/* IBM_PROLOG_BEGIN_TAG                                                   */
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/* $Source: src/usr/hwpf/hwp/mvpd_accessors/getMBvpdDram2NModeEnabled.C $ */
/*                                                                        */
/* OpenPOWER HostBoot Project                                             */
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/* Contributors Listed Below - COPYRIGHT 2013,2015                        */
/* [+] International Business Machines Corp.                              */
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/* IBM_PROLOG_END_TAG                                                     */
// $Id: getMBvpdDram2NModeEnabled.C,v 1.4 2014/12/11 13:35:35 whs Exp $
/**
 *  @file getMBvpdDram2NModeEnabled.C
 *
 *  @brief get the Dram 2N Mode value from MBvpd keyword MR
 *         and return whether 2N mode is enabled
 *
 */

#include    <stdint.h>

//  fapi support
#include    <fapi.H>
#include    <fapiUtil.H>
#include    <getMBvpdDram2NModeEnabled.H>
#include    <getMBvpdAttr.H>

extern "C"
{
using   namespace   fapi;

fapi::ReturnCode getMBvpdDram2NModeEnabled(
                              const fapi::Target   &i_mbaTarget,
                              uint8_t  & o_val)
{
    fapi::ReturnCode l_fapirc;
    uint8_t l_dram2NMode [2] = {0,0};

    FAPI_DBG("getMBvpdDram2NModeEnabled: entry ");

    do {
        // Retrieve the Dram 2N Mode from the MR keyword
        FAPI_EXEC_HWP(l_fapirc,
                      getMBvpdAttr,
                      i_mbaTarget,
                      fapi::ATTR_VPD_DRAM_2N_MODE_ENABLED,
                      &l_dram2NMode,
                      sizeof(l_dram2NMode));
        if (l_fapirc)
        {
            FAPI_ERR("getMBvpdDram2NModeEnabled: Read of VZ keyword failed");
            break;  //  break out with fapirc
        }
        // ensure values match
        if (l_dram2NMode[0] != l_dram2NMode[1]) {
            FAPI_ERR("getMBvpdDram2NModeEnabled:"
                     " ports should have same value 0x%02x != 0x%02x",
                     l_dram2NMode[0],l_dram2NMode[1]);
            const uint32_t & PORT0 = l_dram2NMode[0];
            const uint32_t & PORT1 = l_dram2NMode[1];
            const fapi::Target & MBA_TARGET = i_mbaTarget;
            FAPI_SET_HWP_ERROR(l_fapirc,RC_MBVPD_DRAM_2N_MODE_NOT_EQUAL);
            break;  //  break out with fapirc
        }
        // return value
        const uint8_t DRAM_2N_MODE  = 0x02;
        if (DRAM_2N_MODE == l_dram2NMode[0] )
        {
            o_val=fapi::ENUM_ATTR_VPD_DRAM_2N_MODE_ENABLED_TRUE;
        }
        else
        {
            o_val=fapi::ENUM_ATTR_VPD_DRAM_2N_MODE_ENABLED_FALSE;
        }

    } while (0);

    FAPI_DBG("getMBvpdDram2NModeEnabled: exit rc=0x%08x)",
               static_cast<uint32_t>(l_fapirc));

    return  l_fapirc;
}

}   // extern "C"