IoPortManager.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
#include "pedigree/kernel/LockGuard.h"
#include "pedigree/kernel/processor/IoPort.h"
#include "pedigree/kernel/processor/IoPortManager.h"
#include "pedigree/kernel/processor/Processor.h"
#include "pedigree/kernel/utilities/new"
 
IoPortManager IoPortManager::m_Instance;
 
bool IoPortManager::allocate(IoPort* Port, io_port_t ioPort, size_t size) {
  if (Processor::isInitialised() == 0)
    Processor::halt();
 
  // Acquire the lock untill the end of the function
  LockGuard<Spinlock> lock(m_Lock);
 
  // Remove the I/O ports from the list of free I/O ports
  if (m_FreeIoPorts.allocateSpecific(ioPort, size) == false)
    return false;
 
  // Add information to the list of used I/O ports
  m_UsedIoPorts.pushBack(Port);
  return true;
}
 
void IoPortManager::free(IoPort* Port) {
  if (Processor::isInitialised() == 0)
    Processor::halt();
 
  // Acquire the lock untill the end of the function
  LockGuard<Spinlock> lock(m_Lock);
 
  // Remove from the used I/O ports list
  Vector<IoPort*>::Iterator i = m_UsedIoPorts.begin();
  Vector<IoPort*>::Iterator end = m_UsedIoPorts.end();
  for (; i != end; i++)
    if ((*i) == Port) {
      m_UsedIoPorts.erase(i);
      break;
    }
 
  // Add to the free I/O ports list
  m_FreeIoPorts.free(Port->base(), Port->size());
}
 
void IoPortManager::allocateIoPortList(Vector<IoPortInfo*>& IoPorts) {
  // Acquire the lock untill the end of the function
  LockGuard<Spinlock> lock(m_Lock);
 
  for (size_t i = 0; i < m_UsedIoPorts.count(); i++) {
    IoPortInfo* pIoPortInfo = new IoPortInfo(m_UsedIoPorts[i]->base(), m_UsedIoPorts[i]->size(),
                                             m_UsedIoPorts[i]->name());
    IoPorts.pushBack(pIoPortInfo);
  }
}
 
void IoPortManager::freeIoPortList(Vector<IoPortInfo*>& IoPorts) {
  while (IoPorts.count() != 0) {
    IoPortInfo* pIoPortInfo = IoPorts.popBack();
    delete pIoPortInfo;
  }
}
 
//
// Functions only usable in the kernel initialisation phase
//
 
void IoPortManager::initialise(io_port_t ioPortBase, size_t size) {
  m_FreeIoPorts.free(ioPortBase, size);
}
 
IoPortManager::IoPortManager() : m_Lock(), m_FreeIoPorts(), m_UsedIoPorts() {}
IoPortManager::~IoPortManager() {}