minix/kernel/glo.h

88 lines
3.1 KiB
C

#ifndef GLO_H
#define GLO_H
/* Global variables used in the kernel. This file contains the declarations;
* storage space for the variables is allocated in table.c, because EXTERN is
* defined as extern unless the _TABLE definition is seen. We rely on the
* compiler's default initialization (0) for several global variables.
*/
#ifdef _TABLE
#undef EXTERN
#define EXTERN
#endif
#include <minix/config.h>
#include <archtypes.h>
#include "config.h"
#include "debug.h"
/* Variables relating to shutting down MINIX. */
EXTERN char kernel_exception; /* TRUE after system exceptions */
EXTERN char shutdown_started; /* TRUE after shutdowns / reboots */
/* Kernel information structures. This groups vital kernel information. */
EXTERN struct kinfo kinfo; /* kernel information for users */
EXTERN struct machine machine; /* machine information for users */
EXTERN struct kmessages kmess; /* diagnostic messages in kernel */
EXTERN struct k_randomness krandom; /* gather kernel random information */
EXTERN struct loadinfo kloadinfo; /* status of load average */
/* Process scheduling information and the kernel reentry count. */
EXTERN struct proc *proc_ptr; /* pointer to currently running process */
EXTERN struct proc *bill_ptr; /* process to bill for clock ticks */
EXTERN struct proc *vmrestart; /* first process on vmrestart queue */
EXTERN struct proc *vmrequest; /* first process on vmrequest queue */
EXTERN struct proc *pagefaults; /* first process on pagefault queue */
EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */
/* Interrupt related variables. */
EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS]; /* hooks for general use */
EXTERN int irq_actids[NR_IRQ_VECTORS]; /* IRQ ID bits active */
EXTERN int irq_use; /* map of all in-use irq's */
EXTERN u32_t system_hz; /* HZ value */
/* Miscellaneous. */
EXTERN reg_t mon_ss, mon_sp; /* boot monitor stack */
EXTERN int mon_return; /* true if we can return to monitor */
EXTERN int do_serial_debug;
EXTERN endpoint_t who_e; /* message source endpoint */
EXTERN int who_p; /* message source proc */
EXTERN int sys_call_code; /* kernel call number in SYSTEM */
EXTERN time_t boottime;
EXTERN char params_buffer[512]; /* boot monitor parameters */
EXTERN int minix_panicing;
EXTERN int locklevel;
EXTERN char fpu_presence;
EXTERN char osfxsr_feature; /* FXSAVE/FXRSTOR instructions support (SSEx) */
#define MAGICTEST 0xC0FFEE23
EXTERN u32_t magictest; /* global magic number */
#if DEBUG_TRACE
EXTERN int verboseflags;
#endif
#ifdef CONFIG_APIC
EXTERN int config_no_apic; /* optionaly turn off apic */
#endif
#ifdef CONFIG_IDLE_TSC
EXTERN u64_t idle_tsc;
EXTERN u64_t idle_stop;
EXTERN int idle_active;
#endif
/* VM */
EXTERN int vm_running;
EXTERN int catch_pagefaults;
EXTERN struct proc *ptproc;
/* Timing */
EXTERN util_timingdata_t timingdata[TIMING_CATEGORIES];
/* Variables that are initialized elsewhere are just extern here. */
extern struct boot_image image[]; /* system image processes */
extern char *t_stack[]; /* task stack space */
extern struct segdesc_s gdt[]; /* global descriptor table */
#endif /* GLO_H */