Hello,
I have a problem with rebooting my sifive unleashed.
I flashed my SD-card according to the sifive/freedom-u-sdk v201908-branch with “MACHINE=freedom-u540 bitbake demo-coreip-cli”.
The system boots up fine. But if I try to restart the board, I get the following messages:
[ 86.981976] systemd-shutdown[1]: Detaching DM devices.
[ 87.423510] reboot: Restarting system
[ 108.422889] rcu: INFO: rcu_sched self-detected stall on CPU
[ 108.427707] rcu: 0-....: (5249 ticks this GP) idle=eb6/1/0x4000000000000002 softirq=3623/3623 fqs=2592
[ 108.437164] (t=5250 jiffies g=2501 q=41)
[ 108.441158] Task dump for CPU 0:
[ 108.444369] systemd-shutdow R running task 0 1 0 0x00000008
[ 108.451400] Call Trace:
[ 108.453849] [<ffffffe00003d968>] walk_stackframe+0x0/0xa6
[ 108.459220] [<ffffffe00003dace>] show_stack+0x2a/0x34
[ 108.464262] [<ffffffe00005c64a>] sched_show_task+0xba/0x10c
[ 108.469813] [<ffffffe000060bb0>] dump_cpu_task+0x3e/0x48
[ 108.475112] [<ffffffe000089668>] rcu_dump_cpu_stacks+0x7c/0xb4
[ 108.480925] [<ffffffe000088bb8>] rcu_sched_clock_irq+0x3de/0x532
[ 108.486917] [<ffffffe00008d3d4>] update_process_times+0x22/0x4c
[ 108.492821] [<ffffffe00009613e>] tick_periodic+0x42/0xd6
[ 108.498115] [<ffffffe0000961f2>] tick_handle_periodic+0x20/0x5e
[ 108.504028] [<ffffffe000452c54>] riscv_timer_interrupt+0x32/0x3a
[ 108.510018] [<ffffffe0005772fc>] do_IRQ+0xa4/0xb8
[ 108.514700] [<ffffffe00003c8a4>] ret_from_exception+0x0/0xc
[ 108.520256] [<ffffffe00003d056>] machine_restart+0xc/0xe
The whole block (except the first two lines) are repeated every 63 seconds.
Any ideas what could be the problem or how to fix it?
Best regards
Christian