kernel/glo.h

   1 #ifndef GLO_H
   2 #define GLO_H
   3
   4 #include <minix/sysutil.h>
   5
   6 /* Global variables used in the kernel. This file contains the declarations;
   7  * storage space for the variables is allocated in table.c, because EXTERN is
   8  * defined as extern unless the _TABLE definition is seen. We rely on the
   9  * compiler's default initialization (0) for several global variables.
  10  */
  11 #ifdef _TABLE
  12 #undef EXTERN
  13 #define EXTERN
  14 #endif
  15
  16 #include <minix/config.h>
  17 #include <archtypes.h>
  18 #include "config.h"
  19 #include "debug.h"
  20
  21 /* Variables relating to shutting down MINIX. */
  22 EXTERN char kernel_exception;           /* TRUE after system exceptions */
  23 EXTERN char shutdown_started;           /* TRUE after shutdowns / reboots */
  24
  25 /* Kernel information structures. This groups vital kernel information. */
  26 EXTERN struct kinfo kinfo;              /* kernel information for users */
  27 EXTERN struct machine machine;          /* machine information for users */
  28 EXTERN struct kmessages kmess;          /* diagnostic messages in kernel */
  29 EXTERN struct k_randomness krandom;     /* gather kernel random information */
  30 EXTERN struct loadinfo kloadinfo;       /* status of load average */
  31
  32 /* Process scheduling information and the kernel reentry count. */
  33 EXTERN struct proc *proc_ptr;   /* pointer to currently running process */
  34 EXTERN struct proc *next_ptr;   /* next process to run after restart() */
  35 EXTERN struct proc *prev_ptr;
  36 EXTERN struct proc *bill_ptr;   /* process to bill for clock ticks */
  37 EXTERN struct proc *vmrestart;  /* first process on vmrestart queue */
  38 EXTERN struct proc *vmrequest;  /* first process on vmrequest queue */
  39 EXTERN struct proc *pagefaults; /* first process on pagefault queue */
  40 EXTERN char k_reenter;          /* kernel reentry count (entry count less 1) */
  41 EXTERN unsigned lost_ticks;     /* clock ticks counted outside clock task */
  42
  43
  44 /* Interrupt related variables. */
  45 EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS];      /* hooks for general use */
  46 EXTERN int irq_actids[NR_IRQ_VECTORS];          /* IRQ ID bits active */
  47 EXTERN int irq_use;                             /* map of all in-use irq's */
  48 EXTERN u32_t system_hz;                         /* HZ value */
  49
  50 /* Miscellaneous. */
  51 EXTERN reg_t mon_ss, mon_sp;            /* boot monitor stack */
  52 EXTERN int mon_return;                  /* true if we can return to monitor */
  53 EXTERN int do_serial_debug;
  54 EXTERN endpoint_t who_e;                /* message source endpoint */
  55 EXTERN int who_p;                       /* message source proc */
  56 EXTERN int sys_call_code;               /* kernel call number in SYSTEM */
  57 EXTERN time_t boottime;
  58 EXTERN char params_buffer[512];         /* boot monitor parameters */
  59 EXTERN int minix_panicing;
  60 EXTERN int locklevel;
  61 #define MAGICTEST 0xC0FFEE23
  62 EXTERN u32_t magictest;                 /* global magic number */
  63
  64 #if DEBUG_TRACE
  65 EXTERN int verboseflags;
  66 #endif
  67
  68 /* VM */
  69 EXTERN int vm_running;
  70 EXTERN int catch_pagefaults;
  71 EXTERN struct proc *ptproc;
  72
  73 /* Timing */
  74 EXTERN util_timingdata_t timingdata[TIMING_CATEGORIES];
  75
  76 /* Variables that are initialized elsewhere are just extern here. */
  77 extern struct boot_image image[];       /* system image processes */
  78 extern char *t_stack[];                 /* task stack space */
  79 extern struct segdesc_s gdt[];          /* global descriptor table */
  80
  81 #endif /* GLO_H */