From 8fc37a704410cbbcb516e7b7958ebd586d710806 Mon Sep 17 00:00:00 2001 From: Dan Crowell Date: Mon, 4 Mar 2019 12:37:37 -0600 Subject: Create p9a_disable_ocmb_i2c HWP 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 Tested-by: Jenkins Server Reviewed-by: SANTOSH BALASUBRAMANIAN Reviewed-by: Harika Vayagundla Reviewed-by: Jennifer A. Stofer Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/74757 Tested-by: Jenkins OP Build CI Tested-by: Jenkins OP HW Reviewed-by: Christian R. Geddes --- .../procedures/hwp/memory/p9a_disable_ocmb_i2c.C | 83 ++++++++++++++++++++++ .../procedures/hwp/memory/p9a_disable_ocmb_i2c.H | 62 ++++++++++++++++ .../procedures/hwp/memory/p9a_disable_ocmb_i2c.mk | 26 +++++++ 3 files changed, 171 insertions(+) create mode 100644 src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.C create mode 100644 src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.H create mode 100644 src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.mk (limited to 'src/import/chips/p9a') diff --git a/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.C b/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.C new file mode 100644 index 000000000..8045702d0 --- /dev/null +++ b/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.C @@ -0,0 +1,83 @@ +/* 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 +// *HWP HW Backup Owner : Srinivas V Naga +// *HWP FW Owner : Dan Crowell +// *HWP Team : Perv +// *HWP Level : 3 +// *HWP Consumed by : HB +//------------------------------------------------------------------------------ + +#include +#include +#include +#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& i_proc, + bool i_force ) +{ + FAPI_INF("p9a_disable_ocmb_i2c : Entering ..."); + + fapi2::buffer 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(); + + 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; + +} diff --git a/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.H b/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.H new file mode 100644 index 000000000..e2703113f --- /dev/null +++ b/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.H @@ -0,0 +1,62 @@ +/* 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 +// *HWP HW Backup Owner : Srinivas V Naga +// *HWP FW Owner : Dan Crowell +// *HWP Team : Perv +// *HWP Level : 3 +// *HWP Consumed by : HB +//------------------------------------------------------------------------------ + +#ifndef P9A_DISABLE_OCMB_I2C_H_ +#define P9A_DISABLE_OCMB_I2C_H_ + +#include + + +typedef fapi2::ReturnCode (*p9a_disable_ocmb_i2c_FP_t) ( const fapi2::Target& 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& i_proc, + bool i_force = false ); + +} +#endif diff --git a/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.mk b/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.mk new file mode 100644 index 000000000..fa00ba970 --- /dev/null +++ b/src/import/chips/p9a/procedures/hwp/memory/p9a_disable_ocmb_i2c.mk @@ -0,0 +1,26 @@ +# 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) -- cgit v1.2.1