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fix the following 'make headers_check' warning:
usr/include/linux/edd.h:70: found __[us]{8,16,32,64} type without #include <linux/types.h>
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
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To actually write a bootloader (or, say, the lguest launcher)
currently requires duplication of these structures. Making them
includable from userspace is much nicer.
We merge the common userspace-required definitions of e820_32/64.h
into e820.h for export.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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This removes the old i386 setup code. This is done as a separate patch
to avoid breaking git bisect as some of the i386 code was also used by
the old x86-64 code.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The EDD code would scan the command line as a fixed array, without
taking account of either whitespace, null-termination, the old
command-line protocol, late overrides early, or the fact that the
command line may not be reachable from INITSEG.
This should fix those problems, and enable us to use a longer command
line.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andi Kleen <ak@suse.de>
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The specifications that talk about E820 map doesn't have an upper limit on
the number of e820 entries. But, today's kernel has a hard limit of 32.
With increase in memory size, we are seeing the number of E820 entries
reaching close to 32. Patch below bumps the number upto 128.
The patch changes the location of EDDBUF in zero-page (as it comes after E820).
As, EDDBUF is not used by boot loaders, this patch should not have any effect
on bootloader-setup code interface.
Patch covers both i386 and x86-64.
Tested on:
* grub booting bzImage
* lilo booting bzImage with EDID info enabled
* pxeboot of bzImage
Side-effect:
bss increases by ~ 2K and init.data increases by ~7.5K
on all systems, due to increase in size of static arrays.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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EDD: add edd=off and edd=skipmbr command line options
New command line options
edd=off (or edd=of)
edd=skipmbr (or edd=sk)
runtime options for disabling all EDD int13 calls completely, or for
skipping the int13 READ SECTOR calls, respectively.
These are provided to allow Linux distributions to include CONFIG_EDD=m, yet
allow end-users to disable parts of EDD which may not work well with their
system's BIOS.
I incorporated comments from Randy Dunlap, and got an ack from Andi Kleen.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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It seems to result in unexplained memory corruption. Matt is working on it.
Cset exclude: Matt_Domsch@dell.com[torvalds]|ChangeSet|20041020153622|50713
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Some controller BIOSes have problems with the legacy int13 fn02 READ
SECTORS command. int13 fn42 EXTENDED READ is used in preference by most
boot loaders today, so lets use that. If EXTENDED READ fails or isn't
supported, fall back to READ SECTORS.
This hopefully resolves the three reports of BIOSes which would either
long-pause (30+ seconds) or hang completely on the legacy READ SECTORS
command.
This also adds CONFIG_EDD_SKIP_MBR to eliminate reading the MBR on each
BIOS-presented disk, in case there are further problems in this area.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Currently, the x86/x86_64 real-mode kernel setup code reads and stores the
mbr_signature (4 bytes in the MBR at offset 440 decimal) for BIOS int13h
device 80h only. This is useful, but not as useful as if we stored such
signatures for all int13h devices. Think OS installer wanting to set up md
software RAID across several BIOS disks.
Patch below against 2.6.7 allows the storing of the mbr_signature for the
first 16 BIOS int13h devices, and exports them via
/sys/firmware/edd/int13_dev8x/mbr_signature as before.
This also merges the three EXPORT_SYMBOLs that setup.c exported for edd.c's
use into one.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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From: "Patrick J. LoPresti" <patl@users.sourceforge.net>
Renames legacy_heads to legacy_max_head legacy_sectors to
legacy_sectors_per_track.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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From: Matt Domsch <Matt_Domsch@dell.com>
Three patches to move the BIOS Enhanced Disk Drive code from i386-specific
locations into more generic locations, which will allow it to be used on
x86-64 as well.
move edd.h from include/asm-i386 to include/linux
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