Cleanup the bios(4)/smbios(4) code a bit. Fix some KNF issues, reduce
differences between the i386 and amd64 versions of the code and
switch to using the standard C integer exact width integer types.

ok deraadt@

port the amd64 code for loading intel microcode on boot to i386
ok deraadt@ mlarkin@

Fix a couple of comment typos in amd64 and i386 biosvar.h

As early as possible, create a link /bsd.booted to the /bsd kernel we
presume we booted from. If you boot from another kernel, we cannot help
you later with hibernate, sorry -- The kernel does not get a useable
filename from the bootblocks.

In the bootblocks, detect a live hibernate signature and boot from
/bsd.booted instead.

with yasuoka, lots of discussion with mlarkin, ok tom

match amd64; bios_efi_info_t is required here as well, because acpidump
compiles on more than one platform.

Include executable mapping for BIOS32 pages. Fixes a problem where mappings
done in this region using PAE w/NX caused #PFs (as they lacked the exec
permission previously).

Also unmap the region when we're finished. No sense in leaving extra
executable regions lying around.

Fixes non-ACPI uniprocessor i386 machines that have NX/PAE (these would
previously panic in pcibiosattach).

ok deraadt@

Bring PAE code back to life, in a different form. This diff (via bluhm then
to deraadt, then myself) brings the PAE pmap on i386 (not touched in any
significant way for years) closer to the current non-PAE pmap and allows
us to take a big next step toward better i386 W^X in the kernel (similar to
what we did a few months ago on amd64). Unlike the original PAE pmap, this
diff will not be supporting > 4GB physical memory on i386 - this effort is
specifically geared toward providing W^X (via NX) only.

There still seems to be a bug removing certain pmap entries when PAE is
enabled, so I'm leaving PAE mode disabled for the moment until we can
figure out what is going on, but with this diff in the tree hopefully
others can help.

The pmap functions now operate through function pointers, due to the need
to support both non-PAE and PAE forms. My unscientific testing showed
less than 0.3% (a third of a percent) slowdown with this approach during
a base build.

Discussed for months with guenther, kettenis, and deraadt.

ok kettenis@, deraadt@

Cleanup bios_oconsdev_t. Make sure you have a halfway recent bootloader
(at least BOOT 3.20 on amd64 and BOOT 3.18 on i386) or you'll risk losing
your serial console.

ok deraadt@

refactor sys/param.h and machine/param.h. A lot of #ifdef _KERNEL is added
to keep definitions our of user space. The MD files now follow a consistant
order -- all namespace intrusion is at the tail can be cleaned up
independently. locore, bootblocks, and libkvm still see enough visibility to
build. Checked on 90% of platforms...

Allow boot(8) to pass information to the kernel, regarding the softraid
volume that it booted off.

Add support for serial consoles at non-standard addresses. This implements
a new "machine comaddr" command that makes it possible to configure the
io port used to access the serial port. This can be used to use serial ports
on a puc(4) device as serial console.

Pass the DUID of the boot disk via bootduid instead of rootduid, since it
is the DUID that we booted from, which is not always going to be the same
as the DUID that we mount root on.

Make amd64/i386 boot(8) pass the DUID of the selected boot device to the
kernel so that it can use it to identify the root disk. This will be
needed in order to correctly boot from a softraid volume.

ok deraadt@ marco@ krw@

Normalize sentinel. Use _MACHINE_*_H_ and _<ARCH>_*_H_ properly and consitently.

Discussed and okay drahn@. Okay deraadt@.

Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)

Remove unused (and dummied) bios console routines.

add support for passing db_console from the bootloader to the kernel.

based on the same change in amd64.

Install ACPI S3 resume trampoline code in a lowmem page. First part
of ACPI S3 suspend/resume support. This is for i386.

Help/comments from art, toby, marco, jordan, kurt
ok marco@, kurt@

Avoid #pragma pack(1) and unify everything towards using __packed.
This requires that structures defined within __packed structures must
independently request that they themselves become __packed, too.
worked on with toby
CVS: ----------------------------------------------------------------------

Hang acpi(4) below bios(4) instead of mainbus(4). This lets us move acpi(4)
before pcibios(4), and then.... if acpi(4) attaches, skip pcibios(4) since
it messes the machines up. Fixes claudio's HP dl320 G5, and almost assuredly
others.
ok kettenis

add bios_bootmac_t and BOOTARG_BOOTMAC

0x0006 is not a good value for a bit flag, so change it to 0x0008.

