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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/initservice/istepdispatcher/sptask.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2012,2014 */
/* */
/* 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 */
/**
* @file sptask.C
*
* SP / SPless task detached from IStep Dispatcher.
* Handles
*
*/
/******************************************************************************/
// Includes
/******************************************************************************/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/task.h> // tid_t, task_create, etc
#include <sys/time.h> // nanosleep
#include <sys/msg.h> // message Q's
#include <mbox/mbox_queues.H> // MSG_HB_MSG_BASE
#include <trace/interface.H> // trace support
#include <errl/errlentry.H> // errlHndl_t
#include <initservice/initsvcudistep.H> // InitSvcUserDetailsIstep
#include <initservice/taskargs.H> // TASK_ENTRY_MACRO
#include <targeting/common/util.H> //
#include "istepdispatcher.H"
#include "splesscommon.H"
#include "istep_mbox_msgs.H"
namespace INITSERVICE
{
using namespace ERRORLOG; // IStepNameUserDetails
using namespace SPLESS; // SingleStepMode
using namespace TARGETING; //
/******************************************************************************/
// Globals/Constants
/******************************************************************************/
extern trace_desc_t *g_trac_initsvc;
/**
* @const SPLess PAUSE - These two constants are used in a nanosleep() call
* below to sleep between polls of the StatusReg. Typically this will
* be about 10 ms - the actual value will be determined empirically.
*/
const uint64_t SINGLESTEP_PAUSE_S = 0;
const uint64_t SINGLESTEP_PAUSE_NS = 10000000;
/**
* @brief userConsoleComm
*
* Communicate with User Console on VPO or Simics.
* Forwards commands to HostBoot (IStep Dispatcher) via a message Q.
* Forwards status from HostBoot to VPO or Simics user console.
*
* Stop and wait for the user console to send the next IStep to run.
* Run that, then wait for the next one.
*
* @param[in,out] - pointer to a message Q, passed in by the parent
*
* @return none
*/
void userConsoleComm( void * io_msgQ )
{
SPLessCmd l_cmd;
SPLessSts l_sts;
uint8_t l_seqnum = 0;
int l_sr_rc = 0;
msg_q_t l_SendMsgQ = static_cast<msg_q_t>( io_msgQ );
msg_t *l_pMsg = msg_allocate();
msg_q_t l_RecvMsgQ = msg_q_create();
msg_t *l_pCurrentMsg = NULL;
TRACFCOMP( g_trac_initsvc,
"userConsoleComm entry, args=%p",
io_msgQ );
// initialize command reg
l_cmd.val64 = 0;
writeCmd( l_cmd );
// init status reg, enable ready bit
l_sts.val64 = 0;
l_sts.hdr.readybit = true;
writeSts( l_sts );
TRACFCOMP( g_trac_initsvc,
"userConsoleComm : readybit set." );
// set Current to our message on entry
l_pCurrentMsg = l_pMsg;
//
// Start the polling loop.
//
while( 1 )
{
// read command register from user console
readCmd( l_cmd );
// process any pending commands
if ( l_cmd.hdr.gobit )
{
l_cmd.hdr.readbit = 1;
writeCmd( l_cmd );
// get the sequence number from caller
l_seqnum = l_cmd.hdr.seqnum;
// clear status
l_sts.val64 = 0;
// set running bit, fill in istep and substep
l_sts.hdr.runningbit = true;
l_sts.hdr.readybit = true;
// @todo modify hb-istep to check both running bit and seqnum
// l_sts.hdr.seqnum = l_seqnum;
l_sts.istep = l_cmd.istep;
l_sts.substep = l_cmd.substep;
// write the intermediate value back to the console.
