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#
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#
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# Copyright (C) 2001-2004 Jakub Jermar
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# Copyright (C) 2001-2004 Jakub Jermar
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# Copyright (C) 2005-2006 Martin Decky
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# All rights reserved.
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# All rights reserved.
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#
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#
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# Redistribution and use in source and binary forms, with or without
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# modification, are permitted provided that the following conditions
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# are met:
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# are met:
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#
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#
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# Init code for application processors.
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# Init code for application processors.
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#
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#
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#include <arch/boot/boot.h>
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#include <arch/boot/memmap.h>
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#include <arch/mm/page.h>
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#include <arch/pm.h>
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.section K_TEXT_START_2, "ax"
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.section K_TEXT_START, "ax"
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#ifdef CONFIG_SMP
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#ifdef CONFIG_SMP
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.global ap_boot
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.global unmapped_ap_boot
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KTEXT=8
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KTEXT=8
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KDATA=16
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KDATA=16
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# This piece of code is real-mode and is meant to be alligned at 4K boundary.
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# This piece of code is real-mode and is meant to be alligned at 4K boundary.
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# The requirement for such an alignment comes from MP Specification's STARTUP IPI
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# The requirement for such an alignment comes from MP Specification's STARTUP IPI
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# requirements.
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# requirements.
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.align 4096
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.align 4096
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ap_boot:
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unmapped_ap_boot:
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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 real_bootstrap_gdtr_boot	# initialize Global Descriptor Table register
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	lgdt ap_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 - BOOT_OFFSET + AP_BOOT_OFFSET
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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
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	movw %ax, %ds
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	movw %ax, %ds
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	movw %ax, %es
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	movw %ax, %es
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	movw %ax, %ss
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	movw %ax, %ss
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	movl $(ctx-0x80000000), %eax	# KA2PA((__address) &ctx)
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	movl $KA2PA(ctx), %eax			# KA2PA((__address) &ctx)
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	movl (%eax), %esp
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	movl (%eax), %esp
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	subl $0x80000000, %esp			# KA2PA(ctx.sp)
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	subl $0x80000000, %esp			# KA2PA(ctx.sp)
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	call map_kernel					# map kernel and turn paging on
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	call map_kernel					# map kernel and turn paging on
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	addl $0x80000000, %esp			# PA2KA(ctx.sp)
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	addl $0x80000000, %esp			# PA2KA(ctx.sp)
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	jmpl $KTEXT, $main_ap
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	jmpl $KTEXT, $main_ap
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#endif /* CONFIG_SMP */
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#endif /* CONFIG_SMP */
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.section K_DATA_START, "ax"
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#ifdef CONFIG_SMP
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.global unmapped_ap_gdtr
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unmapped_ap_gdtr:
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	.word 0
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	.long 0
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#endif /* CONFIG_SMP */