Date: Wed, 14 Mar 2007 22:30:02 +0000 (UTC) From: Nate Lawson <njl@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/acpica acpi_wakeup.c src/sys/i386/i386 pmap.c Message-ID: <200703142230.l2EMU2Gi056810@repoman.freebsd.org>
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njl 2007-03-14 22:30:02 UTC
FreeBSD src repository
Modified files:
sys/i386/acpica acpi_wakeup.c
sys/i386/i386 pmap.c
Log:
Create an identity mapping (V=P) super page for the low memory region on
boot. Then, just switch to the kernel pmap when suspending instead of
allocating/freeing our own mapping every time. This should solve a panic
of pmap_remove() being called with interrupts disabled. Thanks to Alan
Cox for developing this patch.
Note: this means that ACPI requires super page (PG_PS) support in the CPU.
This has been present since the Pentium and first documented in the
Pentium Pro. However, it may need to be revisited later.
Submitted by: alc
MFC after: 1 month
Revision Changes Path
1.46 +6 -11 src/sys/i386/acpica/acpi_wakeup.c
1.583 +7 -0 src/sys/i386/i386/pmap.c
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