X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fboot%2Fsetup.S;h=12ea0b6c52e2a8b48cea525ec530d49b8c1d97a5;hb=9464c7cf61b9433057924c36e6e02f303a00e768;hp=48479ec1ad365401062d931e5e911368e7e63bb2;hpb=daddc0d38b3571bed170afa273a49a0eba090c1e;p=linux-2.6.git

diff --git a/arch/x86_64/boot/setup.S b/arch/x86_64/boot/setup.S
index 48479ec1a..12ea0b6c5 100644
--- a/arch/x86_64/boot/setup.S
+++ b/arch/x86_64/boot/setup.S
@@ -33,7 +33,7 @@
  * Transcribed from Intel (as86) -> AT&T (gas) by Chris Noe, May 1999.
  * <stiker@northlink.com>
  *
- * Fix to work around buggy BIOSes which dont use carry bit correctly
+ * Fix to work around buggy BIOSes which don't use carry bit correctly
  * and/or report extended memory in CX/DX for e801h memory size detection 
  * call.  As a result the kernel got wrong figures.  The int15/e801h docs
  * from Ralf Brown interrupt list seem to indicate AX/BX should be used
@@ -81,7 +81,7 @@ start:
 # This is the setup header, and it must start at %cs:2 (old 0x9020:2)
 
 		.ascii	"HdrS"		# header signature
-		.word	0x0203		# header version number (>= 0x0105)
+		.word	0x0204		# header version number (>= 0x0105)
 					# or else old loadlin-1.5 will fail)
 realmode_swtch:	.word	0, 0		# default_switch, SETUPSEG
 start_sys_seg:	.word	SYSSEG
@@ -132,7 +132,7 @@ ramdisk_image:	.long	0		# address of loaded ramdisk image
 ramdisk_size:	.long	0		# its size in bytes
 
 bootsect_kludge:
-		.word  bootsect_helper, SETUPSEG
+		.long	0		# obsolete
 
 heap_end_ptr:	.word	modelist+1024	# (Header version 0x0201 or later)
 					# space from here (exclusive) down to
@@ -158,7 +158,9 @@ cmd_line_ptr:	.long 0			# (Header version 0x0202 or later)
 ramdisk_max:	.long 0xffffffff
 	
 trampoline:	call	start_of_setup
-		.space	1024
+		.align 16
+					# The offset at this point is 0x240
+		.space  (0xeff-0x240+1)	# E820 & EDD space (ending at 0xeff)
 # End of setup header #####################################################
 
 start_of_setup:
@@ -381,7 +383,7 @@ sse_ok:
 # a whole bunch of different types, and allows memory holes and
 # everything.  We scan through this memory map and build a list
 # of the first 32 memory areas, which we return at [E820MAP].
-# This is documented at http://www.teleport.com/~acpi/acpihtml/topic245.htm
+# This is documented at http://www.acpi.info/, in the ACPI 2.0 specification.
 
 #define SMAP  0x534d4150
 
@@ -410,9 +412,9 @@ jmpe820:
 	# sizeof(e820rec).
 	#
 good820:
-	movb	(E820NR), %al			# up to 32 entries
+	movb	(E820NR), %al			# up to 128 entries
 	cmpb	$E820MAX, %al
-	jnl	bail820
+	jae	bail820
 
 	incb	(E820NR)
 	movw	%di, %ax
@@ -434,7 +436,7 @@ bail820:
 
 meme801:
 	stc					# fix to work around buggy
-	xorw	%cx,%cx				# BIOSes which dont clear/set
+	xorw	%cx,%cx				# BIOSes which don't clear/set
 	xorw	%dx,%dx				# carry on pass/error of
 						# e801h memory size call
 						# or merely pass cx,dx though
@@ -731,7 +733,7 @@ flush_instr:
 #
 #	but we yet haven't reloaded the CS register, so the default size 
 #	of the target offset still is 16 bit.
-#       However, using an operant prefix (0x66), the CPU will properly
+#	However, using an operand prefix (0x66), the CPU will properly
 #	take our 48 bit far pointer. (INTeL 80386 Programmer's Reference
 #	Manual, Mixing 16-bit and 32-bit code, page 16-6)
 
@@ -759,87 +761,6 @@ default_switch:
 	outb	%al, $0x70
 	lret
 
-# This routine only gets called, if we get loaded by the simple
-# bootsect loader _and_ have a bzImage to load.
-# Because there is no place left in the 512 bytes of the boot sector,
-# we must emigrate to code space here.
-bootsect_helper:
-	cmpw	$0, %cs:bootsect_es
-	jnz	bootsect_second
-
-	movb	$0x20, %cs:type_of_loader
-	movw	%es, %ax
-	shrw	$4, %ax
-	movb	%ah, %cs:bootsect_src_base+2
-	movw	%es, %ax
-	movw	%ax, %cs:bootsect_es
-	subw	$SYSSEG, %ax
-	lret					# nothing else to do for now
-
-bootsect_second:
-	pushw	%cx
-	pushw	%si
-	pushw	%bx
-	testw	%bx, %bx			# 64K full?
-	jne	bootsect_ex
-
-	movw	$0x8000, %cx			# full 64K, INT15 moves words
-	pushw	%cs
-	popw	%es
-	movw	$bootsect_gdt, %si
-	movw	$0x8700, %ax
-	int	$0x15
-	jc	bootsect_panic			# this, if INT15 fails
-
-	movw	%cs:bootsect_es, %es		# we reset %es to always point
-	incb	%cs:bootsect_dst_base+2		# to 0x10000
-bootsect_ex:
-	movb	%cs:bootsect_dst_base+2, %ah
-	shlb	$4, %ah				# we now have the number of
-						# moved frames in %ax
-	xorb	%al, %al
-	popw	%bx
-	popw	%si
-	popw	%cx
-	lret
-
-bootsect_gdt:
-	.word	0, 0, 0, 0
-	.word	0, 0, 0, 0
-
-bootsect_src:
-	.word	0xffff
-
-bootsect_src_base:
-	.byte	0x00, 0x00, 0x01		# base = 0x010000
-	.byte	0x93				# typbyte
-	.word	0				# limit16,base24 =0
-
-bootsect_dst:
-	.word	0xffff
-
-bootsect_dst_base:
-	.byte	0x00, 0x00, 0x10		# base = 0x100000
-	.byte	0x93				# typbyte
-	.word	0				# limit16,base24 =0
-	.word	0, 0, 0, 0			# BIOS CS
-	.word	0, 0, 0, 0			# BIOS DS
-
-bootsect_es:
-	.word	0
-
-bootsect_panic:
-	pushw	%cs
-	popw	%ds
-	cld
-	leaw	bootsect_panic_mess, %si
-	call	prtstr
-	
-bootsect_panic_loop:
-	jmp	bootsect_panic_loop
-
-bootsect_panic_mess:
-	.string	"INT15 refuses to access high mem, giving up."
 
 # This routine checks that the keyboard command queue is empty
 # (after emptying the output buffers)