minix/kernel/glo.h
Jorrit Herder e0a98a4d65 * Fixed bug relating to nested locking in interrupt handlers. The nested lock
caused interrupts to be reenabled (due to unlock), which caused a race. The
problems were especially visible on slower machines.
* Relocated free memory parsing to process manager. This saved quite some
code at the kernel level. Text size was reduced by about 650 bytes.
* Removed locks for updating the realtime in the clock's main loop and the
get_uptime function. Interrupts are no longer reentrant, so realtime is
immediately updated.
2005-06-17 09:09:54 +00:00

65 lines
2.6 KiB
C
Executable file

/* 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>
/* Variables relating to shutting down MINIX. */
EXTERN char kernel_exception; /* TRUE after system exceptions */
EXTERN char shutting_down; /* TRUE if shutting down */
EXTERN struct proc *shutdown_process; /* process awaiting shutdown of */
EXTERN timer_t shutdown_timer; /* timer for watchdog function */
/* 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 *proc_ptr; /* pointer to currently running process */
EXTERN struct proc *next_ptr; /* pointer to next process to run */
EXTERN char k_reenter; /* kernel reentry count (entry count less 1) */
EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */
/* Declare buffer space and a bit map for notification messages. */
EXTERN struct notification notify_buffer[NR_NOTIFY_BUFS];
EXTERN bitchunk_t notify_bitmap[BITMAP_CHUNKS(NR_NOTIFY_BUFS)];
#if (CHIP == INTEL)
/* 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 */
/* Data structure to store lock() timing data. */
#if ENABLE_LOCK_TIMING
EXTERN struct lock_timedata timingdata[TIMING_CATEGORIES];
#endif
/* 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 system_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 /* (CHIP == INTEL) */
#if (CHIP == M68000)
/* M68000 specific variables go here. */
#endif