Setting of PE bit reboots the system

[Swapnil Pimpale]

Hi all,

I am working on GRUB 2 on Intel Core 2 Duo architecture. As a part of
my academic project, I need to bring up the second core.
When the second core comes up, I need to switch from real mode to
protected mode.
For this, I am trying to set the PE bit of cr0 register. But, whenever
I set the PE bit the system reboots.

Is there any solution on this problem?

Thanks,
Swapnil Pimpale.