xref: /titanic_51/usr/src/uts/intel/asm/thread.h (revision 6b7143d774683daf27dfb2e93ab48d1ade1a3477)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate /*
237c478bd9Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate #ifndef _ASM_THREAD_H
287c478bd9Sstevel@tonic-gate #define	_ASM_THREAD_H
297c478bd9Sstevel@tonic-gate 
30*6b7143d7SRichard Lowe #include <sys/ccompile.h>
317c478bd9Sstevel@tonic-gate #include <sys/types.h>
327c478bd9Sstevel@tonic-gate 
337c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
347c478bd9Sstevel@tonic-gate extern "C" {
357c478bd9Sstevel@tonic-gate #endif
367c478bd9Sstevel@tonic-gate 
377c478bd9Sstevel@tonic-gate #if !defined(__lint) && defined(__GNUC__)
387c478bd9Sstevel@tonic-gate 
397c478bd9Sstevel@tonic-gate struct _kthread;
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate /*
427c478bd9Sstevel@tonic-gate  * 0x10 is offsetof(struct cpu, cpu_thread)
437c478bd9Sstevel@tonic-gate  * 0x18 is the same thing for the _LP64 version.
447c478bd9Sstevel@tonic-gate  * (It's also the value of CPU_THREAD in assym.h)
457c478bd9Sstevel@tonic-gate  * Yuck.
467c478bd9Sstevel@tonic-gate  */
477c478bd9Sstevel@tonic-gate 
48*6b7143d7SRichard Lowe extern __GNU_INLINE struct _kthread
49*6b7143d7SRichard Lowe *threadp(void)
507c478bd9Sstevel@tonic-gate {
517c478bd9Sstevel@tonic-gate 	void *__value;
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate #if defined(__amd64)
547c478bd9Sstevel@tonic-gate 	__asm__ __volatile__(
557c478bd9Sstevel@tonic-gate 	    "movq %%gs:0x18,%0"		/* CPU_THREAD */
567c478bd9Sstevel@tonic-gate 	    : "=r" (__value));
577c478bd9Sstevel@tonic-gate #elif defined(__i386)
587c478bd9Sstevel@tonic-gate 	__asm__ __volatile__(
597c478bd9Sstevel@tonic-gate 	    "movl %%gs:0x10,%0"		/* CPU_THREAD */
607c478bd9Sstevel@tonic-gate 	    : "=r" (__value));
617c478bd9Sstevel@tonic-gate #else
627c478bd9Sstevel@tonic-gate #error	"port me"
637c478bd9Sstevel@tonic-gate #endif
647c478bd9Sstevel@tonic-gate 	return (__value);
657c478bd9Sstevel@tonic-gate }
667c478bd9Sstevel@tonic-gate 
677c478bd9Sstevel@tonic-gate #endif	/* !__lint && __GNUC__ */
687c478bd9Sstevel@tonic-gate 
697c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
707c478bd9Sstevel@tonic-gate }
717c478bd9Sstevel@tonic-gate #endif
727c478bd9Sstevel@tonic-gate 
737c478bd9Sstevel@tonic-gate #endif	/* _ASM_THREAD_H */
74