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Rev 267 Rev 279
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.code16
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.code16
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	cli
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	cli
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	xorw %ax, %ax
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	xorw %ax, %ax
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	movw %ax, %ds
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	movw %ax, %ds
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	lgdt ap_bootstrap_gdtr	# initialize Global Descriptor Table register
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	lgdt real_bootstrap_gdtr	# initialize Global Descriptor Table register
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	movl %cr0, %eax
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	movl %cr0, %eax
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	orl $1, %eax
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	orl $1, %eax
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	movl %eax, %cr0			# switch to protected mode
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	movl %eax, %cr0				# switch to protected mode
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	jmpl $KTEXT, $jump_to_kernel
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	jmpl $KTEXT, $jump_to_kernel
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jump_to_kernel:
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jump_to_kernel:
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.code32
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.code32
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	movw $KDATA, %ax
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	movw $KDATA, %ax