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Create p9a_disable_ocmb_i2c HWP
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Adding a procedure to disable i2c access to the OCMB.

Change-Id: Ia7e7a893aa29e90a7372595205abdaff2477d1af
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/72781
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: SANTOSH BALASUBRAMANIAN <sbalasub@in.ibm.com>
Reviewed-by: Harika Vayagundla <havayagu@in.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/74757
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
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dcrowell77 authored and crgeddes committed Mar 21, 2019
1 parent 6bdf34b commit 8fc37a7
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83 changes: 83 additions & 0 deletions src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.C
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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2019 */
/* [+] 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 */

//------------------------------------------------------------------------------
///
/// @file p9a_disable_ocmb_i2c.H
/// @brief Enable the security block for i2c access to the OCMB devices
///
//------------------------------------------------------------------------------
// *HWP HW Owner : Santosh Balasubramanian <sbalasub@in.ibm.com>
// *HWP HW Backup Owner : Srinivas V Naga <srinivan@in.ibm.com>
// *HWP FW Owner : Dan Crowell <dcrowell@us.ibm.com>
// *HWP Team : Perv
// *HWP Level : 3
// *HWP Consumed by : HB
//------------------------------------------------------------------------------

#include <fapi2.H>
#include <p9_misc_scom_addresses.H>
#include <p9_misc_scom_addresses_fld.H>
#include "p9a_disable_ocmb_i2c.H"


///
/// @brief Enable the security block for i2c access to the OCMB devices
///
fapi2::ReturnCode p9a_disable_ocmb_i2c( const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_proc,
bool i_force )
{
FAPI_INF("p9a_disable_ocmb_i2c : Entering ...");

fapi2::buffer<uint64_t> l_data64;
bool l_in_secure_mode = false;

//Get value of SAB bit to see if chip is in secure mode
FAPI_TRY(fapi2::getScom(i_proc, PU_SECURITY_SWITCH_REGISTER_SCOM, l_data64));

l_in_secure_mode = l_data64.getBit<PU_SECURITY_SWITCH_REGISTER_SECURE_ACCESS>();

if ((l_in_secure_mode == 1) || (i_force)) //Chip in Secure mode or override with i_force parameter
{
//SECURITY_SWITCH_REGISTER is SET only register - hence clearing '0' before setting specific bits
//To Avoid the issue of a read modified write
l_data64.flush<0>();

//13 : SECURITY_SWITCH_SECURE_OCMB_LOCK: TP Spare
l_data64.setBit<13>();

FAPI_TRY(fapi2::putScom(i_proc, PU_SECURITY_SWITCH_REGISTER_SCOM, l_data64));
}
else
{
FAPI_INF("Chip not in secure mode - No need to disable i2c access");
}

FAPI_INF("p9a_disable_ocmb_i2c : Exiting ...");

fapi_try_exit:
return fapi2::current_err;

}
62 changes: 62 additions & 0 deletions src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.H
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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2019 */
/* [+] 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 */

//------------------------------------------------------------------------------
///
/// @file p9a_disable_ocmb_i2c.H
/// @brief Enable the security block for i2c access to the OCMB devices if
/// security is enabled in the processor (SAB bit).
///
//------------------------------------------------------------------------------
// *HWP HW Owner : Santosh Balasubramanian <sbalasub@in.ibm.com>
// *HWP HW Backup Owner : Srinivas V Naga <srinivan@in.ibm.com>
// *HWP FW Owner : Dan Crowell <dcrowell@us.ibm.com>
// *HWP Team : Perv
// *HWP Level : 3
// *HWP Consumed by : HB
//------------------------------------------------------------------------------

#ifndef P9A_DISABLE_OCMB_I2C_H_
#define P9A_DISABLE_OCMB_I2C_H_

#include <fapi2.H>


typedef fapi2::ReturnCode (*p9a_disable_ocmb_i2c_FP_t) ( const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_proc,
bool i_force );

extern "C"
{
///
/// @brief Enable the security block for i2c access to the OCMB devices
/// @param[in] i_proc the processor target to operate on
/// @param[in] i_force force the block regardless of security settings
/// @return FAPI2_RC_SUCCESS iff ok
///
fapi2::ReturnCode p9a_disable_ocmb_i2c( const fapi2::Target<fapi2::TARGET_TYPE_PROC_CHIP>& i_proc,
bool i_force = false );

}
#endif
26 changes: 26 additions & 0 deletions src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.mk
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# IBM_PROLOG_BEGIN_TAG
# This is an automatically generated prolog.
#
# $Source: src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.mk $
#
# OpenPOWER HostBoot Project
#
# Contributors Listed Below - COPYRIGHT 2019
# [+] 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
PROCEDURE=p9a_disable_ocmb_i2c
$(call BUILD_PROCEDURE)

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