diff options
Diffstat (limited to 'src/ppe/pk/ppe42/ppe42_scom.c')
| -rwxr-xr-x | src/ppe/pk/ppe42/ppe42_scom.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/ppe/pk/ppe42/ppe42_scom.c b/src/ppe/pk/ppe42/ppe42_scom.c new file mode 100755 index 0000000..20da4df --- /dev/null +++ b/src/ppe/pk/ppe42/ppe42_scom.c @@ -0,0 +1,101 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/ppe/pk/ppe42/ppe42_scom.c $ */ +/* */ +/* OpenPOWER OnChipController Project */ +/* */ +/* Contributors Listed Below - COPYRIGHT 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 */ +//----------------------------------------------------------------------------- +// *! (C) Copyright International Business Machines Corp. 2015 +// *! All Rights Reserved -- Property of IBM +// *! *** IBM Confidential *** +//----------------------------------------------------------------------------- + +/// \file ppe42_scom.c +/// \brief Lowest level PK SCOM definitions. +/// +/// Currently these SCOM functions are only optimized for functionality, not +/// speed. Speed optimization will be done when we have full compiler support +/// for the low-level stvd and lvd SCOM OPs. +/// +/// A FAPI-lite SCOM can call these PK SCOM functions. +/// +/// Comment: +/// - No need to poll for SCOM completion, nor return error code of SCOM fails. +/// A SCOM fail will cause the GPE to hang if configured to do so. But do we +/// necessarily have to do this? Wouldn't a gentle recovery from a SCOM fail +/// be preferred? + +#include "pk.h" +#include "ppe42_scom.h" +#include "ppe42_msr.h" + + +uint32_t putscom_abs(const uint32_t i_address, uint64_t *i_data) +{ + + // Perform the Store Virtual Double instruction + PPE_STVD(i_address, &i_data); + + // Get the MSR[SIBRC] as the return code + uint32_t rc = mfmsr(); + rc = ((rc & MSR_SIBRC) >> (32-(MSR_SIBRC_START_BIT + MSR_SIBRC_LEN))); + return (rc); + +} + +uint32_t _putscom( uint32_t i_chiplet_id, uint32_t i_address, uint64_t *i_data) +{ + + // Perform the Store Virtual Double Index instruction + PPE_STVDX(i_chiplet_id, i_address, &i_data); + + // Get the MSR[SIBRC] as the return code + uint32_t rc = mfmsr(); + rc = ((rc & MSR_SIBRC) >> (32-(MSR_SIBRC_START_BIT + MSR_SIBRC_LEN))); + return (rc); + +} + +uint32_t getscom_abs( const uint32_t i_address, uint64_t *o_data) +{ + + // Perform the Load Virtual Double instruction + PPE_LVD(i_address, &o_data); + + // Get the MSR[SIBRC] as the return code + uint32_t rc = mfmsr(); + rc = ((rc & MSR_SIBRC) >> (32-(MSR_SIBRC_START_BIT + MSR_SIBRC_LEN))); + return (rc); +} + + +uint32_t _getscom( const uint32_t i_chiplet_id, const uint32_t i_address, uint64_t *o_data) +{ + + // Perform the Load Virtual Double Index instruction + PPE_LVDX(i_chiplet_id, i_address, &o_data); + + // Get the MSR[SIBRC] as the return code + uint32_t rc = mfmsr(); + rc = ((rc & MSR_SIBRC) >> (32-(MSR_SIBRC_START_BIT + MSR_SIBRC_LEN))); + return (rc); + +} |
