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RobertCNelson / armv7-lpae-multiplatform

MIT License
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Unable to boot v5.4 with rt patch #5

Closed dozack closed 3 years ago

dozack commented 3 years ago

Hello, I am unable to boot linux kernel 5.4 with rt patch on STM32MP157-DK2 development board.

Steps to reproduce

Boot log

U-Boot 2020.10 (Jan 07 2021 - 19:01:09 +0100)

CPU: STM32MP157CAC Rev.B
Model: STMicroelectronics STM32MP157C-DK2 Discovery Board
Board: stm32mp1 in basic mode (st,stm32mp157c-dk2)
Board: MB1272 Var2.0 Rev.C-01
DRAM:  512 MiB
Clocks:
- MPU : 650 MHz
- MCU : 208.878 MHz
- AXI : 266.500 MHz
- PER : 24 MHz
- DDR : 533 MHz
WDT:   Started with servicing (32s timeout)
NAND:  0 MiB
MMC:   STM32 SD/MMC: 0
Loading Environment from MMC... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@5800a000
starting USB...
Bus usbh-ehci@5800d000: USB EHCI 1.00
scanning bus usbh-ehci@5800d000 for devices... 2 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
Hit any key to stop autoboot:  0 
Boot over mmc0!
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:4...
Found /boot/extlinux/extlinux.conf
Retrieving file: /boot/extlinux/extlinux.conf
276 bytes read in 31 ms (7.8 KiB/s)
1:  Linux 5.4.84-armv7-lpae-x40
Retrieving file: /boot/vmlinuz-5.4.84-armv7-lpae-x40
10408448 bytes read in 469 ms (21.2 MiB/s)
append: console=ttySTM0,115200 root=/dev/mmcblk0p4 ro rootfstype=ext4 rootwait
Retrieving file: /boot/dtbs/5.4.84-armv7-lpae-x40/stm32mp157c-dk2.dtb
70187 bytes read in 36 ms (1.9 MiB/s)
## Flattened Device Tree blob at c4000000
Booting using the fdt blob at 0xc4000000
Loading Device Tree to cffeb000, end cffff22a ... OK

Starting kernel ...

Booting does not continue and board is reset every 32 seconds by watchodog. Could you please provide any suggestion how to get any kernel running with rt patch? I do not insist on using 5.4, but i need rt. Thanks

dozack commented 3 years ago

Btw i followed instructions for preparing bootloader, distro and SD card there.

RobertCNelson commented 3 years ago

@dozack this looks like one of the fun bugs i've been chasing down, thumb2+gcc10, i'm seeing the same issue on an imx6 based target..

dozack commented 3 years ago

@RobertCNelson shall i try building with older gcc?

dozack commented 3 years ago

Compiling with toolchain="gcc_arm_gnueabihf_8" solved my problem. Thanks for pinpointing.