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cpuvar.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_CPUVAR_H
#define     _SYS_CPUVAR_H

#include <sys/thread.h>
#include <sys/sysinfo.h>      /* has cpu_stat_t definition */
#include <sys/disp.h>
#include <sys/processor.h>

#if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
#include <sys/machcpuvar.h>
#endif

#include <sys/types.h>
#include <sys/file.h>
#include <sys/bitmap.h>
#include <sys/rwlock.h>
#include <sys/msacct.h>
#if defined(__GNUC__) && defined(_ASM_INLINES) && defined(_KERNEL) && \
      (defined(__i386) || defined(__amd64))
#include <asm/cpuvar.h>
#endif

#ifdef      __cplusplus
extern "C" {
#endif

struct squeue_set_s;

#define     CPU_CACHE_COHERENCE_SIZE      64
#define     S_LOADAVG_SZ      11
#define     S_MOVAVG_SZ 10

struct loadavg_s {
      int lg_cur;       /* current loadavg entry */
      unsigned int lg_len;    /* number entries recorded */
      hrtime_t lg_total;      /* used to temporarily hold load totals */
      hrtime_t lg_loads[S_LOADAVG_SZ];    /* table of recorded entries */
};

/*
 * For fast event tracing.
 */
struct ftrace_record;
typedef struct ftrace_data {
      int               ftd_state;  /* ftrace flags */
      kmutex_t          ftd_unused; /* ftrace buffer lock, unused */
      struct ftrace_record    *ftd_cur;   /* current record */
      struct ftrace_record    *ftd_first; /* first record */
      struct ftrace_record    *ftd_last;  /* last record */
} ftrace_data_t;

struct cyc_cpu;
struct nvlist;

/*
 * Per-CPU data.
 *
 * Be careful adding new members: if they are not the same in all modules (e.g.
 * change size depending on a #define), CTF uniquification can fail to work
 * properly.  Furthermore, this is transitive in that it applies recursively to
 * all types pointed to by cpu_t.
 */
typedef struct cpu {
      processorid_t     cpu_id;                 /* CPU number */
      processorid_t     cpu_seqid;  /* sequential CPU id (0..ncpus-1) */
      volatile cpu_flag_t cpu_flags;            /* flags indicating CPU state */
      struct cpu  *cpu_self;        /* pointer to itself */
      kthread_t   *cpu_thread;            /* current thread */
      kthread_t   *cpu_idle_thread; /* idle thread for this CPU */
      kthread_t   *cpu_pause_thread;      /* pause thread for this CPU */
      klwp_id_t   cpu_lwp;          /* current lwp (if any) */
      klwp_id_t   cpu_fpowner;            /* currently loaded fpu owner */
      struct cpupart    *cpu_part;        /* partition with this CPU */
      struct lgrp_ld    *cpu_lpl;         /* pointer to this cpu's load */
      int         cpu_cache_offset; /* see kmem.c for details */

      /*
       * Links to other CPUs.  It is safe to walk these lists if
       * one of the following is true:
       *    - cpu_lock held
       *    - preemption disabled via kpreempt_disable
       *    - PIL >= DISP_LEVEL
       *    - acting thread is an interrupt thread
       *    - all other CPUs are paused
       */
      struct cpu  *cpu_next;        /* next existing CPU */
      struct cpu  *cpu_prev;        /* prev existing CPU */
      struct cpu  *cpu_next_onln;         /* next online (enabled) CPU */
      struct cpu  *cpu_prev_onln;         /* prev online (enabled) CPU */
      struct cpu  *cpu_next_part;         /* next CPU in partition */
      struct cpu  *cpu_prev_part;         /* prev CPU in partition */
      struct cpu  *cpu_next_lgrp;         /* next CPU in latency group */
      struct cpu  *cpu_prev_lgrp;         /* prev CPU in latency group */
      struct cpu  *cpu_next_lpl;          /* next CPU in lgrp partition */
      struct cpu  *cpu_prev_lpl;

