Split the ACPI resume trampoline into code and data, move the data page to
.rodata (kernel copies to the RW page), protect the code page with RX
permissions, protect the code page with RW permissions

Split the ACPI resume trampoline into code and data, move the data page to
.rodata (kernel copies to the RW page), protect the code page with RX
permissions, protect the code page with RW permissions.

ok deraadt@

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Previous diff changed the location of the ACPI S3/S4 trampoline, which has
a common #defined location for both i386 and amd64. This diff fixes i386 to
match.

Also fix a tab/space issue in amd64 hibe

Previous diff changed the location of the ACPI S3/S4 trampoline, which has
a common #defined location for both i386 and amd64. This diff fixes i386 to
match.

Also fix a tab/space issue in amd64 hibernate_var.h

discussed with deraadt

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Split the MP trampoline into two pages, one for code and one for data/stack
and then protect the code page as RX and the data/stack page as RW (NX).

ok deraadt@

Move some hibernate #defines to pte.h and eliminate some duplicate defines
from hibernate code that were already defined in pte.h (with different
names). No functional change.

ok sf@, deraadt@

HIBERNATE_SELTABLE is not used anymore. Remove, and reclaim its stolen
page.

Don't use the first 64KB for anything, including tramps. Move tramps and
hibernate goo up after 64KB to avoid posible corruption by buggy BIOS SMM
code. Diff also ensures the first 64KB doesn't get h

Don't use the first 64KB for anything, including tramps. Move tramps and
hibernate goo up after 64KB to avoid posible corruption by buggy BIOS SMM
code. Diff also ensures the first 64KB doesn't get handed to UVM either.

ok deraadt@, tested by many with no regressions reported

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Remove remaining references to HIBERNATE_COPY_PAGE. It was effectively
removed at n2k13 but a few errant references still remained. No functional
change. Spot tested by my on i386 and amd64 UP enviro

Remove remaining references to HIBERNATE_COPY_PAGE. It was effectively
removed at n2k13 but a few errant references still remained. No functional
change. Spot tested by my on i386 and amd64 UP environments, no regressions
seen.

noticed by deraadt@

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Add RCS ids.

Even though we reserve 3 pages for the amd64 hibernate stack, we set the
resume time stack pointer to the first page reserved, effectively giving us
only one page to work with. Found when I was debug

Even though we reserve 3 pages for the amd64 hibernate stack, we set the
resume time stack pointer to the first page reserved, effectively giving us
only one page to work with. Found when I was debugging some unrelated stack
issues in the resume code.

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MD hibernate goo for amd64

amd64 hibernate "unpack-time" mmu/pmap code and asm goo. Work in
progress.

Starting point for amd64 hibernate ... some goo copied from i386.
This does not yet work for amd64 - getting the structure into the tree so
others can help.