Spotted by kettenis@

ok mickey@

Add smbios support for i386 and amd64, fix ipmi to use this new functionallity,
hook up some sysctls to add system vendor/product/version and UUID reporting.

"get it in" deraadt@

bios gives 32bit units not paddr/psize; no func change

Enter cdboot, a CD-specific second-stage bootrap.

Testing krw@ and todd@, thanks.

assistance, testing and ok weingart@

debranch SMP, have fun

This var is volatile. gcc3 complains if the CV qualifiers don't match.
ok toby, mickey

three four kill

First round of __P removal in sys

Typo. Ok mickey@

branches: 1.38.6;
scan the isa hole for `optional rom's.
found proms are excluded from the iomem_ex such
that devices cannot map on the same memory.
next step would be for pcic and similar devices
to choose memory windows from unused spots
in the iomem_ex.
currently prom checksum test is not enforced
due to broken stinkpad bioses, which do not
pass the checksum test.
testing from aaron@, fgsch@, fries@, millert@

pcibios tells us everything, no bios_pciinfo

pcibios0 at bios0 flags 0x0000
this is now a real device, which looks in flags for disabling
address, interrupt or bus fixup.
bios0's flags are to disable bios32 and pcibios probing.
since boot_config support editing flags, it's posible
to adjust pcibios functionality in the generic kernel
upon boot time. man is coming.

from netbsd: pci interrupt routing code.
also, change a few pcidevs names to match netbsd (and more descriptive).
tested on a bunch of laptops, helps resolving 'pin X unmapped'
problems for (usually) usb and cardbus cntrollers.

export bios_pciinfo for the whole _KERNEL, there will be more files to use it

full support for a serial console.
iface addition: pass serial speed from /boot.
tested on 4 /boot+kernel permutations.
also, niklas@ said he likes it
bugs: any printfs before cninit() will go to the
default console, which is mon/kbd, but are usually
only sorts of debugging messages (like bios_memmap load).

branches: 1.32.2;
remove extraneous spaces and tabs

modify bootapiver chekups to use bitwise operations.
factor out /boot options parser from biosattach().
add logic to warn about ancient /boots.
cleanup vanishing cruft.
@niklas ok

give better support to the bios memory maps.
provide memory maps editing through the machine memory command.
rearrange probing in machdep, so it provides less output,
also giving a shot for apm to fix the memory maps.
changes to kernel are minimal, only that is required due
to the api version bits addition and such cosmetic changes.
tested on all critical kernel,boot combinations; niklas@ ok

provide suport for an apm data segemnt in the lower memory bios
data segment area, also calculate the apm segment lenghts.
niklas@ - ok

consdev to come

First commit of /boot changes/fixes. More to come.
Add BIOS PCI probe stuff.

Make booting new kernels with old bootblocks moer robust

A flag added to diskinfo used by the kernel to mark devices already mapped
to BSD dittos.

define fixed bootarg vector offset, and max len

map a piece of memory after the msgbuf and copy bootargv there.
pass cksumlen argument, sysctl it
mostly by niklas
me just did slite editing.

fix the case when data/code segment is not in the ISA memory
hole, so map 'em separatelly (or together if they intersect)
and use that mapped region for segment creations...
must help on some machines to avoid weird apm errors

support new libsa

get ready for the fix in memprobe

Copy in bios_diskinfo array from /boot space.
Add length field for checksum to same.
Start of making /boot deduce bsd dev_t for
all BIOS drives.

Cleanup, make it all compile.
Move APM stuff to apmprobe.c

Use BIOS to probe for memory map.
Probe for BIOS supported disks.
Use BIOS to get geometry for supported disks.

All in preparation to passing the whole thing
to the kernel.

