OpenFirmware.h

/*
 * 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.
 */

#ifndef MACHINE_OF_OF_H
#define MACHINE_OF_OF_H

#include "pedigree/kernel/machine/openfirmware/types.h"
#include "pedigree/kernel/processor/types.h"

class OpenFirmware
{
  private:
    struct PromArgs
    {
        const char *service;
        int nargs;
        int nret;
        void *args[10];
    };

  public:
    typedef int (*OFInterface)(PromArgs *);

    static OpenFirmware &instance()
    {
        return m_Instance;
    }

    void initialise(OFInterface interface);

    OFHandle findDevice(const char *pName);

    OFHandle getSibling(class OFDevice *pDev);

    OFHandle getFirstChild(class OFDevice *pDev);

    OFParam call(
        const char *pService, int nArgs, OFParam p1 = 0, OFParam p2 = 0,
        OFParam p3 = 0, OFParam p4 = 0, OFParam p5 = 0, OFParam p6 = 0,
        OFParam p7 = 0, OFParam p8 = 0);

  private:
    OpenFirmware();
    ~OpenFirmware();

    OFInterface m_Interface;

    static OpenFirmware m_Instance;

    processor_register_t m_Sprg0;
    processor_register_t m_Sprg1;
    processor_register_t m_Sprg2;
    processor_register_t m_Sprg3;
};

#endif