d91f738bd8
Please note that this information is for use by system services only! The clock facility is not ready to be used directly by userland, and thus, this kernel page extension is NOT part of the userland ABI. For service programmers' convenience, change the prototype of the getticks(3) to return the uptime clock value directly, since the call can no longer fail. Correct the sys_times(2) reply message to use the right field type for the boot time. Restructure the kernel internals a bit so as to have all the clock stuff closer together. Change-Id: Ifc050b7bd253aecbe46e3bd7d7cc75bd86e45555
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
#ifndef GLO_H
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#define GLO_H
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/* Global variables used in the kernel. This file contains the declarations;
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* storage space for the variables is allocated in table.c, because EXTERN is
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* defined as extern unless the _TABLE definition is seen. We rely on the
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* compiler's default initialization (0) for several global variables.
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*/
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#ifdef _TABLE
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#undef EXTERN
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#define EXTERN
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#endif
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#include <minix/config.h>
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#include <minix/ipcconst.h>
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#include <machine/archtypes.h>
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#include "archconst.h"
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#include "config.h"
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#include "debug.h"
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/* Kernel information structures. This groups vital kernel information. */
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extern struct kinfo kinfo; /* kernel information for users */
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extern struct machine machine; /* machine information for users */
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extern struct kmessages kmessages; /* diagnostic messages in kernel */
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extern struct loadinfo loadinfo; /* status of load average */
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extern struct kclockinfo kclockinfo; /* clock information */
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extern struct minix_kerninfo minix_kerninfo;
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EXTERN struct k_randomness krandom; /* gather kernel random information */
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EXTERN vir_bytes minix_kerninfo_user;
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#define kmess kmessages
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#define kloadinfo loadinfo
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#define system_hz (kclockinfo.hz) /* HZ value (alias) */
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/* Process scheduling information and the kernel reentry count. */
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EXTERN struct proc *vmrequest; /* first process on vmrequest queue */
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EXTERN unsigned lost_ticks; /* clock ticks counted outside clock task */
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EXTERN char *ipc_call_names[IPCNO_HIGHEST+1]; /* human-readable call names */
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EXTERN struct proc *kbill_kcall; /* process that made kernel call */
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EXTERN struct proc *kbill_ipc; /* process that invoked ipc */
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/* Interrupt related variables. */
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EXTERN irq_hook_t irq_hooks[NR_IRQ_HOOKS]; /* hooks for general use */
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EXTERN int irq_actids[NR_IRQ_VECTORS]; /* IRQ ID bits active */
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EXTERN int irq_use; /* map of all in-use irq's */
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/* Miscellaneous. */
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EXTERN int verboseboot; /* verbose boot, init'ed in cstart */
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#if DEBUG_TRACE
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EXTERN int verboseflags;
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#endif
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#ifdef USE_APIC
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EXTERN int config_no_apic; /* optionally turn off apic */
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EXTERN int config_apic_timer_x; /* apic timer slowdown factor */
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#endif
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EXTERN u64_t cpu_hz[CONFIG_MAX_CPUS];
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#define cpu_set_freq(cpu, freq) do {cpu_hz[cpu] = freq;} while (0)
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#define cpu_get_freq(cpu) cpu_hz[cpu]
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#ifdef CONFIG_SMP
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EXTERN int config_no_smp; /* optionally turn off SMP */
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#endif
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/* VM */
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EXTERN int vm_running;
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EXTERN int catch_pagefaults;
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EXTERN int kernel_may_alloc;
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/* Variables that are initialized elsewhere are just extern here. */
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extern struct boot_image image[NR_BOOT_PROCS]; /* system image processes */
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EXTERN volatile int serial_debug_active;
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EXTERN struct cpu_info cpu_info[CONFIG_MAX_CPUS];
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/* BKL stats */
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EXTERN u64_t kernel_ticks[CONFIG_MAX_CPUS];
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EXTERN u64_t bkl_ticks[CONFIG_MAX_CPUS];
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EXTERN unsigned bkl_tries[CONFIG_MAX_CPUS];
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EXTERN unsigned bkl_succ[CONFIG_MAX_CPUS];
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/* Feature flags */
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EXTERN int minix_feature_flags;
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#endif /* GLO_H */
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