      struct cpu_pg     *cpu_pg;          /* cpu's processor groups */

      void        *cpu_reserved[4]; /* reserved for future use */

      /*
       * Scheduling variables.
       */
      disp_t            *cpu_disp;        /* dispatch queue data */
      /*
       * Note that cpu_disp is set before the CPU is added to the system
       * and is never modified.  Hence, no additional locking is needed
       * beyond what's necessary to access the cpu_t structure.
       */
      char        cpu_runrun; /* scheduling flag - set to preempt */
      char        cpu_kprunrun;           /* force kernel preemption */
      pri_t       cpu_chosen_level;       /* priority at which cpu */
                                    /* was chosen for scheduling */
      kthread_t   *cpu_dispthread; /* thread selected for dispatch */
      disp_lock_t cpu_thread_lock; /* dispatcher lock on current thread */
      uint8_t           cpu_disp_flags;   /* flags used by dispatcher */
      /*
       * The following field is updated when ever the cpu_dispthread
       * changes. Also in places, where the current thread(cpu_dispthread)
       * priority changes. This is used in disp_lowpri_cpu()
       */
      pri_t       cpu_dispatch_pri; /* priority of cpu_dispthread */
      clock_t           cpu_last_swtch;   /* last time switched to new thread */

      /*
       * Interrupt data.
       */
      caddr_t           cpu_intr_stack;   /* interrupt stack */
      kthread_t   *cpu_intr_thread; /* interrupt thread list */
      uint_t            cpu_intr_actv;    /* interrupt levels active (bitmask) */
      int         cpu_base_spl;     /* priority for highest rupt active */

      /*
       * Statistics.
       */
      cpu_stats_t cpu_stats;        /* per-CPU statistics */
      struct kstat      *cpu_info_kstat;  /* kstat for cpu info */

      uintptr_t   cpu_profile_pc;   /* kernel PC in profile interrupt */
      uintptr_t   cpu_profile_upc; /* user PC in profile interrupt */
      uintptr_t   cpu_profile_pil; /* PIL when profile interrupted */

      ftrace_data_t     cpu_ftrace;       /* per cpu ftrace data */

      clock_t           cpu_deadman_lbolt;      /* used by deadman() */
      uint_t            cpu_deadman_countdown;  /* used by deadman() */

      kmutex_t    cpu_cpc_ctxlock; /* protects context for idle thread */
      kcpc_ctx_t  *cpu_cpc_ctx;     /* performance counter context */

      /*
       * Configuration information for the processor_info system call.
       */
      processor_info_t cpu_type_info;     /* config info */
      time_t            cpu_state_begin; /* when CPU entered current state */
      char        cpu_cpr_flags;    /* CPR related info */
      struct cyc_cpu    *cpu_cyclic;      /* per cpu cyclic subsystem data */
      struct squeue_set_s *cpu_squeue_set;      /* per cpu squeue set */
      struct nvlist     *cpu_props; /* pool-related properties */

      krwlock_t   cpu_ft_lock;            /* DTrace: fasttrap lock */
      uintptr_t   cpu_dtrace_caller;      /* DTrace: caller, if any */
      hrtime_t    cpu_dtrace_chillmark;   /* DTrace: chill mark time */
      hrtime_t    cpu_dtrace_chilled;     /* DTrace: total chill time */
      volatile uint16_t cpu_mstate;       /* cpu microstate */
      volatile uint16_t cpu_mstate_gen;   /* generation counter */
      volatile hrtime_t cpu_mstate_start; /* cpu microstate start time */
      volatile hrtime_t cpu_acct[NCMSTATES];    /* cpu microstate data */
      hrtime_t    cpu_intracct[NCMSTATES]; /* interrupt mstate data */
      hrtime_t    cpu_waitrq;       /* cpu run-queue wait time */
      struct loadavg_s cpu_loadavg;       /* loadavg info for this cpu */

      char        *cpu_idstr; /* for printing and debugging */
      char        *cpu_brandstr;    /* for printing */

      /*
       * Sum of all device interrupt weights that are currently directed at
       * this cpu. Cleared at start of interrupt redistribution.
       */
      int32_t           cpu_intr_weight;
      void        *cpu_vm_data;

      struct cpu_physid *cpu_physid;      /* physical associations */

      uint64_t    cpu_curr_clock;         /* current clock freq in Hz */
      char        *cpu_supp_freqs;  /* supported freqs in Hz */

