453 lines
16 KiB
C
453 lines
16 KiB
C
/*-
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* Copyright (c) 1982, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)systm.h 8.7 (Berkeley) 3/29/95
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* $FreeBSD$
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*/
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#ifndef _SYS_SYSTM_H_
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#define _SYS_SYSTM_H_
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#include <machine/atomic.h>
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#include <machine/cpufunc.h>
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#include <sys/callout.h>
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#include <sys/cdefs.h>
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#include <sys/queue.h>
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#include <sys/stdint.h> /* for people using printf mainly */
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extern int cold; /* nonzero if we are doing a cold boot */
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extern int suspend_blocked; /* block suspend due to pending shutdown */
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extern int rebooting; /* kern_reboot() has been called. */
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extern const char *panicstr; /* panic message */
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extern char version[]; /* system version */
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extern char compiler_version[]; /* compiler version */
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extern char copyright[]; /* system copyright */
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extern int kstack_pages; /* number of kernel stack pages */
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extern u_long pagesizes[]; /* supported page sizes */
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extern long physmem; /* physical memory */
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extern long realmem; /* 'real' memory */
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extern char *rootdevnames[2]; /* names of possible root devices */
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extern int boothowto; /* reboot flags, from console subsystem */
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extern int bootverbose; /* nonzero to print verbose messages */
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extern int maxusers; /* system tune hint */
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extern int ngroups_max; /* max # of supplemental groups */
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extern int vm_guest; /* Running as virtual machine guest? */
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/*
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* Detected virtual machine guest types. The intention is to expand
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* and/or add to the VM_GUEST_VM type if specific VM functionality is
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* ever implemented (e.g. vendor-specific paravirtualization features).
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* Keep in sync with vm_guest_sysctl_names[].
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*/
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enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
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VM_GUEST_VMWARE, VM_LAST };
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#if defined(WITNESS) || defined(INVARIANT_SUPPORT)
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void kassert_panic(const char *fmt, ...) __printflike(1, 2);
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#endif
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#ifdef INVARIANTS /* The option is always available */
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#define KASSERT(exp,msg) do { \
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if (__predict_false(!(exp))) \
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kassert_panic msg; \
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} while (0)
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#define VNASSERT(exp, vp, msg) do { \
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if (__predict_false(!(exp))) { \
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vn_printf(vp, "VNASSERT failed\n"); \
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kassert_panic msg; \
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} \
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} while (0)
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#else
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#define KASSERT(exp,msg) do { \
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} while (0)
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#define VNASSERT(exp, vp, msg) do { \
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} while (0)
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#endif
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#ifndef CTASSERT /* Allow lint to override */
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#define CTASSERT(x) _Static_assert(x, "compile-time assertion failed")
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#endif
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/*
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* Assert that a pointer can be loaded from memory atomically.
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*
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* This assertion enforces stronger alignment than necessary. For example,
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* on some architectures, atomicity for unaligned loads will depend on
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* whether or not the load spans multiple cache lines.
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*/
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#define ASSERT_ATOMIC_LOAD_PTR(var, msg) \
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KASSERT(sizeof(var) == sizeof(void *) && \
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((uintptr_t)&(var) & (sizeof(void *) - 1)) == 0, msg)
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/*
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* Assert that a thread is in critical(9) section.
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*/
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#define CRITICAL_ASSERT(td) \
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KASSERT((td)->td_critnest >= 1, ("Not in critical section"));
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/*
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* If we have already panic'd and this is the thread that called
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* panic(), then don't block on any mutexes but silently succeed.
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* Otherwise, the kernel will deadlock since the scheduler isn't
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* going to run the thread that holds any lock we need.
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*/
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#define SCHEDULER_STOPPED() __predict_false(curthread->td_stopsched)
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/*
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* XXX the hints declarations are even more misplaced than most declarations
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* in this file, since they are needed in one file (per arch) and only used
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* in two files.
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* XXX most of these variables should be const.