Support for bios memory maps.

reserve void* at the of BIOS_vars for future use

make bios_geometry unsigned to avoid sign extension

apm0 at bios0
configs will be updated

branch the bios tree inside the machdep

pass cnvmem,extmem the old way they were....
don't put 'em in biosvars

support boot API version number

2nd part of pretty "machine diskinfo"

use words for apm functions
define struct of bios/boot vars to be passed to kernel

call BIOS inline (add struct EDD_cb into biosvar.h)

right DOINT for C

kentry proto is in the libsa.h
change var name

change vars names, add attach_args

adopt for assym.h

document bpb media types

add BIOS definitios/etc

port the amd64 code for loading intel microcode on boot to i386
ok deraadt@ mlarkin@

Fix a couple of comment typos in amd64 and i386 biosvar.h

As early as possible, create a link /bsd.booted to the /bsd kernel we
presume we booted from. If you boot from another kernel, we cannot help
you later with hibernate, sorry -- The kernel does not get a useable
filename from the bootblocks.

In the bootblocks, detect a live hibernate signature and boot from
/bsd.booted instead.

with yasuoka, lots of discussion with mlarkin, ok tom

match amd64; bios_efi_info_t is required here as well, because acpidump
compiles on more than one platform.

Include executable mapping for BIOS32 pages. Fixes a problem where mappings
done in this region using PAE w/NX caused #PFs (as they lacked the exec
permission previously).

Also unmap the region when we're finished. No sense in leaving extra
executable regions lying around.

Fixes non-ACPI uniprocessor i386 machines that have NX/PAE (these would
previously panic in pcibiosattach).

ok deraadt@

Bring PAE code back to life, in a different form. This diff (via bluhm then
to deraadt, then myself) brings the PAE pmap on i386 (not touched in any
significant way for years) closer to the current non-PAE pmap and allows
us to take a big next step toward better i386 W^X in the kernel (similar to
what we did a few months ago on amd64). Unlike the original PAE pmap, this
diff will not be supporting > 4GB physical memory on i386 - this effort is
specifically geared toward providing W^X (via NX) only.

There still seems to be a bug removing certain pmap entries when PAE is
enabled, so I'm leaving PAE mode disabled for the moment until we can
figure out what is going on, but with this diff in the tree hopefully
others can help.

The pmap functions now operate through function pointers, due to the need
to support both non-PAE and PAE forms. My unscientific testing showed
less than 0.3% (a third of a percent) slowdown with this approach during
a base build.

Discussed for months with guenther, kettenis, and deraadt.

ok kettenis@, deraadt@

Cleanup bios_oconsdev_t. Make sure you have a halfway recent bootloader
(at least BOOT 3.20 on amd64 and BOOT 3.18 on i386) or you'll risk losing
your serial console.

ok deraadt@

refactor sys/param.h and machine/param.h. A lot of #ifdef _KERNEL is added
to keep definitions our of user space. The MD files now follow a consistant
order -- all namespace intrusion is at the tail can be cleaned up
independently. locore, bootblocks, and libkvm still see enough visibility to
build. Checked on 90% of platforms...

Allow boot(8) to pass information to the kernel, regarding the softraid
volume that it booted off.

Add support for serial consoles at non-standard addresses. This implements
a new "machine comaddr" command that makes it possible to configure the
io port used to access the serial port. This can be used to use serial ports
on a puc(4) device as serial console.

Pass the DUID of the boot disk via bootduid instead of rootduid, since it
is the DUID that we booted from, which is not always going to be the same
as the DUID that we mount root on.

Make amd64/i386 boot(8) pass the DUID of the selected boot device to the
kernel so that it can use it to identify the root disk. This will be
needed in order to correctly boot from a softraid volume.

ok deraadt@ marco@ krw@

Normalize sentinel. Use _MACHINE_*_H_ and _<ARCH>_*_H_ properly and consitently.

Discussed and okay drahn@. Okay deraadt@.

Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)

Remove unused (and dummied) bios console routines.

add support for passing db_console from the bootloader to the kernel.

based on the same change in amd64.

Install ACPI S3 resume trampoline code in a lowmem page. First part
of ACPI S3 suspend/resume support. This is for i386.

Help/comments from art, toby, marco, jordan, kurt
ok marco@, kurt@

Avoid #pragma pack(1) and unify everything towards using __packed.
This requires that structures defined within __packed structures must
independently request that they themselves become __packed, too.
worked on with toby
CVS: ----------------------------------------------------------------------

Hang acpi(4) below bios(4) instead of mainbus(4). This lets us move acpi(4)
before pcibios(4), and then.... if acpi(4) attaches, skip pcibios(4) since
it messes the machines up. Fixes claudio's HP dl320 G5, and almost assuredly
others.
ok kettenis

add bios_bootmac_t and BOOTARG_BOOTMAC

0x0006 is not a good value for a bit flag, so change it to 0x0008.

