[PATCH 19/20] x86_64: Extend bzImage protocol for relocatable kernel

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




o Extend the bzImage protocol (same as i386) to allow bzImage loaders to
  load the protected mode kernel at non-1MB address. Now protected mode
  component is relocatable and can be loaded at non-1MB addresses.

o As of today kdump uses it to run a second kernel from a reserved memory
  area.

Signed-off-by: Vivek Goyal <[email protected]>
---

 arch/x86_64/boot/setup.S |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff -puN arch/x86_64/boot/setup.S~x86_64-extend-bzImage-protocol-for-relocatable-bzImage arch/x86_64/boot/setup.S
--- linux-2.6.19-rc6-reloc/arch/x86_64/boot/setup.S~x86_64-extend-bzImage-protocol-for-relocatable-bzImage	2006-11-17 00:13:38.000000000 -0500
+++ linux-2.6.19-rc6-reloc-root/arch/x86_64/boot/setup.S	2006-11-17 00:13:38.000000000 -0500
@@ -80,7 +80,7 @@ start:
 # This is the setup header, and it must start at %cs:2 (old 0x9020:2)
 
 		.ascii	"HdrS"		# header signature
-		.word	0x0204		# header version number (>= 0x0105)
+		.word	0x0205		# 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
@@ -155,7 +155,12 @@ cmd_line_ptr:	.long 0			# (Header versio
 					# low memory 0x10000 or higher.
 
 ramdisk_max:	.long 0xffffffff
-	
+kernel_alignment:  .long 0x200000       # physical addr alignment required for
+					# protected mode relocatable kernel
+relocatable_kernel:    .byte 1
+pad2:                  .byte 0
+pad3:                  .word 0
+
 trampoline:	call	start_of_setup
 		.align 16
 					# The offset at this point is 0x240
_
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux