[RFC PATCH 01/31] cpufreq: move cpufreq.h file to the xen/include/xen location

[Oleksandr Tyshchenko <olekstysh@gmail.com>]

From: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@globallogic.com>

Cpufreq driver should be more generalizable (not ACPI-specific).
Thus this file should be placed to more convenient location.

This is a rebased version of the original patch:
https://lists.xen.org/archives/html/xen-devel/2014-11/msg00938.html

Signed-off-by: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@globallogic.com>
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
CC: Jan Beulich <jbeulich@suse.com>
CC: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Julien Grall <julien.grall@linaro.org>
---
 MAINTAINERS                                  |   1 +
 xen/arch/x86/acpi/cpu_idle.c                 |   2 +-
 xen/arch/x86/acpi/cpufreq/cpufreq.c          |   2 +-
 xen/arch/x86/acpi/cpufreq/powernow.c         |   2 +-
 xen/arch/x86/acpi/power.c                    |   2 +-
 xen/arch/x86/cpu/mwait-idle.c                |   2 +-
 xen/drivers/acpi/pmstat.c                    |   2 +-
 xen/drivers/cpufreq/cpufreq.c                |   2 +-
 xen/drivers/cpufreq/cpufreq_misc_governors.c |   2 +-
 xen/drivers/cpufreq/cpufreq_ondemand.c       |   4 +-
 xen/drivers/cpufreq/utility.c                |   2 +-
 xen/include/acpi/cpufreq/cpufreq.h           | 245 --------------------------
 xen/include/xen/cpufreq.h                    | 248 +++++++++++++++++++++++++++
 13 files changed, 260 insertions(+), 256 deletions(-)
 delete mode 100644 xen/include/acpi/cpufreq/cpufreq.h
 create mode 100644 xen/include/xen/cpufreq.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 5b9e123..524e067 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -295,6 +295,7 @@ X:	xen/arch/x86/acpi/boot.c
 X:	xen/arch/x86/acpi/lib.c
 F:	xen/drivers/cpufreq/
 F:	xen/include/acpi/cpufreq/
+F:	xen/include/xen/cpufreq.h
 
 PUBLIC I/O INTERFACES AND PV DRIVERS DESIGNS
 M:  Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
index 482b8a7..c66622e 100644
--- a/xen/arch/x86/acpi/cpu_idle.c
+++ b/xen/arch/x86/acpi/cpu_idle.c
@@ -49,7 +49,7 @@
 #include <xen/softirq.h>
 #include <public/platform.h>
 #include <public/sysctl.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 #include <asm/apic.h>
 #include <asm/cpuidle.h>
 #include <asm/mwait.h>
diff --git a/xen/arch/x86/acpi/cpufreq/cpufreq.c b/xen/arch/x86/acpi/cpufreq/cpufreq.c
index 1f8d02a..bd82025 100644
--- a/xen/arch/x86/acpi/cpufreq/cpufreq.c
+++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c
@@ -41,7 +41,7 @@
 #include <asm/percpu.h>
 #include <asm/cpufeature.h>
 #include <acpi/acpi.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 enum {
     UNDEFINED_CAPABLE = 0,
diff --git a/xen/arch/x86/acpi/cpufreq/powernow.c b/xen/arch/x86/acpi/cpufreq/powernow.c
index 8f1ac74..79f55a3 100644
--- a/xen/arch/x86/acpi/cpufreq/powernow.c
+++ b/xen/arch/x86/acpi/cpufreq/powernow.c
@@ -35,7 +35,7 @@
 #include <asm/percpu.h>
 #include <asm/cpufeature.h>
 #include <acpi/acpi.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 #define CPUID_FREQ_VOLT_CAPABILITIES    0x80000007
 #define CPB_CAPABLE             0x00000200
diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
index 1e4e568..beebd5a 100644
--- a/xen/arch/x86/acpi/power.c
+++ b/xen/arch/x86/acpi/power.c
@@ -28,7 +28,7 @@
 #include <asm/tboot.h>
 #include <asm/apic.h>
 #include <asm/io_apic.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 uint32_t system_reset_counter = 1;
 
diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c
index 762dff1..29f0286 100644
--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -58,7 +58,7 @@
 #include <asm/hpet.h>
 #include <asm/mwait.h>
 #include <asm/msr.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 #define MWAIT_IDLE_VERSION "0.4.1"
 #undef PREFIX
diff --git a/xen/drivers/acpi/pmstat.c b/xen/drivers/acpi/pmstat.c
index 2a6c4c7..2dbde1c 100644
--- a/xen/drivers/acpi/pmstat.c
+++ b/xen/drivers/acpi/pmstat.c
@@ -38,7 +38,7 @@
 #include <xen/acpi.h>
 
