diff options
| author | Vivek Goyal <vgoyal@in.ibm.com> | 2006-12-07 02:14:04 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:04 +0100 |
| commit | e69f202d0a1419219198566e1c22218a5c71a9a6 (patch) | |
| tree | 16bb59505500797e1ea7e09ee9c3b495ce65b76a /arch/i386/kernel/vmlinux.lds.S | |
| parent | 6a044b3a0a1829ef19bb29548ffe553f48e8d80c (diff) | |
[PATCH] i386: Implement CONFIG_PHYSICAL_ALIGN
o Now CONFIG_PHYSICAL_START is being replaced with CONFIG_PHYSICAL_ALIGN.
Hardcoding the kernel physical start value creates a problem in relocatable
kernel context due to boot loader limitations. For ex, if somebody
compiles a relocatable kernel to be run from address 4MB, but this kernel
will run from location 1MB as grub loads the kernel at physical address
1MB. Kernel thinks that I am a relocatable kernel and I should run from
the address I have been loaded at. So somebody wanting to run kernel
from 4MB alignment location (for improved performance regions) can't do
that.
o Hence, Eric proposed that probably CONFIG_PHYSICAL_ALIGN will make
more sense in relocatable kernel context. At run time kernel will move
itself to a physical addr location which meets user specified alignment
restrictions.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/i386/kernel/vmlinux.lds.S')
| -rw-r--r-- | arch/i386/kernel/vmlinux.lds.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S index f8d61ec4c8c..6860f20aa57 100644 --- a/arch/i386/kernel/vmlinux.lds.S +++ b/arch/i386/kernel/vmlinux.lds.S @@ -14,6 +14,7 @@ #include <asm/thread_info.h> #include <asm/page.h> #include <asm/cache.h> +#include <asm/boot.h> OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") OUTPUT_ARCH(i386) @@ -27,7 +28,7 @@ PHDRS { } SECTIONS { - . = LOAD_OFFSET + CONFIG_PHYSICAL_START; + . = LOAD_OFFSET + LOAD_PHYSICAL_ADDR; phys_startup_32 = startup_32 - LOAD_OFFSET; /* read-only */ .text : AT(ADDR(.text) - LOAD_OFFSET) { |