diff options
Diffstat (limited to 'src/northbridge/intel/haswell/acpi/ctdp.asl')
| -rw-r--r-- | src/northbridge/intel/haswell/acpi/ctdp.asl | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/src/northbridge/intel/haswell/acpi/ctdp.asl b/src/northbridge/intel/haswell/acpi/ctdp.asl new file mode 100644 index 0000000000..7e59fb52ef --- /dev/null +++ b/src/northbridge/intel/haswell/acpi/ctdp.asl @@ -0,0 +1,222 @@ +/* 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, DEFAULT_MCHBAR + 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) + { + If (\ISLP ()) { + /* Haswell ULT PL2 = 25W */ + Return (25 * 8) + } Else { + /* Haswell Mobile PL2 = 1.25 * PL1 */ + Return ((Arg0 * 125) / 100) + } + } + + /* 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) + } +//} |