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/*
* File: DataSource.h
*
* Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
*
* Freescale Semiconductor, Inc.
* Proprietary & Confidential
*
* This source code and the algorithms implemented therein constitute
* confidential information and may comprise trade secrets of Freescale Semiconductor, Inc.
* or its associates, and any use thereof is subject to the terms and
* conditions of the Confidential Disclosure Agreement pursual to which this
* source code was originally received.
*/
#include "IVTDataSource.h"
#include "DataTarget.h"
#include "EndianUtilities.h"
#include <algorithm>
#include <stdlib.h>
#include <string.h>
using namespace elftosb;
IVTDataSource::IVTDataSource()
: DataSource(),
DataSource::Segment((DataSource&)*this),
m_isSelfSet(false)
{
// Init the IVT structure.
memset(&m_ivt, 0, sizeof(m_ivt));
hab_hdr_t hdr = IVT_HDR(sizeof(m_ivt), HAB_VERSION);
m_ivt.hdr = hdr;
}
unsigned IVTDataSource::getData(unsigned offset, unsigned maxBytes, uint8_t * buffer)
{
// Bail if the offset is out of range.
if (offset >= sizeof(m_ivt))
{
return 0;
}
// If we have an associated target, and the IVT self pointer is not set, then
// fill in the self pointer from the target address.
if (m_target && !m_isSelfSet)
{
m_ivt.self = ENDIAN_HOST_TO_LITTLE_U32(m_target->getBeginAddress());
}
// Truncate max bytes at the end of the IVT.
maxBytes = std::min<unsigned>(maxBytes, sizeof(m_ivt) - offset);
// Copy into output buffer.
if (maxBytes)
{
memcpy(buffer, (uint8_t *)&m_ivt + offset, maxBytes);
}
return maxBytes;
}
unsigned IVTDataSource::getLength()
{
return sizeof(m_ivt);
}
//! The IVT has a natural location if its self pointer was explicitly specified.
//!
bool IVTDataSource::hasNaturalLocation()
{
return m_isSelfSet;
}
//!
uint32_t IVTDataSource::getBaseAddress()
{
return m_ivt.self;
}
bool IVTDataSource::setFieldByName(const std::string & name, uint32_t value)
{
if (name == "entry")
{
m_ivt.entry = ENDIAN_HOST_TO_LITTLE_U32(value);
}
else if (name == "dcd")
{
m_ivt.dcd = ENDIAN_HOST_TO_LITTLE_U32(value);
}
else if (name == "boot_data")
{
m_ivt.boot_data = ENDIAN_HOST_TO_LITTLE_U32(value);
}
else if (name == "self")
{
m_ivt.self = ENDIAN_HOST_TO_LITTLE_U32(value);
m_isSelfSet = true;
}
else if (name == "csf")
{
m_ivt.csf = ENDIAN_HOST_TO_LITTLE_U32(value);
}
else
{
// Unrecognized field name.
return false;
}
return true;
}
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