zircon/kernel/object/virtual_interrupt_dispatcher.cc

// Copyright 2016 The Fuchsia Authors
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT

#include "object/virtual_interrupt_dispatcher.h"

#include <lib/counters.h>
#include <platform.h>
#include <zircon/rights.h>

#include <dev/interrupt.h>
#include <fbl/alloc_checker.h>
#include <fbl/auto_lock.h>
#include <kernel/auto_lock.h>
#include <kernel/mutex.h>

KCOUNTER(dispatcher_virtual_interrupt_create_count, "dispatcher.virtual_interrupt.create")
KCOUNTER(dispatcher_virtual_interrupt_destroy_count, "dispatcher.virtual_interrupt.destroy")

zx_status_t VirtualInterruptDispatcher::Create(KernelHandle<InterruptDispatcher>* handle,
                                               zx_rights_t* rights, uint32_t options) {
  if (options != ZX_INTERRUPT_VIRTUAL)
    return ZX_ERR_INVALID_ARGS;

  // Attempt to construct the dispatcher.
  fbl::AllocChecker ac;
  KernelHandle new_handle(fbl::AdoptRef(new (&ac) VirtualInterruptDispatcher()));
  if (!ac.check())
    return ZX_ERR_NO_MEMORY;

  new_handle.dispatcher()->set_flags(INTERRUPT_VIRTUAL);

  // Transfer control of the new dispatcher to the creator and we are done.
  *rights = default_rights();
  *handle = ktl::move(new_handle);

  return ZX_OK;
}

// void VirtualInterruptDispatcher::IrqHandler(void* ctx) { }

void VirtualInterruptDispatcher::MaskInterrupt() {}

void VirtualInterruptDispatcher::UnmaskInterrupt() {}

void VirtualInterruptDispatcher::DeactivateInterrupt() {}

void VirtualInterruptDispatcher::UnregisterInterruptHandler() {}

VirtualInterruptDispatcher::VirtualInterruptDispatcher() {
  kcounter_add(dispatcher_virtual_interrupt_create_count, 1);
}

VirtualInterruptDispatcher::~VirtualInterruptDispatcher() {
  kcounter_add(dispatcher_virtual_interrupt_destroy_count, 1);
}