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// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/usr/scom/scom.C $
//
// IBM CONFIDENTIAL
//
// COPYRIGHT International Business Machines Corp. 2011
//
// 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
/**
* @file scom.C
*
* @brief Implementation of SCOM operations
*/
/*****************************************************************************/
// I n c l u d e s
/*****************************************************************************/
#include <assert.h>
#include <devicefw/driverif.H>
#include <trace/interface.H>
#include <errl/errlentry.H>
#include <errl/errlmanager.H>
#include "scom.H"
// Trace definition
trace_desc_t* g_trac_scom = NULL;
TRAC_INIT(&g_trac_scom, "SCOM", 1024); //1K
namespace SCOM
{
// Register Scom access functions to DD framework
DEVICE_REGISTER_ROUTE(DeviceFW::WILDCARD,
DeviceFW::SCOM,
TARGETING::TYPE_PROC,
scomPerformOp);
DEVICE_REGISTER_ROUTE(DeviceFW::WILDCARD,
DeviceFW::SCOM,
TARGETING::TYPE_MEMBUF,
scomPerformOp);
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
errlHndl_t scomPerformOp(DeviceFW::OperationType i_opType,
TARGETING::Target* i_target,
void* io_buffer,
size_t& io_buflen,
int64_t i_accessType,
va_list i_args)
{
errlHndl_t l_err = NULL;
mutex_t* l_mutex = NULL;
uint64_t l_scomAddr = va_arg(i_args,uint64_t);
// If the indirect scom bit is 0, then doing a regular scom
if( (l_scomAddr & 0x8000000000000000) == 0)
{
l_err = doScomOp(i_opType,
i_target,
io_buffer,
io_buflen,
i_accessType,
l_scomAddr);
}
// We are performing an indirect scom.
else
{
uint64_t l_io_buffer;
uint64_t temp_scomAddr;
memcpy(&l_io_buffer, io_buffer, 8);
memcpy(&temp_scomAddr, &l_scomAddr, 8);
// Get the 20bit indirect scom address
temp_scomAddr = temp_scomAddr & 0x001FFFFF00000000;
// Zero out the indirect address location.. leave the 16bits of data
l_io_buffer = l_io_buffer & 0x000000000000FFFF;
// OR in the 20bit indirect address
l_io_buffer = l_io_buffer | temp_scomAddr;
// zero out the indirect address from the buffer..
l_scomAddr = l_scomAddr & 0x00000000EFFFFFFFF;
// If we are doing a read. We need to do a write first..
if(i_opType == DeviceFW::READ)
{
// use the chip-specific mutex attribute
l_mutex = i_target->getHbMutexAttr<TARGETING::ATTR_SCOM_IND_MUTEX>();
mutex_lock(l_mutex);
// turn the read bit on.
l_io_buffer = l_io_buffer | 0x8000000000000000;
// perform write before the read with the new
// IO_buffer with the imbedded indirect scom addr.
l_err = doScomOp(DeviceFW::WRITE,
i_target,
& l_io_buffer,
io_buflen,
i_accessType,
l_scomAddr);
if (l_err != NULL)
{
mutex_unlock(l_mutex);
return l_err;
}
// Now perform the op requested using the passed in
// IO_Buffer to pass the read data back to caller.
l_err = doScomOp(i_opType,
i_target,
io_buffer,
io_buflen,
i_accessType,
l_scomAddr);
mutex_unlock(l_mutex);
}
else //write
{
// Turn the read bit off.
l_io_buffer = l_io_buffer & 0x7FFFFFFFFFFFFFFF;
// Now perform the op requested using the
// locai io_buffer with the indirect addr imbedded.
l_err = doScomOp(i_opType,
i_target,
& l_io_buffer,
io_buflen,
i_accessType,
l_scomAddr);
}
}
return l_err;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
errlHndl_t doScomOp(DeviceFW::OperationType i_opType,
TARGETING::Target* i_target,
void* io_buffer,
size_t& io_buflen,
int64_t i_accessType,
uint64_t i_addr)
{
errlHndl_t l_err = NULL;
do{
//Always XSCOM the Master Sentinel
if((TARGETING::MASTER_PROCESSOR_CHIP_TARGET_SENTINEL == i_target) ||
(i_target->getAttr<TARGETING::ATTR_SCOM_SWITCHES>().useXscom))
{ //do XSCOM
l_err = deviceOp(i_opType,
i_target,
io_buffer,
io_buflen,
DEVICE_XSCOM_ADDRESS(i_addr));
break;
}
else if(i_target->getAttr<TARGETING::ATTR_SCOM_SWITCHES>().useFsiScom)
{ //do FSISCOM
l_err = deviceOp(i_opType,
i_target,
io_buffer,
io_buflen,
DEVICE_FSISCOM_ADDRESS(i_addr));
if( l_err ) { break; }
}
else
{
//@todo - add target info to assert trace
assert(0,"SCOM::scomPerformOp> ATTR_SCOM_SWITCHES does not indicate Xscom or FSISCOM is supported");
break;
}
}while(0);
return l_err;
}
} // end namespace
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