kernel/glo.h

   1 #ifndef GLO_H
   2 #define GLO_H
   3
   4 /* Global variables used in the kernel. This file contains the declarations;
   5  * storage space for the variables is allocated in table.c, because EXTERN is
   6  * defined as extern unless the _TABLE definition is seen. We rely on the
   7  * compiler's default initialization (0) for several global variables.
   8  */
   9 #ifdef _TABLE
  10 #undef EXTERN
  11 #define EXTERN
  12 #endif
  13
  14 #include <minix/config.h>
  15 #include <archtypes.h>
  16 #include "config.h"
  17
  18 /* Variables relating to shutting down MINIX. */
  19 EXTERN char kernel_exception;           /* TRUE after system exceptions */
  20 EXTERN char shutdown_started;           /* TRUE after shutdowns / reboots */
  21
  22 /* Kernel information structures. This groups vital kernel information. */
  23 EXTERN phys_bytes aout;                 /* address of a.out headers */
  24 EXTERN struct kinfo kinfo;              /* kernel information for users */
  25 EXTERN struct machine machine;          /* machine information for users */
  26 EXTERN struct kmessages kmess;          /* diagnostic messages in kernel */
  27 EXTERN struct randomness krandom;       /* gather kernel random information */
  28 EXTERN struct loadinfo kloadinfo;       /* status of load average */
  29
  30 /* Process scheduling information and the kernel reentry count. */
  31 EXTERN struct proc *prev_ptr;   /* previously running process */
  32 EXTERN struct proc *proc_ptr;   /* pointer to currently running process */
  33 EXTERN struct proc *next_ptr;   /* next process to run after restart() */
  34 EXTERN struct proc *bill_ptr;   /* process to bill for clock ticks */
  35 EXTERN char k_reenter;          /* kernel reentry count (entry count less 1) */
  36 EXTERN unsigned lost_ticks;     /* clock ticks counted outside clock task */
  37
  38
  39 /* Interrupt related variables. */
  40 EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS];      /* hooks for general use */
  41 EXTERN int irq_actids[NR_IRQ_VECTORS];          /* IRQ ID bits active */
  42 EXTERN int irq_use;                             /* map of all in-use irq's */
  43
  44 EXTERN struct ipc_stats
  45 {
  46         unsigned long deadproc;
  47         unsigned long bad_endpoint;
  48         unsigned long dst_not_allowed;
  49         unsigned long bad_call;
  50         unsigned long call_not_allowed;
  51         unsigned long bad_buffer;
  52         unsigned long deadlock;
  53         unsigned long not_ready;
  54         unsigned long src_died;
  55         unsigned long dst_died;
  56         unsigned long no_priv;
  57         unsigned long bad_size;
  58         unsigned long bad_senda;
  59         u64_t total;
  60 } ipc_stats;
  61 extern endpoint_t ipc_stats_target;
  62
  63 EXTERN struct system_stats
  64 {
  65         unsigned long bad_req;
  66         unsigned long not_allowed;
  67         u64_t total;
  68 } sys_stats;
  69
  70 /* Miscellaneous. */
  71 EXTERN reg_t mon_ss, mon_sp;            /* boot monitor stack */
  72 EXTERN int mon_return;                  /* true if we can return to monitor */
  73 EXTERN int do_serial_debug;
  74 EXTERN endpoint_t who_e;                /* message source endpoint */
  75 EXTERN int who_p;                       /* message source proc */
  76 EXTERN int sys_call_code;               /* kernel call number in SYSTEM */
  77 EXTERN time_t boottime;
  78
  79 /* VM */
  80 EXTERN phys_bytes vm_base;
  81 EXTERN phys_bytes vm_size;
  82 EXTERN phys_bytes vm_mem_high;
  83
  84 /* Variables that are initialized elsewhere are just extern here. */
  85 extern struct boot_image image[];       /* system image processes */
  86 extern char *t_stack[];                 /* task stack space */
  87 extern struct segdesc_s gdt[];          /* global descriptor table */
  88
  89 EXTERN _PROTOTYPE( void (*level0_func), (void) );
  90
  91 #endif /* GLO_H */