Boot using U-Boot

You must first boot the board with U-Boot from the microSD card. After U-Boot launches, you can load the QNX IFS.

For information about how to boot U-Boot and then load the QNX IFS using an microSD card, see the Load the QNX IFS from the microSD section in this chapter.

Load the QNX IFS from the microSD card

The followings steps describe how to boot board using U-Boot and then load the QNX IFS from your microSD card. Before you can complete these steps, you must prepare the microSD card. For more information, see the Preparing the microSD to boot the board section in this chapter for more information.

Connect your Sitara AM62p SK target board to your host system.
On your host machine, start your favorite terminal program with these settings:
- Baud rate: 115200
- Data: 8 bit
- Parity: none
- Stop: 1 bit
- Flow control: none
- Serial Device: /dev/ttyUSB0
Connect the Sitara AM62p SK board to the power supply. The board will turn on automatically. To reset the board, press the reset button SW3.
Figure 1Power Connector / Reset Button

After the power is turned on, output from U-Boot appears terminal console. When you see the prompt Hit any key to stop autoboot, press any key on your keyboard to interrupt the boot process as follows:

						U-Boot SPL 2024.04-ti-gfda88f8bcea3 (Jul 26 2024 - 11:00:12 +0000)
						SYSFW ABI: 4.0 (firmware rev 0x000a '10.0.8--v10.00.08 (Fiery Fox)')
						SPL initial stack usage: 17048 bytes
						Trying to boot from MMC2
						Authentication passed
						Authentication passed
						Authentication passed
						Authentication passed
						Authentication passed
						Starting ATF on ARM64 core...

						NOTICE:  BL31: v2.10.0(release):v2.10.0-367-g00f1ec6b87-dirty
						NOTICE:  BL31: Built : 16:09:05, Feb  9 2024

						U-Boot SPL 2024.04-ti-gfda88f8bcea3 (Jul 26 2024 - 11:00:12 +0000)
						SYSFW ABI: 4.0 (firmware rev 0x000a '10.0.8--v10.00.08 (Fiery Fox)')
						SPL initial stack usage: 1904 bytes
						Trying to boot from MMC2
						Authentication passed
						Authentication passed


						U-Boot 2024.04-ti-gfda88f8bcea3 (Jul 26 2024 - 11:00:12 +0000)

						SoC:   AM62PX SR1.0 HS-FS
						Model: Texas Instruments AM62P5 SK
						DRAM:  2 GiB (effective 8 GiB)
						Core:  85 devices, 31 uclasses, devicetree: separate
						MMC:   mmc@fa10000: 0, mmc@fa00000: 1
						Loading Environment from nowhere... OK
						In:    serial
						Out:   serial
						Err:   serial
						Net:   eth0: ethernet@8000000port@1
						Warning: ethernet@8000000port@2 (eth1) using random MAC address - ba:bb:fe:98:d4:08
						, eth1: ethernet@8000000port@2
						Hit any key to stop autoboot:  0  
=>

On the U-Boot prompt, type the following U-Boot commands to load the QNX IFS from the microSD card:

mmcinfo
fatload mmc 1 88000000 psdk_linux_9.2_k3-am62p5-sk-am62pxx-evm.dtb
fatload mmc 1 80080000 qnx-ifs
go 80080000 88000000

after you run the go 80080000 88000000 command, QNX OS loads.

