/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_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
- * 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@
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
*/
/*
* Copyright (c) 1997-1998 Apple Computer, Inc.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
.macro ENTRY
- .text
- .align 2
- .globl $0
+ .text
+ .align 2
+ .globl $0
$0:
.endmacro
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
/*
-int OSCompareAndSwap( UInt32 oldVal, UInt32 newVal, UInt32 * addr )
+int OSCompareAndSwap( UInt32 oldVal, UInt32 newVal, UInt32 * addr )
+ This is now an alias to hw_compare_and_store, see xnu/libkern/Makefile.
+
+void * OSDequeueAtomic(void ** inList, SInt32 inOffset)
+ This is also aliased, to hw_dequeue_atomic.
+
+void OSEnqueueAtomic(void ** inList, void * inNewLink, SInt32 inOffset)
+ This is aliased to hw_queue_atomic.
*/
-
- ENTRY _OSCompareAndSwap
-
- lwarx r6, 0,r5 /* CEMV10 */
-.L_CASretry:
- lwarx r6, 0,r5
- cmpw r6, r3
- bne- .L_CASfail
- stwcx. r4, 0,r5
- bne- .L_CASretry
- isync
- li r3, 1
- blr
-.L_CASfail:
- li r3, 0
- blr
-
-
+/*
+Note: We can not use the hw_atomic routines provided by osfmk/ppc as
+the return the result of the addition not the original value.
+*/
/*
SInt32 OSDecrementAtomic(SInt32 * value)
*/
- ENTRY _OSDecrementAtomic
- mr r4, r3
- li r3, -1
- b _OSAddAtomic
+ ENTRY _OSDecrementAtomic
+ mr r4, r3
+ li r3, -1
+ b _OSAddAtomic
/*
SInt32 OSIncrementAtomic(SInt32 * value)
*/
- ENTRY _OSIncrementAtomic
- mr r4, r3
- li r3, 1
+ .align 5
+
+ ENTRY _OSIncrementAtomic
+ mr r4, r3
+ li r3, 1
/*
SInt32 OSAddAtomic(SInt32 amount, SInt32 * value)
*/
- ENTRY _OSAddAtomic
-
- mr r5,r3 /* Save the increment */
- lwarx r3,0,r4 /* CEMV10 */
+ ENTRY _OSAddAtomic
+ mr r5,r3 /* Save the increment */
.L_AAretry:
- lwarx r3, 0, r4 /* Grab the area value */
- add r6, r3, r5 /* Add the value */
- stwcx. r6, 0, r4 /* Try to save the new value */
- bne- .L_AAretry /* Didn't get it, try again... */
- blr /* Return the original value */
-
-
-
+ lwarx r3, 0, r4 /* Grab the area value */
+ add r6, r3, r5 /* Add the value */
+ stwcx. r6, 0, r4 /* Try to save the new value */
+ bne- .L_AAretry /* Didn't get it, try again... */
+ blr /* Return the original value */
projects / apple / xnu.git / blobdiff