 #include <public/sysctl.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 #include <xen/pmstat.h>
 
 DEFINE_PER_CPU_READ_MOSTLY(struct pm_px *, cpufreq_statistic_data);
diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c
index 212f48f..ab909e2 100644
--- a/xen/drivers/cpufreq/cpufreq.c
+++ b/xen/drivers/cpufreq/cpufreq.c
@@ -43,7 +43,7 @@
 #include <asm/processor.h>
 #include <asm/percpu.h>
 #include <acpi/acpi.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 static unsigned int __read_mostly usr_min_freq;
 static unsigned int __read_mostly usr_max_freq;
diff --git a/xen/drivers/cpufreq/cpufreq_misc_governors.c b/xen/drivers/cpufreq/cpufreq_misc_governors.c
index 746bbcd..4a5510c 100644
--- a/xen/drivers/cpufreq/cpufreq_misc_governors.c
+++ b/xen/drivers/cpufreq/cpufreq_misc_governors.c
@@ -18,7 +18,7 @@
 #include <xen/init.h>
 #include <xen/percpu.h>
 #include <xen/sched.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 /*
  * cpufreq userspace governor
diff --git a/xen/drivers/cpufreq/cpufreq_ondemand.c b/xen/drivers/cpufreq/cpufreq_ondemand.c
index fe6c63d..1c384ec 100644
--- a/xen/drivers/cpufreq/cpufreq_ondemand.c
+++ b/xen/drivers/cpufreq/cpufreq_ondemand.c
@@ -1,5 +1,5 @@
 /*
- *  xen/arch/x86/acpi/cpufreq/cpufreq_ondemand.c
+ *  xen/drivers/cpufreq/cpufreq_ondemand.c
  *
  *  Copyright (C)  2001 Russell King
  *            (C)  2003 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>.
@@ -18,7 +18,7 @@
 #include <xen/types.h>
 #include <xen/sched.h>
 #include <xen/timer.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 
 #define DEF_FREQUENCY_UP_THRESHOLD              (80)
 #define MIN_FREQUENCY_UP_THRESHOLD              (11)
diff --git a/xen/drivers/cpufreq/utility.c b/xen/drivers/cpufreq/utility.c
index 53879fe..a687e5a 100644
--- a/xen/drivers/cpufreq/utility.c
+++ b/xen/drivers/cpufreq/utility.c
@@ -28,7 +28,7 @@
 #include <xen/sched.h>
 #include <xen/timer.h>
 #include <xen/trace.h>
-#include <acpi/cpufreq/cpufreq.h>
+#include <xen/cpufreq.h>
 #include <public/sysctl.h>
 
