Hello,
My platform is ARM (zynqmp), seL4 v8. I have created a timer in simple initial
thread:
int err;
seL4_timer_t timer;
vka_object_t ntfn_object;
ntfn_object.cptr = 0;
err = vka_alloc_notification(&_env.vka, &ntfn_object);
assert(err == 0);
err = sel4platsupport_init_default_timer(&_env.vka, &_env.vspace,
&_env.simple, ntfn_object.cptr, &timer);
err = ltimer_set_timeout(&timer.ltimer, NS_IN_MS * 20,
TIMEOUT_PERIODIC);
assert(err == 0);
int count = 0;
int count_s = 0;
while (1) {
/* Handle the timer interrupt */
seL4_Word badge;
seL4_Wait(ntfn_object.cptr, &badge);
printf("time_thread: badge=%lx\n", badge);
sel4platsupport_handle_timer_irq(&timer, badge);
count++;
if ((count / 50) * 50 == count)
{
count_s++;
printf("-----------------timer=%d %d\n", count, count_s);
}
}
It works fine (I am not sure why TIMESTAMP timer interrupt coming every ~40
sec, but it's not an issue right now)
Now I am trying to move all this timer code into a new thread, which I have
created in the same vspace
// create thread
void initSleep(env_t penv) //seL4_BootInfo *info)
{
_penv = penv;
vka_object_t tcb_object = {0};
int error = vka_alloc_tcb(&penv->vka, &tcb_object);
seL4_CPtr cspace_cap;
cspace_cap = simple_get_cnode(&penv->simple);
seL4_CPtr pd_cap;
pd_cap = simple_get_pd(&penv->simple);
seL4_CPtr ipc_page;
seL4_Word ipc_buffer =
(seL4_Word)vspace_new_ipc_buffer(&penv->vspace, &ipc_page);
error = seL4_TCB_Configure(tcb_object.cptr, , seL4_NilData,
cspace_cap, seL4_NilData, pd_cap, seL4_NilData, ipc_buffer, ipc_page);
error = seL4_TCB_SetPriority(tcb_object.cptr,
simple_get_tcb(&penv->simple), seL4_MaxPrio);
seL4_UserContext regs = {
.pc = (seL4_Word)time_thread,
.sp =
(seL4_Word)thread_time_stack
};
error = seL4_TCB_WriteRegisters(tcb_object.cptr, 0, 0, 2,
®s);
error = seL4_TCB_Resume(tcb_object.cptr);
}
And this is thread function
static void time_thread(void)
{
_tick_number = 0;
int count_s = 0;
init_timer();
while (1)
{
/* Handle the timer interrupt */
seL4_Word badge;
seL4_Wait(timer_ntfn_object.cptr, &badge);
printf("time_thread: badge=%lx\n", badge);
sel4platsupport_handle_timer_irq(&timer, badge);
_tick_number++;
if ((_tick_number / 50) * 50 == _tick_number)
{
count_s++;
printf("-----------------timer=%lu %d\n", _tick_number,
count_s);
}
}
The system crashed:
setup_irq@timer.c:81 Setting up IRQ 8000000000000000
<<seL4(CPU 0) [handleInvocation/281 T0xff8000001200 "child of: 'rootserver'"
@42195c]: Invocation of invalid cap #48762580.>>
Here is dump:
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/functions.h:23
421938: d53bd066 mrs x6, tpidrro_el0
setup_irq():
/home/lm/sel4vm/libs/libsel4platsupport/src/timer.c:85
error = seL4_IRQHandler_SetNotification(irq->handler_path.capPtr,
irq->badged_ntfn_path.capPtr);
42193c: f85c8340 ldur x0, [x26,#-56]
arm_sys_send_recv():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:165
register seL4_Word msg1 asm("x3") = *in_out_mr1;
421940: d2800003 mov x3, #0x0 // #0
seL4_SetCap():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/arch/functions.h:59
421944: f901e8c1 str x1, [x6,#976]
arm_sys_send_recv():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:166
register seL4_Word msg2 asm("x4") = *in_out_mr2;
421948: d2800004 mov x4, #0x0 // #0
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:167
register seL4_Word msg3 asm("x5") = *in_out_mr3;
42194c: d2800005 mov x5, #0x0 // #0
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:170
register seL4_Word scno asm("x7") = sys;
421950: 92800007 mov x7, #0xffffffffffffffff // #-1
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:161
register seL4_Word info asm("x1") = info_arg;
421954: d2941001 mov x1, #0xa080 //
#41088
421958: f2a00021 movk x1, #0x1, lsl #16
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:171
asm volatile (
42195c: d4000002 hvc #0x0
seL4_MessageInfo_get_label():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/shared_types_gen.h:49
I suspect that my thread initialization is not right, can somebody see any
problem?
Thank you,
Leonid
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