Replace MAXPHYS by runtime variable maxphys. It is initialized from MAXPHYS by default, but can be also adjusted with the tunable kern.maxphys. Make b_pages[] array in struct buf flexible. Size b_pages[] for buffer cache buffers exactly to atop(maxbcachebuf) (currently it is sized to atop(MAXPHYS)), and b_pages[] for pbufs is sized to atop(maxphys) + 1. The +1 for pbufs allow several pbuf consumers, among them vmapbuf(), to use unaligned buffers still sized to maxphys, esp. when such buffers come from userspace (*). Overall, we save significant amount of otherwise wasted memory in b_pages[] for buffer cache buffers, while bumping MAXPHYS to desired high value. Eliminate all direct uses of the MAXPHYS constant in kernel and driver sources, except a place which initialize maxphys. Some random (and arguably weird) uses of MAXPHYS, e.g. in linuxolator, are converted straight. Some drivers, which use MAXPHYS to size embeded structures, get private MAXPHYS-like constant; their convertion is out of scope for this work. Changes to cam/, dev/ahci, dev/ata, dev/mpr, dev/mpt, dev/mvs, dev/siis, where either submitted by, or based on changes by mav. Suggested by: mav (*) Reviewed by: imp, mav, imp, mckusick, scottl (intermediate versions) Tested by: pho Sponsored by: The FreeBSD Foundation Differential revision: https://reviews.freebsd.org/D27225
634 lines
22 KiB
C
634 lines
22 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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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* 3. 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 <sys/cdefs.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/queue.h>
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#include <sys/stdint.h> /* for people using printf mainly */
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__NULLABILITY_PRAGMA_PUSH
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#ifdef _KERNEL
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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 bool panicked;
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#define KERNEL_PANICKED() __predict_false(panicked)
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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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extern u_long maxphys; /* max raw I/O transfer size */
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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_GUEST_KVM, VM_GUEST_BHYVE, VM_GUEST_VBOX,
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VM_GUEST_PARALLELS, VM_LAST };
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#ifdef INVARIANTS /* The option is always available */
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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: %s not true at %s:%d (%s)\n",\
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#exp, __FILE__, __LINE__, __func__); \
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kassert_panic msg; \
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} \
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} while (0)
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#define VNPASS(exp, vp) do { \
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const char *_exp = #exp; \
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VNASSERT(exp, vp, ("condition %s not met at %s:%d (%s)", \
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_exp, __FILE__, __LINE__, __func__)); \
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} while (0)
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#define __assert_unreachable() \
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panic("executing segment marked as unreachable at %s:%d (%s)\n", \
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__FILE__, __LINE__, __func__)
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#else
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#define VNASSERT(exp, vp, msg) do { \
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} while (0)
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#define VNPASS(exp, vp) do { \
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} while (0)
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#define __assert_unreachable() __unreachable()
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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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#endif /* KERNEL */
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/*
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* These functions need to be declared before the KASSERT macro is invoked in
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* !KASSERT_PANIC_OPTIONAL builds, so their declarations are sort of out of
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* place compared to other function definitions in this header. On the other
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* hand, this header is a bit disorganized anyway.
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*/
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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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#if defined(_STANDALONE)
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struct ucred;
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/*
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* Until we have more experience with KASSERTS that are called
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* from the boot loader, they are off. The bootloader does this
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* a little differently than the kernel (we just call printf atm).
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* we avoid most of the common functions in the boot loader, so
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* declare printf() here too.
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*/
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int printf(const char *, ...) __printflike(1, 2);
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# define kassert_panic printf
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#else /* !_STANDALONE */
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# if defined(WITNESS) || defined(INVARIANT_SUPPORT)
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# ifdef KASSERT_PANIC_OPTIONAL
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void kassert_panic(const char *fmt, ...) __printflike(1, 2);
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# else
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# define kassert_panic panic
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# endif /* KASSERT_PANIC_OPTIONAL */
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# endif /* defined(WITNESS) || defined(INVARIANT_SUPPORT) */
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#endif /* _STANDALONE */
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#if defined(INVARIANTS) || defined(_STANDALONE)
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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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#else /* !INVARIANTS && !_STANDALONE */
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#define KASSERT(exp,msg) do { \
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} while (0)
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#endif /* INVARIANTS || _STANDALONE */
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/*
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* Helpful macros for quickly coming up with assertions with informative
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* panic messages.
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*/
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#define MPASS(ex) MPASS4(ex, #ex, __FILE__, __LINE__)
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#define MPASS2(ex, what) MPASS4(ex, what, __FILE__, __LINE__)
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#define MPASS3(ex, file, line) MPASS4(ex, #ex, file, line)
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#define MPASS4(ex, what, file, line) \
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KASSERT((ex), ("Assertion %s failed at %s:%d", what, file, line))
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/*
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* Align variables.
