[            (1*installer)  2 shell  3 shell  4- log           ][ Jan 01  0:02 ]

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<Tab> moves; <Space> selects; <Enter> activates buttons                         

=> setenv distro_bootpart ${mmcpart}
=> printenv distro_bootpart         
distro_bootpart=1
=> setenv boot_targets mmc
=> printenv boot_targets
boot_targets=mmc
=> setenv fdtfile ${fdt_file}
=> printenv fdtfile
fdtfile=imx53-qsrb.dtb
=> setenv bootpart ${mmcpart}
=> printenv bootpart
bootpart=1
=> setenv devnum ${mmcdev}
=> printenv devnum
devnum=0
=> setenv console ttymxc0
=> printenv console
=> setenv devtype mmc
=> printenv devtype  
devtype=mmc
=> setenv fdt_addr_r ${fdt_addr}
=> printenv fdt_addr_r                                    
fdt_addr_r=0x71000000
=> setenv ramdisk_addr_r ${loadaddr}
=> printenv ramdisk_addr_r          
ramdisk_addr_r=0x72000000
=> setenv kernel_addr_r 0x70008000
=> printenv kernel_addr_r
kernel_addr_r=0x70008000
=> boot

 % wget "http://deb.devuan.org/devuan/dists/beowulf/main/installer-armhf/current/images/hd-media/SD-card-images/firmware.MX53LOCO.img.gz
 % wget "http://deb.devuan.org/devuan/dists/beowulf/main/installer-armhf/current/images/hd-media/SD-card-images/partition.img.gz"
 % zcat firmware.MX53LOCO.img.gz partition.img.gz > complete_image.img

fdb1096a90394878f0f5e23e146cc89ecd55d867b4b9327b791112041d8c9f51  complete_image.img
69376dc6f680a9d7273e36f39cb0d8d2f9d2fccd0756a13cff63b588e1b2ca24  firmware.MX53LOCO.img.gz
f3cf86ab65a1ca2469ca9fe9fe7ac1e9267d3c69bc5f12c7131503bb5e5764ca  partition.img.gz

 % file firmware.MX53LOCO.img partition.img complete_image.img
firmware.MX53LOCO.img: DOS/MBR boot sector; partition 1 : ID=0xc, active, start-CHS (0x0,32,33), end-CHS (0xc,114,38), startsector 2048, 197952 sectors
partition.img:         DOS/MBR boot sector, code offset 0x58+2, OEM-ID "mkfs.fat", Media descriptor 0xf8, sectors/track 32, heads 64, sectors 197952 (volumes > 32 MB), FAT (32 bit), sectors/FAT 1523, reserved 0x1, serial number 0x3498c0b4, unlabeled
complete_image.img:    DOS/MBR boot sector; partition 1 : ID=0xc, active, start-CHS (0x0,32,33), end-CHS (0xc,114,38), startsector 2048, 197952 sectors

=> printenv 
baudrate=115200
boot_fdt=try
bootcmd=mmc dev ${mmcdev}; if mmc rescan; then if run loadbootscript; then run bootscript; else if run loadimage; then run mmcboot; else run netboot; fi; fi; else run netboot; fi
bootdelay=2
bootscript=echo Running bootscript from mmc ...; source
ethact=FEC
ethaddr=00:04:9f:02:3e:73
ethprime=FEC0
fdt_addr=0x71000000
fdt_file=imx53-qsrb.dtb
fileaddr=72000000
filesize=627
image=zImage
ip_dyn=yes
loadaddr=0x72000000
loadbootscript=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};
loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}
loadimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}
mmcargs=setenv bootargs console=ttymxc0,${baudrate} root=${mmcroot}
mmcboot=echo Booting from mmc ...; run mmcargs; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootz ${loadaddr} - ${fdt_addr}; else if test ${boot_fdt} = try; then bootz; else echo WARN: Cannot load the DT; fi; fi; else bootz; fi;
mmcdev=0
mmcpart=1
mmcroot=/dev/mmcblk0p2 rw rootwait
netargs=setenv bootargs console=ttymxc0,${baudrate} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp
netboot=echo Booting from net ...; run netargs; if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; ${get_cmd} ${image}; if test ${boot_fdt} = yes ||  test ${boot_fdt} = try; then if ${get_cmd} ${fdt_addr} ${fdt_file}; then bootz ${loadaddr} - ${fdt_addr}; else if test ${boot_fdt} = try; then bootz; else echo ERROR: Cannot load the DT; exit; fi; fi; else bootz; fi;
script=boot.scr

