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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/sbefw/core/chipop_handler.C $ */
/* */
/* OpenPOWER sbe Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2017,2018 */
/* [+] 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 "sbetrace.H"
#include "sbe_sp_intf.H"
#include "sbestates.H"
#include "sberegaccess.H"
#include "sbeglobals.H"
#include "chipop_handler.H"
////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////
uint8_t sbeGetCmdStructAttr (const uint8_t i_cmdClass,
cmdStruct_t **o_ppCmd)
{
#define SBE_FUNC " sbeGetCmdStructAttr "
uint8_t l_numCmds = 0;
*o_ppCmd = NULL;
size_t cmdClassIndex = HASH_KEY(i_cmdClass);
if(cmdClassIndex < cmdClassTable.len &&
cmdClassTable.cmdClassArr[cmdClassIndex].cmdTable)
{
l_numCmds = cmdClassTable.cmdClassArr[cmdClassIndex].cmdTable->len;
*o_ppCmd = cmdClassTable.cmdClassArr[cmdClassIndex].cmdTable->cmdArr;
}
return l_numCmds;
#undef SBE_FUNC
}
////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////
uint8_t sbeValidateCmdClass (const uint8_t i_cmdClass,
const uint8_t i_cmdOpcode)
{
#define SBE_FUNC " sbeValidateCmdClass "
uint8_t l_rc = SBE_SEC_COMMAND_NOT_SUPPORTED;
SBE_INFO(SBE_FUNC"i_cmdClass[0x%02X], "
"i_cmdOpcode[0x%02X]", i_cmdClass, i_cmdOpcode);
do
{
uint8_t l_numCmds = 0;
cmdStruct_t *l_pCmd = NULL;
l_numCmds = sbeGetCmdStructAttr (i_cmdClass, &l_pCmd);
if (!l_numCmds)
{
SBE_ERROR(SBE_FUNC"SBE_SEC_COMMAND_CLASS_NOT_SUPPORTED "
"i_cmdClass[0x%02X], i_cmdOpcode[0x%02X]",
i_cmdClass, i_cmdOpcode);
// Command class not supported
l_rc = SBE_SEC_COMMAND_CLASS_NOT_SUPPORTED;
break;
}
// @TODO via RTC : 128654
// Analyze on merging the validation functions into one
// and also on using loop vs switch case performance
for (uint8_t l_cnt = 0; l_cnt < l_numCmds; ++l_cnt, ++l_pCmd)
{
if (i_cmdOpcode == l_pCmd->cmd_opcode)
{
// Command found
l_rc = SBE_SEC_OPERATION_SUCCESSFUL;
break;
}
}
} while (false);
return l_rc;
#undef SBE_FUNC
}
sbeCmdFunc_t sbeFindCmdFunc (const uint8_t i_cmdClass,
const uint8_t i_cmdOpcode)
{
#define SBE_FUNC " sbeFindCmdFunc "
uint8_t l_numCmds = 0;
cmdStruct_t *l_pCmd = NULL;
l_numCmds = sbeGetCmdStructAttr (i_cmdClass, &l_pCmd);
for (uint8_t l_cnt = 0; l_cnt < l_numCmds; ++l_cnt, ++l_pCmd)
{
if (i_cmdOpcode == l_pCmd->cmd_opcode)
{
break;
}
}
return l_pCmd ? (l_pCmd->cmd_func) : NULL;
#undef SBE_FUNC
}
sbeChipOpRc_t sbeIsCmdAllowed (const uint8_t i_cmdClass,
const uint8_t i_cmdOpcode)
{
#define SBE_FUNC " sbeIsCmdAllowedAtState "
bool l_ret = true;
sbeChipOpRc_t retRc;
uint8_t l_numCmds = 0;
cmdStruct_t *l_pCmd = NULL;
l_numCmds = sbeGetCmdStructAttr (i_cmdClass, &l_pCmd);
for (uint8_t l_cnt = 0; l_cnt < l_numCmds; ++l_cnt, ++l_pCmd)
{
if (i_cmdOpcode == l_pCmd->cmd_opcode)
{
// Get the Present State
uint64_t l_state =
SbeRegAccess::theSbeRegAccess().getSbeState();
SBE_INFO(SBE_FUNC "SBE State [0x%08X] Fence State[0x%04X]",
(uint32_t)(l_state & 0xFFFFFFFF),l_pCmd->cmd_state_fence);
switch(l_state)
{
case SBE_STATE_UNKNOWN:
case SBE_STATE_FAILURE:
// All operations are fenced here, return false
// Reset is the only Option available
break;
case SBE_STATE_IPLING:
{
l_ret = ((l_pCmd->cmd_state_fence &
SBE_FENCE_AT_CONTINUOUS_IPL)? false:true);
break;
}
case SBE_STATE_ISTEP:
{
l_ret = ((l_pCmd->cmd_state_fence &
SBE_FENCE_AT_ISTEP)? false:true);
break;
}
case SBE_STATE_RUNTIME:
{
l_ret = ((l_pCmd->cmd_state_fence &
SBE_FENCE_AT_RUNTIME)? false:true);
break;
}
case SBE_STATE_DUMP:
{
l_ret = ((l_pCmd->cmd_state_fence &
SBE_FENCE_AT_DUMPING)? false:true);
break;
}
case SBE_STATE_MPIPL:
{
l_ret = ((l_pCmd->cmd_state_fence &
SBE_FENCE_AT_MPIPL)? false:true);
break;
}
case SBE_STATE_DMT:
{
l_ret = ((l_pCmd->cmd_state_fence &
SBE_FENCE_AT_DMT)? false:true);
break;
}
case SBE_STATE_QUIESCE:
{
// fence off all the chip-ops in quiesce state
l_ret = false;
break;
}
default:
l_ret = false;
break;
}
if(false == l_ret)
{
retRc.primStatus = SBE_PRI_INVALID_COMMAND;
retRc.secStatus = SBE_SEC_COMMAND_NOT_ALLOWED_IN_THIS_STATE;
break;
}
// Check if the command is allowed in current security mode
if((SBE_GLOBAL->sbeFWSecurityEnabled)
&& (SBE_FENCE_AT_SECURE_MODE & l_pCmd->cmd_state_fence)
&& (!SBE::isSimicsRunning()))
{
retRc.primStatus = SBE_PRI_UNSECURE_ACCESS_DENIED;
retRc.secStatus = SBE_SEC_BLACKLISTED_CHIPOP_ACCESS;
break;
}
break;
}
}
// For any other state, which is not handled above, return from here
return retRc;
#undef SBE_FUNC
}
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