      /*
       * Interrupt load factor used by dispatcher & softcall
       */
      hrtime_t    cpu_intrlast;   /* total interrupt time (nsec) */
      int         cpu_intrload;   /* interrupt load factor (0-99%) */

      /*
       * New members must be added /before/ this member, as the CTF tools
       * rely on this being the last field before cpu_m, so they can
       * correctly calculate the offset when synthetically adding the cpu_m
       * member in objects that do not have it.  This fixup is required for
       * uniquification to work correctly.
       */
      uintptr_t   cpu_m_pad;

#if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)
      struct machcpu    cpu_m;            /* per architecture info */
#endif
} cpu_t;

/*
 * The cpu_core structure consists of per-CPU state available in any context.
 * On some architectures, this may mean that the page(s) containing the
 * NCPU-sized array of cpu_core structures must be locked in the TLB -- it
 * is up to the platform to assure that this is performed properly.  Note that
 * the structure is sized to avoid false sharing.
 */
#define     CPUC_SIZE         (sizeof (uint16_t) + sizeof (uintptr_t) + \
                        sizeof (kmutex_t))
#define     CPUC_PADSIZE            CPU_CACHE_COHERENCE_SIZE - CPUC_SIZE

typedef struct cpu_core {
      uint16_t    cpuc_dtrace_flags;      /* DTrace flags */
      uint8_t           cpuc_pad[CPUC_PADSIZE]; /* padding */
      uintptr_t   cpuc_dtrace_illval;     /* DTrace illegal value */
      kmutex_t    cpuc_pid_lock;          /* DTrace pid provider lock */
} cpu_core_t;

#ifdef _KERNEL
extern cpu_core_t cpu_core[];
#endif /* _KERNEL */

/*
 * CPU_ON_INTR() macro. Returns non-zero if currently on interrupt stack.
 * Note that this isn't a test for a high PIL.  For example, cpu_intr_actv
 * does not get updated when we go through sys_trap from TL>0 at high PIL.
 * getpil() should be used instead to check for PIL levels.
 */
#define     CPU_ON_INTR(cpup) ((cpup)->cpu_intr_actv >> (LOCK_LEVEL + 1))

#if defined(_KERNEL) || defined(_KMEMUSER)

#define     INTR_STACK_SIZE   MAX(DEFAULTSTKSZ, PAGESIZE)

/* MEMBERS PROTECTED BY "atomicity": cpu_flags */

/*
 * Flags in the CPU structure.
 *
 * These are protected by cpu_lock (except during creation).
 *
 * Offlined-CPUs have three stages of being offline:
 *
 * CPU_ENABLE indicates that the CPU is participating in I/O interrupts
 * that can be directed at a number of different CPUs.  If CPU_ENABLE
 * is off, the CPU will not be given interrupts that can be sent elsewhere,
 * but will still get interrupts from devices associated with that CPU only,
 * and from other CPUs.
 *
 * CPU_OFFLINE indicates that the dispatcher should not allow any threads
 * other than interrupt threads to run on that CPU.  A CPU will not have
 * CPU_OFFLINE set if there are any bound threads (besides interrupts).
 *
 * CPU_QUIESCED is set if p_offline was able to completely turn idle the
 * CPU and it will not have to run interrupt threads.  In this case it'll
 * stay in the idle loop until CPU_QUIESCED is turned off.
 *
 * CPU_FROZEN is used only by CPR to mark CPUs that have been successfully
 * suspended (in the suspend path), or have yet to be resumed (in the resume
 * case).
 *
 * On some platforms CPUs can be individually powered off.
 * The following flags are set for powered off CPUs: CPU_QUIESCED,
 * CPU_OFFLINE, and CPU_POWEROFF.  The following flags are cleared:
 * CPU_RUNNING, CPU_READY, CPU_EXISTS, and CPU_ENABLE.
 */
#define     CPU_RUNNING 0x001       /* CPU running */
#define     CPU_READY   0x002       /* CPU ready for cross-calls */
#define     CPU_QUIESCED      0x004       /* CPU will stay in idle */
#define     CPU_EXISTS  0x008       /* CPU is configured */
#define     CPU_ENABLE  0x010       /* CPU enabled for interrupts */
#define     CPU_OFFLINE 0x020       /* CPU offline via p_online */
#define     CPU_POWEROFF      0x040       /* CPU is powered off */
#define     CPU_FROZEN  0x080       /* CPU is frozen via CPR suspend */
#define     CPU_SPARE   0x100       /* CPU offline available for use */
#define     CPU_FAULTED 0x200       /* CPU offline diagnosed faulty */