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*/
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#define __read_mostly __section(".data.read_mostly")
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#define __read_frequently __section(".data.read_frequently")
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#define __exclusive_cache_line __aligned(CACHE_LINE_SIZE) \
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__section(".data.exclusive_cache_line")
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#ifdef _KERNEL
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#include <sys/param.h> /* MAXCPU */
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#include <sys/pcpu.h> /* curthread */
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#include <sys/kpilite.h>
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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_TD(td) ({ \
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MPASS((td) == curthread); \
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__predict_false((td)->td_stopsched); \
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})
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#define SCHEDULER_STOPPED() SCHEDULER_STOPPED_TD(curthread)
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extern int osreldate;
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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 cpu_flush_dcache(void *, size_t);
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void cpu_rootconf(void);
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void critical_enter_KBI(void);
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void critical_exit_KBI(void);
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void critical_exit_preempt(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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/*
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* Allocate per-thread "current" state in the linuxkpi
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*/
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extern int (*lkpi_alloc_current)(struct thread *, int);
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int linux_alloc_current_noop(struct thread *, int);
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#if defined(KLD_MODULE) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
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#define critical_enter() critical_enter_KBI()
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#define critical_exit() critical_exit_KBI()
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#else
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static __inline void
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critical_enter(void)
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{
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struct thread_lite *td;
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td = (struct thread_lite *)curthread;
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td->td_critnest++;
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__compiler_membar();
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}
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static __inline void
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critical_exit(void)
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{
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struct thread_lite *td;
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td = (struct thread_lite *)curthread;
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KASSERT(td->td_critnest != 0,
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("critical_exit: td_critnest == 0"));
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__compiler_membar();
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td->td_critnest--;
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__compiler_membar();
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if (__predict_false(td->td_owepreempt))
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critical_exit_preempt();
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}
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#endif
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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 sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
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int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0);
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long strtol(const char *, char **, int);
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u_long strtoul(const char *, char **, int);
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quad_t strtoq(const char *, char **, int);
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u_quad_t strtouq(const char *, char **, int);
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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 * _Nonnull from, void * _Nonnull to, size_t len);
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void bzero(void * _Nonnull buf, size_t len);
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void explicit_bzero(void * _Nonnull, size_t);
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int bcmp(const void *b1, const void *b2, size_t len);
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void *memset(void * _Nonnull buf, int c, size_t len);
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void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
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void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
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int memcmp(const void *b1, const void *b2, size_t len);
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#ifdef KCSAN
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void *kcsan_memset(void *, int, size_t);
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void *kcsan_memcpy(void *, const void *, size_t);
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void *kcsan_memmove(void *, const void *, size_t);
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int kcsan_memcmp(const void *, const void *, size_t);
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#define bcopy(from, to, len) kcsan_memmove((to), (from), (len))
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#define bzero(buf, len) kcsan_memset((buf), 0, (len))
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#define bcmp(b1, b2, len) kcsan_memcmp((b1), (b2), (len))
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#define memset(buf, c, len) kcsan_memset((buf), (c), (len))
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#define memcpy(to, from, len) kcsan_memcpy((to), (from), (len))
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#define memmove(dest, src, n) kcsan_memmove((dest), (src), (n))
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#define memcmp(b1, b2, len) kcsan_memcmp((b1), (b2), (len))
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#else
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#define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
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#define bzero(buf, len) __builtin_memset((buf), 0, (len))