 struct cpufreq_driver   *cpufreq_driver;
diff --git a/xen/include/acpi/cpufreq/cpufreq.h b/xen/include/acpi/cpufreq/cpufreq.h
deleted file mode 100644
index a5cd7d0..0000000
--- a/xen/include/acpi/cpufreq/cpufreq.h
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- *  xen/include/acpi/cpufreq/cpufreq.h
- *
- *  Copyright (C) 2001 Russell King
- *            (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
- *
- * $Id: cpufreq.h,v 1.36 2003/01/20 17:31:48 db Exp $
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __XEN_CPUFREQ_PM_H__
-#define __XEN_CPUFREQ_PM_H__
-
-#include <xen/types.h>
-#include <xen/list.h>
-#include <xen/cpumask.h>
-
-#include "processor_perf.h"
-
-DECLARE_PER_CPU(spinlock_t, cpufreq_statistic_lock);
-
-extern bool_t cpufreq_verbose;
-
-struct cpufreq_governor;
-
-struct acpi_cpufreq_data {
-    struct processor_performance *acpi_data;
-    struct cpufreq_frequency_table *freq_table;
-    unsigned int arch_cpu_flags;
-};
-
-extern struct acpi_cpufreq_data *cpufreq_drv_data[NR_CPUS];
-
-struct cpufreq_cpuinfo {
-    unsigned int        max_freq;
-    unsigned int        second_max_freq;    /* P1 if Turbo Mode is on */
-    unsigned int        min_freq;
-    unsigned int        transition_latency; /* in 10^(-9) s = nanoseconds */
-};
-
-struct perf_limits {
-    bool_t no_turbo;
-    bool_t turbo_disabled;
-    uint32_t turbo_pct;
-    uint32_t max_perf_pct; /* max performance in percentage */
-    uint32_t min_perf_pct; /* min performance in percentage */
-    uint32_t max_perf;
-    uint32_t min_perf;
-    uint32_t max_policy_pct;
-    uint32_t min_policy_pct;
-};
-
-struct cpufreq_policy {
-    cpumask_var_t       cpus;          /* affected CPUs */
-    unsigned int        shared_type;   /* ANY or ALL affected CPUs
-                                          should set cpufreq */
-    unsigned int        cpu;           /* cpu nr of registered CPU */
-    struct cpufreq_cpuinfo    cpuinfo;
-
-    unsigned int        min;    /* in kHz */
-    unsigned int        max;    /* in kHz */
-    unsigned int        cur;    /* in kHz, only needed if cpufreq
-                                 * governors are used */
-    struct perf_limits  limits;
-    struct cpufreq_governor     *governor;
-
-    bool_t              resume; /* flag for cpufreq 1st run
-                                 * S3 wakeup, hotplug cpu, etc */
-    s8                  turbo;  /* tristate flag: 0 for unsupported
-                                 * -1 for disable, 1 for enabled
-                                 * See CPUFREQ_TURBO_* below for defines */
-    bool_t              aperf_mperf; /* CPU has APERF/MPERF MSRs */
-};
-DECLARE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_policy);
-
-extern int __cpufreq_set_policy(struct cpufreq_policy *data,
-                                struct cpufreq_policy *policy);
-
-#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
-#define CPUFREQ_SHARED_TYPE_HW   (1) /* HW does needed coordination */
-#define CPUFREQ_SHARED_TYPE_ALL  (2) /* All dependent CPUs should set freq */
-#define CPUFREQ_SHARED_TYPE_ANY  (3) /* Freq can be set from any dependent CPU*/
-
-/******************** cpufreq transition notifiers *******************/
-
-struct cpufreq_freqs {
-    unsigned int cpu;    /* cpu nr */
-    unsigned int old;
-    unsigned int new;
-    u8 flags;            /* flags of cpufreq_driver, see below. */
-};
-
-
-/*********************************************************************
- *                          CPUFREQ GOVERNORS                        *
- *********************************************************************/
-
-#define CPUFREQ_GOV_START  1
-#define CPUFREQ_GOV_STOP   2
-#define CPUFREQ_GOV_LIMITS 3
-
-struct cpufreq_governor {
-    char    name[CPUFREQ_NAME_LEN];
-    int     (*governor)(struct cpufreq_policy *policy,
-                        unsigned int event);
-    bool_t  (*handle_option)(const char *name, const char *value);
-    struct list_head governor_list;
-};
-
-extern struct cpufreq_governor *cpufreq_opt_governor;
-extern struct cpufreq_governor cpufreq_gov_dbs;
-extern struct cpufreq_governor cpufreq_gov_userspace;
-extern struct cpufreq_governor cpufreq_gov_performance;
-extern struct cpufreq_governor cpufreq_gov_powersave;
-
-extern struct list_head cpufreq_governor_list;
-
-extern int cpufreq_register_governor(struct cpufreq_governor *governor);
-extern struct cpufreq_governor *__find_governor(const char *governor);
