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 2006 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 #include <sys/cpuvar.h> 30 #include <sys/kdi_impl.h> 31 #include <sys/reboot.h> 32 #include <sys/errno.h> 33 #include <sys/atomic.h> 34 #include <sys/kmem.h> 35 36 kdi_debugvec_t *kdi_dvec; 37 struct modctl *kdi_dmods; 38 39 static kdi_dtrace_state_t kdi_dtrace_state = KDI_DTSTATE_IDLE; 40 41 void 42 kdi_dvec_enter(void) 43 { 44 kdi_dvec->dv_enter(); 45 } 46 47 /* 48 * Called on the CPU being initialized 49 */ 50 void 51 kdi_dvec_cpu_init(struct cpu *cp) 52 { 53 kdi_dvec->dv_kctl_cpu_init(); 54 kdi_dvec->dv_cpu_init(cp); 55 } 56 57 #if defined(__i386) || defined(__amd64) 58 void 59 kdi_dvec_idt_sync(gate_desc_t *idt) 60 { 61 kdi_dvec->dv_idt_sync(idt); 62 } 63 #endif /* __i386 || __amd64 */ 64 65 void 66 kdi_dvec_vmready(void) 67 { 68 kdi_dvec->dv_kctl_vmready(); 69 kdi_dvec->dv_vmready(); 70 } 71 72 void 73 kdi_dvec_memavail(void) 74 { 75 /* 76 * The driver will allocate more memory (if requested), and will call 77 * dv_memavail itself. 78 */ 79 kdi_dvec->dv_kctl_memavail(); 80 } 81 82 #if defined(__sparc) 83 void 84 kdi_dvec_cpr_restart(void) 85 { 86 kdi_dvec->dv_kctl_cpu_init(); 87 kdi_dvec->dv_cpr_restart(); 88 } 89 #endif /* __sparc */ 90 91 void 92 kdi_dvec_modavail(void) 93 { 94 kdi_dvec->dv_kctl_modavail(); 95 } 96 97 void 98 kdi_dvec_thravail(void) 99 { 100 kdi_dvec->dv_kctl_thravail(); 101 } 102 103 void 104 kdi_dvec_mod_loaded(struct modctl *modp) 105 { 106 kdi_dvec->dv_mod_loaded(modp); 107 } 108 109 void 110 kdi_dvec_mod_unloading(struct modctl *modp) 111 { 112 kdi_dvec->dv_mod_unloading(modp); 113 } 114 115 kdi_dtrace_state_t 116 kdi_dtrace_get_state(void) 117 { 118 return (kdi_dtrace_state); 119 } 120 121 int 122 kdi_dtrace_set(kdi_dtrace_set_t transition) 123 { 124 kdi_dtrace_state_t new, cur; 125 126 do { 127 cur = kdi_dtrace_state; 128 129 switch (transition) { 130 case KDI_DTSET_DTRACE_ACTIVATE: 131 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE) 132 return (EBUSY); 133 if (cur == KDI_DTSTATE_DTRACE_ACTIVE) 134 return (0); 135 new = KDI_DTSTATE_DTRACE_ACTIVE; 136 break; 137 case KDI_DTSET_DTRACE_DEACTIVATE: 138 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE) 139 return (EBUSY); 140 if (cur == KDI_DTSTATE_IDLE) 141 return (0); 142 new = KDI_DTSTATE_IDLE; 143 break; 144 case KDI_DTSET_KMDB_BPT_ACTIVATE: 145 if (cur == KDI_DTSTATE_DTRACE_ACTIVE) 146 return (EBUSY); 147 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE) 148 return (0); 149 new = KDI_DTSTATE_KMDB_BPT_ACTIVE; 150 break; 151 case KDI_DTSET_KMDB_BPT_DEACTIVATE: 152 if (cur == KDI_DTSTATE_DTRACE_ACTIVE) 153 return (EBUSY); 154 if (cur == KDI_DTSTATE_IDLE) 155 return (0); 156 new = KDI_DTSTATE_IDLE; 157 break; 158 default: 159 return (EINVAL); 160 } 161 } while (cas32((uint_t *)&kdi_dtrace_state, cur, new) != cur); 162 163 return (0); 164 } 165