#define     FMT_CPU_FLAGS                                         \
      "\20\12fault\11spare\10frozen"                              \
      "\7poweroff\6offline\5enable\4exist\3quiesced\2ready\1run"

#define     CPU_ACTIVE(cpu)   (((cpu)->cpu_flags & CPU_OFFLINE) == 0)

/*
 * Flags for cpu_offline(), cpu_faulted(), and cpu_spare().
 */
#define     CPU_FORCED  0x0001            /* Force CPU offline */

/*
 * DTrace flags.
 */
#define     CPU_DTRACE_NOFAULT      0x0001      /* Don't fault */
#define     CPU_DTRACE_DROP         0x0002      /* Drop this ECB */
#define     CPU_DTRACE_BADADDR      0x0004      /* DTrace fault: bad address */
#define     CPU_DTRACE_BADALIGN     0x0008      /* DTrace fault: bad alignment */
#define     CPU_DTRACE_DIVZERO      0x0010      /* DTrace fault: divide by zero */
#define     CPU_DTRACE_ILLOP  0x0020      /* DTrace fault: illegal operation */
#define     CPU_DTRACE_NOSCRATCH    0x0040      /* DTrace fault: out of scratch */
#define     CPU_DTRACE_KPRIV  0x0080      /* DTrace fault: bad kernel access */
#define     CPU_DTRACE_UPRIV  0x0100      /* DTrace fault: bad user access */
#define     CPU_DTRACE_TUPOFLOW     0x0200      /* DTrace fault: tuple stack overflow */
#if defined(__sparc)
#define     CPU_DTRACE_FAKERESTORE  0x0400      /* pid provider hint to getreg */
#endif
#define     CPU_DTRACE_ENTRY  0x0800      /* pid provider hint to ustack() */
#define     CPU_DTRACE_BADSTACK     0x1000      /* DTrace fault: bad stack */

#define     CPU_DTRACE_FAULT  (CPU_DTRACE_BADADDR | CPU_DTRACE_BADALIGN | \
                        CPU_DTRACE_DIVZERO | CPU_DTRACE_ILLOP | \
                        CPU_DTRACE_NOSCRATCH | CPU_DTRACE_KPRIV | \
                        CPU_DTRACE_UPRIV | CPU_DTRACE_TUPOFLOW | \
                        CPU_DTRACE_BADSTACK)
#define     CPU_DTRACE_ERROR  (CPU_DTRACE_FAULT | CPU_DTRACE_DROP)

/*
 * Dispatcher flags
 * These flags must be changed only by the current CPU.
 */
#define     CPU_DISP_DONTSTEAL      0x01  /* CPU undergoing context swtch */
#define     CPU_DISP_HALTED         0x02  /* CPU halted waiting for interrupt */


#endif /* _KERNEL || _KMEMUSER */

#if (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP)

/*
 * Macros for manipulating sets of CPUs as a bitmap.  Note that this
 * bitmap may vary in size depending on the maximum CPU id a specific
 * platform supports.  This may be different than the number of CPUs
 * the platform supports, since CPU ids can be sparse.  We define two
 * sets of macros; one for platforms where the maximum CPU id is less
 * than the number of bits in a single word (32 in a 32-bit kernel,
 * 64 in a 64-bit kernel), and one for platforms that require bitmaps
 * of more than one word.
 */

#define     CPUSET_WORDS      BT_BITOUL(NCPU)
#define     CPUSET_NOTINSET   ((uint_t)-1)

#if   CPUSET_WORDS > 1

typedef struct cpuset {
      ulong_t     cpub[CPUSET_WORDS];
} cpuset_t;