-#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_dbs
-
-/* pass a target to the cpufreq driver */
-extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
-                                   unsigned int target_freq,
-                                   unsigned int relation);
-
-#define GOV_GETAVG     1
-#define USR_GETAVG     2
-extern int cpufreq_driver_getavg(unsigned int cpu, unsigned int flag);
-
-#define CPUFREQ_TURBO_DISABLED      -1
-#define CPUFREQ_TURBO_UNSUPPORTED   0
-#define CPUFREQ_TURBO_ENABLED       1
-
-extern int cpufreq_update_turbo(int cpuid, int new_state);
-extern int cpufreq_get_turbo_status(int cpuid);
-
-static __inline__ int 
-__cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
-{
-    return policy->governor->governor(policy, event);
-}
-
-
-/*********************************************************************
- *                      CPUFREQ DRIVER INTERFACE                     *
- *********************************************************************/
-
-#define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
-#define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
-
-struct cpufreq_driver {
-    char   name[CPUFREQ_NAME_LEN];
-    int    (*init)(struct cpufreq_policy *policy);
-    int    (*verify)(struct cpufreq_policy *policy);
-    int    (*setpolicy)(struct cpufreq_policy *policy);
-    int    (*update)(int cpuid, struct cpufreq_policy *policy);
-    int    (*target)(struct cpufreq_policy *policy,
-                     unsigned int target_freq,
-                     unsigned int relation);
-    unsigned int    (*get)(unsigned int cpu);
-    unsigned int    (*getavg)(unsigned int cpu, unsigned int flag);
-    int    (*exit)(struct cpufreq_policy *policy);
-};
-
-extern struct cpufreq_driver *cpufreq_driver;
-
-int cpufreq_register_driver(struct cpufreq_driver *);
-
-static __inline__
-void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
-                                  unsigned int min, unsigned int max)
-{
-    if (policy->min < min)
-        policy->min = min;
-    if (policy->max < min)
-        policy->max = min;
-    if (policy->min > max)
-        policy->min = max;
-    if (policy->max > max)
-        policy->max = max;
-    if (policy->min > policy->max)
-        policy->min = policy->max;
-    return;
-}
-
-
-/*********************************************************************
- *                     FREQUENCY TABLE HELPERS                       *
- *********************************************************************/
-
-#define CPUFREQ_ENTRY_INVALID ~0
-#define CPUFREQ_TABLE_END     ~1
-
-struct cpufreq_frequency_table {
-    unsigned int    index;     /* any */
-    unsigned int    frequency; /* kHz - doesn't need to be in ascending
-                                * order */
-};
-
-int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
-                   struct cpufreq_frequency_table *table);
-
-int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
-                   struct cpufreq_frequency_table *table);
-
-int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
-                   struct cpufreq_frequency_table *table,
-                   unsigned int target_freq,
-                   unsigned int relation,
-                   unsigned int *index);
-
-
-/*********************************************************************
- *                     UNIFIED DEBUG HELPERS                         *
- *********************************************************************/
-
-struct cpu_dbs_info_s {
-    uint64_t prev_cpu_idle;
-    uint64_t prev_cpu_wall;
-    struct cpufreq_policy *cur_policy;
-    struct cpufreq_frequency_table *freq_table;
-    int cpu;
-    unsigned int enable:1;
-    unsigned int stoppable:1;
-    unsigned int turbo_enabled:1;
-};
-
-int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event);
-int get_cpufreq_ondemand_para(uint32_t *sampling_rate_max,
-                              uint32_t *sampling_rate_min,
-                              uint32_t *sampling_rate,
-                              uint32_t *up_threshold);
-int write_ondemand_sampling_rate(unsigned int sampling_rate);
-int write_ondemand_up_threshold(unsigned int up_threshold);
-
-int write_userspace_scaling_setspeed(unsigned int cpu, unsigned int freq);
-
-void cpufreq_dbs_timer_suspend(void);
-void cpufreq_dbs_timer_resume(void);
-
-#endif /* __XEN_CPUFREQ_PM_H__ */
diff --git a/xen/include/xen/cpufreq.h b/xen/include/xen/cpufreq.h