Spotted by kettenis@

ok mickey@

Add smbios support for i386 and amd64, fix ipmi to use this new functionallity,
hook up some sysctls to add system vendor/product/version and UUID reporting.

"get it in" deraadt@

bios gives 32bit units not paddr/psize; no func change

Enter cdboot, a CD-specific second-stage bootrap.

Testing krw@ and todd@, thanks.

assistance, testing and ok weingart@

debranch SMP, have fun

This var is volatile. gcc3 complains if the CV qualifiers don't match.
ok toby, mickey

three four kill

First round of __P removal in sys

Typo. Ok mickey@

branches: 1.38.6;
scan the isa hole for `optional rom's.
found proms are excluded from the iomem_ex such
that devices cannot map on the same memory.
next step would be for pcic and similar devices
to choose memory windows from unused spots
in the iomem_ex.
currently prom checksum test is not enforced
due to broken stinkpad bioses, which do not
pass the checksum test.
testing from aaron@, fgsch@, fries@, millert@

pcibios tells us everything, no bios_pciinfo

pcibios0 at bios0 flags 0x0000
this is now a real device, which looks in flags for disabling
address, interrupt or bus fixup.
bios0's flags are to disable bios32 and pcibios probing.
since boot_config support editing flags, it's posible
to adjust pcibios functionality in the generic kernel
upon boot time. man is coming.

from netbsd: pci interrupt routing code.
also, change a few pcidevs names to match netbsd (and more descriptive).
tested on a bunch of laptops, helps resolving 'pin X unmapped'
problems for (usually) usb and cardbus cntrollers.

export bios_pciinfo for the whole _KERNEL, there will be more files to use it

full support for a serial console.
iface addition: pass serial speed from /boot.
tested on 4 /boot+kernel permutations.
also, niklas@ said he likes it
bugs: any printfs before cninit() will go to the
default console, which is mon/kbd, but are usually
only sorts of debugging messages (like bios_memmap load).

branches: 1.32.2;
remove extraneous spaces and tabs

modify bootapiver chekups to use bitwise operations.
factor out /boot options parser from biosattach().
add logic to warn about ancient /boots.
cleanup vanishing cruft.
@niklas ok

give better support to the bios memory maps.
provide memory maps editing through the machine memory command.
rearrange probing in machdep, so it provides less output,
also giving a shot for apm to fix the memory maps.
changes to kernel are minimal, only that is required due
to the api version bits addition and such cosmetic changes.
tested on all critical kernel,boot combinations; niklas@ ok

provide suport for an apm data segemnt in the lower memory bios
data segment area, also calculate the apm segment lenghts.
niklas@ - ok

consdev to come

First commit of /boot changes/fixes. More to come.
Add BIOS PCI probe stuff.

Make booting new kernels with old bootblocks moer robust

A flag added to diskinfo used by the kernel to mark devices already mapped
to BSD dittos.

define fixed bootarg vector offset, and max len

map a piece of memory after the msgbuf and copy bootargv there.
pass cksumlen argument, sysctl it
mostly by niklas
me just did slite editing.

fix the case when data/code segment is not in the ISA memory
hole, so map 'em separatelly (or together if they intersect)
and use that mapped region for segment creations...
must help on some machines to avoid weird apm errors

support new libsa

get ready for the fix in memprobe

Copy in bios_diskinfo array from /boot space.
Add length field for checksum to same.
Start of making /boot deduce bsd dev_t for
all BIOS drives.

Cleanup, make it all compile.
Move APM stuff to apmprobe.c

Use BIOS to probe for memory map.
Probe for BIOS supported disks.
Use BIOS to get geometry for supported disks.

All in preparation to passing the whole thing
to the kernel.

Support for bios memory maps.

reserve void* at the of BIOS_vars for future use

make bios_geometry unsigned to avoid sign extension

apm0 at bios0
configs will be updated

branch the bios tree inside the machdep

pass cnvmem,extmem the old way they were....
don't put 'em in biosvars

support boot API version number

2nd part of pretty "machine diskinfo"

use words for apm functions
define struct of bios/boot vars to be passed to kernel

call BIOS inline (add struct EDD_cb into biosvar.h)

right DOINT for C

kentry proto is in the libsa.h
change var name

change vars names, add attach_args

adopt for assym.h

document bpb media types

add BIOS definitios/etc

Fix a couple of comment typos in amd64 and i386 biosvar.h

As early as possible, create a link /bsd.booted to the /bsd kernel we
presume we booted from. If you boot from another kernel, we cannot help
you later with hibernate, sorry -- The kernel does not get a useable
filename from the bootblocks.

