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 <minix/ipcconst.h> 16 #include <machine/archtypes.h> 17 #include "archconst.h" 18 #include "config.h" 19 #include "debug.h" 20 21 /* Kernel information structures. This groups vital kernel information. */ 22 extern struct kinfo kinfo; /* kernel information for services */ 23 extern struct machine machine; /* machine info for services */ 24 extern struct kmessages kmessages; /* diagnostic messages in kernel */ 25 extern struct loadinfo loadinfo; /* status of load average */ 26 extern struct kuserinfo kuserinfo; /* kernel information for users */ 27 extern struct arm_frclock arm_frclock; /* ARM free-running timer info */ 28 extern struct kclockinfo kclockinfo; /* clock information */ 29 extern struct minix_kerninfo minix_kerninfo; 30 31 EXTERN struct k_randomness krandom; /* gather kernel random information */ 32 33 EXTERN vir_bytes minix_kerninfo_user; 34 35 #define kmess kmessages 36 #define kloadinfo loadinfo 37 38 #define system_hz (kclockinfo.hz) /* HZ value (alias) */ 39 40 /* Process scheduling information and the kernel reentry count. */ 41 EXTERN struct proc *vmrequest; /* first process on vmrequest queue */ 42 EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */ 43 EXTERN char *ipc_call_names[IPCNO_HIGHEST+1]; /* human-readable call names */ 44 EXTERN struct proc *kbill_kcall; /* process that made kernel call */ 45 EXTERN struct proc *kbill_ipc; /* process that invoked ipc */ 46 47 /* Interrupt related variables. */ 48 EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS]; /* hooks for general use */ 49 EXTERN int irq_actids[NR_IRQ_VECTORS]; /* IRQ ID bits active */ 50 EXTERN int irq_use; /* map of all in-use irq's */ 51 52 /* Miscellaneous. */ 53 EXTERN int verboseboot; /* verbose boot, init'ed in cstart */ 54 55 #if DEBUG_TRACE 56 EXTERN int verboseflags; 57 #endif 58 59 #ifdef USE_APIC 60 EXTERN int config_no_apic; /* optionally turn off apic */ 61 EXTERN int config_apic_timer_x; /* apic timer slowdown factor */ 62 #endif 63 64 EXTERN u64_t cpu_hz[CONFIG_MAX_CPUS]; 65 66 #define cpu_set_freq(cpu, freq) do {cpu_hz[cpu] = freq;} while (0) 67 #define cpu_get_freq(cpu) cpu_hz[cpu] 68 69 #ifdef CONFIG_SMP 70 EXTERN int config_no_smp; /* optionally turn off SMP */ 71 #endif 72 73 /* VM */ 74 EXTERN int vm_running; 75 EXTERN int catch_pagefaults; 76 EXTERN int kernel_may_alloc; 77 78 /* Variables that are initialized elsewhere are just extern here. */ 79 extern struct boot_image image[NR_BOOT_PROCS]; /* system image processes */ 80 81 EXTERN volatile int serial_debug_active; 82 83 EXTERN struct cpu_info cpu_info[CONFIG_MAX_CPUS]; 84 85 /* BKL stats */ 86 EXTERN u64_t kernel_ticks[CONFIG_MAX_CPUS]; 87 EXTERN u64_t bkl_ticks[CONFIG_MAX_CPUS]; 88 EXTERN unsigned bkl_tries[CONFIG_MAX_CPUS]; 89 EXTERN unsigned bkl_succ[CONFIG_MAX_CPUS]; 90 91 /* Feature flags */ 92 EXTERN int minix_feature_flags; 93 94 #endif /* GLO_H */ 95