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/* SPDX-License-Identifier: GPL-2.0-only */
Scope (\_SB.PCI0.MCHC)
{
Mutex (CTCM, 1) /* CTDP Switch Mutex (sync level 1) */
Name (CTCC, 0) /* CTDP Current Selection */
Name (CTCN, 0) /* CTDP Nominal Select */
Name (CTCD, 1) /* CTDP Down Select */
Name (CTCU, 2) /* CTDP Up Select */
Name (SPL1, 0) /* Saved PL1 value */
OperationRegion (MCHB, SystemMemory, CONFIG_FIXED_MCHBAR_MMIO_BASE + 0x5000, 0x1000)
Field (MCHB, DWordAcc, Lock, Preserve)
{
Offset (0x930), /* PACKAGE_POWER_SKU */
CTDN, 15, /* CTDP Nominal PL1 */
Offset (0x938), /* PACKAGE_POWER_SKU_UNIT */
PUNI, 4, /* Power Units */
, 4,
EUNI, 5, /* Energy Units */
, 3,
TUNI, 4, /* Time Units */
Offset (0x958), /* PLATFORM_INFO */
, 40,
LFM_, 8, /* Maximum Efficiency Ratio (LFM) */
Offset (0x9a0), /* TURBO_POWER_LIMIT1 */
PL1V, 15, /* Power Limit 1 Value */
PL1E, 1, /* Power Limit 1 Enable */
PL1C, 1, /* Power Limit 1 Clamp */
PL1T, 7, /* Power Limit 1 Time */
Offset (0x9a4), /* TURBO_POWER_LIMIT2 */
PL2V, 15, /* Power Limit 2 Value */
PL2E, 1, /* Power Limit 2 Enable */
PL2C, 1, /* Power Limit 2 Clamp */
PL2T, 7, /* Power Limit 2 Time */
Offset (0xf3c), /* CONFIG_TDP_NOMINAL */
TARN, 8, /* CTDP Nominal Turbo Activation Ratio */
Offset (0xf40), /* CONFIG_TDP_LEVEL1 */
CTDD, 15, /* CTDP Down PL1 */
, 1,
TARD, 8, /* CTDP Down Turbo Activation Ratio */
Offset (0xf48), /* MSR_CONFIG_TDP_LEVEL2 */
CTDU, 15, /* CTDP Up PL1 */
, 1,
TARU, 8, /* CTDP Up Turbo Activation Ratio */
Offset (0xf50), /* CONFIG_TDP_CONTROL */
CTCS, 2, /* CTDP Select */
Offset (0xf54), /* TURBO_ACTIVATION_RATIO */
TARS, 8, /* Turbo Activation Ratio Select */
}
/*
* Search CPU0 _PSS looking for control = arg0 and then
* return previous P-state entry number for new _PPC
*
* Format of _PSS:
* Name (_PSS, Package () {
* Package (6) { freq, power, tlat, blat, control, status }
* }
*/
External (\_SB.CP00._PSS)
Method (PSSS, 1, NotSerialized)
{
Local0 = 1 /* Start at P1 */
Local1 = SizeOf (\_SB.CP00._PSS)
While (Local0 < Local1) {
/* Store _PSS entry Control value to Local2 */
Local2 = DeRefOf (Index (DeRefOf (Index (\_SB.CP00._PSS, Local0)), 4)) >> 8
If (Local2 == Arg0) {
Return (Local0 - 1)
}
Local0++
}
Return (0)
}
/* Calculate PL2 based on chip type */
Method (CPL2, 1, NotSerialized)
{
/* Haswell ULT PL2 = 25W */
/* FIXME: update for broadwell */
Return (25 * 8)
}
/* Set Config TDP Down */
Method (STND, 0, Serialized)
{
If (Acquire (CTCM, 100)) {
Return (0)
}
If (CTCD == CTCC) {
Release (CTCM)
Return (0)
}
Debug = "Set TDP Down"
/* Set CTC */
CTCS = CTCD
/* Set TAR */
TARS = TARD
/* Set PPC limit and notify OS */
PPCM = PSSS (TARD)
PPCN ()
/* Set PL2 */
PL2V = CPL2 (CTDD)
/* Set PL1 */
PL1V = CTDD
/* Store the new TDP Down setting */
CTCC = CTCD
Release (CTCM)
Return (1)
}
/* Set Config TDP Nominal from Down */
Method (STDN, 0, Serialized)
{
If (Acquire (CTCM, 100)) {
Return (0)
}
If (CTCN == CTCC) {
Release (CTCM)
Return (0)
}
Debug = "Set TDP Nominal"
/* Set PL1 */
PL1V = CTDN
/* Set PL2 */
PL2V = CPL2 (CTDN)
/* Set PPC limit and notify OS */
PPCM = PSSS (TARN)
PPCN ()
/* Set TAR */
TARS = TARN
/* Set CTC */
CTCS = CTCN
/* Store the new TDP Nominal setting */
CTCC = CTCN
Release (CTCM)
Return (1)
}
/* Calculate PL1 value based on requested TDP */
Method (TDPP, 1, NotSerialized)
{
Return (((PUNI - 1) << 2) * Arg0)
}
/* Enable Controllable TDP to limit PL1 to requested value */
Method (CTLE, 1, Serialized)
{
If (Acquire (CTCM, 100)) {
Return (0)
}
Debug = "Enable PL1 Limit"
/* Set _PPC to LFM */
Local0 = PSSS (LFM_)
PPCM = Local0 + 1
\PPCN ()
/* Set TAR to LFM-1 */
TARS = LFM_ - 1
/* Set PL1 to desired value */
SPL1 = PL1V
PL1V = TDPP (Arg0)
/* Set PL1 CLAMP bit */
PL1C = 1
Release (CTCM)
Return (1)
}
/* Disable Controllable TDP */
Method (CTLD, 0, Serialized)
{
If (Acquire (CTCM, 100)) {
Return (0)
}
Debug = "Disable PL1 Limit"
/* Clear PL1 CLAMP bit */
PL1C = 0
/* Set PL1 to normal value */
PL1V = SPL1
/* Set TAR to 0 */
TARS = 0
/* Set _PPC to 0 */
PPCM = 0
\PPCN ()
Release (CTCM)
Return (1)
}
}
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