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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2005-07-29 16:15:00 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-08-26 15:09:24 -0700 |
| commit | 4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c (patch) | |
| tree | eb4cb14927ed9cf4507f875cd69fe35f87b3b3bc /include/asm-ia64/acpi.h | |
| parent | fd589e0b662c1ea8cfb1e0d20d60a2510979865b (diff) | |
| download | kernel_samsung_smdk4412-4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c.zip kernel_samsung_smdk4412-4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c.tar.gz kernel_samsung_smdk4412-4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c.tar.bz2 | |
[IA64] Add ACPI based P-state support
Patch to support P-state transitions on ia64. This driver is based on ACPI,
and uses the ACPI processor driver interface to find out the P-state support
information for the processor. This driver plugs into generic cpufreq
infrastructure.
Once this driver is loaded successfully, ondemand/userspace governor can be
used to change the CPU frequency dynamically based on load or on request from
userspace process.
Refer :
ACPI specification -
http://www.acpi.info
P-state related PAL calls -
http://developer.intel.com/design/itanium/downloads/24869909.pdf
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/asm-ia64/acpi.h')
| -rw-r--r-- | include/asm-ia64/acpi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-ia64/acpi.h b/include/asm-ia64/acpi.h index 4c06d45..3a544ff 100644 --- a/include/asm-ia64/acpi.h +++ b/include/asm-ia64/acpi.h @@ -116,6 +116,11 @@ extern int __initdata nid_to_pxm_map[MAX_NUMNODES]; extern u16 ia64_acpiid_to_sapicid[]; +/* + * Refer Intel ACPI _PDC support document for bit definitions + */ +#define ACPI_PDC_EST_CAPABILITY_SMP 0x8 + #endif /*__KERNEL__*/ #endif /*_ASM_ACPI_H*/ |