In the bootblocks, detect a live hibernate signature and boot from
/bsd.booted instead.

with yasuoka, lots of discussion with mlarkin, ok tom

match amd64; bios_efi_info_t is required here as well, because acpidump
compiles on more than one platform.

Include executable mapping for BIOS32 pages. Fixes a problem where mappings
done in this region using PAE w/NX caused #PFs (as they lacked the exec
permission previously).

Also unmap the region when we're finished. No sense in leaving extra
executable regions lying around.

Fixes non-ACPI uniprocessor i386 machines that have NX/PAE (these would
previously panic in pcibiosattach).

ok deraadt@

Bring PAE code back to life, in a different form. This diff (via bluhm then
to deraadt, then myself) brings the PAE pmap on i386 (not touched in any
significant way for years) closer to the current non-PAE pmap and allows
us to take a big next step toward better i386 W^X in the kernel (similar to
what we did a few months ago on amd64). Unlike the original PAE pmap, this
diff will not be supporting > 4GB physical memory on i386 - this effort is
specifically geared toward providing W^X (via NX) only.

There still seems to be a bug removing certain pmap entries when PAE is
enabled, so I'm leaving PAE mode disabled for the moment until we can
figure out what is going on, but with this diff in the tree hopefully
others can help.

The pmap functions now operate through function pointers, due to the need
to support both non-PAE and PAE forms. My unscientific testing showed
less than 0.3% (a third of a percent) slowdown with this approach during
a base build.

Discussed for months with guenther, kettenis, and deraadt.

ok kettenis@, deraadt@

Cleanup bios_oconsdev_t. Make sure you have a halfway recent bootloader
(at least BOOT 3.20 on amd64 and BOOT 3.18 on i386) or you'll risk losing
your serial console.

ok deraadt@

refactor sys/param.h and machine/param.h. A lot of #ifdef _KERNEL is added
to keep definitions our of user space. The MD files now follow a consistant
order -- all namespace intrusion is at the tail can be cleaned up
independently. locore, bootblocks, and libkvm still see enough visibility to
build. Checked on 90% of platforms...

Allow boot(8) to pass information to the kernel, regarding the softraid
volume that it booted off.

Add support for serial consoles at non-standard addresses. This implements
a new "machine comaddr" command that makes it possible to configure the
io port used to access the serial port. This can be used to use serial ports
on a puc(4) device as serial console.

Pass the DUID of the boot disk via bootduid instead of rootduid, since it
is the DUID that we booted from, which is not always going to be the same
as the DUID that we mount root on.

Make amd64/i386 boot(8) pass the DUID of the selected boot device to the
kernel so that it can use it to identify the root disk. This will be
needed in order to correctly boot from a softraid volume.

ok deraadt@ marco@ krw@

Normalize sentinel. Use _MACHINE_*_H_ and _<ARCH>_*_H_ properly and consitently.

Discussed and okay drahn@. Okay deraadt@.

Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)

Remove unused (and dummied) bios console routines.

add support for passing db_console from the bootloader to the kernel.

based on the same change in amd64.

Install ACPI S3 resume trampoline code in a lowmem page. First part
of ACPI S3 suspend/resume support. This is for i386.

Help/comments from art, toby, marco, jordan, kurt
ok marco@, kurt@

Avoid #pragma pack(1) and unify everything towards using __packed.
This requires that structures defined within __packed structures must
independently request that they themselves become __packed, too.
worked on with toby
CVS: ----------------------------------------------------------------------

Hang acpi(4) below bios(4) instead of mainbus(4). This lets us move acpi(4)
before pcibios(4), and then.... if acpi(4) attaches, skip pcibios(4) since
it messes the machines up. Fixes claudio's HP dl320 G5, and almost assuredly
others.
ok kettenis

add bios_bootmac_t and BOOTARG_BOOTMAC

0x0006 is not a good value for a bit flag, so change it to 0x0008.

