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| author | Vivek Goyal <vgoyal@in.ibm.com> | 2007-05-02 19:27:08 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:08 +0200 |
| commit | 8035d3ea78c2a61a9738c7857742370e0aa74d5c (patch) | |
| tree | fad1a7d5af880f26451417b514d513640828b409 /arch | |
| parent | 6a50a664ca0cfd2a487525f10cec3ff4d570b5e8 (diff) | |
| download | linux-8035d3ea78c2a61a9738c7857742370e0aa74d5c.tar.gz linux-8035d3ea78c2a61a9738c7857742370e0aa74d5c.tar.bz2 linux-8035d3ea78c2a61a9738c7857742370e0aa74d5c.zip | |
[PATCH] x86-64: Extend bzImage protocol for relocatable bzImage
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 <vgoyal@in.ibm.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/boot/setup.S | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/x86_64/boot/setup.S b/arch/x86_64/boot/setup.S index 770940cc0108..deb3573c7aec 100644 --- a/arch/x86_64/boot/setup.S +++ b/arch/x86_64/boot/setup.S @@ -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 +155,16 @@ cmd_line_ptr: .long 0 # (Header version 0x0202 or later) # low memory 0x10000 or higher. ramdisk_max: .long 0xffffffff - +kernel_alignment: .long 0x200000 # physical addr alignment required for + # protected mode relocatable kernel +#ifdef CONFIG_RELOCATABLE +relocatable_kernel: .byte 1 +#else +relocatable_kernel: .byte 0 +#endif +pad2: .byte 0 +pad3: .word 0 + trampoline: call start_of_setup .align 16 # The offset at this point is 0x240 |