diff options
Diffstat (limited to 'src/soc/intel/skylake/acpi/ctdp.asl')
| -rw-r--r-- | src/soc/intel/skylake/acpi/ctdp.asl | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/acpi/ctdp.asl b/src/soc/intel/skylake/acpi/ctdp.asl new file mode 100644 index 0000000000..a2a8fb4d2c --- /dev/null +++ b/src/soc/intel/skylake/acpi/ctdp.asl @@ -0,0 +1,237 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +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, + Add (MCH_BASE_ADDRESS, 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 (\_PR.CP00._PSS) + Method (PSSS, 1, NotSerialized) + { + Store (One, Local0) /* Start at P1 */ + Store (SizeOf (\_PR.CP00._PSS), Local1) + + While (LLess (Local0, Local1)) { + /* Store _PSS entry Control value to Local2 */ + ShiftRight (DeRefOf (Index (DeRefOf (Index + (\_PR.CP00._PSS, Local0)), 4)), 8, Local2) + If (LEqual (Local2, Arg0)) { + Return (Subtract (Local0, 1)) + } + Increment (Local0) + } + + Return (0) + } + + /* Calculate PL2 based on chip type */ + Method (CPL2, 1, NotSerialized) + { + /* Haswell ULT PL2 = 25W */ + /* FIXME: update for broadwell */ + Return (Multiply (25, 8)) + } + + /* Set Config TDP Down */ + Method (STND, 0, Serialized) + { + If (Acquire (CTCM, 100)) { + Return (0) + } + If (LEqual (CTCD, CTCC)) { + Release (CTCM) + Return (0) + } + + Store ("Set TDP Down", Debug) + + /* Set CTC */ + Store (CTCD, CTCS) + + /* Set TAR */ + Store (TARD, TARS) + + /* Set PPC limit and notify OS */ + Store (PSSS (TARD), PPCM) + PPCN () + + /* Set PL2 */ + Store (CPL2 (CTDD), PL2V) + + /* Set PL1 */ + Store (CTDD, PL1V) + + /* Store the new TDP Down setting */ + Store (CTCD, CTCC) + + Release (CTCM) + Return (1) + } + + /* Set Config TDP Nominal from Down */ + Method (STDN, 0, Serialized) + { + If (Acquire (CTCM, 100)) { + Return (0) + } + If (LEqual (CTCN, CTCC)) { + Release (CTCM) + Return (0) + } + + Store ("Set TDP Nominal", Debug) + + /* Set PL1 */ + Store (CTDN, PL1V) + + /* Set PL2 */ + Store (CPL2 (CTDN), PL2V) + + /* Set PPC limit and notify OS */ + Store (PSSS (TARN), PPCM) + PPCN () + + /* Set TAR */ + Store (TARN, TARS) + + /* Set CTC */ + Store (CTCN, CTCS) + + /* Store the new TDP Nominal setting */ + Store (CTCN, CTCC) + + Release (CTCM) + Return (1) + } + + /* Calculate PL1 value based on requested TDP */ + Method (TDPP, 1, NotSerialized) + { + Return (Multiply (ShiftLeft (Subtract (PUNI, 1), 2), Arg0)) + } + + /* Enable Controllable TDP to limit PL1 to requested value */ + Method (CTLE, 1, Serialized) + { + If (Acquire (CTCM, 100)) { + Return (0) + } + + Store ("Enable PL1 Limit", Debug) + + /* Set _PPC to LFM */ + Store (PSSS (LFM_), Local0) + Add (Local0, 1, PPCM) + \PPCN () + + /* Set TAR to LFM-1 */ + Subtract (LFM_, 1, TARS) + + /* Set PL1 to desired value */ + Store (PL1V, SPL1) + Store (TDPP (Arg0), PL1V) + + /* Set PL1 CLAMP bit */ + Store (One, PL1C) + + Release (CTCM) + Return (1) + } + + /* Disable Controllable TDP */ + Method (CTLD, 0, Serialized) + { + If (Acquire (CTCM, 100)) { + Return (0) + } + + Store ("Disable PL1 Limit", Debug) + + /* Clear PL1 CLAMP bit */ + Store (Zero, PL1C) + + /* Set PL1 to normal value */ + Store (SPL1, PL1V) + + /* Set TAR to 0 */ + Store (Zero, TARS) + + /* Set _PPC to 0 */ + Store (Zero, PPCM) + \PPCN () + + Release (CTCM) + Return (1) + } +} |