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| author | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-12-17 02:13:00 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-12-17 02:13:00 +0000 |
| commit | fb8a1b44a8ae6b6fb600b8ab50ccce631d873971 (patch) | |
| tree | d5a9766fff0478f6ed55b19ec24789073d4aa278 /MdePkg | |
| parent | 50399ec18f5898567ffbf75be2a4444361918b63 (diff) | |
| download | edk2-platforms-fb8a1b44a8ae6b6fb600b8ab50ccce631d873971.tar.xz | |
OvmfPkg: report S3 state in DSDT
The ACPI 5.0 specification says:
7.3.4.4 System \_S3 State
[...]
* Dynamic RAM context is maintained.
[...]
This corresponds to the following in the PIIX4 spec:
PMCNTRL -- POWER MANAGEMENT CONTROL REGISTER (IO)
[...]
Bits[12:10] Suspend Type
[...]
001 STR (Suspend To RAM)
Also, this (ie. decimal 1) is the suspend type value that qemu recognizes
as an S3 (suspend to ram) request.
Only the value for PM1a_CNT.SLP_TYP is set (PM1b_CNT.SLP_TYP is left at
zero), since in OVMF we don't report the optional PM1b_EVT_BLK register
block to OSPM. (PM1b_EVT_BLK is defined as 0 in "Platform.h"; see "4.8.1.1
PM1 Event Registers" in the ACPI 5.0 specification.)
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14002 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg')
0 files changed, 0 insertions, 0 deletions