/*
 * Private functions for manipulating cpusets that do not fit in a
 * single word.  These should not be used directly; instead the
 * CPUSET_* macros should be used so the code will be portable
 * across different definitions of NCPU.
 */
extern      void  cpuset_all(cpuset_t *);
extern      void  cpuset_all_but(cpuset_t *, uint_t);
extern      int   cpuset_isnull(cpuset_t *);
extern      int   cpuset_cmp(cpuset_t *, cpuset_t *);
extern      void  cpuset_only(cpuset_t *, uint_t);
extern      uint_t      cpuset_find(cpuset_t *);
extern      void  cpuset_bounds(cpuset_t *, uint_t *, uint_t *);

#define     CPUSET_ALL(set)               cpuset_all(&(set))
#define     CPUSET_ALL_BUT(set, cpu)      cpuset_all_but(&(set), cpu)
#define     CPUSET_ONLY(set, cpu)         cpuset_only(&(set), cpu)
#define     CPU_IN_SET(set, cpu)          BT_TEST((set).cpub, cpu)
#define     CPUSET_ADD(set, cpu)          BT_SET((set).cpub, cpu)
#define     CPUSET_DEL(set, cpu)          BT_CLEAR((set).cpub, cpu)
#define     CPUSET_ISNULL(set)            cpuset_isnull(&(set))
#define     CPUSET_ISEQUAL(set1, set2)    cpuset_cmp(&(set1), &(set2))

/*
 * Find one CPU in the cpuset.
 * Sets "cpu" to the id of the found CPU, or CPUSET_NOTINSET if no cpu
 * could be found. (i.e. empty set)
 */
#define     CPUSET_FIND(set, cpu)         {           \
      cpu = cpuset_find(&(set));                \
}

/*
 * Determine the smallest and largest CPU id in the set. Returns
 * CPUSET_NOTINSET in smallest and largest when set is empty.
 */
#define     CPUSET_BOUNDS(set, smallest, largest)     {           \
      cpuset_bounds(&(set), &(smallest), &(largest));       \
}

/*
 * Atomic cpuset operations
 * These are safe to use for concurrent cpuset manipulations.
 * "xdel" and "xadd" are exclusive operations, that set "result" to "0"
 * if the add or del was successful, or "-1" if not successful.
 * (e.g. attempting to add a cpu to a cpuset that's already there, or
 * deleting a cpu that's not in the cpuset)
 */

#define     CPUSET_ATOMIC_DEL(set, cpu)   BT_ATOMIC_CLEAR((set).cpub, (cpu))
#define     CPUSET_ATOMIC_ADD(set, cpu)   BT_ATOMIC_SET((set).cpub, (cpu))

#define     CPUSET_ATOMIC_XADD(set, cpu, result) \
      BT_ATOMIC_SET_EXCL((set).cpub, cpu, result)

#define     CPUSET_ATOMIC_XDEL(set, cpu, result) \
      BT_ATOMIC_CLEAR_EXCL((set).cpub, cpu, result)


#define     CPUSET_OR(set1, set2)         {           \
      int _i;                                   \
      for (_i = 0; _i < CPUSET_WORDS; _i++)           \
            (set1).cpub[_i] |= (set2).cpub[_i]; \
}

#define     CPUSET_XOR(set1, set2)        {           \
      int _i;                                   \
      for (_i = 0; _i < CPUSET_WORDS; _i++)           \
            (set1).cpub[_i] ^= (set2).cpub[_i]; \
}

#define     CPUSET_AND(set1, set2)        {           \
      int _i;                                   \
      for (_i = 0; _i < CPUSET_WORDS; _i++)           \
            (set1).cpub[_i] &= (set2).cpub[_i]; \
}

#define     CPUSET_ZERO(set)        {           \
      int _i;                                   \
      for (_i = 0; _i < CPUSET_WORDS; _i++)           \
            (set).cpub[_i] = 0;                 \
}

#elif CPUSET_WORDS == 1

typedef     ulong_t     cpuset_t;   /* a set of CPUs */

#define     CPUSET(cpu)             (1UL << (cpu))

