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 /* 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/machsystm.h> 30 #include <sys/cpu_module.h> 31 #include <sys/dtrace.h> 32 #include <sys/cpu_sgnblk_defs.h> 33 #include <sys/mdesc.h> 34 #include <sys/mach_descrip.h> 35 36 /* 37 * Useful for disabling MP bring-up for an MP capable kernel 38 * (a kernel that was built with MP defined) 39 */ 40 int use_mp = 1; /* set to come up mp */ 41 42 /* 43 * Init CPU info - get CPU type info for processor_info system call. 44 */ 45 void 46 init_cpu_info(struct cpu *cp) 47 { 48 processor_info_t *pi = &cp->cpu_type_info; 49 int cpuid = cp->cpu_id; 50 struct cpu_node *cpunode = &cpunodes[cpuid]; 51 char buf[CPU_IDSTRLEN]; 52 53 cp->cpu_fpowner = NULL; /* not used for V9 */ 54 55 /* 56 * Get clock-frequency property from cpunodes[] for the CPU. 57 */ 58 pi->pi_clock = (cpunode->clock_freq + 500000) / 1000000; 59 60 (void) strcpy(pi->pi_processor_type, "sparcv9"); 61 (void) strcpy(pi->pi_fputypes, "sparcv9"); 62 63 (void) snprintf(buf, sizeof (buf), 64 "%s (cpuid %d clock %d MHz)", 65 cpunode->name, cpunode->cpuid, pi->pi_clock); 66 67 cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP); 68 (void) strcpy(cp->cpu_idstr, buf); 69 70 cmn_err(CE_CONT, "?cpu%d: %s\n", cpuid, cp->cpu_idstr); 71 72 cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP); 73 (void) strcpy(cp->cpu_brandstr, cpunode->name); 74 75 /* 76 * StarFire requires the signature block stuff setup here 77 */ 78 CPU_SGN_MAPIN(cpuid); 79 if (cpuid == cpu0.cpu_id) { 80 /* 81 * cpu0 starts out running. Other cpus are 82 * still in OBP land and we will leave them 83 * alone for now. 84 */ 85 CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid); 86 #ifdef lint 87 cpuid = cpuid; 88 #endif /* lint */ 89 } 90 } 91 92 /* 93 * Routine used to cleanup a CPU that has been powered off. This will 94 * destroy all per-cpu information related to this cpu. 95 */ 96 int 97 mp_cpu_unconfigure(int cpuid) 98 { 99 int retval; 100 extern void empty_cpu(int); 101 extern int cleanup_cpu_common(int); 102 103 ASSERT(MUTEX_HELD(&cpu_lock)); 104 105 retval = cleanup_cpu_common(cpuid); 106 107 empty_cpu(cpuid); 108 109 return (retval); 110 } 111 112 struct mp_find_cpu_arg { 113 int cpuid; /* set by mp_cpu_configure() */ 114 dev_info_t *dip; /* set by mp_find_cpu() */ 115 }; 116 117 int 118 mp_find_cpu(dev_info_t *dip, void *arg) 119 { 120 struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg; 121 char *type; 122 int rv = DDI_WALK_CONTINUE; 123 int cpuid; 124 125 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, 126 DDI_PROP_DONTPASS, "device_type", &type)) 127 return (DDI_WALK_CONTINUE); 128 129 if (strcmp(type, "cpu") != 0) 130 goto out; 131 132 cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 133 DDI_PROP_DONTPASS, "reg", -1); 134 135 if (cpuid == -1) { 136 cmn_err(CE_PANIC, "reg prop not found in cpu node"); 137 } 138 139 cpuid = PROM_CFGHDL_TO_CPUID(cpuid); 140 141 if (cpuid != target->cpuid) 142 goto out; 143 144 /* Found it */ 145 rv = DDI_WALK_TERMINATE; 146 target->dip = dip; 147 148 out: 149 ddi_prop_free(type); 150 return (rv); 151 } 152 153 /* 154 * Routine used to setup a newly inserted CPU in preparation for starting 155 * it running code. 156 */ 157 int 158 mp_cpu_configure(int cpuid) 159 { 160 extern void fill_cpu(md_t *, mde_cookie_t); 161 extern void setup_cpu_common(int); 162 extern void setup_exec_unit_mappings(md_t *); 163 md_t *mdp; 164 mde_cookie_t rootnode, cpunode = MDE_INVAL_ELEM_COOKIE; 165 int listsz, i; 166 mde_cookie_t *listp = NULL; 167 int num_nodes; 168 uint64_t cpuid_prop; 169 170 171 ASSERT(MUTEX_HELD(&cpu_lock)); 172 173 if ((mdp = md_get_handle()) == NULL) 174 return (ENODEV); 175 176 rootnode = md_root_node(mdp); 177 178 ASSERT(rootnode != MDE_INVAL_ELEM_COOKIE); 179 180 num_nodes = md_node_count(mdp); 181 182 ASSERT(num_nodes > 0); 183 184 listsz = num_nodes * sizeof (mde_cookie_t); 185 listp = kmem_zalloc(listsz, KM_SLEEP); 186 187 num_nodes = md_scan_dag(mdp, rootnode, md_find_name(mdp, "cpu"), 188 md_find_name(mdp, "fwd"), listp); 189 190 if (num_nodes < 0) 191 return (ENODEV); 192 193 for (i = 0; i < num_nodes; i++) { 194 if (md_get_prop_val(mdp, listp[i], "id", &cpuid_prop)) 195 break; 196 if (cpuid_prop == (uint64_t)cpuid) { 197 cpunode = listp[i]; 198 break; 199 } 200 } 201 202 if (cpunode == MDE_INVAL_ELEM_COOKIE) 203 return (ENODEV); 204 205 kmem_free(listp, listsz); 206 207 /* 208 * Note: uses cpu_lock to protect cpunodes and ncpunodes 209 * which will be modified inside of fill_cpu and 210 * setup_exec_unit_mappings. 211 */ 212 fill_cpu(mdp, cpunode); 213 214 /* 215 * Remap all the cpunodes' execunit mappings. 216 */ 217 setup_exec_unit_mappings(mdp); 218 219 (void) md_fini_handle(mdp); 220 221 setup_cpu_common(cpuid); 222 223 return (0); 224 } 225