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cinap_lenrek 2011-04-18 06:00:30 +00:00
commit e1f905846a
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59
sys/man/8/9boot
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@ -6,7 +6,7 @@ started by BIOS or chainloaded by partition bootsector
.SH DESCRIPTION .SH DESCRIPTION
The bootloader is responsible for reading the The bootloader is responsible for reading the
.IR plan9.ini (8) .IR plan9.ini (8)
boot parameters and boot a kernel. It interprets the boot parameters and booting a kernel. It interprets the
.B bootfile= .B bootfile=
parameter as a file path on the current boot media parameter as a file path on the current boot media
to locate the kernel image. The path should be in all to locate the kernel image. The path should be in all
@ -15,19 +15,19 @@ lower case except for
wich supports case sensitive file names. Read parameters wich supports case sensitive file names. Read parameters
are echoed on the console. The boot procedure are echoed on the console. The boot procedure
can be interrupted by pressing any key after the configuration can be interrupted by pressing any key after the configuration
was read. Then a interactive boot console is shown with a was read. The interactive boot console is indicated with a
.B > .B >
prompt. The syntax of the boot console is the same as in prompt. The syntax of the boot console is the same as in
the the
.IR plan9.ini (8) .IR plan9.ini (8)
file. The word file. The word
.B clear .B clear
will reset all current parameters and will reset all current parameters. The word
.B boot .B boot
will end the console and start booting the kernel. The boot will end the console and resume booting the kernel. The boot
console is entered automatically when boot failed, no console is entered automatically when: boot failed, no
.B bootfile= .B bootfile=
parameter is specified or no parameter was specified or no
.IR plan9.ini (8) .IR plan9.ini (8)
was found. was found.
.SH FAT BOOTING .SH FAT BOOTING
@ -36,42 +36,39 @@ The
program is responsible for loading the kernel from program is responsible for loading the kernel from
the the
.IR 9fat .IR 9fat
partition into memory and pass it the partition into memory and passing it the
.IR plan9.ini (8) .IR plan9.ini (8)
boot parameters. It gets chainloaded by boot parameters. It is chainloaded by
.IR pbs .IR pbs,
wich locates it in the root of the active wich locates it in the root of the active
FAT partition as FAT partition. The
.B 9BOOTFAT
file.
Then
.B plan9.ini .B plan9.ini
is read from the root directory of the FAT file is read from the root directory of the FAT
filesystem. filesystem.
.SH CDROM BOOTING .SH CD-ROM BOOTING
Booting from cdrom requires Booting from CD-ROM requires
.IR 9bootiso .IR 9bootiso
to be included in the iso image under to be included in the ISO-9660 image under
.B 386/9bootiso .B 386/9bootiso,
and also set as a non emulation bootblock. See
set as a non emulation bootblock see .IR mk9660 (8).
.IR mk9660 (8) .
The BIOS loads the first 2K of The BIOS loads the first 2K of
.B 386/9bootiso .B 386/9bootiso
into memory and passes execution to it. The program into memory and then executes the program. The remainder
then reads the rest of its code from the file to chainload itself. of the file is then read to complete the chainloading process.
Boot parameters are read from Boot parameters are read from
.B cfg/plan9.ini .B cfg/plan9.ini.
file.
.SH NETWORK BOOTING .SH NETWORK BOOTING
With a PXE capable BIOS and network card, it is possible for With a PXE capable BIOS and network card it is possible for
a machine to download a machine to download
.IR 9bootpxe .IR 9bootpxe
from a tftp server and load the kernel from there. The and a kernel from a tftp server. The location of
.IR 9bootpxe
is defined by the
.B bootf=/386/9bootpxe .B bootf=/386/9bootpxe
in the machines line in the tftp server's
.IR ndb (6) .IR ndb (6)
entry will tell the PXE BIOS to use it. entry.
.BR .BR
Once started, Once started,
.IR 9bootpxe .IR 9bootpxe
@ -79,8 +76,8 @@ will read the file
.B /cfg/pxe/$ether .B /cfg/pxe/$ether
from the tftp server, where from the tftp server, where
.B $ether .B $ether
is the mac address of the used network card is the MAC address of the client's network card
in lower case hex, and use it as in lower case hex, and use this as its
.IR plan9.ini (8) .IR plan9.ini (8)
file. file.
.SH SOURCE .SH SOURCE