TRACDCOMP( g_trac_initsvc,
"userConsoleComm Write status (running) 0x%x.%x",
static_cast<uint32_t>( l_sts.val64 >> 32 ),
static_cast<uint32_t>( l_sts.val64 & 0x0ffffffff ) );
writeSts( l_sts );
// pass the command on to IstepDisp, block until reply
l_pCurrentMsg->type = ISTEP_MSG_TYPE;
l_pCurrentMsg->data[0] =
( ( static_cast<uint64_t>(l_cmd.istep & 0xFF) << 32) |
( static_cast<uint64_t>(l_cmd.substep & 0xFF ) ) );
l_pCurrentMsg->data[1] = 0;
l_pCurrentMsg->extra_data = NULL;
TRACDCOMP( g_trac_initsvc,
"userConsoleComm: sendmsg type=0x%08x, d0=0x%16x, d1=0x%16x, x=%p",
l_pCurrentMsg->type,
l_pCurrentMsg->data[0],
l_pCurrentMsg->data[1],
l_pCurrentMsg->extra_data );
//
// msg_sendrecv_noblk effectively splits the "channel" into
// a send Q and a receive Q
//
l_sr_rc = msg_sendrecv_noblk( l_SendMsgQ, l_pCurrentMsg, l_RecvMsgQ );
// should never happen.
assert( l_sr_rc == 0 );
// This should unblock on any message sent on the Q,
l_pCurrentMsg = msg_wait( l_RecvMsgQ );
// build status to return to console
l_sts.istep = l_cmd.istep;
l_sts.substep = l_cmd.substep;
l_sts.hdr.status = 0;
// Clear command reg when the command is done
TRACDCOMP( g_trac_initsvc,
"userConsoleComm Clear Command reg" );
l_cmd.val64 = 0;
writeCmd( l_cmd );
TRACDCOMP( g_trac_initsvc,
"userConsoleComm: rcvmsg type=0x%08x, d0=0x%16x, d1=0x%16x, x=%p",
l_pCurrentMsg->type,
l_pCurrentMsg->data[0],
l_pCurrentMsg->data[1],
l_pCurrentMsg->extra_data );
if ( l_pCurrentMsg->type == BREAKPOINT )
{
l_sts.hdr.status = SPLESS_AT_BREAK_POINT;
}
// istep status is the hi word in the returned data 0
// this should be either 0 or a plid from a returned errorlog
l_sts.istepStatus =
static_cast<uint32_t>( l_pCurrentMsg->data[0] >> 32 );
// finish filling in status
l_sts.hdr.runningbit = false;
l_sts.hdr.seqnum = l_seqnum;
TRACDCOMP( g_trac_initsvc,
"userConsoleComm Write (finished) status 0x%x.%x",
static_cast<uint32_t>( l_sts.val64 >> 32 ),
static_cast<uint32_t>( l_sts.val64 & 0x0ffffffff ) );
writeSts( l_sts );
// clear command reg, including go bit (i.e. set to false)
// 2012-04-27 hb-istep will clear the command reg after it sees
// the running bit turn on.
// Please save the following in case we have to turn this
// back on.
} // endif gobit
// sleep, and wait for user to give us something else to do.
if( TARGETING::is_vpo() )
{
// In VPO/VBU, yield the task, any real delay takes too long
task_yield();
}
else
{
nanosleep( SINGLESTEP_PAUSE_S, SINGLESTEP_PAUSE_NS );
}
} // endwhile
TRACFCOMP( g_trac_initsvc,
"sptask: Uh-oh, we just exited... what went wrong?" );
// @note
// Fell out of loop, clear sts reg and turn off readybit
// disable the ready bit so the user knows.
l_sts.val64 = 0;
l_sts.hdr.status = SPLESS_TASKRC_TERMINATED;
l_sts.hdr.seqnum = l_seqnum;
writeSts( l_sts );
TRACFCOMP( g_trac_initsvc,
"userConsoleComm exit" );
// free the message struct
msg_free( l_pMsg );
// return to main to end task
}
void* spTask( void *io_pArgs )
{
TRACFCOMP( g_trac_initsvc,
"spTask entry, args=%p",
io_pArgs );
// IStepDisp should not expect us to come back.
task_detach();
// Start talking to VPO / Simics User console.
userConsoleComm( io_pArgs );
TRACFCOMP( g_trac_initsvc,
"spTask exit." );
// End the task.
return NULL;
}
} // namespace
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