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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/occ/reset.c $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2011,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <occ_common.h>
#include <common_types.h>
#include "ssx_io.h"
#include "trac.h"
#include "rtls.h"
#include "state.h"
#include "dcom.h"
// Holds the state of the reset state machine
uint8_t G_reset_state = RESET_NOT_REQUESTED;
// Flag indicating if we should halt on a reset request, or if we should
// enter the reset state machine. Default this to false
bool G_halt_on_reset_request = FALSE;
// Function Specification
//
// Name: reset_disable_halt
//
// Description: Clear Flag that indicates if OCC should call halt
//
// End Function Specification
inline void reset_disable_halt(void)
{
G_halt_on_reset_request = FALSE;
}
// Function Specification
//
// Name: isSafeStateRequested
//
// Description: Helper function for determining if we should go to safe state
//
// End Function Specification
bool isSafeStateRequested(void)
{
return ((RESET_REQUESTED_DUE_TO_ERROR == G_reset_state) ? TRUE : FALSE);
}
// Function Specification
//
// Name: reset_state_request
//
// Description: Request Reset States
//
// End Function Specification
void reset_state_request(uint8_t i_request)
{
//TODO: This needs to be changed so that G_reset_state operations are
// atomic.
switch(i_request)
{
case RESET_REQUESTED_DUE_TO_ERROR:
// In case we want to just halt() if fw requests a reset, this is
// the place to do it. It is disabled by default, and there is no
// code to eanble it.
if( G_halt_on_reset_request )
{
TRAC_ERR("Halt()");
// This isn't modeled very well in simics. OCC will go into an
// infinite loop, which eventually would crash Simics.
HALT_WITH_FIR_SET;
}
// If we have TMGT comm, and we aren't already in reset, set the reset
// state to reset to enter the reset state machine.
if(G_reset_state < RESET_REQUESTED_DUE_TO_ERROR)
{
TRAC_IMP("Activating reset required state.");
G_reset_state = RESET_REQUESTED_DUE_TO_ERROR;
// Post the semaphore to wakeup the thread that
// will put us into SAFE state.
// TEMP -- THIS THREAD ISN"T ACTUALLY RUNNING IN PHASE1
// ssx_semaphore_post(&G_dcomThreadWakeupSem);
// Set RTL Flags here too, depending how urgent it is that we stop
// running tasks.
rtl_set_run_mask(RTL_FLAG_RST_REQ);
}
break;
case NOMINAL_REQUESTED_DUE_TO_ERROR:
if(G_reset_state < NOMINAL_REQUESTED_DUE_TO_ERROR)
{
TRAC_ERR("Going to Nominal because of error");
// May need to add counter if multiple places request nominal
G_reset_state = NOMINAL_REQUESTED_DUE_TO_ERROR;
//TODO: Will need to set some flag or event here
}
break;
case RESET_NOT_REQUESTED:
if(G_reset_state == NOMINAL_REQUESTED_DUE_TO_ERROR)
{
TRAC_IMP("Clearing Nominal Reset State because of error");
// May need to add counter check if multiple places request nominal
G_reset_state = RESET_NOT_REQUESTED;
//TODO: Will need to clear some flag or event here
}
break;
default:
break;
}
}
// Function Specification
//
// Name: task_check_for_checkstop
//
// Description: Check for checkstop
//
// End Function Specification
void task_check_for_checkstop(task_t *i_self)
{
// TEMP -- NO MORE PORE
// pore_status_t l_gpe0_status;
ocb_oisr0_t l_oisr0_status;
static bool L_checkstop_traced = FALSE;
uint8_t l_reason_code = 0;
do
{
// This check is disabled once a checkstop or frozen GPE is detected
if(L_checkstop_traced)
{
break;
}
// Looked for a frozen GPE, a sign that the chip has stopped working or
// check-stopped. This check also looks for an interrupt status flag that
// indicates if the system has check-stopped.
/* TEMP -- NO MORE PORE / check_stop field no longer exists
l_gpe0_status.value = in64(PORE_GPE0_STATUS);
l_oisr0_status.value = in32(OCB_OISR0);
if (l_gpe0_status.fields.freeze_action
||
l_oisr0_status.fields.check_stop)
{
errlHndl_t l_err = NULL;
if (l_gpe0_status.fields.freeze_action)
{
TRAC_IMP("Frozen GPE0 detected by RTL");
l_reason_code = OCC_GPE_HALTED;
}
if (l_oisr0_status.fields.check_stop)
{
TRAC_IMP("System checkstop detected by RTL");
l_reason_code = OCC_SYSTEM_HALTED;
}
L_checkstop_traced = TRUE;
/*
* @errortype
* @moduleid MAIN_SYSTEM_HALTED_MID
* @reasoncode OCC_GPE_HALTED
* @userdata1 High order word of PORE_GPE0_STATUS
* @userdata2 OCB_OISR0
* @devdesc OCC detected frozen GPE0
*/
/*
* @errortype
* @moduleid MAIN_SYSTEM_HALTED_MID
* @reasoncode OCC_SYSTEM_HALTED
* @userdata1 High order word of PORE_GPE0_STATUS
* @userdata2 OCB_OISR0
* @devdesc OCC detected system checkstop
*/ /*
l_err = createErrl(MAIN_SYSTEM_HALTED_MID,
l_reason_code,
OCC_NO_EXTENDED_RC,
ERRL_SEV_INFORMATIONAL,
NULL,
DEFAULT_TRACE_SIZE,
l_gpe0_status.words.high_order,
l_oisr0_status.value);
// The commit code will check for the frozen GPE0 and system
// checkstop conditions and take appropriate actions.
commitErrl(&l_err);
}
*/
}
while(0);
}
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