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/*
* cpuidle.h - xen idle state module derived from Linux
*
* (C) 2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
* Shaohua Li <shaohua.li@intel.com>
* Adam Belay <abelay@novell.com>
* Copyright (C) 2008 Intel Corporation
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef _XEN_CPUIDLE_H
#define _XEN_CPUIDLE_H
#include <xen/cpumask.h>
#include <xen/spinlock.h>
#define ACPI_PROCESSOR_MAX_POWER 8
#define CPUIDLE_NAME_LEN 16
#define ACPI_CSTATE_EM_NONE 0
#define ACPI_CSTATE_EM_SYSIO 1
#define ACPI_CSTATE_EM_FFH 2
#define ACPI_CSTATE_EM_HALT 3
struct acpi_processor_cx
{
u8 idx;
u8 type; /* ACPI_STATE_Cn */
u8 entry_method; /* ACPI_CSTATE_EM_xxx */
u32 address;
u32 latency;
u32 target_residency;
u32 usage;
u64 time;
};
struct acpi_processor_flags
{
u8 bm_control:1;
u8 bm_check:1;
u8 has_cst:1;
u8 power_setup_done:1;
u8 bm_rld_set:1;
};
struct acpi_processor_power
{
unsigned int cpu;
struct acpi_processor_flags flags;
struct acpi_processor_cx *last_state;
struct acpi_processor_cx *safe_state;
void *gdata; /* governor specific data */
u32 last_residency;
u32 count;
spinlock_t stat_lock;
struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
};
struct cpuidle_governor
{
char name[CPUIDLE_NAME_LEN];
unsigned int rating;
int (*enable) (struct acpi_processor_power *dev);
void (*disable) (struct acpi_processor_power *dev);
int (*select) (struct acpi_processor_power *dev);
void (*reflect) (struct acpi_processor_power *dev);
};
extern s8 xen_cpuidle;
extern struct cpuidle_governor *cpuidle_current_governor;
bool_t cpuidle_using_deep_cstate(void);
void cpuidle_disable_deep_cstate(void);
extern void cpuidle_wakeup_mwait(cpumask_t *mask);
#define CPUIDLE_DRIVER_STATE_START 1
extern void menu_get_trace_data(u32 *expected, u32 *pred);
#endif /* _XEN_CPUIDLE_H */
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