osfmk/i386/mp.h

   1 /*
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   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
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  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
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  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
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  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  23  * Please see the License for the specific language governing rights and
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  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56
  57 /*
  58  */
  59 #ifdef  KERNEL_PRIVATE
  60
  61 #ifndef _I386_MP_H_
  62 #define _I386_MP_H_
  63
  64 //#define       MP_DEBUG 1
  65
  66 #include <i386/apic.h>
  67 #include <i386/mp_events.h>
  68 #include <machine/limits.h>
  69
  70 #define MAX_CPUS        64              /* 8 * sizeof(cpumask_t) */
  71
  72 #ifndef ASSEMBLER
  73 #include <stdint.h>
  74 #include <sys/cdefs.h>
  75 #include <mach/boolean.h>
  76 #include <mach/kern_return.h>
  77 #include <mach/i386/thread_status.h>
  78 #include <mach/vm_types.h>
  79 #include <kern/simple_lock.h>
  80 #include <kern/assert.h>
  81
  82 __BEGIN_DECLS
  83
  84 extern kern_return_t intel_startCPU(int slot_num);
  85 extern kern_return_t intel_startCPU_fast(int slot_num);
  86 extern void i386_init_slave(void) __dead2;
  87 extern void i386_init_slave_fast(void) __dead2;
  88 extern void smp_init(void);
  89
  90 extern void cpu_interrupt(int cpu);
  91 __END_DECLS
  92
  93 extern  unsigned int    real_ncpus;             /* real number of cpus */
  94 extern  unsigned int    max_ncpus;              /* max number of cpus */
  95 decl_simple_lock_data(extern, kdb_lock); /* kdb lock            */
  96
  97 __BEGIN_DECLS
  98
  99 extern  void    console_init(void);
 100 extern  void    *console_cpu_alloc(boolean_t boot_cpu);
 101 extern  void    console_cpu_free(void *console_buf);
 102
 103 extern  int     kdb_cpu;                /* current cpu running kdb      */
 104 extern  int     kdb_debug;
 105 extern  int     kdb_active[];
 106
 107 extern  volatile boolean_t mp_kdp_trap;
 108 extern  volatile boolean_t mp_kdp_is_NMI;
 109 extern  volatile boolean_t force_immediate_debugger_NMI;
 110 extern  volatile boolean_t pmap_tlb_flush_timeout;
 111 extern  volatile usimple_lock_t spinlock_timed_out;
 112 extern  volatile uint32_t spinlock_owner_cpu;
 113 extern  uint32_t spinlock_timeout_NMI(uintptr_t thread_addr);
 114
 115 extern  uint64_t        LastDebuggerEntryAllowance;
 116
 117 extern  void      mp_kdp_enter(boolean_t proceed_on_failure);
 118 extern  void      mp_kdp_exit(void);
 119 extern  boolean_t mp_kdp_all_cpus_halted(void);
 120
 121 extern  boolean_t       mp_recent_debugger_activity(void);
 122 extern  void    kernel_spin(uint64_t spin_ns);
 123
 124 /*
 125  * All cpu rendezvous:
 126  */
 127 extern void mp_rendezvous(
 128         void (*setup_func)(void *),
 129         void (*action_func)(void *),
 130         void (*teardown_func)(void *),
 131         void *arg);
 132 extern void mp_rendezvous_no_intrs(
 133         void (*action_func)(void *),
 134         void *arg);
 135 extern void mp_rendezvous_break_lock(void);
 136 extern void mp_rendezvous_lock(void);
 137 extern void mp_rendezvous_unlock(void);
 138
 139 /*
 140  * All cpu broadcast.
 141  * Called from thread context, this blocks until all active cpus have
 142  * run action_func:
 143  */
 144 extern void mp_broadcast(
 145         void (*action_func)(void *),
 146         void *arg);
 147 #if MACH_KDP
 148 typedef long (*kdp_x86_xcpu_func_t) (void *arg0, void *arg1, uint16_t lcpu);
 149
 150 extern  long kdp_x86_xcpu_invoke(const uint16_t lcpu,
 151     kdp_x86_xcpu_func_t func,
 152     void *arg0, void *arg1);
 153 typedef enum    {KDP_XCPU_NONE = 0xffff, KDP_CURRENT_LCPU = 0xfffe} kdp_cpu_t;
 154 #endif
 155
 156 typedef uint32_t cpu_t;
 157 typedef volatile uint64_t cpumask_t;
 158
 159 static_assert(sizeof(cpumask_t) * CHAR_BIT >= MAX_CPUS, "cpumask_t bitvector is too small for current MAX_CPUS value");
 160
 161 static inline cpumask_t
 162 cpu_to_cpumask(cpu_t cpu)
 163 {
 164         return (cpu < MAX_CPUS) ? (1ULL << cpu) : 0;
 165 }
 166 #define CPUMASK_ALL     0xffffffffffffffffULL
 167 #define CPUMASK_SELF    cpu_to_cpumask(cpu_number())
 168 #define CPUMASK_OTHERS  (CPUMASK_ALL & ~CPUMASK_SELF)
 169
 170 /* Initialation routing called at processor registration */
 171 extern void mp_cpus_call_cpu_init(int cpu);
 172
 173 /*
 174  * Invoke a function (possibly NULL) on a set of cpus specified by a mask.
 175  * The mask may include the local cpu.
