The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/smp.h

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    1 /*
    2  * ----------------------------------------------------------------------------
    3  * "THE BEER-WARE LICENSE" (Revision 42):
    4  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
    5  * can do whatever you want with this stuff. If we meet some day, and you think
    6  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
    7  * ----------------------------------------------------------------------------
    8  *
    9  * $FreeBSD: stable/4/sys/i386/include/smp.h 147509 2005-06-20 21:42:03Z ps $
   10  *
   11  */
   12 
   13 #ifndef _MACHINE_SMP_H_
   14 #define _MACHINE_SMP_H_
   15 
   16 #ifdef _KERNEL
   17 
   18 #if defined(SMP) && !defined(APIC_IO)
   19 # error APIC_IO required for SMP, add "options APIC_IO" to your config file.
   20 #endif /* SMP && !APIC_IO */
   21 
   22 #if defined(SMP) || defined(APIC_IO)
   23 
   24 #ifndef LOCORE
   25 
   26 /*
   27  * For sending values to POST displays.
   28  * XXX FIXME: where does this really belong, isa.h/isa.c perhaps?
   29  */
   30 extern int current_postcode;  /** XXX currently in mp_machdep.c */
   31 #define POSTCODE(X)     current_postcode = (X), \
   32                         outb(0x80, current_postcode)
   33 #define POSTCODE_LO(X)  current_postcode &= 0xf0, \
   34                         current_postcode |= ((X) & 0x0f), \
   35                         outb(0x80, current_postcode)
   36 #define POSTCODE_HI(X)  current_postcode &= 0x0f, \
   37                         current_postcode |= (((X) << 4) & 0xf0), \
   38                         outb(0x80, current_postcode)
   39 
   40 
   41 #include <machine/apic.h>
   42 
   43 /* global data in mpboot.s */
   44 extern int                      bootMP_size;
   45 
   46 /* functions in mpboot.s */
   47 void    bootMP                  __P((void));
   48 
   49 /* global data in mplock.s */
   50 extern u_int                    mp_lock;
   51 extern u_int                    isr_lock;
   52 #ifdef RECURSIVE_MPINTRLOCK
   53 extern u_int                    mpintr_lock;
   54 #endif /*  RECURSIVE_MPINTRLOCK */
   55 
   56 /* functions in mplock.s */
   57 void    get_mplock              __P((void));
   58 void    rel_mplock              __P((void));
   59 int             try_mplock              __P((void));
   60 #ifdef RECURSIVE_MPINTRLOCK
   61 void    get_mpintrlock          __P((void));
   62 void    rel_mpintrlock          __P((void));
   63 int             try_mpintrlock          __P((void));
   64 #endif /*  RECURSIVE_MPINTRLOCK */
   65 
   66 /* global data in apic_vector.s */
   67 extern volatile u_int           stopped_cpus;
   68 extern volatile u_int           started_cpus;
   69 
   70 extern volatile u_int           checkstate_probed_cpus;
   71 extern volatile u_int           checkstate_need_ast;
   72 extern volatile u_int           resched_cpus;
   73 extern void (*cpustop_restartfunc) __P((void));
   74 
   75 /* functions in apic_ipl.s */
   76 void    apic_eoi                __P((void));
   77 u_int   io_apic_read            __P((int, int));
   78 void    io_apic_write           __P((int, int, u_int));
   79 
   80 /* global data in mp_machdep.c */
   81 extern int                      bsp_apic_ready;
   82 extern int                      mp_ncpus;
   83 extern int                      mp_naps;
   84 extern int                      mp_nbusses;
   85 extern int                      mp_napics;
   86 extern int                      mp_picmode;
   87 extern int                      boot_cpu_id;
   88 extern vm_offset_t              cpu_apic_address;
   89 extern vm_offset_t              io_apic_address[];
   90 extern u_int32_t                cpu_apic_versions[];
   91 extern u_int32_t                *io_apic_versions;
   92 extern int                      cpu_num_to_apic_id[];
   93 extern int                      io_num_to_apic_id[];
   94 extern int                      apic_id_to_logical[];
   95 #define APIC_INTMAPSIZE 24
   96 struct apic_intmapinfo {
