Data Quality or ARM System Developers Guide

Data Quality: The Accuracy Dimension

Author: Jack E Olson

Data Quality: The Accuracy Dimension is about assessing the quality of corporate data and improving its accuracy using the data profiling method. Corporate data is increasingly important as companies continue to find new ways to use it. Likewise, improving the accuracy of data in information systems is fast becoming a major goal as companies realize how much it affects their bottom line. Data profiling is a new technology that supports and enhances the accuracy of databases throughout major IT shops. Jack Olson explains data profiling and shows how it fits into the larger picture of data quality.

* Provides an accessible, enjoyable introduction to the subject of data accuracy, peppered with real-world anecdotes.

* Provides a framework for data profiling with a discussion of analytical tools appropriate for assessing data accuracy.

* Is written by one of the original developers of data profiling technology.

* Is a must-read for any data management staff, IT management staff, and CIOs of companies with data assets.

New interesting textbook: Un'introduzione all'amministrazione di vendita

ARM System Developer's Guide: Designing and Optimizing System Software

Author: Andrew Sloss

Over the last ten years, the ARM architecture has become one of the most pervasive architectures in the world, with more than 2 billion ARM-based processors embedded in products ranging from cell phones to automotive braking systems. A world-wide community of ARM developers in semiconductor and product design companies includes software developers, system designers and hardware engineers. To date no book has directly addressed their need to develop the system and software for an ARM-based system. This text fills that gap.

This book provides a comprehensive description of the operation of the ARM core from a developer's perspective with a clear emphasis on software. It demonstrates not only how to write efficient ARM software in C and assembly but also how to optimize code. Example code throughout the book can be integrated into commercial products or used as templates to enable quick creation of productive software.

The book covers both the ARM and Thumb instruction sets, covers Intel's XScale Processors, outlines distinctions among the versions of the ARM architecture, demonstrates how to implement DSP algorithms, explains exception and interrupt handling, describes the cache technologies that surround the ARM cores as well as the most efficient memory management techniques. A final chapter looks forward to the future of the ARM architecture considering ARMv6, the latest change to the instruction set, which has been designed to improve the DSP and media processing capabilities of the architecture.

* No other book describes the ARM core from a system and software perspective.
* Author team combines extensive ARM software engineering experience with an in-depthknowledge of ARM developer needs.
* Practical, executable code is fully explained in the book and available on the publisher's Website.
* Includes a simple embedded operating system.

What People Are Saying

"Colored with practical examples, and thorough treatment of topics such as ISRs, code optimization, DSP on ARM and the like, this book is essential for every embedded software engineer and hardware engineer alike."
—J. Scott Runner, Senior Staff Engineer/Manager, Qualcomm CMDA Technologies, Qualcomm Inc.

"I have been using this book since reviewing the first draft, and can recommend it to anyone who wants the get the best out of their ARM Powered products."
—Peter Maloy, CodeSprite Inc.

Table of Contents:

Table of Contents:

1. ARM Embedded Systems
1.1 The RISC Design Philosophy
1.2 The ARM Design Philosophy
1.3 Embedded System Hardware
1.4 Embedded System Software
1.5 Summary

2 ARM Processor Fundamentals
2.1 Registers
2.2 Current Program Status Register
2.3 Pipeline
2.4 Exceptions, Interrupts, and the Vector Table
2.5 Core Extensions
2.6 Architecture Revisions
2.7 ARM Processor Families
2.8 Summary

3 Introduction to the ARM Instruction Set
3.1 Data Processing Instructions
3.2 Branch Instructions
3.3 Load-Store Instructions
3.4 Software Interrupt Instruction
3.5 Program Status Register Instructions
3.6 Loading Constants
3.7 ARMv5E Extensions
3.8 Conditional Execution
3.9 Summary

4 Introduction to the Thumb Instruction Set
4.1 Thumb Register Usage
4.2 ARM-Thumb Interworking
4.3 Other Branch Instructions
4.4 Data Processing Instructions
4.5 Single-Register Load-Store Instructions
4.6 Multiple-Register Load-Store Instructions
4.7 Stack Instructions
4.8 Software Interrupt Instruction
4.9 Summary

5 Efficient C Programming
5.1 Overview of C Compilers and Optimization
5.2 Basic C Data Types
5.3 C Looping Structures
5.4 Register Allocation
5.5 Function Calls
5.6 Pointer Aliasing
5.7 Structure Arrangement
5.8 Bit-fields
5.9 Unaligned Data and Endianness
5.10 Division
5.11 Floating Point
5.12 Inline Functions and Inline Assembly
5.13 Portability Issues
5.14 Summary

6 Writing and Optimizing ARM Assembly Code
6.1 Writing Assembly Code
6.2 Profiling and Cycle Counting
6.3 Instruction Scheduling
6.4 Register Allocation
6.5 Conditional Execution
6.6 Looping Constructs
6.7 Bit Manipulation
6.8 Efficient Switches
6.9 Handling Unaligned Data
6.10 Summary

7 Optimized Primitives
7.1 Double-Precision Integer Multiplication
7.2 Integer Normalization and Count Leading Zeros
7.3 Division
7.4 Square Roots
7.5 Transcendental Functions: log, exp, sin, cos
7.6 Endian Reversal and Bit Operations
7.7 Saturated and Rounded Arithmetic
7.8 Random Number Generation
7.9 Summary
8 Digital Signal Processing
8.1 Representing a Digital Signal
8.2 Introduction to DSP on the ARM
8.3 FIR filters
8.4 IIR Filters
8.5 The Discrete Fourier Transform
8.6 Summary

9 Exception and Interruput Handling
9.1 Exception Handling
9.2 Interrupts
9.3 Interrupt Handling Schemes
9.4 Summary

10 Firmware
10.1 Firmware and Bootloader
10.2 Example: Sandstone
10.3 Summary

11 Embedded Operating Systems
11.1 Fundamental Components
11.2 Example: Simple Little Operating System
11.3 Summary

12 Caches
12.1 The Memory Hierarchy and Cache Memory
12.2 Cache Architecture
12.3 Cache Policy
12.4 Coprocessor 15 and Caches
12.5 Flushing and Cleaning Cache Memory
12.6 Cache Lockdown
12.7 Caches and Software Performance
12.8 Summary

13 Memory Protection Units
13.1 Protected Regions
13.2 Initializing the MPU, Caches, and Write Buffer
13.3 Demonstration of an MPU system
13.4 Summary

14 Memory Management Units
14.1 Moving from an MPU to an MMU
14.2 How Virtual Memory Works
14.3 Details of the ARM MMU
14.4 Page Tables
14.5 The Translation Lookaside Buffer
14.6 Domains and Memory Access Permission
14.7 The Caches and Write Buffer
14.8 Coprocessor 15 and MMU Configuration
14.9 The Fast Context Switch Extension
14.10 Demonstration: A Small Virtual Memory System
14.11 The Demonstration as mmuSLOS
14.12 Summary

15 The Future of the Architecture
by John Rayfield
15.1 Advanced DSP and SIMD Support in ARMv6
15.2 System and Multiprocessor Support Additions to ARMv6
15.3 ARMv6 Implementations
15.4 Future Technologies beyond ARMv6
15.5 Conclusions
Appendix A: ARM and Thumb Assembler Instructions

Appendix: B ARM and Thumb Instruction Encodings
Appendix C: Processors and Architecture
Appendix D: Instruction Cycle Timings
Appendix E: Suggested Reading

Index