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authorvenkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>2008-02-01 04:35:06 +0300
committerLen Brown <len.brown@intel.com>2008-02-07 10:20:15 +0300
commit9a0b841586c3c6c846effdbe75885c2ebc0031b0 (patch)
treed9522222094b6357c7933489b98c7249326e1cf8 /include/linux/cpuidle.h
parent9b12e18cdc1553de62d931e73443c806347cd974 (diff)
downloadlinux-9a0b841586c3c6c846effdbe75885c2ebc0031b0.tar.xz
cpuidle: Add a poll_idle method
Add a default poll idle state with 0 latency. Provides an option to users to use poll_idle by using 0 as the latency requirement. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux/cpuidle.h')
-rw-r--r--include/linux/cpuidle.h13
1 files changed, 10 insertions, 3 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index b0fd85ab9efb..385d45b616db 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -46,9 +46,10 @@ struct cpuidle_state {
/* Idle State Flags */
#define CPUIDLE_FLAG_TIME_VALID (0x01) /* is residency time measurable? */
#define CPUIDLE_FLAG_CHECK_BM (0x02) /* BM activity will exit state */
-#define CPUIDLE_FLAG_SHALLOW (0x10) /* low latency, minimal savings */
-#define CPUIDLE_FLAG_BALANCED (0x20) /* medium latency, moderate savings */
-#define CPUIDLE_FLAG_DEEP (0x40) /* high latency, large savings */
+#define CPUIDLE_FLAG_POLL (0x10) /* no latency, no savings */
+#define CPUIDLE_FLAG_SHALLOW (0x20) /* low latency, minimal savings */
+#define CPUIDLE_FLAG_BALANCED (0x40) /* medium latency, moderate savings */
+#define CPUIDLE_FLAG_DEEP (0x80) /* high latency, large savings */
#define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)
@@ -178,4 +179,10 @@ static inline void cpuidle_unregister_governor(struct cpuidle_governor *gov) { }
#endif
+#ifdef CONFIG_ARCH_HAS_CPU_RELAX
+#define CPUIDLE_DRIVER_STATE_START 1
+#else
+#define CPUIDLE_DRIVER_STATE_START 0
+#endif
+
#endif /* _LINUX_CPUIDLE_H */