Dear all
I struggle to start linux on the A7 cores and the example software form the FreeRTOS BSP for i.MX 7Dual V1.0.1 (such as hello_world.elf, pingpong_bm.elf) on the M4 core at the same time. The linux kernel stops after the output Starting kernel ...). We had already a working configuration with M4 and A7 together, but sadly I tried something with the partitions and then I had to reinstall the whole system with the EasyInstaller and then I can’t get back the working configuration.
My configuration is based on the Toradex getting started.
First I installed the Toradex 2.8.4 Linux (2018_10_05) with the EasyInstaller.
Then I saved the pingpong_bm.elf from Linux with
root@colibri-imx7:~# ubiupdatevol /dev/ubi0_2 pingpong_bm.elf
In u-boot i set the following environment settings:
Colibri iMX7 # setenv defargs clk_ignore_unused
Colibri iMX7 # setenv fdt_fixup 'fdt addr ${fdt_addr_r} && fdt rm /soc/aips-bus@30800000/spba-bus@30800000/serial@30890000'
Colibri iMX7 # setenv m4boot 'ubi read ${loadaddr} m4firmware && bootaux ${loadaddr}'
Colibri iMX7 # saveenv
Then I boot the system and get the following outputs:
U-Boot 2016.11 (Dec 05 2018 - 19:49:37 +0100)
CPU: Freescale i.MX7D rev1.2 996 MHz (running at 792 MHz)
CPU: Extended Commercial temperature grade (-20C to 105C) at 24C
Reset cause: POR
DRAM: 512 MiB
PMIC: RN5T567 LSIVER=0x01 OTPVER=0x0d
NAND: 512 MiB
MMC: FSL_SDHC: 0
Video: 640x480x18
In: serial
Out: serial
Err: serial
Model: Toradex Colibri iMX7 Dual 512MB V1.1C, Serial# 02928111
Net: FEC0
Hit any key to stop autoboot: 0
Booting from NAND...
ubi0: default fastmap pool size: 200
ubi0: default fastmap WL pool size: 100
ubi0: attaching mtd1
ubi0: attached by fastmap
ubi0: fastmap pool size: 200
ubi0: fastmap WL pool size: 100
ubi0: attached mtd1 (name "mtd=4", size 508 MiB)
ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
ubi0: good PEBs: 4060, bad PEBs: 4, corrupted PEBs: 0
ubi0: user volume: 4, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 6/3, WL threshold: 4096, image sequence number: 1504894635
ubi0: available PEBs: 0, total reserved PEBs: 4060, PEBs reserved for bad PEB handling: 76
No size specified -> Using max size (50236)
Read 50236 bytes from volume m4firmware to 80800000
## Starting auxiliary core at 0x009100B5 ...
No size specified -> Using max size (5566712)
Read 5566712 bytes from volume kernel to 81000000
No size specified -> Using max size (45033)
Read 45033 bytes from volume dtb to 82000000
Kernel image @ 0x81000000 [ 0x000000 - 0x54f0f8 ]
## Flattened Device Tree blob at 82000000
Booting using the fdt blob at 0x82000000
Loading Device Tree to 8fff2000, end 8fffffe8 ... OK
Updating MTD partitions...
Starting kernel ...
If I only starts an example like hello_world.elf without starting the A7 cores, it works fine.
Colibri iMX7 # fatload mmc 0:1 ${loadaddr} hello_world.elf
Colibri iMX7 # bootaux ${loadaddr}
Also if I only starts the A7 core without the M4 core it works.
I have also tested this on a second colibri iMX7d module an with a self compiled version of the Toradex kernel (Toradex Getting Started - Build U-Boot and Linux Kernel from Source Code) without success.
Do you have any idea what I missed?
Thank you in advance!
freip2