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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/nvram/nvram_interface.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 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 <nvram/nvram_interface.H>
#include <nvram/import/nvram.h>
#include <nvram/nvram_reasoncodes.H>
#include <pnor/pnorif.H>
static bool g_is_nvram_checked = false;
namespace NVRAM_TRACE
{
trace_desc_t * g_trac_nvram = nullptr;
// NVRAM won't be read too often in hostboot, so 1KB should be enough.
TRAC_INIT(&g_trac_nvram, NVRAM_COMP_NAME, KILOBYTE);
}
namespace NVRAM
{
const char TEST_KEY[] = "test";
const char SMF_MEM_AMT_KEY[] = "smf_mem_amt";
/*
* @brief Searches NVRAM partition for the i_key and puts the value in
* o_val. An error is returned if NVRAM can't be loaded or if
* it's formatted incorrectly.
*/
errlHndl_t nvramRead(const char* const i_key, const char*& o_val)
{
errlHndl_t l_errl = nullptr;
do {
if(i_key == nullptr)
{
/*@ errorlog
* @errortype ERRL_SEV_UNRECOVERABLE
* @moduleid NVRAM::MOD_NVRAM_READ
* @reasoncode NVRAM::RC_NVRAM_READ_NULL_KEY
* @devdesc A nullptr was passed for i_key to nvramRead
* @custdesc Error occurred during system boot.
*/
l_errl = new ERRORLOG::ErrlEntry(ERRORLOG::ERRL_SEV_UNRECOVERABLE,
NVRAM::MOD_NVRAM_READ,
NVRAM::RC_NVRAM_READ_NULL_KEY,
0,
0);
break;
}
if(!g_is_nvram_checked)
{
PNOR::SectionInfo_t l_nvramSectionInfo;
l_errl = PNOR::getSectionInfo(PNOR::NVRAM, l_nvramSectionInfo);
if(l_errl)
{
break;
}
// Skiboot function to check NVRAM for integrity.
// This function will also populate the inner skiboot_part_hdr
// pointer to point to the start of the NVRAM. nvram_query will
// then attempt to index into skiboot_part_hdr to find the K/V
// pairs.
int l_rc = nvram_check(
reinterpret_cast<uint8_t*>(l_nvramSectionInfo.vaddr),
l_nvramSectionInfo.size);
if(l_rc)
{
/*@ errorlog
* @errortype ERRL_SEV_INFORMATIONAL
* @moduleid NVRAM::MOD_NVRAM_READ
* @reasoncode NVRAM::RC_NVRAM_CHECK_FAILED
* @userdata1 rc from nvram_check
* @userdata2 NVRAM virtual address
* @devdesc nvram_check failed during an attempt to read the
* NVRAM PNOR partition.
* @custdesc Error occurred during system boot.
*/
l_errl = new ERRORLOG::ErrlEntry(ERRORLOG::ERRL_SEV_INFORMATIONAL,
NVRAM::MOD_NVRAM_READ,
NVRAM::RC_NVRAM_CHECK_FAILED,
l_rc,
l_nvramSectionInfo.vaddr);
l_errl->collectTrace(NVRAM_COMP_NAME);
l_errl->collectTrace(PNOR_COMP_NAME);
break;
}
g_is_nvram_checked = true;
}
o_val = nvram_query(i_key);
}while(0);
return l_errl;
}
} // namespace NVRAM
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