/*
* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (C) 1998 Apple Computer
/*
* @OSF_COPYRIGHT@
*/
-/*
+/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
- *
+ *
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
- *
+ *
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
+ *
* Carnegie Mellon requests users of this software to return to
- *
+ *
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
- *
+ *
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Machine-dependent simple locks for the i386.
*/
-#ifdef KERNEL_PRIVATE
-
-#ifndef _I386_LOCK_H_
-#define _I386_LOCK_H_
-
-#include <sys/appleapiopts.h>
-
-#ifdef __APPLE_API_PRIVATE
-
-#ifdef MACH_KERNEL_PRIVATE
-
-#include <kern/macro_help.h>
-#include <kern/assert.h>
-#include <i386/hw_lock_types.h>
-#include <i386/locks.h>
-
-#include <mach_rt.h>
-#include <mach_ldebug.h>
-
-typedef struct {
- lck_mtx_t lck_mtx; /* inlined lck_mtx, need to be first */
-#if MACH_LDEBUG
- int type;
-#define MUTEX_TAG 0x4d4d
- vm_offset_t pc;
- vm_offset_t thread;
-#endif /* MACH_LDEBUG */
-} mutex_t;
-
-typedef struct {
- decl_simple_lock_data(,interlock) /* "hardware" interlock field */
- volatile unsigned int
- read_count:16, /* No. of accepted readers */
- want_upgrade:1, /* Read-to-write upgrade waiting */
- want_write:1, /* Writer is waiting, or locked for write */
- waiting:1, /* Someone is sleeping on lock */
- can_sleep:1; /* Can attempts to lock go to sleep? */
-} lock_t;
-
-extern unsigned int LockTimeOut; /* Number of hardware ticks of a lock timeout */
-
-
-#if defined(__GNUC__)
-
-/*
- * General bit-lock routines.
- */
-
-#define bit_lock(bit,l) \
- __asm__ volatile(" jmp 1f \n \
- 0: btl %0, %1 \n \
- jb 0b \n \
- 1: lock \n \
- btsl %0,%1 \n \
- jb 0b" : \
- : \
- "r" (bit), "m" (*(volatile int *)(l)) : \
- "memory");
-
-#define bit_unlock(bit,l) \
- __asm__ volatile(" lock \n \
- btrl %0,%1" : \
- : \
- "r" (bit), "m" (*(volatile int *)(l)));
-
-/*
- * Set or clear individual bits in a long word.
- * The locked access is needed only to lock access
- * to the word, not to individual bits.
- */
-
-#define i_bit_set(bit,l) \
- __asm__ volatile(" lock \n \
- btsl %0,%1" : \
- : \
- "r" (bit), "m" (*(volatile int *)(l)));
-
-#define i_bit_clear(bit,l) \
- __asm__ volatile(" lock \n \
- btrl %0,%1" : \
- : \
- "r" (bit), "m" (*(volatile int *)(l)));
-
-static inline unsigned long i_bit_isset(unsigned int test, volatile unsigned long *word)
-{
- int bit;
-
- __asm__ volatile("btl %2,%1\n\tsbbl %0,%0" : "=r" (bit)
- : "m" (word), "ir" (test));
- return bit;
-}
-
-static inline char xchgb(volatile char * cp, char new);
-
-static inline void atomic_incl(long * p, long delta);
-static inline void atomic_incs(short * p, short delta);
-static inline void atomic_incb(char * p, char delta);
-
-static inline void atomic_decl(long * p, long delta);
-static inline void atomic_decs(short * p, short delta);
-static inline void atomic_decb(char * p, char delta);
-
-static inline long atomic_getl(long * p);
-static inline short atomic_gets(short * p);
-static inline char atomic_getb(char * p);
-
-static inline void atomic_setl(long * p, long value);
-static inline void atomic_sets(short * p, short value);
-static inline void atomic_setb(char * p, char value);
-
-static inline char xchgb(volatile char * cp, char new)
-{
- register char old = new;
-
- __asm__ volatile (" xchgb %0,%2" :
- "=q" (old) :
- "0" (new), "m" (*(volatile char *)cp) : "memory");
- return (old);
-}
-
-/*
- * Compare and exchange:
- * - returns failure (0) if the location did not contain the old value,
- * - returns success (1) if the location was set to the new value.
