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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/bootloader/bl_pnorAccess.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015,2016 */
/* [+] 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 <bootloader/bl_pnorAccess.H>
#include <bootloader/bootloader_trace.H>
#include <util/singleton.H>
#include <bootloader/bootloader.H>
#ifdef PNORUTILSTEST_H
#define BOOTLOADER_TRACE(args) TRACFCOMP(g_trac_pnor,"##args")
#define BOOTLOADER_TRACE_W_BRK(args) TRACFCOMP(g_trac_pnor,"##args")
#endif
extern const char* cv_EYECATCHER[];
/**
* @brief Takes in a buffer containing a ToC, as well as a base address
Returns out a boolean whether or not this toc was valid
also returns a SectionData_t struct if the toc was valid
*/
void bl_pnorAccess::readTOC(uint8_t i_tocBuffer[PNOR::TOC_SIZE],
uint32_t& o_errCode,
PNOR::SectionData_t * o_TOC,
uint64_t& o_pnorStart,
uint64_t i_pnorEnd)
{
do
{
o_errCode = PNOR::NO_ERROR;
ffs_hdr* l_ffs_hdr = NULL;
//zero out the section data for each section
PNOR::initializeSections(o_TOC);
BOOTLOADER_TRACE(BTLDR_TRC_PA_READTOC_ZEROSECTION_RTN);
//make sure that the buffer is not null
PNOR::checkForNullBuffer(i_tocBuffer, o_errCode, l_ffs_hdr);
//Subtract the size of the pnor from the end address to find the start
o_pnorStart = i_pnorEnd -
(l_ffs_hdr->block_size * l_ffs_hdr->block_count) + 1;
if(o_errCode != PNOR::NO_ERROR)
{
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_READTOC_CHKNULLBUFFER_NULL);
break;
}
BOOTLOADER_TRACE(BTLDR_TRC_PA_READTOC_CHECKNULLBUFFER_RTN);
//Do a checksum on the header
if(PNOR::pnor_ffs_checksum(l_ffs_hdr, FFS_HDR_SIZE) != 0)
{
o_errCode |= PNOR::CHECKSUM_ERR;
}
if(o_errCode != PNOR::NO_ERROR)
{
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_READTOC_HDRCHECKSUM_ERR);
break;
}
BOOTLOADER_TRACE(BTLDR_TRC_PA_READTOC_HDRCHECKSUM_RTN);
//Check out the header to make sure its all valid
PNOR::checkHeader(l_ffs_hdr, o_errCode);
if(o_errCode != PNOR::NO_ERROR)
{
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_READTOC_CHECKHEADER_ERR);
break;
}
BOOTLOADER_TRACE(BTLDR_TRC_PA_READTOC_CHECKHEADER_RTN);
//if an error is found with an entry we use this variable to hold
//the value of the entry. That way we can record which entry is causing
//an issue.
ffs_entry* l_err_entry = NULL;
//parse through the entries and check for any errors
PNOR::parseEntries(l_ffs_hdr, o_errCode, o_TOC, l_err_entry);
if(o_errCode != PNOR::NO_ERROR)
{
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_READTOC_PARSEENTRIES_ERR);
break;
}
BOOTLOADER_TRACE(BTLDR_TRC_PA_READTOC_PARSEENTRIES_RTN);
} while(0);
}
void bl_pnorAccess::findTOC(uint64_t i_pnorEnd, PNOR::SectionData_t * o_TOC,
uint32_t& o_errCode, uint8_t& o_tocUsed,
uint64_t& o_pnorStart)
{
uint8_t *l_tocBuffer = Bootloader::g_blScratchSpace;
do
{
//@TODO RTC:138268 Set up multiple side of PNOR for bootloader
o_errCode = 0;
o_tocUsed = 0;
//Copy Table of Contents from PNOR flash to a local buffer
//The first TOC is 2 TOC sizes back from the end of the flash (+ 1)
Bootloader::handleMMIO(i_pnorEnd - PNOR::TOC_OFFSET_FROM_TOP_OF_FLASH,
reinterpret_cast<uint64_t>(l_tocBuffer),
(PNOR::TOC_SIZE),
Bootloader::WORDSIZE);
BOOTLOADER_TRACE(BTLDR_TRC_PA_FINDTOC_TOC1_HANDLEMMIO_RTN);
readTOC(l_tocBuffer, o_errCode, o_TOC, o_pnorStart, i_pnorEnd);
if(o_errCode == PNOR::NO_ERROR)
{
BOOTLOADER_TRACE(BTLDR_TRC_PA_FINDTOC_TOC1_READTOC_RTN);
o_tocUsed = 0;
break;
}
else
{
//If the first toc was invalid, look for the backup in the start
Bootloader::handleMMIO(o_pnorStart,
reinterpret_cast<uint64_t>(l_tocBuffer),
(PNOR::TOC_SIZE),
Bootloader::WORDSIZE);
o_errCode = 0;
readTOC(l_tocBuffer, o_errCode, o_TOC, o_pnorStart, i_pnorEnd);
if(o_errCode == PNOR::NO_ERROR)
{
o_tocUsed = 1;
break;
}
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_FINDTOC_READTOC_ERR);
}
break;
}while(0);
}
/**
* @brief Get the hostboot base image
*/
void bl_pnorAccess::getHBBSection(uint64_t i_pnorEnd,
PNOR::SectionData_t& o_hbbSection,
uint32_t& o_errCode,
uint8_t& o_tocUsed,
uint64_t& o_pnorStart)
{
BOOTLOADER_TRACE(BTLDR_TRC_PA_GETHBBSECTION_START);
do
{
PNOR::SectionData_t l_TOC[PNOR::NUM_SECTIONS];
findTOC(i_pnorEnd, l_TOC, o_errCode, o_tocUsed, o_pnorStart);
if(o_errCode != PNOR::NO_ERROR)
{
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_GETHBBSECTION_FINDTOC_ERR);
break;
}
o_hbbSection = l_TOC[PNOR::HB_BASE_CODE];
if(o_hbbSection.flashAddr == PNOR::INVALID_FLASH_OFFSET)
{
o_errCode = PNOR::NO_HBB_SECTION;
BOOTLOADER_TRACE_W_BRK(BTLDR_TRC_PA_GETHBBSECTION_FINDTOC_NOHBB);
break;
}
} while(0);
BOOTLOADER_TRACE(BTLDR_TRC_PA_GETHBBSECTION_FINDTOC_RTN);
}
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