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 2007 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 #include <sys/ldoms.h> 36 #include <sys/hypervisor_api.h> 37 #include <sys/soft_state.h> 38 39 /* 40 * Useful for disabling MP bring-up for an MP capable kernel 41 * (a kernel that was built with MP defined) 42 */ 43 int use_mp = 1; /* set to come up mp */ 44 45 /* 46 * Init CPU info - get CPU type info for processor_info system call. 47 */ 48 void 49 init_cpu_info(struct cpu *cp) 50 { 51 processor_info_t *pi = &cp->cpu_type_info; 52 int cpuid = cp->cpu_id; 53 struct cpu_node *cpunode = &cpunodes[cpuid]; 54 char buf[CPU_IDSTRLEN]; 55 56 cp->cpu_fpowner = NULL; /* not used for V9 */ 57 58 /* 59 * Get clock-frequency property from cpunodes[] for the CPU. 60 */ 61 pi->pi_clock = (cpunode->clock_freq + 500000) / 1000000; 62 63 /* 64 * Current frequency in Hz. 65 */ 66 cp->cpu_curr_clock = cpunode->clock_freq; 67 68 (void) strcpy(pi->pi_processor_type, "sparcv9"); 69 (void) strcpy(pi->pi_fputypes, "sparcv9"); 70 71 (void) snprintf(buf, sizeof (buf), 72 "%s (cpuid %d clock %d MHz)", 73 cpunode->name, cpunode->cpuid, pi->pi_clock); 74 75 cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP); 76 (void) strcpy(cp->cpu_idstr, buf); 77 78 cmn_err(CE_CONT, "?cpu%d: %s\n", cpuid, cp->cpu_idstr); 79 80 cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP); 81 (void) strcpy(cp->cpu_brandstr, cpunode->name); 82 83 /* 84 * StarFire requires the signature block stuff setup here 85 */ 86 CPU_SGN_MAPIN(cpuid); 87 if (cpuid == cpu0.cpu_id) { 88 /* 89 * cpu0 starts out running. Other cpus are 90 * still in OBP land and we will leave them 91 * alone for now. 92 */ 93 CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid); 94 /* 95 * On first cpu setup, tell hv we are booting 96 */ 97 mach_set_soft_state(SIS_TRANSITION, 98 &SOLARIS_SOFT_STATE_BOOT_MSG); 99 #ifdef lint 100 cpuid = cpuid; 101 #endif /* lint */ 102 } 103 } 104 105 /* 106 * Routine used to cleanup a CPU that has been powered off. This will 107 * destroy all per-cpu information related to this cpu. 108 */ 109 int 110 mp_cpu_unconfigure(int cpuid) 111 { 112 int retval; 113 extern void empty_cpu(int); 114 extern int cleanup_cpu_common(int); 115 116 ASSERT(MUTEX_HELD(&cpu_lock)); 117 118 retval = cleanup_cpu_common(cpuid); 119 120 empty_cpu(cpuid); 121 122 return (retval); 123 } 124 125 struct mp_find_cpu_arg { 126 int cpuid; /* set by mp_cpu_configure() */ 127 dev_info_t *dip; /* set by mp_find_cpu() */ 128 }; 129 130 int 131 mp_find_cpu(dev_info_t *dip, void *arg) 132 { 133 struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg; 134 char *type; 135 int rv = DDI_WALK_CONTINUE; 136 int cpuid; 137 138 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, 139 DDI_PROP_DONTPASS, "device_type", &type)) 140 return (DDI_WALK_CONTINUE); 141 142 if (strcmp(type, "cpu") != 0) 143 goto out; 144 145 cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 146 DDI_PROP_DONTPASS, "reg", -1); 147 148 if (cpuid == -1) { 149 cmn_err(CE_PANIC, "reg prop not found in cpu node"); 150 } 151 152 cpuid = PROM_CFGHDL_TO_CPUID(cpuid); 153 154 if (cpuid != target->cpuid) 155 goto out; 156 157 /* Found it */ 158 rv = DDI_WALK_TERMINATE; 159 target->dip = dip; 160 161 out: 162 ddi_prop_free(type); 163 return (rv); 164 } 165 166 /* 167 * Routine used to setup a newly inserted CPU in preparation for starting 168 * it running code. 169 */ 170 int 171 mp_cpu_configure(int cpuid) 172 { 173 extern void fill_cpu(md_t *, mde_cookie_t); 174 extern int setup_cpu_common(int); 175 extern int cleanup_cpu_common(int); 176 extern void setup_exec_unit_mappings(md_t *); 177 178 md_t *mdp; 179 mde_cookie_t rootnode, cpunode = MDE_INVAL_ELEM_COOKIE; 180 int listsz, i; 181 mde_cookie_t *listp = NULL; 182 int num_nodes; 183 uint64_t cpuid_prop; 184 cpu_t *cpu; 185 processorid_t id; 186 187 ASSERT(MUTEX_HELD(&cpu_lock)); 188 189 if ((mdp = md_get_handle()) == NULL) 190 return (ENODEV); 191 192 rootnode = md_root_node(mdp); 193 194 ASSERT(rootnode != MDE_INVAL_ELEM_COOKIE); 195 196 num_nodes = md_node_count(mdp); 197 198 ASSERT(num_nodes > 0); 199 200 listsz = num_nodes * sizeof (mde_cookie_t); 201 listp = kmem_zalloc(listsz, KM_SLEEP); 202 203 num_nodes = md_scan_dag(mdp, rootnode, md_find_name(mdp, "cpu"), 204 md_find_name(mdp, "fwd"), listp); 205 206 if (num_nodes < 0) 207 return (ENODEV); 208 209 for (i = 0; i < num_nodes; i++) { 210 if (md_get_prop_val(mdp, listp[i], "id", &cpuid_prop)) 211 break; 212 if (cpuid_prop == (uint64_t)cpuid) { 213 cpunode = listp[i]; 214 break; 215 } 216 } 217 218 if (cpunode == MDE_INVAL_ELEM_COOKIE) 219 return (ENODEV); 220 221 kmem_free(listp, listsz); 222 223 /* 224 * Note: uses cpu_lock to protect cpunodes 225 * which will be modified inside of fill_cpu and 226 * setup_exec_unit_mappings. 227 */ 228 fill_cpu(mdp, cpunode); 229 230 /* 231 * Adding a CPU may cause the execution unit sharing 232 * relationships to change. Update the mappings in 233 * the cpunode structures. 234 */ 235 setup_exec_unit_mappings(mdp); 236 237 /* propagate the updated mappings to the CPU structures */ 238 for (id = 0; id < NCPU; id++) { 239 if ((cpu = cpu_get(id)) == NULL) 240 continue; 241 242 cpu_map_exec_units(cpu); 243 } 244 245 (void) md_fini_handle(mdp); 246 247 if ((i = setup_cpu_common(cpuid)) != 0) { 248 (void) cleanup_cpu_common(cpuid); 249 return (i); 250 } 251 252 return (0); 253 } 254 255 /* 256 * Platform-specific actions to be taken when all cpus are running 257 * in the OS. 258 */ 259 void 260 cpu_mp_init(void) 261 { 262 extern void recalc_xc_timeouts(); 263 extern int cif_cpu_mp_ready; 264 265 /* N.B. This must happen after xc_init() has run. */ 266 recalc_xc_timeouts(); 267 268 if (!(domaining_capabilities & DOMAINING_ENABLED)) 269 return; 270 271 cif_cpu_mp_ready = 1; 272 } 273