Spotted by kettenis@

ok mickey@

Add smbios support for i386 and amd64, fix ipmi to use this new functionallity,
hook up some sysctls to add system vendor/product/version and UUID reporting.

"get it in" deraadt@

bios gives 32bit units not paddr/psize; no func change

Enter cdboot, a CD-specific second-stage bootrap.

Testing krw@ and todd@, thanks.

assistance, testing and ok weingart@

debranch SMP, have fun

This var is volatile. gcc3 complains if the CV qualifiers don't match.
ok toby, mickey

three four kill

First round of __P removal in sys

Typo. Ok mickey@

branches: 1.38.6;
scan the isa hole for `optional rom's.
found proms are excluded from the iomem_ex such
that devices cannot map on the same memory.
next step would be for pcic and similar devices
to choose memory windows from unused spots
in the iomem_ex.
currently prom checksum test is not enforced
due to broken stinkpad bioses, which do not
pass the checksum test.
testing from aaron@, fgsch@, fries@, millert@

pcibios tells us everything, no bios_pciinfo

pcibios0 at bios0 flags 0x0000
this is now a real device, which looks in flags for disabling
address, interrupt or bus fixup.
bios0's flags are to disable bios32 and pcibios probing.
since boot_config support editing flags, it's posible
to adjust pcibios functionality in the generic kernel
upon boot time. man is coming.

from netbsd: pci interrupt routing code.
also, change a few pcidevs names to match netbsd (and more descriptive).
tested on a bunch of laptops, helps resolving 'pin X unmapped'
problems for (usually) usb and cardbus cntrollers.

export bios_pciinfo for the whole _KERNEL, there will be more files to use it

full support for a serial console.
iface addition: pass serial speed from /boot.
tested on 4 /boot+kernel permutations.
also, niklas@ said he likes it
bugs: any printfs before cninit() will go to the
default console, which is mon/kbd, but are usually
only sorts of debugging messages (like bios_memmap load).

branches: 1.32.2;
remove extraneous spaces and tabs

modify bootapiver chekups to use bitwise operations.
factor out /boot options parser from biosattach().
add logic to warn about ancient /boots.
cleanup vanishing cruft.
@niklas ok

give better support to the bios memory maps.
provide memory maps editing through the machine memory command.
rearrange probing in machdep, so it provides less output,
also giving a shot for apm to fix the memory maps.
changes to kernel are minimal, only that is required due
to the api version bits addition and such cosmetic changes.
tested on all critical kernel,boot combinations; niklas@ ok

provide suport for an apm data segemnt in the lower memory bios
data segment area, also calculate the apm segment lenghts.
niklas@ - ok

consdev to come

First commit of /boot changes/fixes. More to come.
Add BIOS PCI probe stuff.

Make booting new kernels with old bootblocks moer robust

A flag added to diskinfo used by the kernel to mark devices already mapped
to BSD dittos.

define fixed bootarg vector offset, and max len

map a piece of memory after the msgbuf and copy bootargv there.
pass cksumlen argument, sysctl it
mostly by niklas
me just did slite editing.

fix the case when data/code segment is not in the ISA memory
hole, so map 'em separatelly (or together if they intersect)
and use that mapped region for segment creations...
must help on some machines to avoid weird apm errors

support new libsa

get ready for the fix in memprobe

Copy in bios_diskinfo array from /boot space.
Add length field for checksum to same.
Start of making /boot deduce bsd dev_t for
all BIOS drives.

Cleanup, make it all compile.
Move APM stuff to apmprobe.c

Use BIOS to probe for memory map.
Probe for BIOS supported disks.
Use BIOS to get geometry for supported disks.

All in preparation to passing the whole thing
to the kernel.

Support for bios memory maps.

reserve void* at the of BIOS_vars for future use

make bios_geometry unsigned to avoid sign extension

apm0 at bios0
configs will be updated

branch the bios tree inside the machdep

pass cnvmem,extmem the old way they were....
don't put 'em in biosvars

support boot API version number

2nd part of pretty "machine diskinfo"

use words for apm functions
define struct of bios/boot vars to be passed to kernel

call BIOS inline (add struct EDD_cb into biosvar.h)

right DOINT for C

kentry proto is in the libsa.h
change var name

change vars names, add attach_args

adopt for assym.h

document bpb media types

add BIOS definitios/etc