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• Trying to get root

  A.Mnemonic • 02/23/2019 at 23:28 • 0 comments

  Default u-boot "bootargs" variable for kernel is following:

  bootargs=quiet console=ttyS0,115200 ubi.mtd=UBI root=ubi:RFS ubi.mtd=UBILD rootfstype=ubifs rw EMAC_MEM=0x100000 DRAM_LEN=0x10000000 mtdparts=edb64M-nand:2432k@0x180000(MBOOT),2432k(MBOOTBAK),2m(UBILD),4m(BFN),6m(KL),54m(MSLIB),18176k(APP),896k(RTPM),-(UBI) norandmaps BRICK_TERMINATOR_SPI_STATUS_OFFSET=0005D000 LX_MEM=0x7000000 LX_MEM2=0x50000000,0xF600000 PM51_ADDR=0x7100000 PM51_LEN=0x10000 BOOTLOGO_IN_MBOOT ENV_VAR_OFFSET=0xBA000 ENV_VAR_SIZE=0x10000 ENV=NAND SECURITY=OFF

   I tried:

  • removing quiet
  • adding single init=/bin/sh

  Without success. If you have any ideas how to modify kernel's boot arguments to gain root shell on uart please leave comment.
  

• U-Boot

  A.Mnemonic • 02/23/2019 at 23:03 • 1 comment

  After connecting to serial console the below bootlog can be observed. When message "Starting kernel ..." is spit out then only message is "Hello UART". There is no shell access. Nothing.
  

  ROM
  
  UART_115200
  AC_ON
  
  [3456789ABC][23456789AB][456789ABCDE][3456789ABC]-7697
  
  
  BIST0-OK[AT][MB][start ub][432]
  
  U-Boot 2011.06-svn (Feb 09 2017 - 14:19:35)  MBOT-1106.0.10.1376750
  
  
  DRAM:  256 MiB
  
  
  Hello U-Boot
  Stack Pointer at: 8ff5dfc0
  mem initial, start 0x8e1d0180, len 0x1020000
  uboot held at [8f000000~90000000]
  Now running in RAM - U-Boot at: 8f1f0180
  NAND:  CIS is found @Blk0
  FCIE is set to 54MHz
  256 MiB
  *** Warning - set default for mtdparts, using default environment
  
  Creating 1 MTD partitions on "nand0":
  0x000000640000-0x000000840000 : "mtd=2"
  Bad block table found at page 131008, version 0x01
  Bad block table found at page 130944, version 0x01
  UBI: attaching mtd1 to ubi0
  UBI: physical eraseblock size:   131072 bytes (128 KiB)
  UBI: logical eraseblock size:    126976 bytes
  UBI: smallest flash I/O unit:    2048
  UBI: VID header offset:          2048 (aligned 2048)
  UBI: data offset:                4096
  Can't find "CTRL" partition
  restore UBI scan
  UBI: the backup volume was not found
  UBI: attached mtd1 to ubi0
  UBI: MTD device name:            "mtd=2"
  UBI: MTD device size:            2 MiB
  UBI: number of good PEBs:        16
  UBI: number of bad PEBs:         0
  UBI: max. allowed volumes:       128
  UBI: wear-leveling threshold:    250
  UBI: number of internal volumes: 2
  UBI: number of user volumes:     1
  UBI: available PEBs:             1
  UBI: total number of reserved PEBs: 15
  UBI: number of PEBs reserved for bad PEB handling: 2
  UBI: max/mean erase counter: 203/110
  Volume  not found!
  
  NAND read: device 0 offset 0x180000, size 0xa8
   168 bytes read: OK
  Volume "MPOOL" found at volume id 0
  Volume "MPOOL" found at volume id 0
  u32EnvRescueOffset = 0x7c000
  In:    serial
  Out:   serial
  Err:   serial
  Net:   No ethernet found.
  MAC:  0x8: 0xf7: 0x28: 0x0:0x4f: 0xc6
  #######################################################################
  # [PROTECT WARNING], miu kernel protect is not enabled on second dram #
  #######################################################################
  Volume "MPOOL" found at volume id 0
  
  Changelist:	001101749
  ============= set bootargs ===============
  Hit any key to stop autoboot:  0 
  fore uup IRKey [0xff]
  AC on
  create Audio SHM data ...[[utopia]]      MApi_AUDIO_SetCommand() : Audio system is not ready yet, please try again later
  
   [Warning!!]No SRS TSXT license!! [[utopia]]      MApi_AUDIO_ReleaseDecodeSystem() : Audio system is not ready yet, please try again later
  [[utopia]]      MApi_AUDIO_ReleaseDecodeSystem() : Audio system is not ready yet, please try again later
  [[utopia]]      MApi_AUDIO_ReleaseDecodeSystem() : Audio system is not ready yet, please try again later
  [AT][MB][audio_preinit][918]
  MDrv_PNL_Init u32PnlRiuBaseAddr = bf200000
  MDrv_PNL_Init u32PMRiuBaseAddr = bf000000
  [_MDrv_PNL_Init_LPLL][305]pstPanelInitData->u16Width=1920, pstPanelInitData->u16Height=1080
  [_MDrv_PNL_Init_LPLL][307]u16HTotal=2199,u16VTotal=1124,pstPanelInitData->u16HTotal=2199,pstPanelInitData->u16VTotal=1124, u16DefaultVFreq=600
  [_MDrv_PNL_Init_Output_Dclk][350]pstPanelInitData->u16Width=1920, pstPanelInitData->u16Height=1080
  [_MDrv_PNL_Init_Output_Dclk][352]u16HTotal=2199,u16VTotal=1124,pstPanelInitData->u16HTotal=2199,pstPanelInitData->u16VTotal=1124, u16DefaultVFreq=600
  [AT][MB][panel_pre_init][972]
  
  NAND read: device 0 offset 0x5a00000, size 0x10000
   65536 bytes read: OK
  Wait for PM51 standby...........PM51 run ok...........msHdmitx_Disp_Init
  [XC,Version] 
   no need to patchEDID NOT READY! 
  EDID NOT READY! 
  EDID NOT READY! 
  EDID NOT READY! 
  EDID NOT READY! 
  Rx Support DVI mode only! 
  shift 0 pixels in NTSC mode 
  Create Dolby single part name task failed!![Hal_VE_EnableDI][1453] bEnable = 0, bIsDNR2VE = 0
  setHDMITxAnalogTuning: Error: MApi_HDMITx_GetRxDCInfoFromEDID EDID is not ready, at 271
  
  [AT][MB][bootlogo begin][1111]
  [AT][MB][JPD Decode][1141]
  
  [GOP3, PID 0, TID 0x-1][Driver Version]: 0089, BuildNum: 0002, ChangeList: 00524916
  [AT][MB][Show Logo][1175]
  [AT][MB][Play...

  Read more »

• Accessing UART

  A.Mnemonic • 02/23/2019 at 22:44 • 0 comments

  UART header pinout, speed: 115200
  

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