Introduce the following APIs:
- QemuFwCfgS3CallWhenBootScriptReady(): central function that registers a
callback function, with a context parameter, for when ACPI S3 Boot
Script opcodes can be produced. This function also allocates reserved
memory for the opcodes to operate upon.
The client module is supposed to produce the boot script fragment in the
callback function.
- QemuFwCfgS3ScriptWriteBytes(), QemuFwCfgS3ScriptReadBytes(),
QemuFwCfgS3ScriptSkipBytes(), QemuFwCfgS3ScriptCheckValue(): helper
functions, available only to the above callback function, for composing
the boot script fragment. QemuFwCfgS3ScriptSkipBytes() can double as a
plain "select" whenever necessary.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=394
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This library class will enable driver modules (a) to query whether S3
support was enabled on the QEMU command line, (b) to produce fw_cfg DMA
operations that are to be replayed at S3 resume time.
Declare the library class in OvmfPkg/OvmfPkg.dec, and add the library
class header under OvmfPkg/Include/Library/. At the moment, the only API
we expose is QemuFwCfgS3Enabled(), which we'll first migrate from
QemuFwCfgLib. Further interfaces will be added in later patches.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=394
Suggested-by: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Dandan Bi
Laszlo Ersek