Программное "охлаждение" процессоров AMD Athlon/Duron под Linux. (amd cpu kernel linux patch idle hardware)
Ключевые слова: amd, cpu, kernel, linux, patch, idle, hardware, (найти похожие документы)
From: Daniel Nofftz <nofftz@castor.uni-trier.de>
Newsgroups: mlist.linux.kernel
Subject: Программное "охлаждение" процессоров AMD Athlon/Duron под Linux.
Патчи подходят для процессоров AMD Athlon/Duron/AthlonXP,
Поддерживаемые чипсеты: VIA kt133/kx133/kt133a, kt266/kt266a
Athlon-Powersaving-HOWTO:
http://cip.uni-trier.de/nofftz/linux/Athlon-Powersaving-HOWTO.html
Страница автора патча:
http://cip.uni-trier.de/nofftz/linux/
Утилита для user-level охлаждения (Via KT133 и KX133 (VT8363 и VT8371/VT82C686x)):
http://mpet.freeservers.com/LVCool.html
Для работы патча необходимо активировать ACPI при сборке ядра.
cd /usr/src/
cat amd_cool.diff | patch -p0
cd linux
make menuconfig
В "general.setup" активируем "acpi subsystem", "acpi bus" и "acpi Processor entry"
(Внимание, при включенном ACPI не будет работать APM).
В lilo.conf пропишите: append=" amd_disconnect=yes".
Можно обойтись без патча, переключая режимы acpi при помощи утилиты setpci.
Для этого необходимо включить ACPI в ядре, как было описано выше.
Для kt133/133a и kx133:
Включить "охлаждение": setpci -v -H1 -s 0:0.0 52=EB
Выключить: setpci -v -H1 -s 0:0.0 52=6B
Для kt266/266a:
Включить: setpci -v -H1 -s 0:0.0 92=EB
Выключить: setpci -v -H1 -s 0:0.0 92=6B
Две версии патча (для linux ядра 2.4.17):
amd_cool.diff
--- linux-2.4.17-orig/drivers/pci/quirks.c Sun Nov 11 19:09:33 2001
+++ linux/drivers/pci/quirks.c Tue Jan 22 16:50:05 2002
@@ -21,6 +21,23 @@
#undef DEBUG
+/* Power Saving for Athlon/Duron CPUs on Via Chipsets has to be enabled by
+ * kernel-boot-option "amd_disconnect=yes" . This is cause it looks like
+ * there are some stability problems on some boards when this option is
+ * enabled.
+ */
+
+int enable_amd_disconnect;
+
+static int __init amd_disconnect_setup (char *str) {
+ if(!strncmp(str,"yes",3)) {
+ enable_amd_disconnect=1;
+ }
+ return 1;
+}
+
+__setup("amd_disconnect=", amd_disconnect_setup);
+
/* Deal with broken BIOS'es that neglect to enable passive release,
which can cause problems in combination with the 82441FX/PPro MTRRs */
static void __init quirk_passive_release(struct pci_dev *dev)
@@ -146,6 +163,47 @@
printk(KERN_INFO "Applying VIA southbridge workaround.\n");
}
+/* Power Saving for Athlon/Duron/AthonXP CPUs on Via Chipsets.
+ * Found in the net and modified for supporting KT266/KT266A chipsets
+ * by Daniel Nofftz <nofftz@castor.uni-trier.de>
+ * This Funktion must be enabled by kernel booting option "via_disconnect=yes"!
+ */
+
+static void __init quirk_amddisconnect(struct pci_dev *dev)
+{
+ u16 did;
+ u32 res32;
+
+ if(!enable_amd_disconnect) return;
+
+ pci_read_config_word(dev,PCI_DEVICE_ID,&did);
+
+
+ if(did==PCI_DEVICE_ID_VIA_8367_0)
+ {
+ pci_read_config_dword(dev,0x92&0xfc,&res32);
+ if ((res32&0x00800000)==0)
+ {
+ printk(KERN_INFO "Enabling disconnect in VIA northbridge: KT266/266A chipset found.\n");
+ res32|=0x00800000;
+ pci_write_config_dword(dev,0x92&0xfc,res32);
+ } else
+ printk(KERN_INFO "Disconnect already anabled in VIA northbridge.\n");
+
+ }
+ else if((did==PCI_DEVICE_ID_VIA_8363_0)||(did==PCI_DEVICE_ID_VIA_8371_0))
+ {
+ pci_read_config_dword(dev,0x52&0xfc,&res32);
+ if ((res32&0x00800000)==0)
+ {
+ printk(KERN_INFO "Enabling disconnect in VIA northbridge: KT133/KX133 chipset found\n");
+ res32|=0x00800000;
+ pci_write_config_dword(dev,0x52&0xfc,res32);
+ } else
+ printk(KERN_INFO "Disconnect already anabled in VIA northbridge.\n");
+
+ }
+}
/*
* VIA Apollo VP3 needs ETBF on BT848/878
*/
@@ -485,6 +543,9 @@
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, 0x3112 /* Not out yet ? */, quirk_vialatency },
+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, quirk_amddisconnect },
+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_amddisconnect },
+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_0, quirk_amddisconnect },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576, quirk_vsfx },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_viaetbf },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id },
amd_cool_new.diff
--- linux-2.4.17-orig/drivers/pci/quirks.c Sun Nov 11 19:09:33 2001
+++ linux/drivers/pci/quirks.c Wed Jan 30 09:57:20 2002
@@ -18,9 +18,36 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
+#include <asm/msr.h>
#undef DEBUG
+/* Power Saving for Athlon/Duron CPUs on Via Chipsets has to be enabled by
+ * kernel-boot-option "amd_disconnect=yes" . This is cause it looks like
+ * there are some stability problems on some boards when this option is
+ * enabled.
