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Diffstat (limited to 'src/usr/util/utilsemipersist.C')
| -rw-r--r-- | src/usr/util/utilsemipersist.C | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/usr/util/utilsemipersist.C b/src/usr/util/utilsemipersist.C new file mode 100644 index 000000000..28ce93936 --- /dev/null +++ b/src/usr/util/utilsemipersist.C @@ -0,0 +1,136 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/usr/util/utilsemipersist.C $ */ +/* */ +/* OpenPOWER HostBoot Project */ +/* */ +/* Contributors Listed Below - COPYRIGHT 2016,2017 */ +/* [+] 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 utilsemipersist.C + * + * @brief Abstraction of semi volatile pnor partition + * + * Used for creating and manipulating streams + */ + +/*****************************************************************************/ +// I n c l u d e s +/*****************************************************************************/ +#include <trace/interface.H> +#include <limits.h> +#include <util/util_reasoncodes.H> +#include <errl/errlentry.H> +#include <errl/errlmanager.H> +#include <pnor/pnorif.H> +#include <sys/mm.h> +#include <util/utilsemipersist.H> +#include "utilbase.H" +trace_desc_t* g_trac_persist = nullptr; +TRAC_INIT(&g_trac_persist, "UTIL_PERSIST", KILOBYTE); + +using namespace ERRORLOG; + +namespace Util +{ + + // ---------------------------------------------- + // Globals + // ---------------------------------------------- + mutex_t g_PersistMutex = MUTEX_INITIALIZER; + + semiPersistData_t * getHbVolatile() + { + errlHndl_t l_err = nullptr; + uint64_t l_vaddr = 0x0; + static uint64_t g_HbVolatileAddr = 0x0; + + do + { + if(g_HbVolatileAddr) + { + l_vaddr = g_HbVolatileAddr; + break; + } + + PNOR::SectionInfo_t l_pnorHbVolatile; + l_err = PNOR::getSectionInfo(PNOR::HB_VOLATILE, l_pnorHbVolatile); + if(l_err) + { + delete l_err; + l_err = nullptr; + TRACFCOMP( g_trac_persist, + INFO_MRK"getHbVolatile(): HB_VOLATILE section not" + " found, it is optional"); + break; + } + if(l_pnorHbVolatile.size == 0) + { + TRACFCOMP( g_trac_persist, + INFO_MRK"getHbVolatile(): HB_VOLATILE section is" + " empty in PNOR"); + break; + } + + g_HbVolatileAddr = l_pnorHbVolatile.vaddr; + l_vaddr = g_HbVolatileAddr; + + }while(0); + + return reinterpret_cast<semiPersistData_t*>(l_vaddr); + } + + void readSemiPersistData(semiPersistData_t & o_data) + { + memset(&o_data, 0x0, sizeof(semiPersistData_t)); + + //Lock to prevent concurrent access + mutex_lock(&g_PersistMutex); + + auto l_data = getHbVolatile(); + if(l_data) + { + o_data = *l_data; + } + + mutex_unlock(&g_PersistMutex); + } + + void writeSemiPersistData(const semiPersistData_t i_data) + { + //Lock to prevent concurrent access + mutex_lock(&g_PersistMutex); + + auto l_data = getHbVolatile(); + if(l_data) + { + *l_data = i_data; + int l_rc = mm_remove_pages(FLUSH, l_data, + sizeof(semiPersistData_t)); + if (l_rc) + { + TRACFCOMP(g_trac_persist, + ERR_MRK"writeSemiPersistData(): mm_remove_pages" + "(FLUSH,%p,%d) returned %d",l_data, + sizeof(semiPersistData_t),l_rc); + } + } + mutex_unlock(&g_PersistMutex); + } +}; |
