Hi Simon, > On 12 Sep 2022, at 10:59 PM, momo aubin <[email protected]> wrote: > > > > Sent from my iPhone > >> On 12 Sep 2022, at 8:31 PM, Simon Glass <[email protected]> wrote: >> >> Hi Aubin, >> >>>> On Mon, 12 Sept 2022 at 09:13, momo aubin <[email protected]> wrote: >>> >>> >>> >>>> On Mon, 12 Sept 2022 at 17:07, Simon Glass <[email protected]> wrote: >>>> >>>> Hi Aubin, >>>> >>>> On Mon, 12 Sept 2022 at 08:23, momo aubin <[email protected]> wrote: >>>>> >>>>> Hi Simon, >>>>> >>>>> Thanks for your answer and explanations. >>>>> >>>>> The sequence of boot is : >>>>> RBL->UBL->UBOOT->Kernel->ROOTFS. >>>>> >>>>> According to this sequence, ubl is the one who chooses which uboot needs >>>>> to be started, then writing the script means writing them inside ubl. >>>>> However, Ubl doesn't have access to the environment variable in order to >>>>> know which u-boot has been used first. >>>>> >>>>> My question is . >>>>> Is it possible to choose another u-boot (u-boot2) inside the first u-boot >>>>> (u-boot1) ? >>>> >>>> Can you please try that reply again, without top posting? >>>> >>>> https://www.google.com/search?q=top+posting >>>> >>>> Regards, >>>> Simon >>>> >>>> >>>>> >>>>> Regards, >>>>> Aubin >>>>> >>>>> On Mon, 12 Sept 2022 at 15:35, Simon Glass <[email protected]> wrote: >>>>>> >>>>>> Hi Momo, >>>>>> >>>>>> On Sun, 11 Sept 2022 at 08:29, momo aubin <[email protected]> wrote: >>>>>>> >>>>>>> Hi Simon, >>>>>>> >>>>>>> Thanks for getting back to me. >>>>>>> >>>>>>> How can I avoid top posting ? i'm a new >>>>>> >>>>>> You can do a web search for "top posting" which explains the issue >>>>>> better than I can. >>>>>> >>>>>>> >>>>>>> How uboot know that the kernel has started ? >>>>>> >>>>>> Generally it does not. U-Boot's job is typically over once it jumps to >>>>>> the kernel. >>>>>> >>>>>>> If the system is blocked during the u-boot stage, is it possible to >>>>>>> restart all the systems ? >>>>>>> It is possible to put a timer in the u-boot stage in case of the kernel >>>>>>> has not started , can the system reboot by choosing another u-boot ? >>>>>> >>>>>> You can use a watchdog timer to reboot the system. It can be set up in >>>>>> U-Boot, then it Linux does not kick it in time, it will cause a >>>>>> reboot. To choose another U-Boot, you would need to do some scripting, >>>>>> or use mender. There is some work on VBE going on (U-Boot standard >>>>>> boot) but it will take a while to all land. >>>>>> >>>>>> Regards, >>>>>> SImon >>>>>> >>>>>> >>>>>>> >>>>>>> >>>>>>> Thanks for your answer in advance. >>>>>>> Aubin >>>>>>> >>>>>>> >>>>>>> On Tue, 30 Aug 2022 at 04:30, Simon Glass <[email protected]> wrote: >>>>>>>> >>>>>>>> Hi Aubin, >>>>>>>> >>>>>>>> On Mon, 29 Aug 2022 at 01:40, momo aubin <[email protected]> wrote: >>>>>>>>> >>>>>>>>> Hi Simon, >>>>>>>>> I got what is the 'dm tree' which is a driver model. This command >>>>>>>>> could be done only in uboot stage. but i got the situation in which >>>>>>>>> the initialisation of u-boot has not finished yet as showing in the >>>>>>>>> following picture. >>>>>>>>> >>>>>>>>> >>>>>>>>> .i would like to know what is wrong in the initialisation ? >>>>>>>> >>>>>>>> Please try to avoid top posting. >>>>>>>> >>>>>>>> I think the best thing is