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*/
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extern int osreldate;
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extern int envmode;
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extern int hintmode; /* 0 = off. 1 = config, 2 = fallback */
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extern int dynamic_kenv;
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extern struct mtx kenv_lock;
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extern char *kern_envp;
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extern char static_env[];
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extern char static_hints[]; /* by config for now */
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extern char **kenvp;
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extern const void *zero_region; /* address space maps to a zeroed page */
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extern int unmapped_buf_allowed;
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#ifdef __LP64__
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#define IOSIZE_MAX iosize_max()
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#define DEVFS_IOSIZE_MAX devfs_iosize_max()
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#else
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#define IOSIZE_MAX SSIZE_MAX
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#define DEVFS_IOSIZE_MAX SSIZE_MAX
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#endif
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/*
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* General function declarations.
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*/
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struct inpcb;
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struct lock_object;
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struct malloc_type;
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struct mtx;
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struct proc;
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struct socket;
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struct thread;
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struct tty;
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struct ucred;
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struct uio;
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struct _jmp_buf;
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struct trapframe;
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struct eventtimer;
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int setjmp(struct _jmp_buf *) __returns_twice;
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void longjmp(struct _jmp_buf *, int) __dead2;
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int dumpstatus(vm_offset_t addr, off_t count);
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int nullop(void);
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int eopnotsupp(void);
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int ureadc(int, struct uio *);
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void hashdestroy(void *, struct malloc_type *, u_long);
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void *hashinit(int count, struct malloc_type *type, u_long *hashmask);
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void *hashinit_flags(int count, struct malloc_type *type,
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u_long *hashmask, int flags);
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#define HASH_NOWAIT 0x00000001
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#define HASH_WAITOK 0x00000002
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void *phashinit(int count, struct malloc_type *type, u_long *nentries);
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void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
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int flags);
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void g_waitidle(void);
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void panic(const char *, ...) __dead2 __printflike(1, 2);
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void vpanic(const char *, __va_list) __dead2 __printflike(1, 0);
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void cpu_boot(int);
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void cpu_flush_dcache(void *, size_t);
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void cpu_rootconf(void);
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void critical_enter(void);
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void critical_exit(void);
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void init_param1(void);
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void init_param2(long physpages);
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void init_static_kenv(char *, size_t);
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void tablefull(const char *);
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#ifdef EARLY_PRINTF
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typedef void early_putc_t(int ch);
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extern early_putc_t *early_putc;
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#endif
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int kvprintf(char const *, void (*)(int, void*), void *, int,
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__va_list) __printflike(1, 0);
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void log(int, const char *, ...) __printflike(2, 3);
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void log_console(struct uio *);
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void vlog(int, const char *, __va_list) __printflike(2, 0);
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int asprintf(char **ret, struct malloc_type *mtp, const char *format,
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...) __printflike(3, 4);
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int printf(const char *, ...) __printflike(1, 2);
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int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
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int sprintf(char *buf, const char *, ...) __printflike(2, 3);
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int uprintf(const char *, ...) __printflike(1, 2);
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int vprintf(const char *, __va_list) __printflike(1, 0);
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int vasprintf(char **ret, struct malloc_type *mtp, const char *format,
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__va_list ap) __printflike(3, 0);
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int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
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int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
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int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
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int ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
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int sscanf(const char *, char const *, ...) __nonnull(1) __nonnull(2);
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int vsscanf(const char *, char const *, __va_list) __nonnull(1) __nonnull(2);
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long strtol(const char *, char **, int) __nonnull(1);
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u_long strtoul(const char *, char **, int) __nonnull(1);
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quad_t strtoq(const char *, char **, int) __nonnull(1);
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u_quad_t strtouq(const char *, char **, int) __nonnull(1);
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void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
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void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
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void hexdump(const void *ptr, int length, const char *hdr, int flags);
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#define HD_COLUMN_MASK 0xff
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#define HD_DELIM_MASK 0xff00
