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991528d734
linux/drivers/acpi
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Venkatesh Pallipadi 991528d734 ACPI: Processor native C-states using MWAIT 
Intel processors starting with the Core Duo support
support processor native C-state using the MWAIT instruction.
Refer: Intel Architecture Software Developer's Manual
http://www.intel.com/design/Pentium4/manuals/253668.htm

Platform firmware exports the support for Native C-state to OS using
ACPI _PDC and _CST methods.
Refer: Intel Processor Vendor-Specific ACPI: Interface Specification
http://www.intel.com/technology/iapc/acpi/downloads/302223.htm

With Processor Native C-state, we use 'MWAIT' instruction on the processor
to enter different C-states (C1, C2, C3).  We won't use the special IO
ports to enter C-state and no SMM mode etc required to enter C-state.
Overall this will mean better C-state support.

One major advantage of using MWAIT for all C-states is, with this and
"treat interrupt as break event" feature of MWAIT, we can now get accurate
timing for the time spent in C1, C2, ..  states.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-10-14 00:35:39 -04:00
..
dispatcher ACPI: ACPICA 20060707 2006-07-09 15:15:40 -04:00
events ACPI: ACPICA 20060707 2006-07-09 15:15:40 -04:00
executer Pull acpica-20060707 into test branch 2006-07-10 02:39:41 -04:00
hardware ACPI: Allow setting SCI_EN bit in PM1_CONTROL register 2006-10-10 17:14:44 -07:00
namespace ACPI: ACPICA 20060707 2006-07-09 15:15:40 -04:00
parser ACPI: acpi_os_allocate() fixes 2006-07-10 02:37:22 -04:00
resources ACPI: ACPICA 20060526 2006-06-14 02:44:35 -04:00
sleep ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
tables ACPI: ACPICA 20060707 2006-07-09 15:15:40 -04:00
utilities Pull acpi_os_allocate into test branch 2006-07-10 02:39:47 -04:00
ac.c ACPI: fix boot with acpi=off 2006-08-15 23:16:43 -04:00
acpi_memhotplug.c [PATCH] hot-add-mem x86_64: memory_add_physaddr_to_nid node fixup 2006-10-01 00:39:18 -07:00
asus_acpi.c ACPI: asus_acpi: correct M6N/M6R display nodes 2006-07-01 16:20:10 -04:00
battery.c ACPI: fix boot with acpi=off 2006-08-15 23:16:43 -04:00
blacklist.c [PATCH] x86_64: Clean up and tweak ACPI blacklist year code 2006-03-25 09:10:54 -08:00
bus.c ACPI: add message if firmware_register() init fails 2006-08-15 23:27:38 -04:00
button.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
cm_sbs.c [PATCH] acpi NULL noise removal 2006-10-10 15:37:22 -07:00
container.c ACPI: delete acpi_os_free(), use kfree() directly 2006-06-30 03:19:10 -04:00
debug.c ACPI: delete tracing macros from drivers/acpi/*.c 2006-06-27 00:41:40 -04:00
dock.c PCI: docking station: remove dock uevents 2006-08-03 13:20:06 -07:00
ec.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
event.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
fan.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
glue.c ACPI: delete acpi_os_free(), use kfree() directly 2006-06-30 03:19:10 -04:00
hotkey.c ACPI: hotkey.c fixes, fix for potential crash of hotkey.c 2006-08-16 18:08:06 -04:00
i2c_ec.c i2c: Constify i2c_algorithm declarations, part 2 2006-09-26 15:38:52 -07:00
i2c_ec.h ACPI: add support for Smart Battery 2006-07-01 16:36:14 -04:00
ibm_acpi.c ACPI: Allow a WAN module enable/disable on a Thinkpad X60. 2006-06-01 20:42:32 -04:00
Kconfig fix drivers/acpi/Kconfig typos 2006-10-03 22:24:43 +02:00
Makefile Revert "Revert "ACPI: dock driver"" 2006-07-09 17:22:28 -04:00
motherboard.c ACPI: delete tracing macros from drivers/acpi/*.c 2006-06-27 00:41:40 -04:00
numa.c ACPI: remove function tracing macros from drivers/acpi/*.c 2006-07-01 16:48:23 -04:00
osl.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
pci_bind.c ACPI: delete tracing macros from drivers/acpi/*.c 2006-06-27 00:41:40 -04:00
pci_irq.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2006-06-30 15:39:30 -07:00
pci_link.c ACPI: acpi_os_allocate() fixes 2006-07-10 02:37:22 -04:00
pci_root.c ACPI: pci_root: Remove unneeded acpi_handle from driver. 2006-06-30 02:51:34 -04:00
power.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
processor_core.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
processor_idle.c ACPI: Processor native C-states using MWAIT 2006-10-14 00:35:39 -04:00
processor_perflib.c ACPI: delete acpi_os_free(), use kfree() directly 2006-06-30 03:19:10 -04:00
processor_thermal.c ACPI: delete tracing macros from drivers/acpi/*.c 2006-06-27 00:41:40 -04:00
processor_throttling.c ACPI: delete tracing macros from drivers/acpi/*.c 2006-06-27 00:41:40 -04:00
sbs.c ACPI: skip smart battery init when acpi=off 2006-08-15 23:21:37 -04:00
scan.c ACPI: verbose on kset/kobject_register errors 2006-08-15 23:32:24 -04:00
system.c ACPI: add 'const' to several ACPI file_operations 2006-07-10 00:04:29 -04:00
tables.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
thermal.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2006-07-10 15:14:38 -07:00
toshiba_acpi.c [ACPI] Lindent all ACPI files 2005-08-05 00:45:14 -04:00
utils.c ACPI: avoid irqrouter_resume might_sleep oops on resume from S4 2006-08-16 19:23:00 -04:00
video.c Pull acpi_device_handle_cleanup into release branch 2006-07-01 17:19:34 -04:00