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 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 #include <sys/cpuvar.h>
29 #include <sys/kdi_impl.h>
30 #include <sys/reboot.h>
31 #include <sys/errno.h>
32 #include <sys/atomic.h>
33 #include <sys/kmem.h>
34
35 kdi_debugvec_t *kdi_dvec;
36 struct modctl *kdi_dmods;
37
38 static kdi_dtrace_state_t kdi_dtrace_state = KDI_DTSTATE_IDLE;
39
40 void
kdi_dvec_vmready(void)41 kdi_dvec_vmready(void)
42 {
43 kdi_dvec->dv_kctl_vmready();
44 kdi_dvec->dv_vmready();
45 }
46
47 void
kdi_dvec_memavail(void)48 kdi_dvec_memavail(void)
49 {
50 /*
51 * The driver will allocate more memory (if requested), and will call
52 * dv_memavail itself.
53 */
54 kdi_dvec->dv_kctl_memavail();
55 }
56
57 #if defined(__x86)
58 void
kdi_dvec_handle_fault(greg_t trapno,greg_t pc,greg_t sp,int cpuid)59 kdi_dvec_handle_fault(greg_t trapno, greg_t pc, greg_t sp, int cpuid)
60 {
61 kdi_dvec->dv_handle_fault(trapno, pc, sp, cpuid);
62 }
63 #endif
64
65 #if defined(__sparc)
66 /*
67 * Called on the CPU being initialized
68 */
69 void
kdi_dvec_cpu_init(struct cpu * cp)70 kdi_dvec_cpu_init(struct cpu *cp)
71 {
72 kdi_dvec->dv_kctl_cpu_init();
73 kdi_dvec->dv_cpu_init(cp);
74 }
75
76 void
kdi_dvec_cpr_restart(void)77 kdi_dvec_cpr_restart(void)
78 {
79 kdi_dvec->dv_kctl_cpu_init();
80 kdi_dvec->dv_cpr_restart();
81 }
82 #endif /* __sparc */
83
84 void
kdi_dvec_modavail(void)85 kdi_dvec_modavail(void)
86 {
87 kdi_dvec->dv_kctl_modavail();
88 }
89
90 void
kdi_dvec_thravail(void)91 kdi_dvec_thravail(void)
92 {
93 kdi_dvec->dv_kctl_thravail();
94 }
95
96 void
kdi_dvec_mod_loaded(struct modctl * modp)97 kdi_dvec_mod_loaded(struct modctl *modp)
98 {
99 kdi_dvec->dv_mod_loaded(modp);
100 }
101
102 void
kdi_dvec_mod_unloading(struct modctl * modp)103 kdi_dvec_mod_unloading(struct modctl *modp)
104 {
105 kdi_dvec->dv_mod_unloading(modp);
106 }
107
108 kdi_dtrace_state_t
kdi_dtrace_get_state(void)109 kdi_dtrace_get_state(void)
110 {
111 return (kdi_dtrace_state);
112 }
113
114 int
kdi_dtrace_set(kdi_dtrace_set_t transition)115 kdi_dtrace_set(kdi_dtrace_set_t transition)
116 {
117 kdi_dtrace_state_t new, cur;
118
119 do {
120 cur = kdi_dtrace_state;
121
122 switch (transition) {
123 case KDI_DTSET_DTRACE_ACTIVATE:
124 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE)
125 return (EBUSY);
126 if (cur == KDI_DTSTATE_DTRACE_ACTIVE)
127 return (0);
128 new = KDI_DTSTATE_DTRACE_ACTIVE;
129 break;
130 case KDI_DTSET_DTRACE_DEACTIVATE:
131 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE)
132 return (EBUSY);
133 if (cur == KDI_DTSTATE_IDLE)
134 return (0);
135 new = KDI_DTSTATE_IDLE;
136 break;
137 case KDI_DTSET_KMDB_BPT_ACTIVATE:
138 if (cur == KDI_DTSTATE_DTRACE_ACTIVE)
139 return (EBUSY);
140 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE)
141 return (0);
142 new = KDI_DTSTATE_KMDB_BPT_ACTIVE;
143 break;
144 case KDI_DTSET_KMDB_BPT_DEACTIVATE:
145 if (cur == KDI_DTSTATE_DTRACE_ACTIVE)
146 return (EBUSY);
147 if (cur == KDI_DTSTATE_IDLE)
148 return (0);
149 new = KDI_DTSTATE_IDLE;
150 break;
151 default:
152 return (EINVAL);
153 }
154 } while (cas32((uint_t *)&kdi_dtrace_state, cur, new) != cur);
155
156 return (0);
157 }
158