux............................................................. ............................................... done, booting the kernel.
But on a power cycle, U-boot seems to be booting kernel just fine without issues . Initially , i thought the U-boot config was not persistent but looks like the U-boot'd doing something weird. What might be the issue?
Either U-Boot does not perform a real processor reset on your platform, and/or your system does not really reset all peripherals.
Best regards,
Wolfgang Denk
Dear Wolfgang
Either U-Boot does not perform a real processor reset on your
platform, and/or your system does not really reset all peripherals.
THe issue of a reboot command sure is just a processor reset , it does not reset the peripherals including the NAND i guess. Could it be a problem with the NAND boot code. Or would it be in lowLevelINit. S for our platform. But if that would have been the case, it should not have gone till the point it starts uncompressing the kernel. as you see in my earlier email. Redboot just works fine with the same sequence of issuing a Linux "reboot" everytime. Could that be something wrong with the kernel image.
-Munro.
Dear Alfred,
In message 528f13590908080634w6a0e143xf21bd50ff0a3b763@mail.gmail.com you wrote:
Either U-Boot does not perform a real processor reset on your
platform, and/or your system does not really reset all peripherals.
THe issue of a reboot command sure is just a processor reset , it does not reset the peripherals including the NAND i guess.
That is by far not so sure. A reasonable hardware design will make sure that a CPU reset will also caus eall peripherals, and of course especially the boot device, to be reset, too.
Could it be a problem with the NAND boot code. Or would it be in lowLevelINit. S for our platform. But if that would have been the case, it should not have gone till the point it starts uncompressing the kernel. as you see in my earlier email.
What can we say? We don't know anything about your platform...
Best regards,
Wolfgang Denk
Either U-Boot does not perform a real processor reset on your platform, and/or your system does not really reset all peripherals.
The issue of a reboot command sure is just a processor reset , it does not reset the peripherals including the NAND i guess. Could it be a problem with the NAND boot code. Or would it be in lowLevelINit. S for our platform. But if that would have been the case, it should not have gone till the point it starts uncompressing the kernel. as you see in my earlier email. Redboot just works fine with the same sequence of issuing a Linux "reboot" everytime. Could that be something wrong with the kernel image. Thanks, Alfred
participants (2)
-
alfred steele -
Wolfgang Denk