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Rev 4344 Rev 4345
Line 173... Line 173...
173 
	jmpl $gdtselector(KTEXT_DES), $start64
 173 
	jmpl $gdtselector(KTEXT_DES), $start64
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 174 
 
175 
.code64
 175 
.code64
176 
start64:
 176 
start64:
177 
	movq $(PA2KA(START_STACK)), %rsp
 177 
	movq $(PA2KA(START_STACK)), %rsp
178 
	movl grub_eax, %eax
 - 
 
179 
	movl grub_ebx, %ebx
 - 
 
180
178 
 
181 
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax			# compare GRUB signature
 - 
 
182 
	je valid_boot
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183
- 
 
184 
		xorl %ecx, %ecx					# no memory size or map available
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185 
		movl %ecx, e820counter
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186
- 
 
187 
		jmp invalid_boot
 - 
 
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- 
 
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	valid_boot:
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190
- 
 
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		movl (%ebx), %eax				# ebx = physical address of struct multiboot_info
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- 
 
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		bt $3, %eax					# mbi->flags[3] (mods_count, mods_addr valid)
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		jc mods_valid
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195
- 
 
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			xorq %rcx, %rcx
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			movq %rcx, init
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			jmp mods_end
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- 
 
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		mods_valid:
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		xorq %rcx, %rcx
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		movl 20(%ebx), %ecx				# mbi->mods_count
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		movq %rcx, init
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		cmpl $0, %ecx
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		je mods_end
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- 
 
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		movl 24(%ebx), %esi				# mbi->mods_addr
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	# arch_pre_main(grub_eax, grub_ebx)
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		movq $init, %rdi
 - 
 
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- 
 
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		mods_loop:
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- 
 
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			xorq %rdx, %rdx
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	xorq %rdi, %rdi
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			movl 0(%esi), %edx			# mods->mod_start
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			movq $0xffff800000000000, %r10
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			addq %r10, %rdx
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			movq %rdx, 8(%rdi)
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	movl grub_eax, %edi
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- 
 
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			xorq %rdx, %rdx
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	xorq %rsi, %rsi
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			movl 4(%esi), %edx
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	movl grub_ebx, %esi
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			subl 0(%esi), %edx			# mods->mod_end - mods->mod_start
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			movq %rdx, 16(%rdi)
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			addl $16, %esi
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			addq $48, %rdi
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			loop mods_loop
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- 
 
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		mods_end:
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		bt $6, %eax					# mbi->flags[6] (mmap_length, mmap_addr valid)
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		jc mmap_valid
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			xorl %edx, %edx
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			jmp mmap_invalid
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- 
 
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		mmap_valid:
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		movl 44(%ebx), %ecx				# mbi->mmap_length
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		movl 48(%ebx), %esi				# mbi->mmap_addr
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		movq $e820table, %rdi
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		xorl %edx, %edx
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		mmap_loop:
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			cmpl $0, %ecx
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			jle mmap_end
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- 
 
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			movl 4(%esi), %eax			# mmap->base_addr_low
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			movl %eax, (%rdi)
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			movl 8(%esi), %eax			# mmap->base_addr_high
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			movl %eax, 4(%rdi)
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			movl 12(%esi), %eax			# mmap->length_low
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			movl %eax, 8(%rdi)
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			movl 16(%esi), %eax			# mmap->length_high
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			movl %eax, 12(%rdi)
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			movl 20(%esi), %eax			# mmap->type
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			movl %eax, 16(%rdi)
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- 
 
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			movl (%esi), %eax			# mmap->size
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			addl $0x4, %eax
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			addl %eax, %esi
 184 
	call arch_pre_main
266 
			subl %eax, %ecx
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			addq $MEMMAP_E820_RECORD_SIZE, %rdi
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			incl %edx
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269 
			jmp mmap_loop
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- 
 
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		mmap_end:
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- 
 
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		mmap_invalid:
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		movl %edx, e820counter
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- 
 
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	invalid_boot:
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185 
 
278 
#ifdef CONFIG_SMP
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	call main_bsp
279
187 
 
280 
	# copy AP bootstrap routines below 1 MB
 - 
 
281
- 
 
282 
	movq $BOOT_OFFSET, %rsi
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283 
	movq $AP_BOOT_OFFSET, %rdi
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284 
	movq $_hardcoded_unmapped_size, %rcx
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285 
	rep movsb
 188 
	# Not reached.
286
- 
 
287 
#endif
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288
- 
 
289 
	call main_bsp   # never returns
 - 
 
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291 
	cli
 190 
	cli
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	hlt
 191 
	hlt
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#ifdef CONFIG_FB
 193 
#ifdef CONFIG_FB