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 2004 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 38 static kdi_dtrace_state_t kdi_dtrace_state = KDI_DTSTATE_IDLE; 39 40 void 41 kdi_dvec_enter(void) 42 { 43 kdi_dvec->dv_enter(); 44 } 45 46 /* 47 * Called on the CPU being initialized 48 */ 49 void 50 kdi_dvec_cpu_init(struct cpu *cp) 51 { 52 kdi_dvec->dv_kctl_cpu_init(); 53 kdi_dvec->dv_cpu_init(cp); 54 } 55 56 #if defined(__i386) || defined(__amd64) 57 void 58 kdi_dvec_idt_sync(gate_desc_t *idt) 59 { 60 kdi_dvec->dv_idt_sync(idt); 61 } 62 #endif /* __i386 || __amd64 */ 63 64 void 65 kdi_dvec_vmready(void) 66 { 67 kdi_dvec->dv_kctl_vmready(); 68 kdi_dvec->dv_vmready(); 69 } 70 71 void 72 kdi_dvec_memavail(void) 73 { 74 /* 75 * The driver will allocate more memory (if requested), and will call 76 * dv_memavail itself. 77 */ 78 kdi_dvec->dv_kctl_memavail(); 79 } 80 81 #if defined(__sparc) 82 void 83 kdi_dvec_cpr_restart(void) 84 { 85 kdi_dvec->dv_kctl_cpu_init(); 86 kdi_dvec->dv_cpr_restart(); 87 } 88 #endif /* __sparc */ 89 90 void 91 kdi_dvec_modavail(void) 92 { 93 kdi_dvec->dv_kctl_modavail(); 94 } 95 96 void 97 kdi_dvec_thravail(void) 98 { 99 kdi_dvec->dv_kctl_thravail(); 100 } 101 102 void 103 kdi_dvec_mod_loaded(struct modctl *modp) 104 { 105 kdi_dvec->dv_mod_loaded(modp); 106 } 107 108 void 109 kdi_dvec_mod_unloading(struct modctl *modp) 110 { 111 kdi_dvec->dv_mod_unloading(modp); 112 } 113 114 kdi_dtrace_state_t 115 kdi_dtrace_get_state(void) 116 { 117 return (kdi_dtrace_state); 118 } 119 120 int 121 kdi_dtrace_set(kdi_dtrace_set_t transition) 122 { 123 kdi_dtrace_state_t new, cur; 124 125 do { 126 cur = kdi_dtrace_state; 127 128 switch (transition) { 129 case KDI_DTSET_DTRACE_ACTIVATE: 130 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE) 131 return (EBUSY); 132 if (cur == KDI_DTSTATE_DTRACE_ACTIVE) 133 return (0); 134 new = KDI_DTSTATE_DTRACE_ACTIVE; 135 break; 136 case KDI_DTSET_DTRACE_DEACTIVATE: 137 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE) 138 return (EBUSY); 139 if (cur == KDI_DTSTATE_IDLE) 140 return (0); 141 new = KDI_DTSTATE_IDLE; 142 break; 143 case KDI_DTSET_KMDB_BPT_ACTIVATE: 144 if (cur == KDI_DTSTATE_DTRACE_ACTIVE) 145 return (EBUSY); 146 if (cur == KDI_DTSTATE_KMDB_BPT_ACTIVE) 147 return (0); 148 new = KDI_DTSTATE_KMDB_BPT_ACTIVE; 149 break; 150 case KDI_DTSET_KMDB_BPT_DEACTIVATE: 151 if (cur == KDI_DTSTATE_DTRACE_ACTIVE) 152 return (EBUSY); 153 if (cur == KDI_DTSTATE_IDLE) 154 return (0); 155 new = KDI_DTSTATE_IDLE; 156 break; 157 default: 158 return (EINVAL); 159 } 160 } while (cas32((uint_t *)&kdi_dtrace_state, cur, new) != cur); 161 162 return (0); 163 } 164