Environment size: 1549/8188 bytes
=> ls mmc ${mmcdev}:${mmcpart} /
 17385125   initrd.gz
            dtbs/
     1575   boot.scr
  4260352   vmlinuz

3 file(s), 1 dir(s)
=> bdinfo
arch_number = 0x00000cc9
boot_params = 0x70000100
DRAM bank   = 0x00000000
-> start    = 0x70000000
-> size     = 0x20000000
DRAM bank   = 0x00000001
-> start    = 0xb0000000
-> size     = 0x20000000
eth0name    = FEC
ethaddr     = 00:04:9f:02:3e:73
current eth = FEC
ip_addr     = <NULL>
baudrate    = 115200 bps
TLB addr    = 0x8fff0000
relocaddr   = 0x8ff6c000
reloc off   = 0x1876c000
irq_sp      = 0x8f569eb0
sp start    = 0x8f569ea0
FB base     = 0x8f56c900

 % sudo losetup --show --find --partscan partition.img
 % sudo mount /dev/loop0 /mnt/imx53 
 % file /mnt/imx53/*       
/mnt/imx53/boot.scr:  u-boot legacy uImage, , Linux/ARM, Script File (gzip), 1511 bytes, Mon May 11 17:46:03 2020, Load Address: 0x00000000, Entry Point: 0x00000000, Header CRC: 0x79006BD0, Data CRC: 0x8734369F
/mnt/imx53/dtbs:      directory
/mnt/imx53/initrd.gz: gzip compressed data, max compression, from Unix, original size modulo 2^32 46077952
/mnt/imx53/vmlinuz:   Linux kernel ARM boot executable zImage (little-endian)
 % file /mnt/imx53/dtbs/imx53-qsrb.dtb
/mnt/imx53/dtbs/imx53-qsrb.dtb: Device Tree Blob version 17, size=21932, boot CPU=0, string block size=1236, DT structure block size=20640
 % strings /mnt/imx53/boot.scr
# Bootscript using the new unified bootcmd handling
# introduced with u-boot v2014.10
if test -n "${boot_targets}"; then
  echo "Mainline u-boot / new-style environment detected."
else
  echo "Non-mainline u-boot or old-style mainline u-boot detected."
  echo "This boot script uses the unified bootcmd handling of mainline"
  echo "u-boot >=v2014.10, which is not available on your system."
  echo "Please boot the installer manually."
  exit 0
if test -z "${fdtfile}"; then
  echo 'fdtfile environment variable not set. Aborting boot process.'
  exit 0
if test -n "${distro_bootpart}"; then
  setenv partition "${distro_bootpart}"
else
  setenv partition "${bootpart}"
if test ! -e ${devtype} ${devnum}:${partition} dtbs/${fdtfile}; then
  echo "This installer medium does not contain a suitable device-tree file for"
  echo "this system (${fdtfile}). Aborting boot process."
  exit 0
# Some i.MX6-based systems do not encode the baudrate in the console variable
if test "${console}" = "ttymxc0" && test -n "${baudrate}"; then
  setenv console "${console},${baudrate}"
if test -n "${console}"; then
  setenv bootargs "${bootargs} console=${console}"
load ${devtype} ${devnum}:${partition} ${kernel_addr_r} vmlinuz \
&& load ${devtype} ${devnum}:${partition} ${fdt_addr_r} dtbs/${fdtfile} \
&& load ${devtype} ${devnum}:${partition} ${ramdisk_addr_r} initrd.gz \
&& echo "Booting the Devuan installer..." \
&& bootz ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r}

 % sudo dd of=/dev/sdb if=complete_image.img bs=4M status=progress 
71303168 bytes (71 MB, 68 MiB) copied, 1 s, 66,8 MB/s
24+1 records in
24+1 records out
102400000 bytes (102 MB, 98 MiB) copied, 18,5083 s, 5,5 MB/s

U-Boot 2019.01+dfsg-7 (May 14 2019 - 02:07:44 +0000)

CPU:   Freescale i.MX53 rev2.1 at 800 MHz
Reset cause: POR
Board: MX53 LOCO
I2C:   ready
DRAM:  1 GiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   FEC
Hit any key to stop autoboot:  0 
switch to partitions #0, OK
mmc0 is current device
1575 bytes read in 21 ms (73.2 KiB/s)
Running bootscript from mmc ...
## Executing script at 72000000
Non-mainline u-boot or old-style mainline u-boot detected.
This boot script uses the unified bootcmd handling of mainline
u-boot >=v2014.10, which is not available on your system.
Please boot the installer manually.
=>