JTAG'ing firmware into imx28 Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Community Moderator Election Results Why I closed the “Why is Kali so hard” questionBooting over the LAN using ubootHow do I load initrd into memory to be passed to kernel when using kexec?Booting using initramfs instead of uramdiskuboot & uImage & linux boot processuboot write kernel into mmc partitionGetting U-Boot to load dtb from FIT imageProblems booting uncompressed linux kernel on PPCAccess the filesystem as the root userBackup Nand Flash memory areaUboot Hangs when Initrd size increased in FIT image

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JTAG'ing firmware into imx28



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election Results
Why I closed the “Why is Kali so hard” questionBooting over the LAN using ubootHow do I load initrd into memory to be passed to kernel when using kexec?Booting using initramfs instead of uramdiskuboot & uImage & linux boot processuboot write kernel into mmc partitionGetting U-Boot to load dtb from FIT imageProblems booting uncompressed linux kernel on PPCAccess the filesystem as the root userBackup Nand Flash memory areaUboot Hangs when Initrd size increased in FIT image



.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








1















My goal here is to load a custom kernel and initramfs into the memory of the wink hub 1 based on imx28 dev board and boot it using the bootm command from u-boot shell.



So, I downloaded the u-boot 2014.01 source code and built it from scratch using the patch provided here then I downloaded the latest buildroot and build the kernel and root file system along with initramfs for the imx28 board.



Using JTAG I'm able to load the u-boot at 0x40000100, kernel at 0x42000000 and initramfs at 0x42300000 but when I pass these addresses into the u-boot shell and hit bootm the kernel hangs after decompressing and nothing happens...



I thought there might be the problem with the kernel but even when I pass just the kernel address without loading the custom one ( i.e. loading the kernel present in the nand memory ) in the RAM still the kernel hangs and does not boot it only works well with the boot (bootcmd) command.



This is the output when trying to load the kernel manually from a memory address nothing happens after decompression.



=> bootm 42000000 42300000 
## Booting kernel from Legacy Image at 42000000 ...
Image Name: Linux-2.6.35.3-flex-dvt
Created: 2014-04-30 3:15:35 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 1928460 Bytes = 1.8 MiB
Load Address: 40008000
Entry Point: 40008000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 42300000 ...
Image Name: Root Filesystem
Created: 2019-01-12 14:23:44 UTC
Image Type: ARM Linux RAMDisk Image (uncompressed)
Data Size: 893637 Bytes = 872.7 KiB
Load Address: 40800000
Entry Point: 40800000
Verifying Checksum ... OK
Loading Kernel Image ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.


But on the u-boot shell just after hitting boot command it boots and everything works fine.



I don't know what I'm doing wrong I've checked the /include/configs/mx28evk.h for the kernel uImage, initramfs & fdt addresses and everything seems right.










share|improve this question






























    1















    My goal here is to load a custom kernel and initramfs into the memory of the wink hub 1 based on imx28 dev board and boot it using the bootm command from u-boot shell.



    So, I downloaded the u-boot 2014.01 source code and built it from scratch using the patch provided here then I downloaded the latest buildroot and build the kernel and root file system along with initramfs for the imx28 board.



    Using JTAG I'm able to load the u-boot at 0x40000100, kernel at 0x42000000 and initramfs at 0x42300000 but when I pass these addresses into the u-boot shell and hit bootm the kernel hangs after decompressing and nothing happens...



    I thought there might be the problem with the kernel but even when I pass just the kernel address without loading the custom one ( i.e. loading the kernel present in the nand memory ) in the RAM still the kernel hangs and does not boot it only works well with the boot (bootcmd) command.



    This is the output when trying to load the kernel manually from a memory address nothing happens after decompression.



    => bootm 42000000 42300000 
    ## Booting kernel from Legacy Image at 42000000 ...
    Image Name: Linux-2.6.35.3-flex-dvt
    Created: 2014-04-30 3:15:35 UTC
    Image Type: ARM Linux Kernel Image (uncompressed)
    Data Size: 1928460 Bytes = 1.8 MiB
    Load Address: 40008000
    Entry Point: 40008000
    Verifying Checksum ... OK
    ## Loading init Ramdisk from Legacy Image at 42300000 ...
    Image Name: Root Filesystem
    Created: 2019-01-12 14:23:44 UTC
    Image Type: ARM Linux RAMDisk Image (uncompressed)
    Data Size: 893637 Bytes = 872.7 KiB
    Load Address: 40800000
    Entry Point: 40800000
    Verifying Checksum ... OK
    Loading Kernel Image ... OK

    Starting kernel ...

    Uncompressing Linux... done, booting the kernel.


    But on the u-boot shell just after hitting boot command it boots and everything works fine.



    I don't know what I'm doing wrong I've checked the /include/configs/mx28evk.h for the kernel uImage, initramfs & fdt addresses and everything seems right.










    share|improve this question


























      1












      1








      1








      My goal here is to load a custom kernel and initramfs into the memory of the wink hub 1 based on imx28 dev board and boot it using the bootm command from u-boot shell.



      So, I downloaded the u-boot 2014.01 source code and built it from scratch using the patch provided here then I downloaded the latest buildroot and build the kernel and root file system along with initramfs for the imx28 board.



      Using JTAG I'm able to load the u-boot at 0x40000100, kernel at 0x42000000 and initramfs at 0x42300000 but when I pass these addresses into the u-boot shell and hit bootm the kernel hangs after decompressing and nothing happens...



      I thought there might be the problem with the kernel but even when I pass just the kernel address without loading the custom one ( i.e. loading the kernel present in the nand memory ) in the RAM still the kernel hangs and does not boot it only works well with the boot (bootcmd) command.



