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authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>2005-07-29 16:15:00 -0700
committerTony Luck <tony.luck@intel.com>2005-08-26 15:09:24 -0700
commit4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c (patch)
treeeb4cb14927ed9cf4507f875cd69fe35f87b3b3bc /include/asm-ia64/acpi.h
parentfd589e0b662c1ea8cfb1e0d20d60a2510979865b (diff)
[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.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-ia64/acpi.h b/include/asm-ia64/acpi.h
index 4c06d455139c..3a544ffc5008 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*/