xref: /titanic_51/usr/src/uts/sun4/ml/xc.s (revision 15d9d0b528387242011cdcc6190c9e598cfe3a07)
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#if defined(lint)
30#include <sys/types.h>
31#include <sys/cpuvar.h>
32#else	/*lint */
33#include "assym.h"
34#endif	/* lint */
35
36#include <sys/param.h>
37#include <sys/asm_linkage.h>
38#include <sys/errno.h>
39#include <sys/intreg.h>
40#include <sys/intr.h>
41#include <sys/x_call.h>
42#include <sys/privregs.h>
43#include <sys/machthread.h>
44#include <sys/machtrap.h>
45#include <sys/xc_impl.h>
46#include <sys/bitmap.h>
47
48#ifdef TRAPTRACE
49#include <sys/traptrace.h>
50#endif /* TRAPTRACE */
51
52
53#if defined(lint)
54
55/* ARGSUSED */
56void
57send_self_xcall(struct cpu *cpu, uint64_t arg1, uint64_t arg2, xcfunc_t *func)
58{}
59
60#else
61/*
62 * For a x-trap request to the same processor, just send a fast trap.
63 * Does not accept inums.
64 */
65	ENTRY_NP(send_self_xcall)
66	ta	 ST_SELFXCALL
67	retl
68	nop
69	SET_SIZE(send_self_xcall)
70#endif	/* lint */
71
72#if defined(lint)
73void
74idle_stop_xcall(void)
75{}
76#else
77/*
78 * idle or stop xcall handler.
79 *
80 * Called in response to an xt_some initiated by idle_other_cpus
81 * and stop_other_cpus.
82 *
83 *	Entry:
84 *		%g1 - handler at TL==0
85 *
86 * 	Register Usage:
87 *		%g1 - preserved
88 *		%g4 - pil
89 *
90 * %g1 will either be cpu_idle_self or cpu_stop_self and is
91 * passed to sys_trap, to run at TL=0. No need to worry about
92 * the regp passed to cpu_idle_self/cpu_stop_self, since
93 * neither require arguments.
94 */
95	ENTRY_NP(idle_stop_xcall)
96	rdpr	%pil, %g4
97	cmp	%g4, XCALL_PIL
98	ba,pt	%xcc, sys_trap
99	  movl	%xcc, XCALL_PIL, %g4
100	SET_SIZE(idle_stop_xcall)
101
102#endif	/* lint */
103
104