+ */
+
+int enable_amd_disconnect = 0;
+int force_amd_clk = 0;
+
+
+static int __init force_amd_clk_setup (char *str) {
+ if(!strncmp(str,"yes",3)) {
+ force_amd_clk=1;
+ }
+ return 1;
+}
+static int __init amd_disconnect_setup (char *str) {
+ if(!strncmp(str,"yes",3)) {
+ enable_amd_disconnect=1;
+ }
+ return 1;
+}
+
+__setup("amd_disconnect=", amd_disconnect_setup);
+__setup("force_amd_clk=", force_amd_clk_setup);
+
/* Deal with broken BIOS'es that neglect to enable passive release,
which can cause problems in combination with the 82441FX/PPro MTRRs */
static void __init quirk_passive_release(struct pci_dev *dev)
@@ -146,6 +173,58 @@
printk(KERN_INFO "Applying VIA southbridge workaround.\n");
}
+/* Power Saving for Athlon/Duron/AthonXP CPUs on Via Chipsets.
+ * Found in the net and modified for supporting KT266/KT266A chipsets
+ * by Daniel Nofftz <nofftz@castor.uni-trier.de>
+ * This Funktion must be enabled by kernel booting option "via_disconnect=yes"!
+ */
+
+static void __init quirk_amddisconnect(struct pci_dev *dev)
+{
+ u16 did;
+ u32 res32;
+ u32 eins, zwei;
+
+ if(!enable_amd_disconnect) return;
+
+ pci_read_config_word(dev,PCI_DEVICE_ID,&did);
+
+ rdmsr(0xc001001b , eins, zwei);
+
+ printk(KERN_INFO "Athlon/Duron CLK_Ctrl Value found : %x\n", eins);
+ if(force_amd_clk)
+ {
+ wrmsr(0xc001001b, 0xfff0d22f, 0xd22f);
+ rdmsr(0xc001001b , eins, zwei);
+
+ printk(KERN_INFO "Athlon/Duron CLK_Ctrl Value set to : %x\n", eins);
+
+ }
+ if(did==PCI_DEVICE_ID_VIA_8367_0)
+ {
+ pci_read_config_dword(dev,0x92&0xfc,&res32);
+ if ((res32&0x00800000)==0)
+ {
+ printk(KERN_INFO "Enabling disconnect in VIA northbridge: KT266/266A chipset found.\n");
+ res32|=0x00800000;
+ pci_write_config_dword(dev,0x92&0xfc,res32);
+ } else
+ printk(KERN_INFO "Disconnect already anabled in VIA northbridge.\n");
+
+ }
+ else if((did==PCI_DEVICE_ID_VIA_8363_0)||(did==PCI_DEVICE_ID_VIA_8371_0))
+ {
+ pci_read_config_dword(dev,0x52&0xfc,&res32);
+ if ((res32&0x00800000)==0)
+ {
+ printk(KERN_INFO "Enabling disconnect in VIA northbridge: KT133/KX133 chipset found\n");
+ res32|=0x00800000;
+ pci_write_config_dword(dev,0x52&0xfc,res32);
+ } else
+ printk(KERN_INFO "Disconnect already anabled in VIA northbridge.\n");
+
+ }
+}
/*
* VIA Apollo VP3 needs ETBF on BT848/878
*/
@@ -485,6 +564,9 @@
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, 0x3112 /* Not out yet ? */, quirk_vialatency },
+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8367_0, quirk_amddisconnect },
+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_amddisconnect },
+ { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_0, quirk_amddisconnect },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C576, quirk_vsfx },
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_viaetbf },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C597_0, quirk_vt82c598_id },