#define     CPUSET_ALL(set)               ((void)((set) = ~0UL))
#define     CPUSET_ALL_BUT(set, cpu)      ((void)((set) = ~CPUSET(cpu)))
#define     CPUSET_ONLY(set, cpu)         ((void)((set) = CPUSET(cpu)))
#define     CPU_IN_SET(set, cpu)          ((set) & CPUSET(cpu))
#define     CPUSET_ADD(set, cpu)          ((void)((set) |= CPUSET(cpu)))
#define     CPUSET_DEL(set, cpu)          ((void)((set) &= ~CPUSET(cpu)))
#define     CPUSET_ISNULL(set)            ((set) == 0)
#define     CPUSET_ISEQUAL(set1, set2)    ((set1) == (set2))
#define     CPUSET_OR(set1, set2)         ((void)((set1) |= (set2)))
#define     CPUSET_XOR(set1, set2)        ((void)((set1) ^= (set2)))
#define     CPUSET_AND(set1, set2)        ((void)((set1) &= (set2)))
#define     CPUSET_ZERO(set)        ((void)((set) = 0))

#define     CPUSET_FIND(set, cpu)         {           \
      cpu = (uint_t)(lowbit(set) - 1);                      \
}

#define     CPUSET_BOUNDS(set, smallest, largest)     {     \
      smallest = (uint_t)(lowbit(set) - 1);           \
      largest = (uint_t)(highbit(set) - 1);           \
}

#define     CPUSET_ATOMIC_DEL(set, cpu)   atomic_and_long(&(set), ~CPUSET(cpu))
#define     CPUSET_ATOMIC_ADD(set, cpu)   atomic_or_long(&(set), CPUSET(cpu))

#define     CPUSET_ATOMIC_XADD(set, cpu, result) \
      { result = atomic_set_long_excl(&(set), (cpu)); }

#define     CPUSET_ATOMIC_XDEL(set, cpu, result) \
      { result = atomic_clear_long_excl(&(set), (cpu)); }

#else /* CPUSET_WORDS <= 0 */

#error NCPU is undefined or invalid

#endif      /* CPUSET_WORDS   */

extern cpuset_t cpu_seqid_inuse;

#endif      /* (_KERNEL || _KMEMUSER) && _MACHDEP */

#define     CPU_CPR_OFFLINE         0x0
#define     CPU_CPR_ONLINE          0x1
#define     CPU_CPR_IS_OFFLINE(cpu) (((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE) == 0)
#define     CPU_CPR_IS_ONLINE(cpu)  ((cpu)->cpu_cpr_flags & CPU_CPR_ONLINE)
#define     CPU_SET_CPR_FLAGS(cpu, flag)  ((cpu)->cpu_cpr_flags |= flag)

#if defined(_KERNEL) || defined(_KMEMUSER)

extern struct cpu *cpu[];           /* indexed by CPU number */
extern cpu_t            *cpu_list;  /* list of CPUs */
extern cpu_t            *cpu_active;      /* list of active CPUs */
extern int        ncpus;            /* number of CPUs present */
extern int        ncpus_online;     /* number of CPUs not quiesced */
extern int        max_ncpus;  /* max present before ncpus is known */
extern int        boot_max_ncpus;   /* like max_ncpus but for real */
extern int        boot_ncpus; /* # cpus present @ boot */
extern processorid_t    max_cpuid;  /* maximum CPU number */
extern struct cpu *cpu_inmotion;    /* offline or partition move target */
extern cpu_t            *clock_cpu_list;

#if defined(__i386) || defined(__amd64)
extern struct cpu *curcpup(void);
#define     CPU         (curcpup()) /* Pointer to current CPU */
#else
#define     CPU         (curthread->t_cpu)      /* Pointer to current CPU */
#endif

/*
 * CPU_CURRENT indicates to thread_affinity_set to use CPU->cpu_id
 * as the target and to grab cpu_lock instead of requiring the caller
 * to grab it.
 */
#define     CPU_CURRENT -3

/*
 * Per-CPU statistics
 *
 * cpu_stats_t contains numerous system and VM-related statistics, in the form
 * of gauges or monotonically-increasing event occurrence counts.
 */

#define     CPU_STATS_ENTER_K()     kpreempt_disable()
#define     CPU_STATS_EXIT_K()      kpreempt_enable()

