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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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