      This is the output when trying to load the kernel manually from a memory address nothing happens after decompression.



      => bootm 42000000 42300000 
      ## Booting kernel from Legacy Image at 42000000 ...
      Image Name: Linux-2.6.35.3-flex-dvt
      Created: 2014-04-30 3:15:35 UTC
      Image Type: ARM Linux Kernel Image (uncompressed)
      Data Size: 1928460 Bytes = 1.8 MiB
      Load Address: 40008000
      Entry Point: 40008000
      Verifying Checksum ... OK
      ## Loading init Ramdisk from Legacy Image at 42300000 ...
      Image Name: Root Filesystem
      Created: 2019-01-12 14:23:44 UTC
      Image Type: ARM Linux RAMDisk Image (uncompressed)
      Data Size: 893637 Bytes = 872.7 KiB
      Load Address: 40800000
      Entry Point: 40800000
      Verifying Checksum ... OK
      Loading Kernel Image ... OK

      Starting kernel ...

      Uncompressing Linux... done, booting the kernel.


      But on the u-boot shell just after hitting boot command it boots and everything works fine.



      I don't know what I'm doing wrong I've checked the /include/configs/mx28evk.h for the kernel uImage, initramfs & fdt addresses and everything seems right.










      share|improve this question
















      My goal here is to load a custom kernel and initramfs into the memory of the wink hub 1 based on imx28 dev board and boot it using the bootm command from u-boot shell.



      So, I downloaded the u-boot 2014.01 source code and built it from scratch using the patch provided here then I downloaded the latest buildroot and build the kernel and root file system along with initramfs for the imx28 board.



      Using JTAG I'm able to load the u-boot at 0x40000100, kernel at 0x42000000 and initramfs at 0x42300000 but when I pass these addresses into the u-boot shell and hit bootm the kernel hangs after decompressing and nothing happens...



      I thought there might be the problem with the kernel but even when I pass just the kernel address without loading the custom one ( i.e. loading the kernel present in the nand memory ) in the RAM still the kernel hangs and does not boot it only works well with the boot (bootcmd) command.



      This is the output when trying to load the kernel manually from a memory address nothing happens after decompression.



      => bootm 42000000 42300000 
      ## Booting kernel from Legacy Image at 42000000 ...
      Image Name: Linux-2.6.35.3-flex-dvt
      Created: 2014-04-30 3:15:35 UTC
      Image Type: ARM Linux Kernel Image (uncompressed)
      Data Size: 1928460 Bytes = 1.8 MiB
      Load Address: 40008000
      Entry Point: 40008000
      Verifying Checksum ... OK
      ## Loading init Ramdisk from Legacy Image at 42300000 ...
      Image Name: Root Filesystem
      Created: 2019-01-12 14:23:44 UTC
      Image Type: ARM Linux RAMDisk Image (uncompressed)
      Data Size: 893637 Bytes = 872.7 KiB
      Load Address: 40800000
      Entry Point: 40800000
      Verifying Checksum ... OK
      Loading Kernel Image ... OK

      Starting kernel ...

      Uncompressing Linux... done, booting the kernel.


      But on the u-boot shell just after hitting boot command it boots and everything works fine.



      I don't know what I'm doing wrong I've checked the /include/configs/mx28evk.h for the kernel uImage, initramfs & fdt addresses and everything seems right.







      embedded hardware boot-loader u-boot






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 13 at 10:42









      Rui F Ribeiro

      42.1k1483142




      42.1k1483142










      asked Jan 13 at 9:46









      r00tb3r00tb3

      164




      164




















          1 Answer
          1






          active

          oldest

          votes


















          0














          I've figured out what the problem was.



          I had enabled low level debugging and had redirected all printk's to Embedded ICE UART port so it would not show any output on the UART console.



          [ ] Kernel low-level debugging functions 
          [ ] Early printk (NEW)
          [ ] Kernel low-level debugging via EmbeddedICE DCC channel (NEW)


          keep it unselected as above.



          Regards,
          Amit.






          share|improve this answer























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            1 Answer
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            active

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            active

            oldest

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            active

            oldest

            votes









            0














            I've figured out what the problem was.



            I had enabled low level debugging and had redirected all printk's to Embedded ICE UART port so it would not show any output on the UART console.



            [ ] Kernel low-level debugging functions 
            [ ] Early printk (NEW)
            [ ] Kernel low-level debugging via EmbeddedICE DCC channel (NEW)


            keep it unselected as above.



            Regards,
            Amit.






            share|improve this answer



























              0














              I've figured out what the problem was.



              I had enabled low level debugging and had redirected all printk's to Embedded ICE UART port so it would not show any output on the UART console.



              [ ] Kernel low-level debugging functions 
              [ ] Early printk (NEW)
              [ ] Kernel low-level debugging via EmbeddedICE DCC channel (NEW)


              keep it unselected as above.



              Regards,
              Amit.






              share|improve this answer

























                0












                0








                0







                I've figured out what the problem was.



                I had enabled low level debugging and had redirected all printk's to Embedded ICE UART port so it would not show any output on the UART console.



                [ ] Kernel low-level debugging functions 
                [ ] Early printk (NEW)
                [ ] Kernel low-level debugging via EmbeddedICE DCC channel (NEW)


                keep it unselected as above.



                Regards,
                Amit.






                share|improve this answer













                I've figured out what the problem was.



                I had enabled low level debugging and had redirected all printk's to Embedded ICE UART port so it would not show any output on the UART console.



                [ ] Kernel low-level debugging functions 
                [ ] Early printk (NEW)
                [ ] Kernel low-level debugging via EmbeddedICE DCC channel (NEW)


                keep it unselected as above.



                Regards,
                Amit.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 17 hours ago









                r00tb3r00tb3

                164




                164



























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