=> mmcinfo
Device: mmc@fa10000
Manufacturer ID: 13
OEM: 4e
Name: G1M15L 
Bus Speed: 200000000
Mode: HS400 (200MHz)
Rd Block Len: 512
MMC version 5.1
High Capacity: Yes
Capacity: 29.6 GiB
Bus Width: 8-bit DDR
Erase Group Size: 512 KiB
HC WP Group Size: 8 MiB
User Capacity: 29.6 GiB WRREL
Boot Capacity: 31.5 MiB ENH
RPMB Capacity: 4 MiB ENH
Boot area 0 is not write protected
Boot area 1 is not write protected
=> fatload mmc 1 88000000 psdk_linux_9.2_k3-am62p5-sk-am62pxx-evm.dtb
60449 bytes read in 31 ms (1.9 MiB/s)
=> fatload mmc 1 80080000 qnx-ifs
48455576 bytes read in 2042 ms (22.6 MiB/s)
=> go 80080000 88000000
## Starting application at 0x80080000 ...
Hypervisor support disabled
MMU: 16-bit ASID 40-bit PA TCR_EL1=00000012b5183519
ARM GIC-500 r1p1, arch v3.0 detected
gic_v3_lpi_add_entry for vectors 8192 -> 8447, Ok
gic_v3_lpi_add_entry for vectors 8448 -> 65535, Ok
No SPI intrinfo. Add default entry for 32 -> 287 vectors, Ok
LPI config table #1 @ 0000000081d35000, callout vaddr: ffffff8040291000
aarch64_cpuspeed: core speed 1200
cpu0: MPIDR=0000000080000000
cpu0: MIDR=410fd034 Cortex-A53 r0p4
cpu0: CWG=4 ERG=4 Dminline=4 Iminline=4 VIPT
cpu0: CLIDR=a200023 LoUU=1 LoC=2 LoUIS=1
cpu0: L1 Icache 32K linesz=64 set/way=256/2
cpu0: L1 Dcache 32K linesz=64 set/way=128/4
cpu0: L2 Unified 512K linesz=64 set/way=512/16
Enabling ITS 0
ITS queue at 0000000082550000, num slots: 256
Issue MAPC/SYNC/INVALL commands for ICID 0
update CWRITER to 0x00000060
Waiting for all commands to be processed ... Done in 1 tries
Enable LPIs in GICR_CTLR @ 0000000001880000 for CPU0
no DSS_DSI0 power: trying to turn it on
no DSS1 power: trying to turn it on
init_usb_host: USB0
SYSFW ABI: 4.0 (firmware rev 10 '10.0.8--v10.00.08 (Fiery Fox)'
init_usb_host: USB1
Loading IFS...decompressing...done
aarch64_cpuspeed: core speed 1200
cpu1: MPIDR=0000000080000001
cpu1: MIDR=410fd034 Cortex-A53 r0p4
cpu1: CWG=4 ERG=4 Dminline=4 Iminline=4 VIPT
cpu1: CLIDR=a200023 LoUU=1 LoC=2 LoUIS=1
cpu1: L1 Icache 32K linesz=64 set/way=256/2
cpu1: L1 Dcache 32K linesz=64 set/way=128/4
cpu1: L2 Unified 512K linesz=64 set/way=512/16
ITS 0 already Enabled
ITS queue at 0000000082550000, num slots: 256
Issue MAPC/SYNC/INVALL commands for ICID 1
update CWRITER to 0x000000c0
Waiting for all commands to be processed ... Done in 1 tries
Enable LPIs in GICR_CTLR @ 00000000018a0000 for CPU1
aarch64_cpuspeed: core speed 1200
cpu2: MPIDR=0000000080000002
cpu2: MIDR=410fd034 Cortex-A53 r0p4
cpu2: CWG=4 ERG=4 Dminline=4 Iminline=4 VIPT
cpu2: CLIDR=a200023 LoUU=1 LoC=2 LoUIS=1
cpu2: L1 Icache 32K linesz=64 set/way=256/2
cpu2: L1 Dcache 32K linesz=64 set/way=128/4
cpu2: L2 Unified 512K linesz=64 set/way=512/16
ITS 0 already Enabled
ITS queue at 0000000082550000, num slots: 256
Issue MAPC/SYNC/INVALL commands for ICID 2
update CWRITER to 0x00000120
Waiting for all commands to be processed ... Done in 1 tries
Enable LPIs in GICR_CTLR @ 00000000018c0000 for CPU2
aarch64_cpuspeed: core speed 1200
cpu3: MPIDR=0000000080000003
cpu3: MIDR=410fd034 Cortex-A53 r0p4
cpu3: CWG=4 ERG=4 Dminline=4 Iminline=4 VIPT
cpu3: CLIDR=a200023 LoUU=1 LoC=2 LoUIS=1
cpu3: L1 Icache 32K linesz=64 set/way=256/2
cpu3: L1 Dcache 32K linesz=64 set/way=128/4
cpu3: L2 Unified 512K linesz=64 set/way=512/16
ITS 0 already Enabled
ITS queue at 0000000082550000, num slots: 256
Issue MAPC/SYNC/INVALL commands for ICID 3
update CWRITER to 0x00000180
Waiting for all commands to be processed ... Done in 1 tries
Enable LPIs in GICR_CTLR @ 00000000018e0000 for CPU3

System page at phys:0000000081d44000 user:ffffff80402b6000 kern:ffffff80402b2000
Starting next program at vffffff80600894b0
syspage::hypinfo::flags=0x00000000
 
Welcome to QNX 8.0.0 on TI_AM62P_SK_EVM_Board !
 
Starting I2C driver ...
start serial driver
Starting MMC/SD memory card driver... eMMC
Starting MMC/SD memory card driver... SD
Starting Flash driver...
Starting XHCI driver on USB3SS0 and USB3SS1
Path=0 - am65x
 target=0 lun=0     Direct-Access(0) - SDMMC: G1M15L Rev: 1.0
Starting devf-ram filesystem ...
Starting networking ...
Starting DHCP client ...
Starting SSH daemon ...
Starting devc-pty manager ...
Starting qconn daemon ...
Starting shell ...
#

You should now be able to test the OS by executing any shell command, or any command residing within the QNX IFS image. For example: ls or uname -a.

Note:

Addresses are interpreted as hexadecimal, therefore entering 0x80080000 and 80080000 are considered to be the same.

Note:

After you've completed the steps above, you can put the following command in the uenv.txt file and then copy it to the micro SD card, which permits your system to automatically boot the QNX IFS.

'uenvcmd=mmcinfo; fatload mmc 1 88000000 psdk_linux_9.2_k3-am62p5-sk-am62pxx-evm.dtb; fatload mmc 1 80080000 qnx-ifs; go 80080000 88000000'

Page updated: September 26, 2025