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#define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
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#define memset(buf, c, len) __builtin_memset((buf), (c), (len))
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#define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
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#define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
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#define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
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#endif
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void *memset_early(void * _Nonnull buf, int c, size_t len);
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#define bzero_early(buf, len) memset_early((buf), 0, (len))
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void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
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void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
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#define bcopy_early(from, to, len) memmove_early((to), (from), (len))
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#define copystr(src, dst, len, outlen) ({ \
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size_t __r, __len, *__outlen; \
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\
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__len = (len); \
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__outlen = (outlen); \
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__r = strlcpy((dst), (src), __len); \
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if (__outlen != NULL) \
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*__outlen = ((__r >= __len) ? __len : __r + 1); \
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((__r >= __len) ? ENAMETOOLONG : 0); \
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})
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int copyinstr(const void * __restrict udaddr,
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void * _Nonnull __restrict kaddr, size_t len,
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size_t * __restrict lencopied);
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int copyin(const void * __restrict udaddr,
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void * _Nonnull __restrict kaddr, size_t len);
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int copyin_nofault(const void * __restrict udaddr,
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void * _Nonnull __restrict kaddr, size_t len);
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int copyout(const void * _Nonnull __restrict kaddr,
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void * __restrict udaddr, size_t len);
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int copyout_nofault(const void * _Nonnull __restrict kaddr,
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void * __restrict udaddr, size_t len);
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#ifdef KCSAN
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int kcsan_copyin(const void *, void *, size_t);
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int kcsan_copyinstr(const void *, void *, size_t, size_t *);
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int kcsan_copyout(const void *, void *, size_t);
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#define copyin(u, k, l) kcsan_copyin((u), (k), (l))
|
|
#define copyinstr(u, k, l, lc) kcsan_copyinstr((u), (k), (l), (lc))
|
|
#define copyout(k, u, l) kcsan_copyout((k), (u), (l))
|
|
#endif
|
|
|
|
int fubyte(volatile const void *base);
|
|
long fuword(volatile const void *base);
|
|
int fuword16(volatile const void *base);
|
|
int32_t fuword32(volatile const void *base);
|
|
int64_t fuword64(volatile const void *base);
|
|
int fueword(volatile const void *base, long *val);
|
|
int fueword32(volatile const void *base, int32_t *val);
|
|
int fueword64(volatile const void *base, int64_t *val);
|
|
int subyte(volatile void *base, int byte);
|
|
int suword(volatile void *base, long word);
|
|
int suword16(volatile void *base, int word);
|
|
int suword32(volatile void *base, int32_t word);
|
|
int suword64(volatile void *base, int64_t word);
|
|
uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
|
|
u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
|
|
int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
|
|
uint32_t newval);
|
|
int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
|
|
u_long newval);
|
|
|
|
void realitexpire(void *);
|
|
|
|
int sysbeep(int hertz, int period);
|
|
|
|
void hardclock(int cnt, int usermode);
|
|
void hardclock_sync(int cpu);
|
|
void softclock(void *);
|
|
void statclock(int cnt, int usermode);
|
|
void profclock(int cnt, int usermode, uintfptr_t pc);
|
|
|
|
int hardclockintr(void);
|
|
|
|
void startprofclock(struct proc *);
|
|
void stopprofclock(struct proc *);
|
|
void cpu_startprofclock(void);
|
|
void cpu_stopprofclock(void);
|
|
void suspendclock(void);
|
|
void resumeclock(void);
|
|
sbintime_t cpu_idleclock(void);
|
|
void cpu_activeclock(void);
|
|
void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
|
|
void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
|
|
extern int cpu_disable_c2_sleep;
|
|
extern int cpu_disable_c3_sleep;
|
|
|
|
char *kern_getenv(const char *name);
|
|
void freeenv(char *env);
|
|
int getenv_int(const char *name, int *data);
|
|
int getenv_uint(const char *name, unsigned int *data);
|
|
int getenv_long(const char *name, long *data);
|
|
int getenv_ulong(const char *name, unsigned long *data);
|
|
int getenv_string(const char *name, char *data, int size);
|
|
int getenv_int64(const char *name, int64_t *data);
|
|
int getenv_uint64(const char *name, uint64_t *data);
|
|
int getenv_quad(const char *name, quad_t *data);
|
|
int getenv_bool(const char *name, bool *data);
|
|
bool getenv_is_true(const char *name);
|
|
bool getenv_is_false(const char *name);
|
|
int kern_setenv(const char *name, const char *value);
|
|
int kern_unsetenv(const char *name);
|
|
int testenv(const char *name);
|
|
|
|
int getenv_array(const char *name, void *data, int size, int *psize,
|
|
int type_size, bool allow_signed);
|
|
#define GETENV_UNSIGNED false /* negative numbers not allowed */
|
|
#define GETENV_SIGNED true /* negative numbers allowed */
|
|
|
|
typedef uint64_t (cpu_tick_f)(void);
|
|
void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var);
|
|
extern cpu_tick_f *cpu_ticks;
|
|
uint64_t cpu_tickrate(void);
|
|
uint64_t cputick2usec(uint64_t tick);
|
|
|
|
#include <sys/libkern.h>
|
|
|
|
/* Initialize the world */
|
|
void consinit(void);
|
|
void cpu_initclocks(void);
|
|
void cpu_initclocks_bsp(void);
|
|
void cpu_initclocks_ap(void);
|
|
void usrinfoinit(void);
|
|
|
|
/* Finalize the world */
|
|
void kern_reboot(int) __dead2;
|
|
void shutdown_nice(int);
|
|
|
|
/* Stubs for obsolete functions that used to be for interrupt management */
|
|
static __inline intrmask_t splhigh(void) { return 0; }
|
|
static __inline intrmask_t splimp(void) { return 0; }
|
|
static __inline intrmask_t splnet(void) { return 0; }
|
|
static __inline intrmask_t spltty(void) { return 0; }
|
|
static __inline void splx(intrmask_t ipl __unused) { return; }
|
|
|
|
/*
|
|
* Common `proc' functions are declared here so that proc.h can be included
|
|
* less often.