#define     CPU_STATS_ADD_K(class, stat, amount) \
      {     kpreempt_disable(); /* keep from switching CPUs */\
            CPU_STATS_ADDQ(CPU, class, stat, amount); \
            kpreempt_enable(); \
      }

#define     CPU_STATS_ADDQ(cp, class, stat, amount)   {                 \
      extern void __dtrace_probe___cpu_##class##info_##stat(uint_t,     \
          uint64_t *, cpu_t *);                             \
      uint64_t *stataddr = &((cp)->cpu_stats.class.stat);         \
      __dtrace_probe___cpu_##class##info_##stat((amount),         \
          stataddr, cp);                                    \
      *(stataddr) += (amount);                              \
}

#define     CPU_STATS(cp, stat)                                       \
      ((cp)->cpu_stats.stat)

#endif /* _KERNEL || _KMEMUSER */

/*
 * CPU support routines.
 */
#if   defined(_KERNEL) && defined(__STDC__)     /* not for genassym.c */

struct zone;

void  cpu_list_init(cpu_t *);
void  cpu_add_unit(cpu_t *);
void  cpu_del_unit(int cpuid);
void  cpu_add_active(cpu_t *);
void  cpu_kstat_init(cpu_t *);
void  cpu_visibility_add(cpu_t *, struct zone *);
void  cpu_visibility_remove(cpu_t *, struct zone *);
void  cpu_visibility_configure(cpu_t *, struct zone *);
void  cpu_visibility_unconfigure(cpu_t *, struct zone *);
void  cpu_visibility_online(cpu_t *, struct zone *);
void  cpu_visibility_offline(cpu_t *, struct zone *);
void  cpu_create_intrstat(cpu_t *);
void  cpu_delete_intrstat(cpu_t *);
int   cpu_kstat_intrstat_update(kstat_t *, int);
void  cpu_intr_swtch_enter(kthread_t *);
void  cpu_intr_swtch_exit(kthread_t *);

void  mbox_lock_init(void);    /* initialize cross-call locks */
void  mbox_init(int cpun);     /* initialize cross-calls */
void  poke_cpu(int cpun);      /* interrupt another CPU (to preempt) */

/*
 * values for safe_list.  Pause state that CPUs are in.
 */
#define     PAUSE_IDLE  0           /* normal state */
#define     PAUSE_READY 1           /* paused thread ready to spl */
#define     PAUSE_WAIT  2           /* paused thread is spl-ed high */
#define     PAUSE_DIE   3           /* tell pause thread to leave */
#define     PAUSE_DEAD  4           /* pause thread has left */

void  mach_cpu_pause(volatile char *);

void  pause_cpus(cpu_t *off_cp);
void  start_cpus(void);
int   cpus_paused(void);

void  cpu_pause_init(void);
cpu_t *cpu_get(processorid_t cpun); /* get the CPU struct associated */

int   cpu_online(cpu_t *cp);              /* take cpu online */
int   cpu_offline(cpu_t *cp, int flags);  /* take cpu offline */
int   cpu_spare(cpu_t *cp, int flags);    /* take cpu to spare */
int   cpu_faulted(cpu_t *cp, int flags);  /* take cpu to faulted */
int   cpu_poweron(cpu_t *cp);       /* take powered-off cpu to offline */
int   cpu_poweroff(cpu_t *cp);      /* take offline cpu to powered-off */

cpu_t *cpu_intr_next(cpu_t *cp);    /* get next online CPU taking intrs */
int   cpu_intr_count(cpu_t *cp);    /* count # of CPUs handling intrs */
int   cpu_intr_on(cpu_t *cp);       /* CPU taking I/O interrupts? */
void  cpu_intr_enable(cpu_t *cp);   /* enable I/O interrupts */
int   cpu_intr_disable(cpu_t *cp);  /* disable I/O interrupts */
void  cpu_intr_alloc(cpu_t *cp, int n); /* allocate interrupt threads */

