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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/hwpf/hwp/dimmBadDqBitmapAccessHwp.C $ */
/* */
/* IBM CONFIDENTIAL */
/* */
/* COPYRIGHT International Business Machines Corp. 2012,2013 */
/* */
/* 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 otherwise */
/* divested of its trade secrets, irrespective of what has been */
/* deposited with the U.S. Copyright Office. */
/* */
/* Origin: 30 */
/* */
/* IBM_PROLOG_END_TAG */
/**
* @file dimmBadDqBitmapAccessHwp.C
*
* @brief FW Team HWP that accesses the Bad DQ Bitmap.
*/
/*
* Change Log ******************************************************************
* Flag Defect/Feature User Date Description
* ------ -------------- ---------- ----------- ----------------------------
* mjjones 02/17/2012 Created.
* mjjones 01/30/2013 Cope with platform endian
* differences
*/
#include <dimmBadDqBitmapAccessHwp.H>
// DQ Data format in DIMM SPD
const uint32_t DIMM_BAD_DQ_MAGIC_NUMBER = 0xbadd4471;
const uint8_t DIMM_BAD_DQ_VERSION = 1;
struct dimmBadDqDataFormat
{
uint32_t iv_magicNumber;
uint8_t iv_version;
uint8_t iv_reserved1;
uint8_t iv_reserved2;
uint8_t iv_reserved3;
uint8_t iv_bitmaps[DIMM_DQ_MAX_DIMM_RANKS][DIMM_DQ_RANK_BITMAP_SIZE];
};
extern "C"
{
fapi::ReturnCode dimmBadDqBitmapAccessHwp(
const fapi::Target & i_dimm,
uint8_t (&io_data)[DIMM_DQ_MAX_DIMM_RANKS][DIMM_DQ_RANK_BITMAP_SIZE],
const bool i_get)
{
if (i_get)
{
FAPI_INF(">>dimmBadDqBitmapAccessHwp: Getting bitmap");
}
else
{
FAPI_INF(">>dimmBadDqBitmapAccessHwp: Setting bitmap");
}
fapi::ReturnCode l_rc;
// Note the use of heap based arrays to avoid large stack allocations
// Centaur DQ to DIMM Connector DQ Wiring attribute.
uint8_t (&l_wiringData)[DIMM_DQ_NUM_DQS] =
*(reinterpret_cast<uint8_t(*)[DIMM_DQ_NUM_DQS]>
(new uint8_t[DIMM_DQ_NUM_DQS]));
// DQ SPD Attribute
uint8_t (&l_spdData)[DIMM_DQ_SPD_DATA_SIZE] =
*(reinterpret_cast<uint8_t(*)[DIMM_DQ_SPD_DATA_SIZE]>
(new uint8_t[DIMM_DQ_SPD_DATA_SIZE]));
dimmBadDqDataFormat * l_pSpdData =
reinterpret_cast<dimmBadDqDataFormat *>(l_spdData);
// Get the Centaur DQ to DIMM Connector DQ Wiring attribute. Note that for
// C-DIMMs, this will return a simple 1:1 mapping. This code cannot tell
// the difference between C-DIMMs and IS-DIMMs
l_rc = FAPI_ATTR_GET(ATTR_CEN_DQ_TO_DIMM_CONN_DQ, &i_dimm, l_wiringData);
if (l_rc)
{
FAPI_ERR("dimmBadDqBitmapAccessHwp: Error getting wiring attribute");
}
else
{
if (i_get)
{
// Get the SPD DQ attribute
l_rc = FAPI_ATTR_GET(ATTR_SPD_BAD_DQ_DATA, &i_dimm, l_spdData);
if (l_rc)
{
FAPI_ERR("dimmBadDqBitmapAccessHwp: Error getting SPD data");
}
else
{
// Zero caller's data
memset(io_data, 0, sizeof(io_data));
// Check the magic number and version number. Note that the
// magic number is stored in SPD in big endian format and
// platforms of any endianness can access it
if ((FAPI_BE32TOH(l_pSpdData->iv_magicNumber) !=
DIMM_BAD_DQ_MAGIC_NUMBER) ||
(l_pSpdData->iv_version != DIMM_BAD_DQ_VERSION))
{
// SPD DQ data not initialized, return zeros
FAPI_INF("dimmBadDqBitmapAccessHwp: SPD DQ not initialized");
}
else
{
// Translate bitmap from DIMM DQ to Centaur DQ point of view
// for each rank
for (uint8_t i = 0; i < DIMM_DQ_MAX_DIMM_RANKS; i++)
{
// Iterate through all the DQ bits in the rank
for (uint8_t j = 0; j < DIMM_DQ_NUM_DQS; j++)
{
// There is a byte for each 8 DQs, j/8 gives the
// byte number. The MSB in each byte is the lowest
// DQ, (0x80 >> (j % 8)) gives the bit mask
// corresponding to the DQ within the byte
if ((l_pSpdData->iv_bitmaps[i][j/8]) &
(0x80 >> (j % 8)))
{
// DIMM DQ bit is set in SPD data.
// Set Centaur DQ bit in caller's data.
// The wiring data maps Centaur DQ to DIMM DQ
// Find the Centaur DQ that maps to this DIMM DQ
uint8_t k = 0;
for (; k < DIMM_DQ_NUM_DQS; k++)
{
if (l_wiringData[k] == j)
{
io_data[i][k/8] |= (0x80 >> (k % 8));
break;
}
}
if (k == DIMM_DQ_NUM_DQS)
{
FAPI_ERR("dimmBadDqBitmapAccessHwp: Centaur DQ not found for %d!",
j);
}
}
}
}
}
}
}
else
{
// Set up the data to write to SPD
l_pSpdData->iv_magicNumber = FAPI_HTOBE32(DIMM_BAD_DQ_MAGIC_NUMBER);
l_pSpdData->iv_version = DIMM_BAD_DQ_VERSION;
l_pSpdData->iv_reserved1 = 0;
l_pSpdData->iv_reserved2 = 0;
l_pSpdData->iv_reserved3 = 0;
memset(l_pSpdData->iv_bitmaps, 0, sizeof(l_pSpdData->iv_bitmaps));
// Translate bitmap from Centaur DQ to DIMM DQ point of view for
// each rank
for (uint8_t i = 0; i < DIMM_DQ_MAX_DIMM_RANKS; i++)
{
// Iterate through all the DQ bits in the rank
for (uint8_t j = 0; j < DIMM_DQ_NUM_DQS; j++)
{
if ((io_data[i][j/8]) & (0x80 >> (j % 8)))
{
// Centaur DQ bit set in callers data.
// Set DIMM DQ bit in SPD data.
// The wiring data maps Centaur DQ to DIMM DQ
uint8_t dBit = l_wiringData[j];
l_pSpdData->iv_bitmaps[i][dBit/8] |=
(0x80 >> (dBit % 8));
}
}
}
// Set the SPD DQ attribute
l_rc = FAPI_ATTR_SET(ATTR_SPD_BAD_DQ_DATA, &i_dimm, l_spdData);
if (l_rc)
{
FAPI_ERR("dimmBadDqBitmapAccessHwp: Error setting SPD data");
}
}
}
delete [] &l_wiringData;
delete [] &l_spdData;
FAPI_INF("<<dimmBadDqBitmapAccessHwp");
return l_rc;
}
}
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