Android Boot SequenceAndroid Boot Sequence.docxVIP

下载本文档

3
0
约7.75千字
约 5页
2017-01-05 发布于贵州
举报
版权申诉

Android Boot SequenceAndroid Boot Sequence.docx

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

Android Boot SequenceAndroid Boot Sequence

In Depth : Android Boot Sequence / ProcessWhat happened when I press power on button in my Android device ?What is Android boot sequence ?What is linux kernel ?What is different between desktop linux kernel and Android linux kernel ?What is bootloader ?What is Zygote ?What is x86 and ARM linux ?What is init.rc ?What is System Server ?Many questions pop-up in mind when we think about Android boot sequence.Here I am explaining Android boot process. I hope you will find answer of above questions.Android is linux based open source operating system, x86 (x86 is a series of computer microprocessor instruction set architectures based on the Intel 8086 CPU.) is most likely system where linux kernel is deployed however all Android devices are running on ARM process (ARM (formerly Advanced RISC Machine, which was formerly Acorn RISC Machine)) except Intel’s Xolo device (http://xolo.in/xolo-x900-features). Xolo comes with Atom 1.6 GHz x86 processor. Android boot sequence or I can say embedded device or ARM based linux has minor difference compare to desktop version. ?In this article I am going to explain boot sequence for Android only. Inside the linux boot process is good article for desktop based linux boot sequence.Android device execute following steps when you press power switchAndroid Boot Sequence / ProcessStep 1 : Power On and System StartupWhen power start Boot ROM code start execution from pre defined location which is hardwired on ROM. It load Bootloader into RAM and start executionStep 2 : BootloaderBootloader is small program which runs before Android operating system running. Bootloader is first program to run so It is specific for board and processor. Device manufacturer either use popular bootloaders like redboot,uboot, qi bootloader or they develop own bootloaders, It’s not part of Android Operating System. bootloader is the place where OEMs and Carriers put there locks and restrictions. Bootloader perform execution in two stages, first stage It to detect exte