- */
-static inline uint32_t
-atomic_cmpxchg(uint32_t *p, uint32_t old, uint32_t new)
-{
- uint32_t res = old;
-
- asm volatile(
- "lock; cmpxchgl %1,%2; \n\t"
- " setz %%al; \n\t"
- " movzbl %%al,%0"
- : "+a" (res) /* %0: old value to compare, returns success */
- : "r" (new), /* %1: new value to set */
- "m" (*(p)) /* %2: memory address */
- : "memory");
- return (res);
-}
-
-static inline uint64_t
-atomic_load64(uint64_t *quadp)
-{
- uint64_t ret;
-
- asm volatile(
- " lock; cmpxchg8b %1"
- : "=A" (ret)
- : "m" (*quadp), "a" (0), "d" (0), "b" (0), "c" (0));
- return (ret);
-}
-
-static inline uint64_t
-atomic_loadstore64(uint64_t *quadp, uint64_t new)
-{
- uint64_t ret;
-
- ret = *quadp;
- asm volatile(
- "1: \n\t"
- " lock; cmpxchg8b %1 \n\t"
- " jnz 1b"
- : "+A" (ret)
- : "m" (*quadp),
- "b" ((uint32_t)new), "c" ((uint32_t)(new >> 32)));
- return (ret);
-}
-
-static inline void atomic_incl(long * p, long delta)
-{
- __asm__ volatile (" lock \n \
- addl %0,%1" : \
- : \
- "r" (delta), "m" (*(volatile long *)p));
-}
-
-static inline void atomic_incs(short * p, short delta)
-{
- __asm__ volatile (" lock \n \
- addw %0,%1" : \
- : \
- "q" (delta), "m" (*(volatile short *)p));
-}
-
-static inline void atomic_incb(char * p, char delta)
-{
- __asm__ volatile (" lock \n \
- addb %0,%1" : \
- : \
- "q" (delta), "m" (*(volatile char *)p));
-}
-
-static inline void atomic_decl(long * p, long delta)
-{
- __asm__ volatile (" lock \n \
- subl %0,%1" : \
- : \
- "r" (delta), "m" (*(volatile long *)p));
-}
-
-static inline int atomic_decl_and_test(long * p, long delta)
-{
- uint8_t ret;
- asm volatile (
- " lock \n\t"
- " subl %1,%2 \n\t"
- " sete %0"
- : "=qm" (ret)
- : "r" (delta), "m" (*(volatile long *)p));
- return ret;
-}
-
-static inline void atomic_decs(short * p, short delta)
-{
- __asm__ volatile (" lock \n \
- subw %0,%1" : \
- : \
- "q" (delta), "m" (*(volatile short *)p));
-}
-
-static inline void atomic_decb(char * p, char delta)
-{
- __asm__ volatile (" lock \n \
- subb %0,%1" : \
- : \
- "q" (delta), "m" (*(volatile char *)p));
-}
-
-static inline long atomic_getl(long * p)
-{
- return (*p);
-}
-
-static inline short atomic_gets(short * p)
-{
- return (*p);
-}
-
-static inline char atomic_getb(char * p)
-{
- return (*p);
-}
-
-static inline void atomic_setl(long * p, long value)
-{
- *p = value;
-}
-
-static inline void atomic_sets(short * p, short value)
-{
- *p = value;
-}
-
-static inline void atomic_setb(char * p, char value)
-{
- *p = value;
-}
-
-
-#else /* !defined(__GNUC__) */
-
-extern void i_bit_set(
- int index,
- void *addr);
-
-extern void i_bit_clear(
- int index,
- void *addr);
-
-extern void bit_lock(
- int index,
- void *addr);
-
-extern void bit_unlock(
- int index,
- void *addr);
-
-/*
- * All other routines defined in __GNUC__ case lack
- * definitions otherwise. - XXX
- */
-
-#endif /* !defined(__GNUC__) */
-
-extern void kernel_preempt_check (void);
+#ifdef KERNEL_PRIVATE
-#endif /* MACH_KERNEL_PRIVATE */
+#ifndef _I386_LOCK_H_
+#define _I386_LOCK_H_
-#endif /* __APLE_API_PRIVATE */
+#warning This header is deprecated. Use <kern/locks.h> instead.
-#endif /* _I386_LOCK_H_ */
+#endif /* _I386_LOCK_H_ */
-#endif /* KERNEL_PRIVATE */
+#endif /* KERNEL_PRIVATE */
projects / apple / xnu.git / blobdiff