x86: Make sure wakeup trampoline code is below 1MB

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Instead of using bootmem, try find_e820_area()/reserve_early(),
and call acpi_reserve_memory() early, to allocate the wakeup
trampoline code area below 1M.

This is more reliable, and it also removes a dependency on
bootmem.

-v2: change function name to acpi_reserve_wakeup_memory(),
     as suggested by Rafael.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: pm list <linux-pm@lists.linux-foundation.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4AFA210B.3020207@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Yinghai Lu 2009-11-10 18:27:23 -08:00 • committed by Ingo Molnar

parent 0420101c07

commit 196cf0d67a

3 changed files with 17 additions and 13 deletions

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2

arch/x86/include/asm/acpi.h

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15

arch/x86/kernel/acpi/sleep.c

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13

arch/x86/kernel/setup.c

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