new file mode 100644
index 0000000..ed38a6c
--- /dev/null
+++ b/xen/include/xen/cpufreq.h
@@ -0,0 +1,248 @@
+/*
+ *  xen/include/acpi/cpufreq/cpufreq.h
+ *
+ *  Copyright (C) 2001 Russell King
+ *            (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
+ *
+ * $Id: cpufreq.h,v 1.36 2003/01/20 17:31:48 db Exp $
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __XEN_CPUFREQ_PM_H__
+#define __XEN_CPUFREQ_PM_H__
+
+#include <xen/types.h>
+#include <xen/list.h>
+#include <xen/percpu.h>
+#include <xen/spinlock.h>
+#include <xen/errno.h>
+#include <xen/cpumask.h>
+
+#include <acpi/cpufreq/processor_perf.h>
+
+DECLARE_PER_CPU(spinlock_t, cpufreq_statistic_lock);
+
+extern bool_t cpufreq_verbose;
+
+struct cpufreq_governor;
+
+struct acpi_cpufreq_data {
+    struct processor_performance *acpi_data;
+    struct cpufreq_frequency_table *freq_table;
+    unsigned int arch_cpu_flags;
+};
+
+extern struct acpi_cpufreq_data *cpufreq_drv_data[NR_CPUS];
+
+struct cpufreq_cpuinfo {
+    unsigned int        max_freq;
+    unsigned int        second_max_freq;    /* P1 if Turbo Mode is on */
+    unsigned int        min_freq;
+    unsigned int        transition_latency; /* in 10^(-9) s = nanoseconds */
+};
+
+struct perf_limits {
+    bool_t no_turbo;
+    bool_t turbo_disabled;
+    uint32_t turbo_pct;
+    uint32_t max_perf_pct; /* max performance in percentage */
+    uint32_t min_perf_pct; /* min performance in percentage */
+    uint32_t max_perf;
+    uint32_t min_perf;
+    uint32_t max_policy_pct;
+    uint32_t min_policy_pct;
+};
+
+struct cpufreq_policy {
+    cpumask_var_t       cpus;          /* affected CPUs */
+    unsigned int        shared_type;   /* ANY or ALL affected CPUs
+                                          should set cpufreq */
+    unsigned int        cpu;           /* cpu nr of registered CPU */
+    struct cpufreq_cpuinfo    cpuinfo;
+
+    unsigned int        min;    /* in kHz */
+    unsigned int        max;    /* in kHz */
+    unsigned int        cur;    /* in kHz, only needed if cpufreq
+                                 * governors are used */
+    struct perf_limits  limits;
+    struct cpufreq_governor     *governor;
+
+    bool_t              resume; /* flag for cpufreq 1st run
+                                 * S3 wakeup, hotplug cpu, etc */
+    s8                  turbo;  /* tristate flag: 0 for unsupported
+                                 * -1 for disable, 1 for enabled
+                                 * See CPUFREQ_TURBO_* below for defines */
+    bool_t              aperf_mperf; /* CPU has APERF/MPERF MSRs */
+};
+DECLARE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_policy);
+
+extern int __cpufreq_set_policy(struct cpufreq_policy *data,
+                                struct cpufreq_policy *policy);
+
+#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
+#define CPUFREQ_SHARED_TYPE_HW   (1) /* HW does needed coordination */
+#define CPUFREQ_SHARED_TYPE_ALL  (2) /* All dependent CPUs should set freq */
+#define CPUFREQ_SHARED_TYPE_ANY  (3) /* Freq can be set from any dependent CPU*/
+
+/******************** cpufreq transition notifiers *******************/
+
+struct cpufreq_freqs {
+    unsigned int cpu;    /* cpu nr */
+    unsigned int old;
+    unsigned int new;
+    u8 flags;            /* flags of cpufreq_driver, see below. */
+};
+
+
+/*********************************************************************
+ *                          CPUFREQ GOVERNORS                        *
+ *********************************************************************/
+
+#define CPUFREQ_GOV_START  1
+#define CPUFREQ_GOV_STOP   2
+#define CPUFREQ_GOV_LIMITS 3
+
+struct cpufreq_governor {
+    char    name[CPUFREQ_NAME_LEN];
+    int     (*governor)(struct cpufreq_policy *policy,
+                        unsigned int event);
+    bool_t  (*handle_option)(const char *name, const char *value);
+    struct list_head governor_list;
+};
+
+extern struct cpufreq_governor *cpufreq_opt_governor;
+extern struct cpufreq_governor cpufreq_gov_dbs;
+extern struct cpufreq_governor cpufreq_gov_userspace;
+extern struct cpufreq_governor cpufreq_gov_performance;
+extern struct cpufreq_governor cpufreq_gov_powersave;
+
+extern struct list_head cpufreq_governor_list;
+
+extern int cpufreq_register_governor(struct cpufreq_governor *governor);
+extern struct cpufreq_governor *__find_governor(const char *governor);
+#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_dbs
