48198e3ddd
arbitrary frequencies into hardclock(), statclock() and profclock() calls. Same code with minor variations duplicated several times over the tree for different timer drivers and architectures. - Switch all x86 archs to new functions, simplifying the code and removing extra logic from timer drivers. Other archs are also welcome.
420 lines
15 KiB
C
420 lines
15 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 rebooting; /* boot() 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 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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*/
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enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN };
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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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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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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) _CTASSERT(x, __LINE__)
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#define _CTASSERT(x, y) __CTASSERT(x, y)
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#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
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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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* 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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/*
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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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int setjmp(struct _jmp_buf *);
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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 *hashmark);
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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 g_waitidle(void);
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#ifdef RESTARTABLE_PANICS
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void panic(const char *, ...) __printflike(1, 2);
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#else
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void panic(const char *, ...) __dead2 __printflike(1, 2);
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#endif
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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_param3(long kmempages);
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void init_static_kenv(char *, size_t);
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void tablefull(const char *);
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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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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 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 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 *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 copyout(const void * __restrict kaddr, void * __restrict udaddr,
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size_t len) __nonnull(1) __nonnull(2);
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int fubyte(const void *base);
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long fuword(const void *base);
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int fuword16(void *base);
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int32_t fuword32(const void *base);
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int64_t fuword64(const void *base);
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int subyte(void *base, int byte);
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int suword(void *base, long word);
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int suword16(void *base, int word);
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int suword32(void *base, int32_t word);
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int suword64(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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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_cpu(int usermode);
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void softclock(void *);
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void statclock(int usermode);
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void profclock(int usermode, uintfptr_t pc);
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void timer1clock(int usermode, uintfptr_t pc);
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void timer2clock(int usermode, uintfptr_t pc);
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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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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 *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_quad(const char *name, quad_t *data);
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int setenv(const char *name, const char *value);
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int 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 usrinfoinit(void);
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/* Finalize the world */
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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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caddr_t kern_timeout_callwheel_alloc(caddr_t v);
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void kern_timeout_callwheel_init(void);
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/* Stubs for obsolete functions that used to be for interrupt management */
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static __inline void spl0(void) { return; }
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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 splsoftcam(void) { return 0; }
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static __inline intrmask_t splsoftclock(void) { return 0; }
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static __inline intrmask_t splsofttty(void) { return 0; }
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static __inline intrmask_t splsoftvm(void) { return 0; }
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static __inline intrmask_t splsofttq(void) { return 0; }
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static __inline intrmask_t splstatclock(void) { return 0; }
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static __inline intrmask_t spltty(void) { return 0; }
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static __inline intrmask_t splvm(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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int timo) __nonnull(1);
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#define msleep(chan, mtx, pri, wmesg, timo) \
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_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (timo))
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int msleep_spin(void *chan, struct mtx *mtx, const char *wmesg, int timo)
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__nonnull(1);
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int pause(const char *wmesg, int timo);
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#define tsleep(chan, pri, wmesg, timo) \
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_sleep((chan), NULL, (pri), (wmesg), (timo))
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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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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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void root_mount_wait(void);
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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 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_unrl(struct unrhdr *uh);
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void free_unr(struct unrhdr *uh, u_int item);
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/*
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* This is about as magic as it gets. fortune(1) has got similar code
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* for reversing bits in a word. Who thinks up this stuff??
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*
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* Yes, it does appear to be consistently faster than:
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* while (i = ffs(m)) {
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* m >>= i;
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* bits++;
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* }
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* and
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* while (lsb = (m & -m)) { // This is magic too
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* m &= ~lsb; // or: m ^= lsb
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* bits++;
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* }
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* Both of these latter forms do some very strange things on gcc-3.1 with
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* -mcpu=pentiumpro and/or -march=pentiumpro and/or -O or -O2.
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* There is probably an SSE or MMX popcnt instruction.
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*
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* I wonder if this should be in libkern?
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*
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* XXX Stop the presses! Another one:
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* static __inline u_int32_t
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* popcnt1(u_int32_t v)
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* {
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* v -= ((v >> 1) & 0x55555555);
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* v = (v & 0x33333333) + ((v >> 2) & 0x33333333);
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* v = (v + (v >> 4)) & 0x0F0F0F0F;
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* return (v * 0x01010101) >> 24;
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* }
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* The downside is that it has a multiply. With a pentium3 with
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* -mcpu=pentiumpro and -march=pentiumpro then gcc-3.1 will use
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* an imull, and in that case it is faster. In most other cases
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* it appears slightly slower.
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*
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* Another variant (also from fortune):
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* #define BITCOUNT(x) (((BX_(x)+(BX_(x)>>4)) & 0x0F0F0F0F) % 255)
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* #define BX_(x) ((x) - (((x)>>1)&0x77777777) \
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* - (((x)>>2)&0x33333333) \
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* - (((x)>>3)&0x11111111))
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*/
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static __inline uint32_t
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bitcount32(uint32_t x)
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{
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x = (x & 0x55555555) + ((x & 0xaaaaaaaa) >> 1);
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x = (x & 0x33333333) + ((x & 0xcccccccc) >> 2);
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x = (x + (x >> 4)) & 0x0f0f0f0f;
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x = (x + (x >> 8));
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x = (x + (x >> 16)) & 0x000000ff;
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return (x);
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}
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#endif /* !_SYS_SYSTM_H_ */
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