/*  IBM_PROLOG_BEGIN_TAG
 *  This is an automatically generated prolog.
 *
 *  $Source: src/usr/targeting/common/util.C $
 *
 *  IBM CONFIDENTIAL
 *
 *  COPYRIGHT International Business Machines Corp. 2012
 *
 *  p1
 *
 *  Object Code Only (OCO) source materials
 *  Licensed Internal Code Source Materials
 *  IBM HostBoot Licensed Internal Code
 *
 *  The source code for this program is not published or other-
 *  wise divested of its trade secrets, irrespective of what has
 *  been deposited with the U.S. Copyright Office.
 *
 *  Origin: 30
 *
 *  IBM_PROLOG_END_TAG
 */
/**
 *  @file targeting/common/util.C
 *
 *  @brief Provides miscellaneous utility functions to targeting, including
 *     a check for whether system is in simulation or not.
 */

//******************************************************************************
// Includes
//******************************************************************************
#include <targeting/common/attributes.H>
#include <targeting/common/targetservice.H>

namespace TARGETING
{

/**
 * @brief Checks to see if we are running in a hardware simulation
 *    environment, i.e. VPO/VBU  (not Simics)
 */
bool is_vpo( void )
{
    struct IsVpoFunctor
    {
        static bool operate()
        {
            bool rc = false;

            Target* sys = NULL;
            targetService().getTopLevelTarget(sys);

            uint8_t vpo_mode = 0;
            if (unlikely(sys &&
                         sys->tryGetAttr<ATTR_IS_SIMULATION>(vpo_mode) &&
                         (1 == vpo_mode)))
            {
                rc = true;
            }
            return rc;
        }
    };

#ifdef __HOSTBOOT_MODULE
    // In Hostboot this value cannot change, so cache it as a static.
    static bool is_vpo_mode = IsVpoFunctor::operate();
    return is_vpo_mode;
#else
    // On FSP, assumption is that the user could change this, so we cannot
    // cache it as a static.  Read from the attribute directly.
    return IsVpoFunctor::operate();
#endif
};

/**
 * @brief Safely fetch the HUID of a Target
 */
uint32_t get_huid( const Target* i_target )
{
    uint32_t huid = 0;
    if( i_target == NULL )
    {
        huid = 0x0;
    }
    else if( i_target == MASTER_PROCESSOR_CHIP_TARGET_SENTINEL )
    {
        huid = 0xFFFFFFFF;
    }
    else
    {
        i_target->tryGetAttr<ATTR_HUID>(huid);
    }
    return huid;
}


}