/*
 * Routines for checking CPU states.
 */
int   cpu_is_online(cpu_t *);       /* check if CPU is online */
int   cpu_is_nointr(cpu_t *);       /* check if CPU can service intrs */
int   cpu_is_active(cpu_t *);       /* check if CPU can run threads */
int   cpu_is_offline(cpu_t *);      /* check if CPU is offline */
int   cpu_is_poweredoff(cpu_t *);   /* check if CPU is powered off */

int   cpu_flagged_online(cpu_flag_t);     /* flags show CPU is online */
int   cpu_flagged_nointr(cpu_flag_t);     /* flags show CPU not handling intrs */
int   cpu_flagged_active(cpu_flag_t); /* flags show CPU scheduling threads */
int   cpu_flagged_offline(cpu_flag_t); /* flags show CPU is offline */
int   cpu_flagged_poweredoff(cpu_flag_t); /* flags show CPU is powered off */

/*
 * The processor_info(2) state of a CPU is a simplified representation suitable
 * for use by an application program.  Kernel subsystems should utilize the
 * internal per-CPU state as given by the cpu_flags member of the cpu structure,
 * as this information may include platform- or architecture-specific state
 * critical to a subsystem's disposition of a particular CPU.
 */
void  cpu_set_state(cpu_t *);       /* record/timestamp current state */
int   cpu_get_state(cpu_t *);       /* get current cpu state */
const char *cpu_get_state_str(cpu_t *);   /* get current cpu state as string */


void  cpu_set_supp_freqs(cpu_t *, const char *); /* set the CPU supported */
                                    /* frequencies */

int   cpu_configure(int);
int   cpu_unconfigure(int);
void  cpu_destroy_bound_threads(cpu_t *cp);

extern int cpu_bind_thread(kthread_t *tp, processorid_t bind,
    processorid_t *obind, int *error);
extern int cpu_unbind(processorid_t cpu_id, boolean_t force);
extern void thread_affinity_set(kthread_t *t, int cpu_id);
extern void thread_affinity_clear(kthread_t *t);
extern void affinity_set(int cpu_id);
extern void affinity_clear(void);
extern void init_cpu_mstate(struct cpu *, int);
extern void term_cpu_mstate(struct cpu *);
extern void new_cpu_mstate(int, hrtime_t);
extern void get_cpu_mstate(struct cpu *, hrtime_t *);
extern void thread_nomigrate(void);
extern void thread_allowmigrate(void);
extern void weakbinding_stop(void);
extern void weakbinding_start(void);

/*
 * The following routines affect the CPUs participation in interrupt processing,
 * if that is applicable on the architecture.  This only affects interrupts
 * which aren't directed at the processor (not cross calls).
 *
 * cpu_disable_intr returns non-zero if interrupts were previously enabled.
 */
int   cpu_disable_intr(struct cpu *cp); /* stop issuing interrupts to cpu */
void  cpu_enable_intr(struct cpu *cp); /* start issuing interrupts to cpu */

/*
 * The mutex cpu_lock protects cpu_flags for all CPUs, as well as the ncpus
 * and ncpus_online counts.
 */
extern kmutex_t   cpu_lock;   /* lock protecting CPU data */

typedef enum {
      CPU_INIT,
      CPU_CONFIG,
      CPU_UNCONFIG,
      CPU_ON,
      CPU_OFF,
      CPU_CPUPART_IN,
      CPU_CPUPART_OUT
} cpu_setup_t;

typedef int cpu_setup_func_t(cpu_setup_t, int, void *);

/*
 * Routines used to register interest in cpu's being added to or removed
 * from the system.
 */
extern void register_cpu_setup_func(cpu_setup_func_t *, void *);
extern void unregister_cpu_setup_func(cpu_setup_func_t *, void *);
extern void cpu_state_change_notify(int, cpu_setup_t);

/*
 * Create various strings that describe the given CPU for the
 * processor_info system call and configuration-related kstats.
 */
#define     CPU_IDSTRLEN      100

extern void init_cpu_info(struct cpu *);
extern void populate_idstr(struct cpu *);
extern void cpu_vm_data_init(struct cpu *);
extern void cpu_vm_data_destroy(struct cpu *);

#endif      /* _KERNEL */

#ifdef      __cplusplus
}
#endif

#endif /* _SYS_CPUVAR_H */

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