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- /*++
- Copyright (c) 1999 - 2014, Intel Corporation. All rights reserved
- SPDX-License-Identifier: BSD-2-Clause-Patent
- Module Name:
- IgdOSBCB.ASL
- Abstract:
- IGD OpRegion/Software SCI Reference Code for the Baytrail Family.
- This file contains the system BIOS call back functionality for the
- OpRegion/Software SCI mechanism.
- --*/
- Method (SBCB, 0, Serialized)
- {
- // Supported Callbacks: Sub-function 0
- If (LEqual(GESF, 0x0))
- {
- //<TODO> An OEM may support the driver->SBIOS status callbacks, but
- // the supported callbacks value must be modified. The code that is
- // executed upon reception of the callbacks must be also be updated
- // to perform the desired functionality.
- Store(0x00000000, PARM) // No callbacks supported
- If(LEqual(PFLV,FMBL))
- {
- Store(0x000F87FD, PARM) // Mobile
- }
- If(LEqual(PFLV,FDTP))
- {
- Store(0x000F87BD, PARM) // Desktop
- }
- Store(Zero, GESF) // Clear the exit parameter
- Return(SUCC) // "Success"
- }
- // BIOS POST Completion: Sub-function 1
- If (LEqual(GESF, 1))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Pre-Hires Set Mode: Sub-function 3
- If (LEqual(GESF, 3))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Post-Hires Set Mode: Sub-function 4
- If (LEqual(GESF, 4))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Display Switch: Sub-function 5
- If (LEqual(GESF, 5))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Set TV format: Sub-function 6
- If (LEqual(GESF, 6))
- {
- //<TODO> If implemented, the input values must be saved into
- // non-volatile storage for parsing during the next boot. The
- // following Sample code is Intel validated implementation.
- Store(And(PARM, 0x0F), ITVF)
- Store(ShiftRight(And(PARM, 0xF0), 4), ITVM)
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC)
- }
- // Adapter Power State: Sub-function 7
- If (LEqual(GESF, 7))
- {
- // Upon notification from driver that the Adapter Power State = D0,
- // check if previous lid event failed. If it did, retry the lid
- // event here.
- If(LEqual(PARM, 0))
- {
- Store(CLID, Local0)
- If(And(0x80000000,Local0))
- {
- And(CLID, 0x0000000F, CLID)
- GLID(CLID)
- }
- }
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Display Power State: Sub-function 8
- If (LEqual(GESF, 8))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Set Boot Display: Sub-function 9
- If (LEqual(GESF, 9))
- {
- //<TODO> An OEM may elect to implement this method. In that case,
- // the input values must be saved into non-volatile storage for
- // parsing during the next boot. The following Sample code is Intel
- // validated implementation.
- And(PARM, 0xFF, IBTT) // Save the boot display to NVS
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Reserved, "Critical failure"
- }
- // Set Panel Details: Sub-function 10 (0Ah)
- If (LEqual(GESF, 10))
- {
- //<TODO> An OEM may elect to implement this method. In that case,
- // the input values must be saved into non-volatile storage for
- // parsing during the next boot. The following Sample code is Intel
- // validated implementation.
- // Set the panel-related NVRAM variables based the input from the driver.
- And(PARM, 0xFF, IPSC)
- // Change panel type if a change is requested by the driver (Change if
- // panel type input is non-zero). Zero=No change requested.
- If(And(ShiftRight(PARM, 8), 0xFF))
- {
- And(ShiftRight(PARM, 8), 0xFF, IPAT)
- Decrement(IPAT) // 0 = no change, so fit to CMOS map
- }
- And(ShiftRight(PARM, 18), 0x3, IBLC)
- And(ShiftRight(PARM, 20), 0x7, IBIA)
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Success
- }
- // Set Internal Graphics: Sub-function 11 (0Bh)
- If (LEqual(GESF, 11))
- {
- //<TODO> An OEM may elect to implement this method. In that case,
- // the input values must be saved into non-volatile storage for
- // parsing during the next boot. The following Sample code is Intel
- // validated implementation.
- And(ShiftRight(PARM, 1), 1, IF1E) // Program the function 1 option
- // Fixed memory/DVMT memory
- And(ShiftRight(PARM, 17), 0xF, IDMS) // Program DVMT/fixed memory size
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Success
- }
- // Post-Hires to DOS FS: Sub-function 16 (10h)
- If (LEqual(GESF, 16))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // APM Complete: Sub-function 17 (11h)
- If (LEqual(GESF, 17))
- {
- Store(ShiftLeft(LIDS, 8), PARM) // Report the lid state
- Add(PARM, 0x100, PARM) // Adjust the lid state, 0 = Unknown
- Store(Zero, GESF) // Clear the exit parameter
- Return(SUCC) // Not supported, but no failure
- }
- // Set Spread Spectrum Clocks: Sub-function 18 (12h)
- If (LEqual(GESF, 18))
- {
- //<TODO> An OEM may elect to implement this method. In that case,
- // the input values must be saved into non-volatile storage for
- // parsing during the next boot. The following Sample code is Intel
- // validated implementation.
- If(And(PARM, 1))
- {
- If(LEqual(ShiftRight(PARM, 1), 1))
- {
- Store(1, ISSC) // Enable HW SSC, only for clock 1
- }
- Else
- {
- Store(Zero, GESF)
- Return(CRIT) // Failure, as the SSC clock must be 1
- }
- }
- Else
- {
- Store(0, ISSC) // Disable SSC
- }
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Success
- }
- // Post VBE/PM Callback: Sub-function 19 (13h)
- If (LEqual(GESF, 19))
- {
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Not supported, but no failure
- }
- // Set PAVP Data: Sub-function 20 (14h)
- If (LEqual(GESF, 20))
- {
- And(PARM, 0xF, PAVP) // Store PAVP info
- Store(Zero, GESF) // Clear the exit parameter
- Store(Zero, PARM)
- Return(SUCC) // Success
- }
- // A call to a reserved "System BIOS callbacks" function was received
- Store(Zero, GESF) // Clear the exit parameter
- Return(SUCC) // Reserved, "Critical failure"
- }
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