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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2014 Imagination Technologies
 * Author: Paul Burton <paul.burton@mips.com>
 */

#ifndef __MIPS_ASM_PM_CPS_H__
#define __MIPS_ASM_PM_CPS_H__

/*
 * The CM & CPC can only handle coherence & power control on a per-core basis,
 * thus in an MT system the VP(E)s within each core are coupled and can only
 * enter or exit states requiring CM or CPC assistance in unison.
 */
#if defined(CONFIG_CPU_MIPSR6)
# define coupled_coherence cpu_has_vp
#elif defined(CONFIG_MIPS_MT)
# define coupled_coherence cpu_has_mipsmt
#else
# define coupled_coherence 0
#endif

/* Enumeration of possible PM states */
enum cps_pm_state {
	CPS_PM_NC_WAIT,		/* MIPS wait instruction, non-coherent */
	CPS_PM_CLOCK_GATED,	/* Core clock gated */
	CPS_PM_POWER_GATED,	/* Core power gated */
	CPS_PM_STATE_COUNT,
};

/**
 * cps_pm_support_state - determine whether the system supports a PM state
 * @state: the state to test for support
 *
 * Returns true if the system supports the given state, otherwise false.
 */
extern bool cps_pm_support_state(enum cps_pm_state state);

/**
 * cps_pm_enter_state - enter a PM state
 * @state: t