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Clarified PALO header versions in boot sector description

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Thomas Schmitt 2014-04-09 23:59:09 +02:00
parent af843e446f
commit 1ac59bec46
1 changed files with 9 additions and 1 deletions
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10
doc/boot_sectors.txt
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@ -982,6 +982,10 @@ Sources:
by Steve McIntyre <steve@einval.com> by Steve McIntyre <steve@einval.com>
who states "Heavily inspired by palo" who states "Heavily inspired by palo"
This format is expected by PALO versions before 1.92. Their source code defines
PALOHDRVERSION as 4. The format also serves as fallback for newer versions,
which expect header version 5, if a 0-byte is found at byte position 1024.
There are five parameters which get encoded into the first 248 bytes of the There are five parameters which get encoded into the first 248 bytes of the
System Area: cmdline, bootloader, 32-bit kernel, 64-bit kernel, and ramdisk. System Area: cmdline, bootloader, 32-bit kernel, 64-bit kernel, and ramdisk.
They are all mandatory. They are all mandatory.
@ -1033,7 +1037,11 @@ Sources:
http://git.kernel.org/cgit/linux/kernel/git/deller/palo.git/tree/lib/ http://git.kernel.org/cgit/linux/kernel/git/deller/palo.git/tree/lib/
(especially struct firstblock in common.h and struct partition in part.h) (especially struct firstblock in common.h and struct partition in part.h)
There are five parameters which get encoded into the first 248 bytes of the This format is expected by PALO versions 1.92 or higher. They fall back to
header version 4 if a 0-byte is found at byte position 1024.
Their source code defines PALOHDRVERSION as 5.
There are five parameters which get encoded into the first 2048 bytes of the
System Area: cmdline, bootloader, 32-bit kernel, 64-bit kernel, and ramdisk. System Area: cmdline, bootloader, 32-bit kernel, 64-bit kernel, and ramdisk.
They are all mandatory. They are all mandatory.
While cmdline is simply a string of at most 1023 characters, the other four While cmdline is simply a string of at most 1023 characters, the other four