| 1 | #ifndef GLO_H
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| 2 | #define GLO_H
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| 3 |
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| 4 | /* Global variables used in the kernel. This file contains the declarations;
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| 5 | * storage space for the variables is allocated in table.c, because EXTERN is
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| 6 | * defined as extern unless the _TABLE definition is seen. We rely on the
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| 7 | * compiler's default initialization (0) for several global variables.
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| 8 | */
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| 9 | #ifdef _TABLE
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| 10 | #undef EXTERN
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| 11 | #define EXTERN
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| 12 | #endif
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| 13 |
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| 14 | #include <minix/config.h>
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| 15 | #include "config.h"
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| 16 |
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| 17 | /* Variables relating to shutting down MINIX. */
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| 18 | EXTERN char kernel_exception; /* TRUE after system exceptions */
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| 19 | EXTERN char shutdown_started; /* TRUE after shutdowns / reboots */
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| 20 |
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| 21 | /* Kernel information structures. This groups vital kernel information. */
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| 22 | EXTERN phys_bytes aout; /* address of a.out headers */
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| 23 | EXTERN struct kinfo kinfo; /* kernel information for users */
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| 24 | EXTERN struct machine machine; /* machine information for users */
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| 25 | EXTERN struct kmessages kmess; /* diagnostic messages in kernel */
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| 26 | EXTERN struct randomness krandom; /* gather kernel random information */
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| 27 | EXTERN struct loadinfo kloadinfo; /* status of load average */
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| 28 |
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| 29 | /* Process scheduling information and the kernel reentry count. */
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| 30 | EXTERN struct proc *prev_ptr; /* previously running process */
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| 31 | EXTERN struct proc *proc_ptr; /* pointer to currently running process */
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| 32 | EXTERN struct proc *next_ptr; /* next process to run after restart() */
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| 33 | EXTERN struct proc *bill_ptr; /* process to bill for clock ticks */
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| 34 | EXTERN char k_reenter; /* kernel reentry count (entry count less 1) */
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| 35 | EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */
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| 36 |
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| 37 | #if (CHIP == INTEL)
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| 38 |
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| 39 | /* Interrupt related variables. */
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| 40 | EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS]; /* hooks for general use */
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| 41 | EXTERN irq_hook_t *irq_handlers[NR_IRQ_VECTORS];/* list of IRQ handlers */
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| 42 | EXTERN int irq_actids[NR_IRQ_VECTORS]; /* IRQ ID bits active */
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| 43 | EXTERN int irq_use; /* map of all in-use irq's */
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| 44 |
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| 45 | /* Miscellaneous. */
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| 46 | EXTERN reg_t mon_ss, mon_sp; /* boot monitor stack */
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| 47 | EXTERN int mon_return; /* true if we can return to monitor */
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| 48 | EXTERN int do_serial_debug;
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| 49 | EXTERN int who_e, who_p; /* message source endpoint and proc */
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| 50 |
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| 51 | /* VM */
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| 52 | EXTERN phys_bytes vm_base;
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| 53 | EXTERN phys_bytes vm_size;
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| 54 | EXTERN phys_bytes vm_mem_high;
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| 55 |
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| 56 | /* Variables that are initialized elsewhere are just extern here. */
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| 57 | extern struct boot_image image[]; /* system image processes */
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| 58 | extern char *t_stack[]; /* task stack space */
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| 59 | extern struct segdesc_s gdt[]; /* global descriptor table */
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| 60 |
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| 61 | EXTERN _PROTOTYPE( void (*level0_func), (void) );
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| 62 | #endif /* (CHIP == INTEL) */
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| 63 |
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| 64 | #if (CHIP == M68000)
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| 65 | /* M68000 specific variables go here. */
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| 66 | #endif
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| 67 |
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| 68 | #endif /* GLO_H */
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