questions regarding arch/i386/boot/setup.S

S-n-e-a-k-e-r@gmx.net
Mon, 5 May 2003 13:44:46 +0200 (MEST)


I write this to the kernel mailing list, because my question couldn't be
answered on irc (eg. irc.kernelnewbie.org):
____________________________________________________________________________
arch/i386/boot/setup.S:

164 trampoline: call start_of_setup
165 .space 1024
166 # End of setup header
#####################################################
167
168 start_of_setup:
169 # Bootlin depends on this being done early
170 movw $0x01500, %ax
____________________________________________________________________________
my questions are:

-) Why is there a call on line 164 and not a jmp?
-) Why does line 165 reserve 1024 bytes? what is it for?
-) On line 170: Why $0x01500 and not $0x1500?

I would appreciate if someone could answer this mail, or if someone can
provide ressources where I can find detailed description of the kernel code
(didn't find anything, just overall information)

regards,

andy

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