/* IBM_PROLOG_BEGIN_TAG                                                   */
/* This is an automatically generated prolog.                             */
/*                                                                        */
/* $Source: src/usr/pore/poreve/model/porestate.C $                       */
/*                                                                        */
/* OpenPOWER HostBoot Project                                             */
/*                                                                        */
/* COPYRIGHT International Business Machines Corp. 2012,2014              */
/*                                                                        */
/* Licensed under the Apache License, Version 2.0 (the "License");        */
/* you may not use this file except in compliance with the License.       */
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/* IBM_PROLOG_END_TAG                                                     */
// $Id: porestate.C,v 1.2 2011/10/13 10:04:32 haver Exp $

/// \file porestate.C
/// \brief A structure defining the state of a PORE engine for
/// checkpoint/restart purposes.

#include "porestate.H"
#include <string.h>

using namespace vsbe;


PoreState::PoreState()
{
	// Ensure that reserved/free space is always 0 such that we
	// can do memcmp.
	memset(state, 0, sizeof(state));
}


PoreState::~PoreState()
{
}


ModelError
PoreState::get(const PoreRegisterOffset i_offset, uint64_t& o_reg) const
{
    ModelError me;
    int i;

    if ((i_offset >= SIZEOF_PORE_STATE) || ((i_offset % 8) != 0)) {
        me = ME_PORE_STATE_ERROR;
    } else {

        me = ME_SUCCESS;
        o_reg = 0;
        for (i = 0; i < 8; i++) {
            o_reg <<= 8;
            o_reg |= state[i_offset + i];
        }
    }

    return me;
}
        
    
ModelError
PoreState::put(const PoreRegisterOffset i_offset, const uint64_t i_reg)
{
    ModelError me;
    int i;
    uint64_t reg;

    if ((i_offset >= SIZEOF_PORE_STATE) || ((i_offset % 8) != 0)) {
        me = ME_PORE_STATE_ERROR;
    } else {

        me = ME_SUCCESS;
        reg = i_reg;
        for (i = 7; i >= 0; i--) {
            state[i_offset + i] = (reg & 0xff);
            reg >>= 8;
        }
    }

    return me;
}