to move to the latest U-Boot. You are about >>>>>>>> 9 years behind! But as to your question, I am really not sure. If it >>>>>>>> is a TI board, you could try asking them? >>>>>>>> >>>>>>>> Regards, >>>>>>>> Simon >>>>>>>> >>>>>>>> >>>>>>>>> >>>>>>>>> Best Regard, >>>>>>>>> Aubin >>>>>>>>> >>>>>>>>> On Mon, 29 Aug 2022 at 05:24, momo aubin <[email protected]> wrote: >>>>>>>>>> >>>>>>>>>> Hi Simon, >>>>>>>>>> >>>>>>>>>> Thanks for your answer. >>>>>>>>>> >>>>>>>>>> The script that you are telling it is Env.txt right ? >>>>>>>>>> >>>>>>>>>> What is a 'dm tree' ? Please could you provide me more infos about >>>>>>>>>> this ? >>>>>>>>>> >>>>>>>>>> Thanks for your answer in advance. >>>>>>>>>> >>>>>>>>>> On Sat, 27 Aug 2022 at 02:21, Simon Glass <[email protected]> wrote: >>>>>>>>>>> >>>>>>>>>>> Hi Aubin, >>>>>>>>>>> >>>>>>>>>>> On Fri, 26 Aug 2022 at 06:41, momo aubin <[email protected]> wrote: >>>>>>>>>>>> >>>>>>>>>>>> Dear all, >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Is there any way that allows us to know that uboot has initialised >>>>>>>>>>>> all his >>>>>>>>>>>> peripherals before starting loading kernel ? >>>>>>>>>>>> >>>>>>>>>>>> The goal of this check is to reset the board in case of bad >>>>>>>>>>>> initialisation >>>>>>>>>>>> and choose a different uboot . >>>>>>>>>>>> >>>>>>>>>>>> Thanks for your answer in advance. >>>>>>>>>>>> Aubin >>>>>>>>>>> >>>>>>>>>>> If there is a failure then it likely results in an error-return code >>>>>>>>>>> from board_init_f() or board_init_r(). These generally halt U-Boot / >>>>>>>>>>> cause a reboot. But this only covers the peripherals that U-Boot >>>>>>>>>>> sets >>>>>>>>>>> up early, like serial, clocks, pinctrl, MMC, PCI, etc. >>>>>>>>>>> >>>>>>>>>>> U-Boot typically does not init a peripheral unless it is needed for >>>>>>>>>>> U-Boot. >>>>>>>>>>> >>>>>>>>>>> While U-Boot is running (e.g. a script) it may start up other >>>>>>>>>>> peripherals (e.g. to read a kernel from USB) and in those cases >>>>>>>>>>> errors >>>>>>>>>>> can be handled by the script. >>>>>>>>>>> >>>>>>>>>>> You can use 'dm tree' to see what devices have been probed >>>>>>>>>>> successfully. >>>>>>>>>>> >>>>>>>>>>> Regards, >>>>>>>>>>> Simon >>> >>> >>> Hi Simon, >>> >>> Thanks for your answer and explanations. >>> >>> The sequence of boot is : >>> RBL->UBL->UBOOT->Kernel->ROOTFS. >>> >>> According to this sequence, ubl is the one who chooses which uboot needs to >>> be started, then writing the script means writing them inside ubl. However, >>> Ubl doesn't have access to the environment variable in order to know which >>> u-boot has been used first. >> >> I don't know what RBL and UBL are. >> >>> >>> My question is . >>> Is it possible to choose another u-boot (u-boot2) inside the first u-boot >>> (u-boot1) ? >> >> Yes you can jump from one U-Boot to another. Something like 'dcache >> off; go <addr>' should work. > I will implement a timer whenever the kernel won’t start the system will jump > to another u-boot. > >> >> >>> >>> Is this correct ? >> >> Regards, >> Simon > Thanks for your answer.
When the system is running and we have two uboot in two différents partition, is there a way to check if the second uboot is corrupted ? Thanks in advance for your answer.
