From dd57c62797d2b8d05e224680c7bc6e3d4640dde0 Mon Sep 17 00:00:00 2001
From: Juergen Beisert <jbe@pengutronix.de>
Date: Mon, 6 Jun 2011 16:57:16 +0200
Subject: Import FSL's release 10.11.01

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
---
 common/DataTarget.h | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 common/DataTarget.h

(limited to 'common/DataTarget.h')

diff --git a/common/DataTarget.h b/common/DataTarget.h
new file mode 100644
index 0000000..e154491
--- /dev/null
+++ b/common/DataTarget.h
@@ -0,0 +1,122 @@
+/*
+ * File:	DataTarget.h
+ *
+ * Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
+ * See included license file for license details.
+ */
+#if !defined(_DataTarget_h_)
+#define _DataTarget_h_
+
+#include "stdafx.h"
+#include "DataSource.h"
+
+namespace elftosb
+{
+
+// Forward declaration
+class DataSource;
+
+/*!
+ * \brief Abstract base class for the target address or range of data.
+ *
+ * Targets at the most basic level have a single address, and potentially
+ * an address range. Unbounded targets have a beginning address but no
+ * specific end address, while bounded targets do have an end address.
+ *
+ * Users of a data target can access the begin and end addresses directly.
+ * However, the most powerful way to use a target is with the
+ * getRangeForSegment() method. This method returns the target address range
+ * for a segment of a data source. The value of the resulting range can be
+ * completely dependent upon the segment's properties, those of its data
+ * source, and the type of data target.
+ *
+ * \see elftosb::DataSource
+ */
+class DataTarget
+{
+public:
+	//! \brief Simple structure that describes an addressed region of memory.
+	//! \todo Decide if the end address is inclusive or not.
+	struct AddressRange
+	{
+		uint32_t m_begin;
+		uint32_t m_end;
+	};
+	
+public:
+	//! \brief Default constructor.
+	DataTarget() : m_source(0) {}
+	
+	//! \brief Destructor.
+	virtual ~DataTarget() {}
+	
+	//! \brief Whether the target is just a single address or has an end to it.
+	virtual bool isBounded() { return false; }
+	
+	virtual uint32_t getBeginAddress() { return 0; }
+	virtual uint32_t getEndAddress() { return 0; }
+	
+	//! \brief Return the address range for a segment of a data source.
+	virtual DataTarget::AddressRange getRangeForSegment(DataSource & source, DataSource::Segment & segment)=0;
+	
+	inline void setSource(DataSource * source) { m_source = source; }
+	inline DataSource * getSource() const { return m_source; }
+	
+protected:
+	DataSource * m_source;	//!< Corresponding data source for this target.
+};
+
+/*!
+ * \brief Target with a constant values for the addresses.
+ *
+ * This target type supports can be both bounded and unbounded. It always has
+ * at least one address, the beginning address. The end address is optional,
+ * and if not provided makes the target unbounded.
+ */
+class ConstantDataTarget : public DataTarget
+{
+public:
+	//! \brief Constructor taking only a begin address.
+	ConstantDataTarget(uint32_t start) : DataTarget(), m_begin(start), m_end(0), m_hasEnd(false) {}
+	
+	//! \brief Constructor taking both begin and end addresses.
+	ConstantDataTarget(uint32_t start, uint32_t end) : DataTarget(), m_begin(start), m_end(end), m_hasEnd(true) {}
+	
+	//! \brief The target is bounded if an end address was specified.
+	virtual bool isBounded() { return m_hasEnd; }
+	
+	virtual uint32_t getBeginAddress() { return m_begin; }
+	virtual uint32_t getEndAddress() { return m_end; }
+	
+	//! \brief Return the address range for a segment of a data source.
+	virtual DataTarget::AddressRange getRangeForSegment(DataSource & source, DataSource::Segment & segment);
+	
+protected:
+	uint32_t m_begin;	//!< Start address.
+	uint32_t m_end;		//!< End address.
+	bool m_hasEnd;		//!< Was an end address specified?
+};
+
+/*!
+ * \brief Target address that is the "natural" location of whatever the source data is.
+ *
+ * The data source used with the target must have a natural location. If
+ * getRangeForSegment() is called with a segment that does not have a natural
+ * location, a semantic_error will be thrown.
+ */
+class NaturalDataTarget : public DataTarget
+{
+public:
+	//! \brief Default constructor.
+	NaturalDataTarget() : DataTarget() {}
+	
+	//! \brief Natural data targets are bounded by their source's segment lengths.
+	virtual bool isBounded() { return true; }
+	
+	//! \brief Return the address range for a segment of a data source.
+	virtual DataTarget::AddressRange getRangeForSegment(DataSource & source, DataSource::Segment & segment);
+};
+
+}; // namespace elftosb
+
+#endif // _DataTarget_h_
-- 
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