Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

MFaltix:
Add support for Pre-Boot Virtual Memory (PBVM) to the loader.

PBVM allows us to link the kernel at a fixed virtual address without
having to make any assumptions about the physical memory layout. On
the SGI Altix 350 for example, there's no usuable physical memory
below 192GB. Also, the PBVM allows us to control better where we're
going to physically load the kernel and its modules so that we can
make sure we load the kernel in memory that's close to the BSP.

The PBVM is managed by a simple page table. The minimum size of the
page table is 4KB (EFI page size) and the maximum is currently set
to 1MB. A page in the PBVM is 64KB, as that's the maximum alignment
one can specify in a linker script. The bottom line is that PBVM is
between 64KB and 8GB in size.

The loader maps the PBVM page table at a fixed virtual address and
using a single translations. The PBVM itself is also mapped using a
single translation for a maximum of 32MB.

While here, increase the heap in the EFI loader from 512KB to 2MB
and set the stage for supporting relocatable modules.

Major rework of the ia64 loaders. The two primary objectives are:
1. Make libefi portable by removing ia64 specific code and build
it on i386 and amd64 by default to prevent regressions. These
changes include fixes and improvements over previous code to
establish or improve APIs where none existed or when the amount
of kluging was unacceptably high.
2. Increase the amount of sharing between the efi and ski loaders
to improve maintainability of the loaders and simplify making
changes to the loader-kernel handshaking in the future.

The version of the efi and ski loaders are now both changed to 1.2
as user visible improvements and changes have been made.

Forced commit to document that the following repo copy has been
performed:

from: src/sys/boot/efi/libefi/bootinfo.c
to: src/sys/boot/ia64/common/bootinfo.c

from: src/sys/boot/efi/libefi/copy.c
to: src/sys/boot/ia64/common/copy.c

from: src/sys/boot/efi/libefi/devicename.c
to: src/sys/boot/ia64/common/devicename.c

from: src/sys/boot/efi/libefi/elf_freebsd.c
to: src/sys/boot/ia64/common/exec.c

ncvs meister: simon (thanks!)

Remove more Alpha bits from the boot code including fixing several
stale comments.

Add loader(8) variables for RB_DFLTROOT, RB_MUTE, and RB_PAUSE:
"boot_dfltroot", "boot_mute", and "boot_pause" respectively.

Remove the last vestiges of the userconfig option. None of this actually
did anything, so this commit should be considered a NO-OP.

Convert to __FBSDID.

Simplify page alignment.

Pass the HCDP table address to the kernel. If no such table exists,
NULL is passed. The address of the HCDP table can be found by
iterating over the configuration tables in the EFI system table.
To avoid more duplication, a function can be called with the GUID
of interest. The function will do the scanning. Use the function
in all places where we iterate over the configuration tables in
an attempt to find a specific one.

Bump the loader version number as the result of this.

Approved by: re (blanket)

o Fix a size calculation based on a 8KB page, while under EFI
pages are 4KB.
o As a second order fix, don't assume we have enough space
after the bootinfo block left in a page to hold the memory
map.
o A third order fix as that we removed the assumption that a
bootinfo block fits in a single 8KB page.

PR: ia64/39415
submitted by: Espen Skoglund <esk@ira.uka.de>

Add boot_serial and boot_multicons variables to set RB_SERIAL and
RB_MULTIPLE since this seems to be the easiest way to add these flags
for non-forth loaders etc.

Lookup the EFI_FPSWA driver and pass the interface pointer through to the
kernel before we call ExitBootServices(). I've typed the definitions
in efifpswa.h from the Intel FPSWA manual (urk).

Remove bootinfo.bi_kernel. It isn't used by the kernel. struct bootinfo
should go away on ia64, we should be loader metadata based since that is
the only way we can boot (loader, skiload).

Set RB_MULTIPLE (multiple console support) if the kernel is booted
with the -D flag.

Return the mapkey which EFI gave us when we read the memory map - we need
it to call ExitBootServices.

* Flesh out elf_exec and bootinfo.
* Add EFI network support.