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Rev 149 Rev 243
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E820_RECORD_SIZE = MEMMAP_E820_RECORD_SIZE
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E820_RECORD_SIZE = MEMMAP_E820_RECORD_SIZE
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E820_MAX_RECORDS = MEMMAP_E820_MAX_RECORDS
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E820_MAX_RECORDS = MEMMAP_E820_MAX_RECORDS
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E820_SMAP = 0x534d4150
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E820_SMAP = 0x534d4150
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.global memmap_arch_init
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.global memmap_arch_init
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.global e820counter
 - 
 
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.global e820table
 - 
 
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.global e801memorysize
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.global e801memorysize
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.code16
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.code16
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.section K_TEXT_START_2
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.section K_TEXT_START_2
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e820begin:
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e820begin:
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	xorl	%ebx,%ebx	# during first call, ebx must be 0
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	xorl	%ebx,%ebx	# during first call, ebx must be 0
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	movw	%bx,%ds
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	movw	%bx,%ds
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	movw	%bx,%es
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	movw	%bx,%es
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	movw	$e820table,%di
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	movw	$e820table_boot,%di
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	movb	$E820_MAX_RECORDS,e820counter
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	movb	$E820_MAX_RECORDS,e820counter_boot
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e820loop:
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e820loop:
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	movl	$E820_SMAP,%edx 	# control sequence "SMAP"
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	movl	$E820_SMAP,%edx 	# control sequence "SMAP"
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	movl	$0x0000e820,%eax	# service
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	movl	$0x0000e820,%eax	# service
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	movl	$E820_RECORD_SIZE,%ecx
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	movl	$E820_RECORD_SIZE,%ecx
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	movw	%di,%ax		# next record
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	movw	%di,%ax		# next record
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	addw	$E820_RECORD_SIZE,%ax
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	addw	$E820_RECORD_SIZE,%ax
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	movw	%ax,%di
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	movw	%ax,%di
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	decb	e820counter # buffer is full
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	decb	e820counter_boot # buffer is full
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	jz	e820end
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	jz	e820end
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	cmpl	$0,%ebx
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	cmpl	$0,%ebx
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	jne	e820loop
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	jne	e820loop
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e820end:
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e820end:
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	movb	$E820_MAX_RECORDS,%al
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	movb	$E820_MAX_RECORDS,%al
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	subb	e820counter,%al
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	subb	e820counter_boot,%al
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	movb	%al,e820counter # store # of valid entries in e820counter
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	movb	%al,e820counter_boot # store # of valid entries in e820counter
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	jmp	e801begin
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	jmp	e801begin
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e820err:
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e820err:
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	movb	$0,e820counter
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	movb	$0,e820counter_boot
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# method e801 - get size of memory
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# method e801 - get size of memory
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e801begin:
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e801begin:
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	xorw	%dx,%dx
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	xorw	%dx,%dx
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	ret
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	ret
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	#memory size in 1 kb chunks
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	#memory size in 1 kb chunks
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e801memorysize:
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e801memorysize:
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	.long	0
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	.long	0
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 - 
 
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e820counter:
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	.byte 0xff
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e820table:
 - 
 
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	.space  (32*E820_RECORD_SIZE),0xff # space for 32 records, each E820_RECORD_SIZE bytes long
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