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发表于 2005-1-27 15:56:23| 字数 2,530| - LAN
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Controlling Multiple Fans in a Thermal Zone
The following is an example encoding of a thermal block with a thermal zone and a
single fan that has two cooling speeds. This is an example only.
- Scope(\_PR) {
- Processor(
- CPU0,
- 1, //unique number for this processor
- 0x110, //System IO address of Pblk Registers
- 0x06 //length in bytes of PBlk
- ) {}
- } //end of \_PR scope
- Scope(\_SB) {
- Device(EC0) {
- Name(_HID, EISAID("PNP0C09")) // ID for this EC
- // current resource description for this EC
- Name(_CRS, Buffer (){ 0x4B, 0x62, 0x00, 0x01, 0x4B,
- 0x66, 0x00, 0x01, 0x79, 0x00})
- Name(_GPE, 0) // GPE index for this EC
- // create EC's region and field for thermal support
- OperationRegion(EC0, EmbeddedControl, 0, 0xFF)
- // following is a method that the OS will schedule after it
- // receives an SCI and queries the EC to receive value 7
- Method(_Q07) {
- Notify (\_TZ.THM1, 0x80)
- }
- }
- }
- Scope(\_TZ) {
- // fan cooling mode high/off - engaged at AC0 temp
- PowerResource(FN10, 0, 0) {
- Method(_STA) { Return (THM1.FAN0) } // check power state
- Method(_ON) { Store (One, THM1.FAN0) }// turn on fan at high
- Method(_OFF) { Store (Zero, THM1.FAN0) }// turn off fan
- }
- // fan cooling mode low/off - engaged at AC1 temp
- PowerResource(FN11, 0, 0) {
- Method(_STA) { Return (THM1.FAN1) } // check power state
- Method(_ON) { Store (One, THM1.FAN1) }// turn on fan at low
- Method(_OFF) { Store (Zero, THM1.FAN1) }// turn off fan
- }
- // Following is a single fan with two speeds. This is represented
- // by creating two logical fan devices. When FN2 is turned on then
- // the fan is at a low speed. When FN1 and FN2 are both on then
- // the fan is on high.
- //
- // Create FAN device object FN1
- Device (FN1) {
- // Device ID for the FAN
- Name(_HID, EISAID("PNP0C0B"))
- Name(_PR0, Package(){FN10, FN11})
- }
- // Create FAN device object FN2
- Device (FN2) {
- // Device ID for the FAN
- Name(_HID, EISAID("PNP0C0B"))
- Name(_PR0, Package(){FN10})
- }
- // create a thermal zone
- ThermalZone (THM1) {
- // field used by this thermal zone
- Field(\EC0, AnyAcc, Lock, Preserve) {
- MODE, 1, // thermal policy (quiet/perform)
- FAN0, 1, // fan strength high/off
- FAN1, 1, // fan strength low/off
- , 5, // reserved
- TMP, 8, // current temp
- AC0, 8, // active cooling temp (high)
- AC1, 8, // active cooling temp (low)
- PSV, 8, // passive cooling temp
- CRT, 8, // critical temp
- }
- Method(_TMP) { Return (TMP )} // get current temp
- Method(_AC0) { Return (AC0) } // fan high temp
- Method(_AC1) { Return (AC1) } // fan low temp
- Name(_AL0, Package() {FN1, FN23}) // active cooling (high)
- Name(_AL1, Package() {FN2}) // active cooling (low)
- Method(_PSV) { Return (PSV) } // passive cooling temp
- Name(_PSL, Package() {\_PR.CPU0}) // cpu is pass cool dev
- Method(_CRT) { Return (CRT) } // get crit. temp
- Method(_SCP, 1) { Store (Arg1, MODE) }// set cooling mode
- Name(_TC1, 1) // bogus example constant
- Name(_TC2, 2) // bogus example constant
- Name(_TSP, 150) // sample every 15 seconds
- // END: declare objects for thermal zone
- }
- } // end of TZ
上面是一段风扇控制的ACPI描述语言代码，由BIOS提供，由OS执行。
[ Last edited by 茄子 on 2005-1-27 at 16:07 ] |
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