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#define HD_OMIT_COUNT (1 << 16)
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#define HD_OMIT_HEX (1 << 17)
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#define HD_OMIT_CHARS (1 << 18)
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#define ovbcopy(f, t, l) bcopy((f), (t), (l))
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void bcopy(const void *from, void *to, size_t len) __nonnull(1) __nonnull(2);
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void bzero(void *buf, size_t len) __nonnull(1);
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void explicit_bzero(void *, size_t) __nonnull(1);
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void *memcpy(void *to, const void *from, size_t len) __nonnull(1) __nonnull(2);
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void *memmove(void *dest, const void *src, size_t n) __nonnull(1) __nonnull(2);
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int copystr(const void * __restrict kfaddr, void * __restrict kdaddr,
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size_t len, size_t * __restrict lencopied)
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__nonnull(1) __nonnull(2);
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int copyinstr(const void * __restrict udaddr, void * __restrict kaddr,
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size_t len, size_t * __restrict lencopied)
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__nonnull(1) __nonnull(2);
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int copyin(const void * __restrict udaddr, void * __restrict kaddr,
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size_t len) __nonnull(1) __nonnull(2);
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int copyin_nofault(const void * __restrict udaddr, void * __restrict kaddr,
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size_t len) __nonnull(1) __nonnull(2);
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int copyout(const void * __restrict kaddr, void * __restrict udaddr,
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size_t len) __nonnull(1) __nonnull(2);
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int copyout_nofault(const void * __restrict kaddr, void * __restrict udaddr,
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size_t len) __nonnull(1) __nonnull(2);
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int fubyte(volatile const void *base);
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long fuword(volatile const void *base);
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int fuword16(volatile const void *base);
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int32_t fuword32(volatile const void *base);
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int64_t fuword64(volatile const void *base);
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int fueword(volatile const void *base, long *val);
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int fueword32(volatile const void *base, int32_t *val);
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int fueword64(volatile const void *base, int64_t *val);
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int subyte(volatile void *base, int byte);
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int suword(volatile void *base, long word);
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int suword16(volatile void *base, int word);
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int suword32(volatile void *base, int32_t word);
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int suword64(volatile void *base, int64_t word);
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uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
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u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
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int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
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uint32_t newval);
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int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
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u_long newval);
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void realitexpire(void *);
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int sysbeep(int hertz, int period);
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void hardclock(int usermode, uintfptr_t pc);
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void hardclock_cnt(int cnt, int usermode);
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void hardclock_cpu(int usermode);
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void hardclock_sync(int cpu);
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void softclock(void *);
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void statclock(int usermode);
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void statclock_cnt(int cnt, int usermode);
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void profclock(int usermode, uintfptr_t pc);
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void profclock_cnt(int cnt, int usermode, uintfptr_t pc);
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int hardclockintr(void);
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void startprofclock(struct proc *);
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void stopprofclock(struct proc *);
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void cpu_startprofclock(void);
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void cpu_stopprofclock(void);
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sbintime_t cpu_idleclock(void);
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void cpu_activeclock(void);
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void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
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void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
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extern int cpu_deepest_sleep;
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extern int cpu_disable_c2_sleep;
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extern int cpu_disable_c3_sleep;
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int cr_cansee(struct ucred *u1, struct ucred *u2);
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int cr_canseesocket(struct ucred *cred, struct socket *so);
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int cr_canseeinpcb(struct ucred *cred, struct inpcb *inp);
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char *kern_getenv(const char *name);
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void freeenv(char *env);
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int getenv_int(const char *name, int *data);
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int getenv_uint(const char *name, unsigned int *data);
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int getenv_long(const char *name, long *data);
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int getenv_ulong(const char *name, unsigned long *data);
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int getenv_string(const char *name, char *data, int size);
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int getenv_int64(const char *name, int64_t *data);
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int getenv_uint64(const char *name, uint64_t *data);
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int getenv_quad(const char *name, quad_t *data);
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int kern_setenv(const char *name, const char *value);
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int kern_unsetenv(const char *name);
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int testenv(const char *name);
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typedef uint64_t (cpu_tick_f)(void);
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void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var);
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extern cpu_tick_f *cpu_ticks;
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uint64_t cpu_tickrate(void);
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uint64_t cputick2usec(uint64_t tick);
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#ifdef APM_FIXUP_CALLTODO
