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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/cpuvar.h>
27 #include <sys/kdi_impl.h>
28 #include <sys/reboot.h>
29 #include <sys/errno.h>
30 #include <sys/atomic.h>
31 #include <sys/kmem.h>
32
33 kdi_debugvec_t *kdi_dvec;
34 struct modctl *kdi_dmods;
35
36 static kdi_dtrace_state_t kdi_dtrace_state = KDI_DTSTATE_IDLE;
37
38 void
kdi_dvec_vmready(void)39 kdi_dvec_vmready(void)
40 {
41 kdi_dvec->dv_kctl_vmready();
42 kdi_dvec->dv_vmready();
43 }
44
45 void
kdi_dvec_memavail(void)46 kdi_dvec_memavail(void)
47 {
48 /*
49 * The driver will allocate more memory (if requested), and will call
50 * dv_memavail itself.
51 */
52 kdi_dvec->dv_kctl_memavail();
53 }
54
55 #if defined(__x86)
56 void
kdi_dvec_handle_fault(greg_t trapno,greg_t pc,greg_t sp,int cpuid)57 kdi_dvec_handle_fault(greg_t trapno, greg_t pc, greg_t sp, int cpuid)
58 {
59 kdi_dvec->dv_handle_fault(trapno, pc, sp, cpuid);
60 }
61 #endif
62
63 #if defined(__sparc)
64 /*
65 * Called on the CPU being initialized
66 */
67 void
kdi_dvec_cpu_init(struct cpu * cp)68 kdi_dvec_cpu_init(struct cpu *cp)
69 {
70 kdi_dvec->dv_kctl_cpu_init();
71 kdi_dvec->dv_cpu_init(cp);
72 }
73
74 void
kdi_dvec_cpr_restart(void)75 kdi_dvec_cpr_restart(void)
76 {
77 kdi_dvec->dv_kctl_cpu_init();
78 kdi_dvec->dv_cpr_restart();
79 }
80 #endif /* __sparc */
81
82 void
kdi_dvec_modavail(void)83 kdi_dvec_modavail(void)
84 {
85 kdi_dvec->dv_kctl_modavail();
86 }
87
88 void
kdi_dvec_thravail(void)89 kdi_dvec_thravail(void)
90 {
91 kdi_dvec->dv_kctl_thravail();
92 }
93
94 void
kdi_dvec_mod_loaded(struct modctl * modp)95 kdi_dvec_mod_loaded(struct modctl *modp)
96 {
97 kdi_dvec->dv_mod_loaded(modp);
98 }
99
100 void
kdi_dvec_mod_unloading(struct modctl * modp)101 kdi_dvec_mod_unloading(struct modctl *modp)
102 {
103 kdi_dvec->dv_mod_unloading(modp);
104 }
105
106 kdi_dtrace_state_t
kdi_dtrace_get_state(void)107 kdi_dtrace_get_state(void)
108 {
109 return (kdi_dtrace_state);
110 }
111
112 int
kdi_dtrace_set(kdi_dtrace_set_t transition)113 kdi_dtrace_set(kdi_dtrace_set_t transition)
114 {
115 kdi_dtrace_state_t new, cur;
116
117 do {
118 cur = kdi_dtrace_state;
119
120 switch (transition) {
121 case KDI_DTSET_DTRACE_ACTIVATE:
122 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE)
123 return (EBUSY);
124 if (cur == KDI_DTSTATE_DTRACE_ACTIVE)
125 return (0);
126 new = KDI_DTSTATE_DTRACE_ACTIVE;
127 break;
128 case KDI_DTSET_DTRACE_DEACTIVATE:
129 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE)
130 return (EBUSY);
131 if (cur == KDI_DTSTATE_IDLE)
132 return (0);
133 new = KDI_DTSTATE_IDLE;
134 break;
135 case KDI_DTSET_KMDB_BPT_ACTIVATE:
136 if (cur == KDI_DTSTATE_DTRACE_ACTIVE)
137 return (EBUSY);
138 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE)
139 return (0);
140 new = KDI_DTSTATE_KMDB_BPT_ACTIVE;
141 break;
142 case KDI_DTSET_KMDB_BPT_DEACTIVATE:
143 if (cur == KDI_DTSTATE_DTRACE_ACTIVE)
144 return (EBUSY);
145 if (cur == KDI_DTSTATE_IDLE)
146 return (0);
147 new = KDI_DTSTATE_IDLE;
148 break;
149 default:
150 return (EINVAL);
151 }
152 } while (atomic_cas_32((uint_t *)&kdi_dtrace_state, cur, new) != cur);
153
154 return (0);
155 }
156