 176  * If the mode is:
 177  *      - ASYNC:  other cpus make their calls in parallel
 178  *      - SYNC:   the calls are performed serially in logical cpu order
 179  *      - NOSYNC: the calls are queued
 180  * Unless the mode is NOSYNC, mp_cpus_call() returns when the function has been
 181  * called on all specified cpus.
 182  * The return value is the number of cpus where the call was made or queued.
 183  * The action function is called with interrupts disabled.
 184  */
 185 extern cpu_t mp_cpus_call(
 186         cpumask_t       cpus,
 187         mp_sync_t       mode,
 188         void            (*action_func)(void *),
 189         void            *arg);
 190 extern cpu_t mp_cpus_call1(
 191         cpumask_t       cpus,
 192         mp_sync_t       mode,
 193         void            (*action_func)(void *, void*),
 194         void            *arg0,
 195         void            *arg1,
 196         cpumask_t       *cpus_calledp);
 197
 198 typedef enum {
 199         NONE = 0,
 200         SPINLOCK_TIMEOUT,
 201         TLB_FLUSH_TIMEOUT,
 202         CROSSCALL_TIMEOUT,
 203         INTERRUPT_WATCHDOG
 204 } NMI_reason_t;
 205 extern void NMIPI_panic(cpumask_t cpus, NMI_reason_t reason);
 206
 207 /* Interrupt a set of cpus, forcing an exit out of non-root mode */
 208 extern void mp_cpus_kick(cpumask_t cpus);
 209 /*
 210  * Power-management-specific SPI to:
 211  *  - register a callout function, and
 212  *  - request the callout (if registered) on a given cpu.
 213  */
 214 extern void PM_interrupt_register(void (*fn)(void));
 215 extern void cpu_PM_interrupt(int cpu);
 216
 217 __END_DECLS
 218
 219 #if MP_DEBUG
 220 typedef struct {
 221         uint64_t        time;
 222         int             cpu;
 223         mp_event_t      event;
 224 } cpu_signal_event_t;
 225
 226 #define LOG_NENTRIES    100
 227 typedef struct {
 228         uint64_t                count[MP_LAST];
 229         int                     next_entry;
 230         cpu_signal_event_t      entry[LOG_NENTRIES];
 231 } cpu_signal_event_log_t;
 232
 233 extern cpu_signal_event_log_t   *cpu_signal[];
 234 extern cpu_signal_event_log_t   *cpu_handle[];
 235
 236 #define DBGLOG(log, _cpu, _event) {                                     \
 237         boolean_t               spl = ml_set_interrupts_enabled(FALSE); \
 238         cpu_signal_event_log_t  *logp = log[cpu_number()];              \
 239         int                     next = logp->next_entry;                \
 240         cpu_signal_event_t      *eventp = &logp->entry[next];           \
 241                                                                         \
 242         logp->count[_event]++;                                          \
 243                                                                         \
 244         eventp->time = rdtsc64();                                       \
 245         eventp->cpu = _cpu;                                             \
 246         eventp->event = _event;                                         \
 247         if (next == (LOG_NENTRIES - 1))                                 \
 248                 logp->next_entry = 0;                                   \
 249         else                                                            \
 250                 logp->next_entry++;                                     \
 251                                                                         \
 252         (void) ml_set_interrupts_enabled(spl);                          \
 253 }
 254
 255 #define DBGLOG_CPU_INIT(cpu)    {                                       \
 256         cpu_signal_event_log_t  **sig_logpp = &cpu_signal[cpu];         \
 257         cpu_signal_event_log_t  **hdl_logpp = &cpu_handle[cpu];         \
 258                                                                         \
 259         if (*sig_logpp == NULL &&                                       \
 260                 kmem_alloc(kernel_map,                                  \
 261                         (vm_offset_t *) sig_logpp,                      \
 262                         sizeof(cpu_signal_event_log_t)) != KERN_SUCCESS)\
 263                 panic("DBGLOG_CPU_INIT cpu_signal allocation failed\n");\
 264         bzero(*sig_logpp, sizeof(cpu_signal_event_log_t));              \
 265         if (*hdl_logpp == NULL &&                                       \
 266                 kmem_alloc(kernel_map,                                  \
 267                         (vm_offset_t *) hdl_logpp,                      \
 268                         sizeof(cpu_signal_event_log_t)) != KERN_SUCCESS)\
 269                 panic("DBGLOG_CPU_INIT cpu_handle allocation failed\n");\
 270         bzero(*hdl_logpp, sizeof(cpu_signal_event_log_t));              \
 271 }
 272 #else   /* MP_DEBUG */
 273 #define DBGLOG(log, _cpu, _event)
 274 #define DBGLOG_CPU_INIT(cpu)
 275 #endif  /* MP_DEBUG */
 276
 277 #endif  /* ASSEMBLER */
 278
 279 #ifdef ASSEMBLER
 280 #define i_bit(bit, word)        ((long)(*(word)) & (1L << (bit)))
 281 #else
 282 __attribute__((always_inline)) static inline long
 283 i_bit_impl(long word, long bit)
 284 {
 285         long bitmask = 1L << bit;
 286         return word & bitmask;
 287 }
 288 #define i_bit(bit, word)        i_bit_impl((long)(*(word)), bit)
 289 #endif
 290
 291
 292 #endif /* _I386_MP_H_ */
 293
 294 #endif /* KERNEL_PRIVATE */