Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
3. The IDE driver will call the _STM control method passing in transfer timing settings for the
channel, as well as the ATA drive ID block for each drive on the channel. The _STM control
method will configure the IDE channel based on this information.
4. For each drive on the IDE channel, the IDE driver will run the _GTF to determine the ATA
commands required to reinitialize each drive to boot up defaults.
5. The IDE driver will finish initializing the drives by sending these ATA commands to the drives,
possibly modifying or adding commands to suit the features supported by the operating system.
The following shows the namespace for these objects:
\_SB
// System bus
PCI0
// PCI bus
IDE1
// First IDE channel
_ADR
// Indicates address of the channel on the PCI bus
_GTM
// Control method to get current IDE channel settings
_STM
// Control method to set current IDE channel settings
_PR0
// Power resources needed for D0 power state
DRV1 // Drive 0
_ADR
// Indicates address of master IDE device
_GTF
// Control method to get task file
DRV2 // Drive 1
_ _ADR // Indicates address of slave IDE device
_ _GTF // Control method to get task file
IDE2
// Second IDE channel
_ADR
// Indicates address of the channel on the PCI bus
_GTM
// Control method to get current IDE channel settings
_STM
// Control method to set current IDE channel settings
_PR0
// Power resources needed for D0 power state
DRV1 // Drive 0
_ADR
// Indicates address of master IDE device
_GTF
// Control method to get task file
DRV2 // Drive 1
_ADR
// Indicates address of slave IDE device
_GTF
// Control method to get task file
The sequential order of operations is as follows:
Powering down:
• Call _GTM.
• Power down drive (calls _PS3 method and turns off power planes).
Powering up:
• Power up drive (calls _PS0 method if present and turns on power planes).
• Call _STM passing info from _GTM (possibly modified), with ID data from
• each drive.
• Initialize the channel.
• May modify the results of _GTF.
• For each drive:
— Call _GTF.
— Execute task file (possibly modified).
510 April, 2015 Version 6.0