033bb4bc8d
The existing code generated invalid ACPI processor objects if the core number was greater than 9. The first invalid object instance was autocorrected by Linux, but subsequent instances conflicted with each other, leading to a failure to boot if more than 10 CPU cores were installed. The modified code will function with up to 99 cores. Change-Id: I62dc0eb61ae2e2b7f7dcf30e9c7de09cd901a81c Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> Reviewed-on: http://review.coreboot.org/8422 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Marc Jones <marc.jones@se-eng.com>
78 lines
2.1 KiB
Plaintext
78 lines
2.1 KiB
Plaintext
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2011 Google Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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/* These devices are created at runtime */
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External (\_PR.CP00, DeviceObj)
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External (\_PR.CP01, DeviceObj)
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External (\_PR.CP02, DeviceObj)
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External (\_PR.CP03, DeviceObj)
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/* Notify OS to re-read CPU tables, assuming ^2 CPU count */
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Method (PNOT)
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{
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If (LGreaterEqual (\PCNT, 2)) {
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Notify (\_PR.CP00, 0x81) // _CST
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Notify (\_PR.CP01, 0x81) // _CST
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}
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If (LGreaterEqual (\PCNT, 4)) {
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Notify (\_PR.CP02, 0x81) // _CST
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Notify (\_PR.CP03, 0x81) // _CST
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}
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}
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/* Notify OS to re-read CPU _PPC limit, assuming ^2 CPU count */
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Method (PPCN)
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{
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If (LGreaterEqual (\PCNT, 2)) {
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Notify (\_PR.CP00, 0x80) // _PPC
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Notify (\_PR.CP01, 0x80) // _PPC
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}
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If (LGreaterEqual (\PCNT, 4)) {
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Notify (\_PR.CP02, 0x80) // _PPC
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Notify (\_PR.CP03, 0x80) // _PPC
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}
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}
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/* Notify OS to re-read Throttle Limit tables, assuming ^2 CPU count */
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Method (TNOT)
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{
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If (LGreaterEqual (\PCNT, 2)) {
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Notify (\_PR.CP00, 0x82) // _TPC
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Notify (\_PR.CP01, 0x82) // _TPC
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}
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If (LGreaterEqual (\PCNT, 4)) {
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Notify (\_PR.CP02, 0x82) // _TPC
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Notify (\_PR.CP03, 0x82) // _TPC
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}
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}
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/* Return a package containing enabled processor entries */
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Method (PPKG)
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{
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If (LGreaterEqual (\PCNT, 4)) {
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Return (Package() {\_PR.CP00, \_PR.CP01, \_PR.CP02, \_PR.CP03})
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} ElseIf (LGreaterEqual (\PCNT, 2)) {
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Return (Package() {\_PR.CP00, \_PR.CP01})
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} Else {
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Return (Package() {\_PR.CP00})
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}
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}
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