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    Subjectx86 setup code rewrite in C - revised
    Date
    This patch set replaces the x86 setup code, which is currently all in
    assembly, with a version written in C, using the ".code16gcc" feature
    of binutils (which has been present since at least 2001.)

    The new code is vastly easier to read, and, I hope, debug. It should
    be noted that I found a fair number of minor bugs while going through
    this code, and have attempted to correct them.

    In the process of doing so, it introduces several cleanups, in
    particular:

    - Obsoletes the hd_info field in the boot_params structure; they are
    only ever used for ST-506 (pre-IDE) drives and are pretty much
    guaranteed to be wrong on current BIOSes;
    - Unifies the CPU feature bits between i386 and x86-64. In the
    future, it should be possible to use arch/i386/boot/cpucheck.c to do
    the post-invocation CPU check currently done in
    arch/x86_64/kernel/trampoline.S, although this patch set doesn't
    introduce that change.
    - boot_params is now a proper structure.

    This patchset incorporates all feedback received by 2007-07-11 12:00 PDT.

    arch/i386/boot/bootsect.S | 98 -
    arch/i386/boot/edd.S | 231 --
    arch/i386/boot/setup.S | 1075 -------------
    arch/i386/boot/video.S | 2043 --------------------------
    arch/i386/kernel/verify_cpu.S | 94 -
    arch/x86_64/boot/bootsect.S | 98 -
    arch/x86_64/boot/install.sh | 2
    arch/x86_64/boot/mtools.conf.in | 17
    arch/x86_64/boot/setup.S | 826 ----------
    arch/x86_64/boot/tools/build.c | 185 --
    b/Documentation/i386/zero-page.txt | 1
    b/MAINTAINERS | 4
    b/arch/i386/Kconfig.cpu | 6
    b/arch/i386/boot/Makefile | 48
    b/arch/i386/boot/a20.c | 161 ++
    b/arch/i386/boot/apm.c | 97 +
    b/arch/i386/boot/bitops.h | 45
    b/arch/i386/boot/boot.h | 296 +++
    b/arch/i386/boot/cmdline.c | 97 +
    b/arch/i386/boot/code16gcc.h | 15
    b/arch/i386/boot/compressed/Makefile | 7
    b/arch/i386/boot/compressed/head.S | 6
    b/arch/i386/boot/copy.S | 101 +
    b/arch/i386/boot/cpu.c | 69
    b/arch/i386/boot/cpucheck.c | 267 +++
    b/arch/i386/boot/edd.c | 196 ++
    b/arch/i386/boot/header.S | 283 +++
    b/arch/i386/boot/main.c | 161 ++
    b/arch/i386/boot/mca.c | 43
    b/arch/i386/boot/memory.c | 99 +
    b/arch/i386/boot/pm.c | 170 ++
    b/arch/i386/boot/pmjump.S | 54
    b/arch/i386/boot/printf.c | 307 +++
    b/arch/i386/boot/setup.ld | 54
    b/arch/i386/boot/string.c | 52
    b/arch/i386/boot/tools/build.c | 160 --
    b/arch/i386/boot/tty.c | 112 +
    b/arch/i386/boot/version.c | 23
    b/arch/i386/boot/vesa.h | 79 +
    b/arch/i386/boot/video-bios.c | 125 +
    b/arch/i386/boot/video-vesa.c | 284 +++
    b/arch/i386/boot/video-vga.c | 260 +++
    b/arch/i386/boot/video.c | 456 +++++
    b/arch/i386/boot/video.h | 145 +
    b/arch/i386/boot/voyager.c | 46
    b/arch/i386/kernel/cpu/Makefile | 2
    b/arch/i386/kernel/cpu/addon_cpuid_features.c | 50
    b/arch/i386/kernel/cpu/common.c | 2
    b/arch/i386/kernel/cpu/proc.c | 21
    b/arch/i386/kernel/e820.c | 2
    b/arch/i386/kernel/setup.c | 12
    b/arch/x86_64/Kconfig | 4
    b/arch/x86_64/boot/Makefile | 136 -
    b/arch/x86_64/boot/compressed/Makefile | 9
    b/arch/x86_64/boot/compressed/head.S | 6
    b/arch/x86_64/kernel/Makefile | 2
    b/arch/x86_64/kernel/setup.c | 21
    b/arch/x86_64/kernel/verify_cpu.S | 22
    b/drivers/ide/legacy/hd.c | 73
    b/include/asm-i386/boot.h | 6
    b/include/asm-i386/bootparam.h | 85 +
    b/include/asm-i386/cpufeature.h | 26
    b/include/asm-i386/e820.h | 14
    b/include/asm-i386/processor.h | 1
    b/include/asm-i386/required-features.h | 39
    b/include/asm-i386/setup.h | 10
    b/include/asm-x86_64/alternative.h | 68
    b/include/asm-x86_64/boot.h | 16
    b/include/asm-x86_64/bootparam.h | 1
    b/include/asm-x86_64/cpufeature.h | 115 -
    b/include/asm-x86_64/e820.h | 4
    b/include/asm-x86_64/processor.h | 3
    b/include/asm-x86_64/required-features.h | 46
    b/include/asm-x86_64/segment.h | 8
    b/include/linux/edd.h | 4
    b/include/linux/screen_info.h | 9
    76 files changed, 4606 insertions(+), 5209 deletions(-)
    -
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