Re: Hardware irq and vcpu entry

Hi,

On Fri Jun 08, 2012 at 17:27:37 +0200, Pierre Larus wrote:

I am porting an RTOS on L4RE. The RTOS run in a l4_thread and I am currently trying to handle hardware timer irq.

I would like to know if it is possible to attach an hardware irq (timer irq) to a vcpu entry ? I try to do this in a vpcu thread:

vcpu_state->state     = L4_VCPU_F_EXCEPTIONS | L4_VCPU_F_IRQ;
vcpu_state->entry_ip  = (l4_addr_t)&vcpu_entry;
vcpu_state->user_task = L4_INVALID_CAP;

InitClockDevice();

icucap = l4re_get_env_cap("icu");
irqcap = l4re_util_cap_alloc();
l4_factory_create_irq(l4re_global_env->factory, irqcap);
l4_icu_bind(icucap, 38, irqcap);
l4_irq_attach(irqcap, 0x38, current_thread_cap);

StartUpMain();

But this solution does not work.

I think there's an l4_irq_unmask() missing. It's included in an l4_irq_receive() so it works there.

Adam