06a265b948
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>