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>Linux i386 Boot Code HOWTO</TITLE
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><H1
CLASS="title"
><A
NAME="AEN2"
></A
>Linux i386 Boot Code HOWTO</H1
><H3
CLASS="author"
><A
NAME="AEN4"
>Feiyun Wang</A
></H3
><DIV
CLASS="affiliation"
><DIV
CLASS="address"
><P
CLASS="address"
><TT
CLASS="email"
><<A
HREF="mailto:feiyunw@yahoo.com"
>feiyunw@yahoo.com</A
>></TT
></P
></DIV
></DIV
><P
CLASS="pubdate"
>2004-01-23<BR></P
><DIV
CLASS="revhistory"
><TABLE
WIDTH="100%"
BORDER="0"
><TR
><TH
ALIGN="LEFT"
VALIGN="TOP"
COLSPAN="3"
><B
>Revision History</B
></TH
></TR
><TR
><TD
ALIGN="LEFT"
>Revision 1.0</TD
><TD
ALIGN="LEFT"
>2004-02-19</TD
><TD
ALIGN="LEFT"
>Revised by: FW</TD
></TR
><TR
><TD
ALIGN="LEFT"
COLSPAN="3"
>Initial release, reviewed by LDP</TD
></TR
><TR
><TD
ALIGN="LEFT"
>Revision 0.3.3</TD
><TD
ALIGN="LEFT"
>2004-01-23</TD
><TD
ALIGN="LEFT"
>Revised by: fyw</TD
></TR
><TR
><TD
ALIGN="LEFT"
COLSPAN="3"
>Add decompress_kernel() details;
Fix bugs reported in TLDP final review.</TD
></TR
><TR
><TD
ALIGN="LEFT"
>Revision 0.3</TD
><TD
ALIGN="LEFT"
>2003-12-07</TD
><TD
ALIGN="LEFT"
>Revised by: fyw</TD
></TR
><TR
><TD
ALIGN="LEFT"
COLSPAN="3"
>Add contents on SMP, GRUB and LILO; Fix and enhance.</TD
></TR
><TR
><TD
ALIGN="LEFT"
>Revision 0.2</TD
><TD
ALIGN="LEFT"
>2003-08-17</TD
><TD
ALIGN="LEFT"
>Revised by: fyw</TD
></TR
><TR
><TD
ALIGN="LEFT"
COLSPAN="3"
>Adapt to Linux 2.4.20.</TD
></TR
><TR
><TD
ALIGN="LEFT"
>Revision 0.1</TD
><TD
ALIGN="LEFT"
>2003-04-20</TD
><TD
ALIGN="LEFT"
>Revised by: fyw</TD
></TR
><TR
><TD
ALIGN="LEFT"
COLSPAN="3"
>Change to DocBook XML format.</TD
></TR
></TABLE
></DIV
><DIV
><DIV
CLASS="abstract"
><A
NAME="AEN37"
></A
><P
></P
><P
> This document describes Linux i386 boot code,
serving as a study guide and source commentary.
In addition to C-like pseudocode source commentary, it also presents
keynotes of toolchains and specs related to kernel development.
It is designed to help:
<P
></P
><UL
><LI
><P
>kernel newbies to understand Linux i386 boot code, and</P
></LI
><LI
><P
>kernel veterans to recall Linux boot procedure.</P
></LI
></UL
>
</P
><P
></P
></DIV
></DIV
><HR></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>1. <A
HREF="intro.html"
>Introduction</A
></DT
><DD
><DL
><DT
>1.1. <A
HREF="intro.html#copyright"
>Copyright and License</A
></DT
><DT
>1.2. <A
HREF="intro.html#disclaimer"
>Disclaimer</A
></DT
><DT
>1.3. <A
HREF="intro.html#credits"
>Credits / Contributors</A
></DT
><DT
>1.4. <A
HREF="intro.html#feedback"
>Feedback</A
></DT
><DT
>1.5. <A
HREF="intro.html#translations"
>Translations</A
></DT
></DL
></DD
><DT
>2. <A
HREF="makefiles.html"
>Linux Makefiles</A
></DT
><DD
><DL
><DT
>2.1. <A
HREF="makefiles.html#linux_makefile"
>linux/Makefile</A
></DT
><DT
>2.2. <A
HREF="makefiles.html#vmlinux.lds"
>linux/arch/i386/vmlinux.lds</A
></DT
><DT
>2.3. <A
HREF="makefiles.html#i386_makefile"
>linux/arch/i386/Makefile</A
></DT
><DT
>2.4. <A
HREF="makefiles.html#i386_boot_makefile"
>linux/arch/i386/boot/Makefile</A
></DT
><DT
>2.5. <A
HREF="makefiles.html#i386_boot_compressed_makefile"
>linux/arch/i386/boot/compressed/Makefile</A
></DT
><DT
>2.6. <A
HREF="makefiles.html#i386_tools_build.c"
>linux/arch/i386/tools/build.c</A
></DT
><DT
>2.7. <A
HREF="makefiles.html#makefile_ref"
>Reference</A
></DT
></DL
></DD
><DT
>3. <A
HREF="bootsect.html"
>linux/arch/i386/boot/bootsect.S</A
></DT
><DD
><DL
><DT
>3.1. <A
HREF="bootsect.html#move_bootsect"
>Move Bootsect</A
></DT
><DT
>3.2. <A
HREF="bootsect.html#get_disk_para"
>Get Disk Parameters</A
></DT
><DT
>3.3. <A
HREF="bootsect.html#load_setup"
>Load Setup Code</A
></DT
><DT
