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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/machsystm.h> 27 #include <sys/cpu_module.h> 28 #include <sys/dtrace.h> 29 #include <sys/cpu_sgnblk_defs.h> 30 31 /* 32 * Useful for disabling MP bring-up for an MP capable kernel 33 * (a kernel that was built with MP defined) 34 */ 35 int use_mp = 1; /* set to come up mp */ 36 37 /* 38 * Init CPU info - get CPU type info for processor_info system call. 39 */ 40 void 41 init_cpu_info(struct cpu *cp) 42 { 43 processor_info_t *pi = &cp->cpu_type_info; 44 int cpuid = cp->cpu_id; 45 struct cpu_node *cpunode = &cpunodes[cpuid]; 46 47 cp->cpu_fpowner = NULL; /* not used for V9 */ 48 49 /* 50 * Get clock-frequency property from cpunodes[] for the CPU. 51 */ 52 pi->pi_clock = (cpunode->clock_freq + 500000) / 1000000; 53 54 /* 55 * Current frequency in Hz. 56 */ 57 cp->cpu_curr_clock = cpunode->clock_freq; 58 59 /* 60 * Supported frequencies. 61 */ 62 cpu_set_supp_freqs(cp, NULL); 63 64 (void) strcpy(pi->pi_processor_type, "sparcv9"); 65 (void) strcpy(pi->pi_fputypes, "sparcv9"); 66 67 /* 68 * StarFire requires the signature block stuff setup here 69 */ 70 CPU_SGN_MAPIN(cpuid); 71 if (cpuid == cpu0.cpu_id) { 72 /* 73 * cpu0 starts out running. Other cpus are 74 * still in OBP land and we will leave them 75 * alone for now. 76 */ 77 CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid); 78 #ifdef lint 79 cpuid = cpuid; 80 #endif /* lint */ 81 } 82 } 83 84 /* 85 * Routine used to cleanup a CPU that has been powered off. This will 86 * destroy all per-cpu information related to this cpu. 87 */ 88 int 89 mp_cpu_unconfigure(int cpuid) 90 { 91 int retval; 92 void empty_cpu(int); 93 extern int cleanup_cpu_common(int); 94 95 ASSERT(MUTEX_HELD(&cpu_lock)); 96 97 retval = cleanup_cpu_common(cpuid); 98 99 empty_cpu(cpuid); 100 101 return (retval); 102 } 103 104 struct mp_find_cpu_arg { 105 int cpuid; /* set by mp_cpu_configure() */ 106 dev_info_t *dip; /* set by mp_find_cpu() */ 107 }; 108 109 int 110 mp_find_cpu(dev_info_t *dip, void *arg) 111 { 112 extern int get_portid_ddi(dev_info_t *, dev_info_t **); 113 struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg; 114 char *type; 115 int rv = DDI_WALK_CONTINUE; 116 int cpuid; 117 118 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 119 "device_type", &type)) 120 return (DDI_WALK_CONTINUE); 121 122 if (strcmp(type, "cpu") != 0) 123 goto out; 124 125 cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 126 DDI_PROP_DONTPASS, "cpuid", -1); 127 128 if (cpuid == -1) 129 cpuid = get_portid_ddi(dip, NULL); 130 if (cpuid != target->cpuid) 131 goto out; 132 133 /* Found it */ 134 rv = DDI_WALK_TERMINATE; 135 target->dip = dip; 136 137 out: 138 ddi_prop_free(type); 139 return (rv); 140 } 141 142 /* 143 * Routine used to setup a newly inserted CPU in preparation for starting 144 * it running code. 145 */ 146 int 147 mp_cpu_configure(int cpuid) 148 { 149 extern void fill_cpu_ddi(dev_info_t *); 150 extern int setup_cpu_common(int); 151 struct mp_find_cpu_arg target; 152 153 ASSERT(MUTEX_HELD(&cpu_lock)); 154 155 target.dip = NULL; 156 target.cpuid = cpuid; 157 ddi_walk_devs(ddi_root_node(), mp_find_cpu, &target); 158 159 if (target.dip == NULL) 160 return (ENODEV); 161 162 /* 163 * Note: uses cpu_lock to protect cpunodes and ncpunodes 164 * which will be modified inside of fill_cpu_ddi(). 165 */ 166 fill_cpu_ddi(target.dip); 167 168 /* 169 * sun4v cpu setup may fail. sun4u assumes cpu setup to 170 * be always successful, so the return value is ignored. 171 */ 172 (void) setup_cpu_common(cpuid); 173 174 return (0); 175 } 176 177 void 178 populate_idstr(struct cpu *cp) 179 { 180 char buf[CPU_IDSTRLEN]; 181 struct cpu_node *cpunode; 182 processor_info_t *pi; 183 184 cpunode = &cpunodes[cp->cpu_id]; 185 pi = &cp->cpu_type_info; 186 (void) snprintf(buf, sizeof (buf), 187 "%s (portid %d impl 0x%x ver 0x%x clock %d MHz)", 188 cpunode->name, cpunode->portid, cpunode->implementation, 189 cpunode->version, pi->pi_clock); 190 cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP); 191 (void) strcpy(cp->cpu_idstr, buf); 192 193 cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP); 194 (void) strcpy(cp->cpu_brandstr, cpunode->name); 195 196 cmn_err(CE_CONT, "?cpu%d: %s\n", cp->cpu_id, cp->cpu_idstr); 197 } 198