1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/thread.h>
#include <sys/cpuvar.h>
#include <sys/machsystm.h>
#include <sys/systm.h>
#include <sys/promif.h>
#include <sys/xc_levels.h>
#include <sys/spl.h>
#include <sys/bitmap.h>
/*
* Interrupt another CPU.
* This is useful to make the other CPU go through a trap so that
* it recognizes an address space trap (AST) for preempting a thread.
*
* It is possible to be preempted here and be resumed on the CPU
* being poked, so it isn't an error to poke the current CPU.
* We could check this and still get preempted after the check, so
* we don't bother.
*/
void
poke_cpu(int cpun)
{
if (panicstr)
return;
/*
* We don't need to receive an ACK from the CPU being poked,
* so just send out a directed interrupt.
*/
send_dirint(cpun, XC_CPUPOKE_PIL);
}
/*
* Call a function on a target CPU
*/
void
cpu_call(cpu_t *cp, cpu_call_func_t func, uintptr_t arg1, uintptr_t arg2)
{
cpuset_t set;
if (panicstr)
return;
/*
* Prevent CPU from going off-line
*/
kpreempt_disable();
/*
* If we are on the target CPU, call the function directly, but raise
* the PIL to XC_PIL.
* This guarantees that functions called via cpu_call() can not ever
* interrupt each other.
*/
if (CPU == cp) {
int save_spl = splr(ipltospl(XC_HI_PIL));
(*func)(arg1, arg2);
splx(save_spl);
} else {
CPUSET_ONLY(set, cp->cpu_id);
xc_call((xc_arg_t)arg1, (xc_arg_t)arg2, 0, CPUSET2BV(set),
(xc_func_t)(uintptr_t)func);
}
kpreempt_enable();
}
|
