hi,
Its good to read elaborate docs on this but in brief,
It is the work of intial bootloader and is
architecture dependant process,so you can see
in arch/boot where setup.S will do,
specifuaclly it is just to set a Protected mode enable
bit of CR0 register of 386 architecture specific
this is i think LSB of it you read it in docs.
but nearabout as follows
#define PE_ON 0x01
Turning on protected mode
movl cr0 , eax
orl $PE_ON, eax
movl eax, cr0
jump to relocation,
in above assembly it is just set a bit of cr0,
and then the loading of kernel code segment etc.
is done but after this we are in protected mode.
Please let me know if i explained any wrong thing.
Thanks
Prasanna
--- news <pdn@sasken.com> wrote:
>
> which c file switches the kernel from real mode to
> protected mode
>
> algorithm for converting phy addr space to logical
> space
> --
> .
>
> >
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