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| author | H. Peter Anvin <hpa@zytor.com> | 2009-05-12 00:56:08 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-05-12 02:44:39 +0200 |
| commit | 37ba7ab5e33cebc25c68fffe33e9f21e7c2014e8 (patch) | |
| tree | 006ba60fcd29b8fdee844ee6d90b85104a254d0d /arch/x86/kernel | |
| parent | x86, boot: remove dead code from boot/compressed/head_*.S (diff) | |
| download | linux-37ba7ab5e33cebc25c68fffe33e9f21e7c2014e8.tar.xz linux-37ba7ab5e33cebc25c68fffe33e9f21e7c2014e8.zip | |
x86, boot: make kernel_alignment adjustable; new bzImage fields
Make the kernel_alignment field adjustable; this allows us to set it
to a large value (intended to be 16 MB to avoid ZONE_DMA contention,
memory holes and other weirdness) while a smart bootloader can still
force a loading at a lesser alignment if absolutely necessary.
Also export pref_address (preferred loading address, corresponding to
the link-time address) and init_size, the total amount of linear
memory the kernel will require during initialization.
[ Impact: allows better kernel placement, gives bootloader more info ]
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/asm-offsets_32.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/asm-offsets_64.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c index 5a6aa1c1162f..1a830cbd7015 100644 --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.c @@ -146,4 +146,5 @@ void foo(void) OFFSET(BP_loadflags, boot_params, hdr.loadflags); OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch); OFFSET(BP_version, boot_params, hdr.version); + OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment); } diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c index e72f062fb4b5..898ecc47e129 100644 --- a/arch/x86/kernel/asm-offsets_64.c +++ b/arch/x86/kernel/asm-offsets_64.c @@ -125,6 +125,7 @@ int main(void) OFFSET(BP_loadflags, boot_params, hdr.loadflags); OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch); OFFSET(BP_version, boot_params, hdr.version); + OFFSET(BP_kernel_alignment, boot_params, hdr.kernel_alignment); BLANK(); DEFINE(PAGE_SIZE_asm, PAGE_SIZE); |