文档介绍：[电子工程学]
嵌入式系统bootloader移植及系统调试
摘要
随着移动设备的流行和发展,嵌入式系统已经成为一个热点。最近的一种趋势是一个功能强大的嵌入式系统通常需要一种操作系统来给予支持,这种操作系统是已经成熟并且稳定的,可以是嵌入式的Linux,WINCE等等。而Bootloader则是嵌入式系统中的一部分。它是嵌入式系统中执行在内核操作系统前的一段代码,它的基本作用就是加载内核镜像;同时在完成基本功能的基础上,它还可以支持硬件模块以完成某些特定功能。
Boot Loader 就是在操作系统内核运行之前运行的一段小程序。通过这段小程序,我们可以初始化硬件设备、建立内存空间的映射图,从而将系统的软硬件环境带到一个合适的状态,以便为最终调用操作系统内核准备好正确的环境。
相应地,嵌入式系统的发展也大大促进了嵌入式处理器的普及。其中,ARM技术已经在当今的嵌入式微处理器领域中占据了它的领先地位。众多的半导体厂商都生产基于ARM体系结构的通用微处理芯片,究其原因,它的精简指令构架为主又不放弃与复杂指令平衡的设计,使得在获得高性能的同时又能做到低功耗。
关键词:嵌入式系统 ARM Bootloader
Abstract
With the prevalence and development of portable facilities, embedded system has been a focus of attention. Recent trends have seen a push towards the need for developing embedded systems, able to run with the underlying help of an operating system, which should be advanced and reliable, such as embedded Linux, WINDOWS CE, etc. Bootloader is a part of an embedded system. It is a section of codes executing before kernel image and is responsible for reloading the kernel image. It also can support specific hardware modules to implement specific functions.
Boot Loader is a small operating system kernel operating procedures before the operation. Through this small, but we can initialization hardware equipment, memory space maps. so that the system hardware and software environment to a suitable state, OS kernel ready for the final call to the correct environment.
Accordingly the development of the embedded systems leads to the popularity of microprocessors. The ARM architecture has established itself as one of the leading microprocessors in today’s embedded and portable market. Nowadays most of the semiconductor foundries produce the microprocessors based on ARM architecture. Its simple design founded in RISC principles yet balanced by CISC influence leads to low cost/power cores which offer high performance.
Key words: embedded systems ARM bootloader
目录
摘要 I
Abstract II
绪论 1
1 ARM微处理器概述 5
ARM-Advanced RISC Machines 5
ARM微处理器的应用领域及特点 5