20054ae93f
Currently, the userland ABI uses a single field ('user_sp') far
into the very large 'kinfo' structure on the shared kernel
information page. This precludes us from modifying or getting
rid of 'kinfo' in the future without breaking userland. This
patch adds a separate 'kuserinfo' structure to the kernel
information page, with only information that is part of the
userland ABI, in an extensible manner. Userland now uses this
field if it is present, and falls back to the old field if not.
Change-Id: Ib7b24b53a440f40a2edc28cdfa48447ac2179288
95 lines
3 KiB
C
95 lines
3 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 services */
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extern struct machine machine; /* machine info for services */
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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 kuserinfo kuserinfo; /* kernel information for users */
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extern struct arm_frclock arm_frclock; /* ARM free-running timer info */
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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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