+
+/* pass a target to the cpufreq driver */
+extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
+                                   unsigned int target_freq,
+                                   unsigned int relation);
+
+#define GOV_GETAVG     1
+#define USR_GETAVG     2
+extern int cpufreq_driver_getavg(unsigned int cpu, unsigned int flag);
+
+#define CPUFREQ_TURBO_DISABLED      -1
+#define CPUFREQ_TURBO_UNSUPPORTED   0
+#define CPUFREQ_TURBO_ENABLED       1
+
+extern int cpufreq_update_turbo(int cpuid, int new_state);
+extern int cpufreq_get_turbo_status(int cpuid);
+
+static __inline__ int 
+__cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
+{
+    return policy->governor->governor(policy, event);
+}
+
+
+/*********************************************************************
+ *                      CPUFREQ DRIVER INTERFACE                     *
+ *********************************************************************/
+
+#define CPUFREQ_RELATION_L 0  /* lowest frequency at or above target */
+#define CPUFREQ_RELATION_H 1  /* highest frequency below or at target */
+
+struct cpufreq_driver {
+    char   name[CPUFREQ_NAME_LEN];
+    int    (*init)(struct cpufreq_policy *policy);
+    int    (*verify)(struct cpufreq_policy *policy);
+    int    (*setpolicy)(struct cpufreq_policy *policy);
+    int    (*update)(int cpuid, struct cpufreq_policy *policy);
+    int    (*target)(struct cpufreq_policy *policy,
+                     unsigned int target_freq,
+                     unsigned int relation);
+    unsigned int    (*get)(unsigned int cpu);
+    unsigned int    (*getavg)(unsigned int cpu, unsigned int flag);
+    int    (*exit)(struct cpufreq_policy *policy);
+};
+
+extern struct cpufreq_driver *cpufreq_driver;
+
+int cpufreq_register_driver(struct cpufreq_driver *);
+
+static __inline__
+void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
+                                  unsigned int min, unsigned int max)
+{
+    if (policy->min < min)
+        policy->min = min;
+    if (policy->max < min)
+        policy->max = min;
+    if (policy->min > max)
+        policy->min = max;
+    if (policy->max > max)
+        policy->max = max;
+    if (policy->min > policy->max)
+        policy->min = policy->max;
+    return;
+}
+
+
+/*********************************************************************
+ *                     FREQUENCY TABLE HELPERS                       *
+ *********************************************************************/
+
+#define CPUFREQ_ENTRY_INVALID ~0
+#define CPUFREQ_TABLE_END     ~1
+
+struct cpufreq_frequency_table {
+    unsigned int    index;     /* any */
+    unsigned int    frequency; /* kHz - doesn't need to be in ascending
+                                * order */
+};
+
+int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
+                   struct cpufreq_frequency_table *table);
+
+int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
+                   struct cpufreq_frequency_table *table);
+
+int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
+                   struct cpufreq_frequency_table *table,
+                   unsigned int target_freq,
+                   unsigned int relation,
+                   unsigned int *index);
+
+
+/*********************************************************************
+ *                     UNIFIED DEBUG HELPERS                         *
+ *********************************************************************/
+
+struct cpu_dbs_info_s {
+    uint64_t prev_cpu_idle;
+    uint64_t prev_cpu_wall;
+    struct cpufreq_policy *cur_policy;
+    struct cpufreq_frequency_table *freq_table;
+    int cpu;
+    unsigned int enable:1;
+    unsigned int stoppable:1;
+    unsigned int turbo_enabled:1;
+};
+
+int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event);
+int get_cpufreq_ondemand_para(uint32_t *sampling_rate_max,
+                              uint32_t *sampling_rate_min,
+                              uint32_t *sampling_rate,
+                              uint32_t *up_threshold);
+int write_ondemand_sampling_rate(unsigned int sampling_rate);
+int write_ondemand_up_threshold(unsigned int up_threshold);
+
+int write_userspace_scaling_setspeed(unsigned int cpu, unsigned int freq);
+
+void cpufreq_dbs_timer_suspend(void);
+void cpufreq_dbs_timer_resume(void);
+
+#endif /* __XEN_CPUFREQ_PM_H__ */
-- 
2.7.4


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