|
|
*/
|
|
int _sleep(const void * _Nonnull chan, struct lock_object *lock, int pri,
|
|
const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
|
|
#define msleep(chan, mtx, pri, wmesg, timo) \
|
|
_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \
|
|
tick_sbt * (timo), 0, C_HARDCLOCK)
|
|
#define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \
|
|
_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
|
|
(flags))
|
|
int msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx,
|
|
const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
|
|
#define msleep_spin(chan, mtx, wmesg, timo) \
|
|
msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \
|
|
0, C_HARDCLOCK)
|
|
int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
|
|
int flags);
|
|
#define pause(wmesg, timo) \
|
|
pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK)
|
|
#define pause_sig(wmesg, timo) \
|
|
pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
|
|
#define tsleep(chan, pri, wmesg, timo) \
|
|
_sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \
|
|
0, C_HARDCLOCK)
|
|
#define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \
|
|
_sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
|
|
void wakeup(const void *chan);
|
|
void wakeup_one(const void *chan);
|
|
void wakeup_any(const void *chan);
|
|
|
|
/*
|
|
* Common `struct cdev *' stuff are declared here to avoid #include poisoning
|
|
*/
|
|
|
|
struct cdev;
|
|
dev_t dev2udev(struct cdev *x);
|
|
const char *devtoname(struct cdev *cdev);
|
|
|
|
#ifdef __LP64__
|
|
size_t devfs_iosize_max(void);
|
|
size_t iosize_max(void);
|
|
#endif
|
|
|
|
int poll_no_poll(int events);
|
|
|
|
/* XXX: Should be void nanodelay(u_int nsec); */
|
|
void DELAY(int usec);
|
|
|
|
/* Root mount holdback API */
|
|
struct root_hold_token {
|
|
int flags;
|
|
const char *who;
|
|
TAILQ_ENTRY(root_hold_token) list;
|
|
};
|
|
|
|
struct root_hold_token *root_mount_hold(const char *identifier);
|
|
void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
|
|
void root_mount_rel(struct root_hold_token *h);
|
|
int root_mounted(void);
|
|
|
|
/*
|
|
* Unit number allocation API. (kern/subr_unit.c)
|
|
*/
|
|
struct unrhdr;
|
|
struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
|
|
void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
|
|
void delete_unrhdr(struct unrhdr *uh);
|
|
void clear_unrhdr(struct unrhdr *uh);
|
|
void clean_unrhdr(struct unrhdr *uh);
|
|
void clean_unrhdrl(struct unrhdr *uh);
|
|
int alloc_unr(struct unrhdr *uh);
|
|
int alloc_unr_specific(struct unrhdr *uh, u_int item);
|
|
int alloc_unrl(struct unrhdr *uh);
|
|
void free_unr(struct unrhdr *uh, u_int item);
|
|
|
|
#ifndef __LP64__
|
|
#define UNR64_LOCKED
|
|
#endif
|
|
|
|
struct unrhdr64 {
|
|
uint64_t counter;
|
|
};
|
|
|
|
static __inline void
|
|
new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
|
|
{
|
|
|
|
unr64->counter = low;
|
|
}
|
|
|
|
#ifdef UNR64_LOCKED
|
|
uint64_t alloc_unr64(struct unrhdr64 *);
|
|
#else
|
|
static __inline uint64_t
|
|
alloc_unr64(struct unrhdr64 *unr64)
|
|
{
|
|
|
|
return (atomic_fetchadd_64(&unr64->counter, 1));
|
|
}
|
|
#endif
|
|
|
|
void intr_prof_stack_use(struct thread *td, struct trapframe *frame);
|
|
|
|
void counted_warning(unsigned *counter, const char *msg);
|
|
|
|
/*
|
|
* APIs to manage deprecation and obsolescence.
|
|
*/
|
|
struct device;
|
|
void _gone_in(int major, const char *msg);
|
|
void _gone_in_dev(struct device *dev, int major, const char *msg);
|
|
#ifdef NO_OBSOLETE_CODE
|
|
#define __gone_ok(m, msg) \
|
|
_Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \
|
|
"Obsolete code: " msg);
|
|
#else
|
|
#define __gone_ok(m, msg)
|
|
#endif
|
|
#define gone_in(major, msg) __gone_ok(major, msg) _gone_in(major, msg)
|
|
#define gone_in_dev(dev, major, msg) __gone_ok(major, msg) _gone_in_dev(dev, major, msg)
|
|
#endif /* _KERNEL */
|
|
|
|
__NULLABILITY_PRAGMA_POP
|
|
|
|
#endif /* !_SYS_SYSTM_H_ */
|