>3.4. <A
HREF="bootsect.html#load_compressed"
>Load Compressed Image</A
></DT
><DT
>3.5. <A
HREF="bootsect.html#go_setup"
>Go Setup</A
></DT
><DT
>3.6. <A
HREF="bootsect.html#read_disk"
>Read Disk</A
></DT
><DT
>3.7. <A
HREF="bootsect.html#bootsect_helper"
>Bootsect Helper</A
></DT
><DT
>3.8. <A
HREF="bootsect.html#bootsect_misc"
>Miscellaneous</A
></DT
><DT
>3.9. <A
HREF="bootsect.html#bootsect_ref"
>Reference</A
></DT
></DL
></DD
><DT
>4. <A
HREF="setup.html"
>linux/arch/i386/boot/setup.S</A
></DT
><DD
><DL
><DT
>4.1. <A
HREF="setup.html#setup_header"
>Header</A
></DT
><DT
>4.2. <A
HREF="setup.html#check_code"
>Check Code Integrity</A
></DT
><DT
>4.3. <A
HREF="setup.html#check_loader"
>Check Loader Type</A
></DT
><DT
>4.4. <A
HREF="setup.html#get_mem_size"
>Get Memory Size</A
></DT
><DT
>4.5. <A
HREF="setup.html#hw_support"
>Hardware Support</A
></DT
><DT
>4.6. <A
HREF="setup.html#apm_support"
>APM Support</A
></DT
><DT
>4.7. <A
HREF="setup.html#prepare_protmode"
>Prepare for Protected Mode</A
></DT
><DT
>4.8. <A
HREF="setup.html#enable_a20"
>Enable A20</A
></DT
><DT
>4.9. <A
HREF="setup.html#switch_protmode"
>Switch to Protected Mode</A
></DT
><DT
>4.10. <A
HREF="setup.html#setup_misc"
>Miscellaneous</A
></DT
><DT
>4.11. <A
HREF="setup.html#setup_ref"
>Reference</A
></DT
></DL
></DD
><DT
>5. <A
HREF="compressed_head.html"
>linux/arch/i386/boot/compressed/head.S</A
></DT
><DD
><DL
><DT
>5.1. <A
HREF="compressed_head.html#decompress_kernel"
>Decompress Kernel</A
></DT
><DT
>5.2. <A
HREF="compressed_head.html#gunzip"
>gunzip()</A
></DT
><DT
>5.3. <A
HREF="compressed_head.html#inflate"
>inflate()</A
></DT
><DT
>5.4. <A
HREF="compressed_head.html#chead_ref"
>Reference</A
></DT
></DL
></DD
><DT
>6. <A
HREF="kernel_head.html"
>linux/arch/i386/kernel/head.S</A
></DT
><DD
><DL
><DT
>6.1. <A
HREF="kernel_head.html#enable_paging"
>Enable Paging</A
></DT
><DT
>6.2. <A
HREF="kernel_head.html#get_kernel_para"
>Get Kernel Parameters</A
></DT
><DT
>6.3. <A
HREF="kernel_head.html#check_cpu_type"
>Check CPU Type</A
></DT
><DT
>6.4. <A
HREF="kernel_head.html#go_start_kernel"
>Go Start Kernel</A
></DT
><DT
>6.5. <A
HREF="kernel_head.html#khead_misc"
>Miscellaneous</A
></DT
><DT
>6.6. <A
HREF="kernel_head.html#khead_ref"
>Reference</A
></DT
></DL
></DD
><DT
>7. <A
HREF="init_main.html"
>linux/init/main.c</A
></DT
><DD
><DL
><DT
>7.1. <A
HREF="init_main.html#start_kernel"
>start_kernel()</A
></DT
><DT
>7.2. <A
HREF="init_main.html#init_proc"
>init()</A
></DT
><DT
>7.3. <A
HREF="init_main.html#idle_proc"
>cpu_idle()</A
></DT
><DT
>7.4. <A
HREF="init_main.html#main_ref"
>Reference</A
></DT
></DL
></DD
><DT
>8. <A
HREF="smpboot.html"
>SMP Boot</A
></DT
><DD
><DL
><DT
>8.1. <A
HREF="smpboot.html#before_smpinit"
>Before smp_init()</A
></DT
><DT
>8.2. <A
HREF="smpboot.html#smp_init"
>smp_init()</A
></DT
><DT
>8.3. <A
HREF="smpboot.html#trampoline"
>linux/arch/i386/kernel/trampoline.S</A
></DT
><DT
>8.4. <A
HREF="smpboot.html#initialize_secondary"
>initialize_secondary()</A
></DT
><DT
>8.5. <A
HREF="smpboot.html#start_secondary"
>start_secondary()</A
></DT
><DT
>8.6. <A
HREF="smpboot.html#smpboot_ref"
>Reference</A
></DT
></DL
></DD
><DT
>A. <A
HREF="kbuild.html"
>Kernel Build Example</A
></DT
><DT
>B. <A
HREF="internel_lds.html"
>Internal Linker Script</A
></DT
><DT
>C. <A
HREF="bootloader.html"
>GRUB and LILO</A
></DT
><DD
><DL
><DT
>C.1. <A
HREF="bootloader.html#grub"
>GNU GRUB</A
></DT
><DT
>C.2. <A
HREF="bootloader.html#lilo"
>LILO</A
></DT
><DT
>C.3. <A
HREF="bootloader.html#bootloader_ref"
>Reference</A
></DT
></DL
></DD
><DT
>D. <A
HREF="faq.html"
>FAQ</A
></DT
></DL
></DIV
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