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Commit da9f970f authored by Paul Burton's avatar Paul Burton
Browse files

MIPS: cpuidle wait instruction state 



Defines a macro intended to allow trivial use of the regular MIPS wait
instruction from cpuidle drivers, which may simply invoke the macro
within their array of states.

Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
parent 0155a065

arch/mips/include/asm/idle.h

+14 −0
Original line number Diff line number Diff line 
#ifndef __ASM_IDLE_H

#define __ASM_IDLE_H



#include <linux/cpuidle.h>

#include <linux/linkage.h>



extern void (*cpu_wait)(void);
@@ -20,4 +21,17 @@ static inline int address_is_in_r4k_wait_irqoff(unsigned long addr) 
	       addr < (unsigned long)__pastwait;

}



extern int mips_cpuidle_wait_enter(struct cpuidle_device *dev,

				   struct cpuidle_driver *drv, int index);



#define MIPS_CPUIDLE_WAIT_STATE {\

	.enter			= mips_cpuidle_wait_enter,\

	.exit_latency		= 1,\

	.target_residency	= 1,\

	.power_usage		= UINT_MAX,\

	.flags			= CPUIDLE_FLAG_TIME_VALID,\

	.name			= "wait",\

	.desc			= "MIPS wait",\

}



#endif /* __ASM_IDLE_H  */

arch/mips/kernel/idle.c

+11 −0
Original line number Diff line number Diff line
@@ -250,3 +250,14 @@ void arch_cpu_idle(void) 
	else

		local_irq_enable();

}



#ifdef CONFIG_CPU_IDLE



int mips_cpuidle_wait_enter(struct cpuidle_device *dev,

			    struct cpuidle_driver *drv, int index)

{

	arch_cpu_idle();

	return index;

}



#endif