diff options
Diffstat (limited to 'src/soc/intel/broadwell/acpi/cpu.asl')
-rw-r--r-- | src/soc/intel/broadwell/acpi/cpu.asl | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/acpi/cpu.asl b/src/soc/intel/broadwell/acpi/cpu.asl new file mode 100644 index 0000000000..f0da2dedd6 --- /dev/null +++ b/src/soc/intel/broadwell/acpi/cpu.asl @@ -0,0 +1,122 @@ +/* + * 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 + */ + +/* These devices are created at runtime */ +External (\_PR.CPU0, DeviceObj) +External (\_PR.CPU1, DeviceObj) +External (\_PR.CPU2, DeviceObj) +External (\_PR.CPU3, DeviceObj) +External (\_PR.CPU4, DeviceObj) +External (\_PR.CPU5, DeviceObj) +External (\_PR.CPU6, DeviceObj) +External (\_PR.CPU7, DeviceObj) + +/* Notify OS to re-read CPU tables, assuming ^2 CPU count */ +Method (PNOT) +{ + If (LGreaterEqual (\PCNT, 2)) { + Notify (\_PR.CPU0, 0x81) // _CST + Notify (\_PR.CPU1, 0x81) // _CST + } + If (LGreaterEqual (\PCNT, 4)) { + Notify (\_PR.CPU2, 0x81) // _CST + Notify (\_PR.CPU3, 0x81) // _CST + } + If (LGreaterEqual (\PCNT, 8)) { + Notify (\_PR.CPU4, 0x81) // _CST + Notify (\_PR.CPU5, 0x81) // _CST + Notify (\_PR.CPU6, 0x81) // _CST + Notify (\_PR.CPU7, 0x81) // _CST + } +} + +/* Notify OS to re-read CPU _PPC limit, assuming ^2 CPU count */ +Method (PPCN) +{ + If (LGreaterEqual (\PCNT, 2)) { + Notify (\_PR.CPU0, 0x80) // _PPC + Notify (\_PR.CPU1, 0x80) // _PPC + } + If (LGreaterEqual (\PCNT, 4)) { + Notify (\_PR.CPU2, 0x80) // _PPC + Notify (\_PR.CPU3, 0x80) // _PPC + } + If (LGreaterEqual (\PCNT, 8)) { + Notify (\_PR.CPU4, 0x80) // _PPC + Notify (\_PR.CPU5, 0x80) // _PPC + Notify (\_PR.CPU6, 0x80) // _PPC + Notify (\_PR.CPU7, 0x80) // _PPC + } +} + +/* Notify OS to re-read Throttle Limit tables, assuming ^2 CPU count */ +Method (TNOT) +{ + If (LGreaterEqual (\PCNT, 2)) { + Notify (\_PR.CPU0, 0x82) // _TPC + Notify (\_PR.CPU1, 0x82) // _TPC + } + If (LGreaterEqual (\PCNT, 4)) { + Notify (\_PR.CPU2, 0x82) // _TPC + Notify (\_PR.CPU3, 0x82) // _TPC + } + If (LGreaterEqual (\PCNT, 8)) { + Notify (\_PR.CPU4, 0x82) // _TPC + Notify (\_PR.CPU5, 0x82) // _TPC + Notify (\_PR.CPU6, 0x82) // _TPC + Notify (\_PR.CPU7, 0x82) // _TPC + } +} + +/* Return a package containing enabled processor entries */ +Method (PPKG) +{ + If (LGreaterEqual (\PCNT, 8)) { + Return (Package() + { + \_PR.CPU0, + \_PR.CPU1, + \_PR.CPU2, + \_PR.CPU3, + \_PR.CPU4, + \_PR.CPU5, + \_PR.CPU6, + \_PR.CPU7 + }) + } ElseIf (LGreaterEqual (\PCNT, 4)) { + Return (Package () + { + \_PR.CPU0, + \_PR.CPU1, + \_PR.CPU2, + \_PR.CPU3 + }) + } ElseIf (LGreaterEqual (\PCNT, 2)) { + Return (Package () + { + \_PR.CPU0, + \_PR.CPU1 + }) + } Else { + Return (Package () + { + \_PR.CPU0 + }) + } +} |