FreeBSD/Linux Kernel Cross Reference
sys/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 "config.h"
16
17 /* Variables relating to shutting down MINIX. */
18 EXTERN char kernel_exception; /* TRUE after system exceptions */
19 EXTERN char shutdown_started; /* TRUE after shutdowns / reboots */
20
21 /* Kernel information structures. This groups vital kernel information. */
22 EXTERN phys_bytes aout; /* address of a.out headers */
23 EXTERN struct kinfo kinfo; /* kernel information for users */
24 EXTERN struct machine machine; /* machine information for users */
25 EXTERN struct kmessages kmess; /* diagnostic messages in kernel */
26 EXTERN struct randomness krandom; /* gather kernel random information */
27
28 /* Process scheduling information and the kernel reentry count. */
29 EXTERN struct proc *prev_ptr; /* previously running process */
30 EXTERN struct proc *proc_ptr; /* pointer to currently running process */
31 EXTERN struct proc *next_ptr; /* next process to run after restart() */
32 EXTERN struct proc *bill_ptr; /* process to bill for clock ticks */
33 EXTERN char k_reenter; /* kernel reentry count (entry count less 1) */
34 EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */
35
36 #if (CHIP == INTEL)
37
38 /* Interrupt related variables. */
39 EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS]; /* hooks for general use */
40 EXTERN irq_hook_t *irq_handlers[NR_IRQ_VECTORS];/* list of IRQ handlers */
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 /* Miscellaneous. */
45 EXTERN reg_t mon_ss, mon_sp; /* boot monitor stack */
46 EXTERN int mon_return; /* true if we can return to monitor */
47 EXTERN int do_serial_debug;
48
49 /* Variables that are initialized elsewhere are just extern here. */
50 extern struct boot_image image[]; /* system image processes */
51 extern char *t_stack[]; /* task stack space */
52 extern struct segdesc_s gdt[]; /* global descriptor table */
53
54 EXTERN _PROTOTYPE( void (*level0_func), (void) );
55 #endif /* (CHIP == INTEL) */
56
57 #if (CHIP == M68000)
58 /* M68000 specific variables go here. */
59 #endif
60
61 #endif /* GLO_H */
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