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struct timeval;
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void adjust_timeout_calltodo(struct timeval *time_change);
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#endif /* APM_FIXUP_CALLTODO */
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#include <sys/libkern.h>
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/* Initialize the world */
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void consinit(void);
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void cpu_initclocks(void);
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void cpu_initclocks_bsp(void);
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void cpu_initclocks_ap(void);
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void usrinfoinit(void);
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/* Finalize the world */
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void kern_reboot(int) __dead2;
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void shutdown_nice(int);
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/* Timeouts */
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typedef void timeout_t(void *); /* timeout function type */
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#define CALLOUT_HANDLE_INITIALIZER(handle) \
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{ NULL }
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void callout_handle_init(struct callout_handle *);
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struct callout_handle timeout(timeout_t *, void *, int);
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void untimeout(timeout_t *, void *, struct callout_handle);
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/* Stubs for obsolete functions that used to be for interrupt management */
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static __inline intrmask_t splbio(void) { return 0; }
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static __inline intrmask_t splcam(void) { return 0; }
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static __inline intrmask_t splclock(void) { return 0; }
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static __inline intrmask_t splhigh(void) { return 0; }
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static __inline intrmask_t splimp(void) { return 0; }
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static __inline intrmask_t splnet(void) { return 0; }
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static __inline intrmask_t spltty(void) { return 0; }
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static __inline void splx(intrmask_t ipl __unused) { return; }
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/*
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* Common `proc' functions are declared here so that proc.h can be included
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* less often.
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*/
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int _sleep(void *chan, struct lock_object *lock, int pri, const char *wmesg,
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sbintime_t sbt, sbintime_t pr, int flags) __nonnull(1);
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#define msleep(chan, mtx, pri, wmesg, timo) \
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_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \
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tick_sbt * (timo), 0, C_HARDCLOCK)
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#define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \
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_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
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(flags))
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int msleep_spin_sbt(void *chan, struct mtx *mtx, const char *wmesg,
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sbintime_t sbt, sbintime_t pr, int flags) __nonnull(1);
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#define msleep_spin(chan, mtx, wmesg, timo) \
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msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \
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0, C_HARDCLOCK)
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int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
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int flags);
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#define pause(wmesg, timo) \
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pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK)
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#define tsleep(chan, pri, wmesg, timo) \
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_sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \
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0, C_HARDCLOCK)
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#define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \
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_sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
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void wakeup(void *chan) __nonnull(1);
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void wakeup_one(void *chan) __nonnull(1);
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/*
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* Common `struct cdev *' stuff are declared here to avoid #include poisoning
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*/
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struct cdev;
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dev_t dev2udev(struct cdev *x);
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const char *devtoname(struct cdev *cdev);
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#ifdef __LP64__
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size_t devfs_iosize_max(void);
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size_t iosize_max(void);
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#endif
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int poll_no_poll(int events);
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/* XXX: Should be void nanodelay(u_int nsec); */
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void DELAY(int usec);
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/* Root mount holdback API */
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struct root_hold_token;
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struct root_hold_token *root_mount_hold(const char *identifier);
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void root_mount_rel(struct root_hold_token *h);
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int root_mounted(void);
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/*
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* Unit number allocation API. (kern/subr_unit.c)
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*/
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struct unrhdr;
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struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
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void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
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void delete_unrhdr(struct unrhdr *uh);
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void clean_unrhdr(struct unrhdr *uh);
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void clean_unrhdrl(struct unrhdr *uh);
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int alloc_unr(struct unrhdr *uh);
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int alloc_unr_specific(struct unrhdr *uh, u_int item);
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int alloc_unrl(struct unrhdr *uh);
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void free_unr(struct unrhdr *uh, u_int item);
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void intr_prof_stack_use(struct thread *td, struct trapframe *frame);
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extern void (*softdep_ast_cleanup)(void);
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void counted_warning(unsigned *counter, const char *msg);
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#endif /* !_SYS_SYSTM_H_ */
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