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 <machine/archtypes.h>
  16 #include "archconst.h"
  17 #include "config.h"
  18 #include "debug.h"
  19
  20 /* Kernel information structures. This groups vital kernel information. */
  21 EXTERN struct kinfo kinfo;              /* kernel information for users */
  22 EXTERN struct machine machine;          /* machine information for users */
  23 EXTERN struct kmessages kmess;          /* diagnostic messages in kernel */
  24 EXTERN struct k_randomness krandom;     /* gather kernel random information */
  25 EXTERN struct loadinfo kloadinfo;       /* status of load average */
  26
  27 /* Process scheduling information and the kernel reentry count. */
  28 EXTERN struct proc *proc_ptr;   /* pointer to currently running process */
  29 EXTERN struct proc *bill_ptr;   /* process to bill for clock ticks */
  30 EXTERN struct proc *vmrequest;  /* first process on vmrequest queue */
  31 EXTERN struct proc *pagefaults; /* first process on pagefault queue */
  32 EXTERN unsigned lost_ticks;     /* clock ticks counted outside clock task */
  33
  34
  35 /* Interrupt related variables. */
  36 EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS];      /* hooks for general use */
  37 EXTERN int irq_actids[NR_IRQ_VECTORS];          /* IRQ ID bits active */
  38 EXTERN int irq_use;                             /* map of all in-use irq's */
  39 EXTERN u32_t system_hz;                         /* HZ value */
  40
  41 /* Miscellaneous. */
  42 EXTERN reg_t mon_ss, mon_sp;            /* boot monitor stack */
  43 EXTERN int mon_return;                  /* true if we can return to monitor */
  44 EXTERN int do_serial_debug;
  45 EXTERN time_t boottime;
  46 EXTERN char params_buffer[512];         /* boot monitor parameters */
  47 EXTERN int minix_panicing;
  48 EXTERN int locklevel;
  49 EXTERN char fpu_presence;
  50 EXTERN char osfxsr_feature;             /* FXSAVE/FXRSTOR instructions support (SSEx) */
  51 EXTERN int verboseboot;                 /* verbose boot, init'ed in cstart */
  52 #define MAGICTEST 0xC0FFEE23
  53 EXTERN u32_t magictest;                 /* global magic number */
  54
  55 #if DEBUG_TRACE
  56 EXTERN int verboseflags;
  57 #endif
  58
  59 #ifdef CONFIG_APIC
  60 EXTERN int config_no_apic; /* optionaly turn off apic */
  61 #endif
  62
  63 EXTERN unsigned cpu_hz[CONFIG_MAX_CPUS];
  64
  65 #define cpu_set_freq(cpu, freq) do {cpu_hz[cpu] = freq;} while (0)
  66 #define cpu_get_freq(cpu)       cpu_hz[cpu]
  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 EXTERN volatile int serial_debug_active;
  82
  83 #endif /* GLO_H */