#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 #include "config.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 phys_bytes aout; /* address of a.out headers */ 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 randomness krandom; /* gather kernel random information */ /* Process scheduling information and the kernel reentry count. */ EXTERN struct proc *prev_ptr; /* previously running process */ EXTERN struct proc *proc_ptr; /* pointer to currently running process */ EXTERN struct proc *next_ptr; /* next process to run after restart() */ EXTERN struct proc *bill_ptr; /* process to bill for clock ticks */ EXTERN char k_reenter; /* kernel reentry count (entry count less 1) */ 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 irq_hook_t *irq_handlers[NR_IRQ_VECTORS];/* list of IRQ handlers */ EXTERN int irq_actids[NR_IRQ_VECTORS]; /* IRQ ID bits active */ EXTERN int irq_use; /* map of all in-use irq's */ /* Miscellaneous. */ EXTERN reg_t mon_ss, mon_sp; /* boot monitor stack */ EXTERN int mon_return; /* true if we can return to monitor */ /* 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 */ EXTERN _PROTOTYPE( void (*level0_func), (void) ); #endif /* GLO_H */