   97         int ioapic;
   98         int int_pin;
   99         volatile void *apic_address;
  100         int redirindex;
  101 };
  102 extern struct apic_intmapinfo   int_to_apicintpin[];
  103 extern u_int                    all_cpus;
  104 extern struct pcb               stoppcbs[];
  105 
  106 /* functions in mp_machdep.c */
  107 u_int   mp_bootaddress          __P((u_int));
  108 int     mp_probe                __P((void));
  109 void    mp_start                __P((void));
  110 void    mp_announce             __P((void));
  111 u_int   isa_apic_mask           __P((u_int));
  112 int     isa_apic_irq            __P((int));
  113 int     pci_apic_irq            __P((int, int, int, void *));
  114 int     apic_irq                __P((int, int));
  115 int     next_apic_irq           __P((int));
  116 int     undirect_isa_irq        __P((int));
  117 int     undirect_pci_irq        __P((int));
  118 int     apic_bus_type           __P((int));
  119 int     apic_src_bus_id         __P((int, int));
  120 int     apic_src_bus_irq        __P((int, int));
  121 int     apic_int_type           __P((int, int));
  122 int     apic_trigger            __P((int, int));
  123 int     apic_polarity           __P((int, int));
  124 int     mp_grab_cpu_hlt         __P((void));
  125 void    assign_apic_irq         __P((int apic, int intpin, int irq));
  126 void    revoke_apic_irq         __P((int irq));
  127 void    bsp_apic_configure      __P((void));
  128 void    init_secondary          __P((void));
  129 void    smp_invltlb             __P((void));
  130 int     stop_cpus               __P((u_int));
  131 int     restart_cpus            __P((u_int));
  132 #ifdef BETTER_CLOCK 
  133 void    forward_statclock       __P((int pscnt));
  134 void    forward_hardclock       __P((int pscnt));
  135 #endif /* BETTER_CLOCK */
  136 void    forward_signal          __P((struct proc *));
  137 void    forward_roundrobin      __P((void));
  138 #ifdef  APIC_INTR_REORDER
  139 void    set_lapic_isrloc        __P((int, int));
  140 #endif /* APIC_INTR_REORDER */
  141 void    smp_rendezvous_action   __P((void));
  142 void    smp_rendezvous          __P((void (*)(void *), 
  143                                      void (*)(void *),
  144                                      void (*)(void *),
  145                                      void *arg));
  146 
  147 /* global data in mpapic.c */
  148 extern volatile lapic_t         lapic;
  149 extern volatile ioapic_t        **ioapic;
  150 
  151 /* functions in mpapic.c */
  152 void    apic_dump               __P((char*));
  153 void    apic_initialize         __P((void));
  154 void    imen_dump               __P((void));
  155 int     apic_ipi                __P((int, int, int));
  156 int     selected_apic_ipi       __P((u_int, int, int));
  157 int     io_apic_setup           __P((int));
  158 void    io_apic_setup_intpin    __P((int, int));
  159 void    io_apic_set_id          __P((int, int));
  160 int     io_apic_get_id          __P((int));
  161 int     ext_int_setup           __P((int, int));
  162 
  163 #if defined(READY)
  164 void    clr_io_apic_mask24      __P((int, u_int32_t));
  165 void    set_io_apic_mask24      __P((int, u_int32_t));
  166 #endif /* READY */
  167 
  168 void    set_apic_timer          __P((int));
  169 int     read_apic_timer         __P((void));
  170 void    u_sleep                 __P((int));
  171 
  172 /* global data in init_smp.c */
  173 extern int                      invltlb_ok;
  174 extern int                      smp_active;
  175 extern int                      smp_started;
  176 extern volatile int             smp_idle_loops;
  177 
  178 #endif /* !LOCORE */
  179 #else   /* !SMP && !APIC_IO */
  180 
  181 /*
  182  * Create dummy MP lock empties
  183  */
  184 
  185 static __inline void
  186 get_mplock(void)
  187 {
  188 }
  189 
  190 static __inline void
  191 rel_mplock(void)
  192 {
  193 }
  194 
  195 #endif
  196 
  197 #endif /* _KERNEL */
  198 #endif /* _MACHINE_SMP_H_ */

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