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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/machsystm.h> 29 #include <sys/cpu_module.h> 30 #include <sys/dtrace.h> 31 #include <sys/cpu_sgnblk_defs.h> 32 33 /* 34 * Useful for disabling MP bring-up for an MP capable kernel 35 * (a kernel that was built with MP defined) 36 */ 37 int use_mp = 1; /* set to come up mp */ 38 39 /* 40 * Init CPU info - get CPU type info for processor_info system call. 41 */ 42 void 43 init_cpu_info(struct cpu *cp) 44 { 45 processor_info_t *pi = &cp->cpu_type_info; 46 int cpuid = cp->cpu_id; 47 struct cpu_node *cpunode = &cpunodes[cpuid]; 48 char buf[CPU_IDSTRLEN]; 49 50 cp->cpu_fpowner = NULL; /* not used for V9 */ 51 52 /* 53 * Get clock-frequency property from cpunodes[] for the CPU. 54 */ 55 pi->pi_clock = (cpunode->clock_freq + 500000) / 1000000; 56 57 /* 58 * Current frequency in Hz. 59 */ 60 pi->pi_curr_clock = cpunode->clock_freq; 61 62 (void) strcpy(pi->pi_processor_type, "sparcv9"); 63 (void) strcpy(pi->pi_fputypes, "sparcv9"); 64 65 (void) snprintf(buf, sizeof (buf), 66 "%s (portid %d impl 0x%x ver 0x%x clock %d MHz)", 67 cpunode->name, cpunode->portid, 68 cpunode->implementation, cpunode->version, pi->pi_clock); 69 70 cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP); 71 (void) strcpy(cp->cpu_idstr, buf); 72 73 cmn_err(CE_CONT, "?cpu%d: %s\n", cpuid, cp->cpu_idstr); 74 75 cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP); 76 (void) strcpy(cp->cpu_brandstr, cpunode->name); 77 78 /* 79 * StarFire requires the signature block stuff setup here 80 */ 81 CPU_SGN_MAPIN(cpuid); 82 if (cpuid == cpu0.cpu_id) { 83 /* 84 * cpu0 starts out running. Other cpus are 85 * still in OBP land and we will leave them 86 * alone for now. 87 */ 88 CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid); 89 #ifdef lint 90 cpuid = cpuid; 91 #endif /* lint */ 92 } 93 } 94 95 /* 96 * Routine used to cleanup a CPU that has been powered off. This will 97 * destroy all per-cpu information related to this cpu. 98 */ 99 int 100 mp_cpu_unconfigure(int cpuid) 101 { 102 int retval; 103 void empty_cpu(int); 104 extern int cleanup_cpu_common(int); 105 106 ASSERT(MUTEX_HELD(&cpu_lock)); 107 108 retval = cleanup_cpu_common(cpuid); 109 110 empty_cpu(cpuid); 111 112 return (retval); 113 } 114 115 struct mp_find_cpu_arg { 116 int cpuid; /* set by mp_cpu_configure() */ 117 dev_info_t *dip; /* set by mp_find_cpu() */ 118 }; 119 120 int 121 mp_find_cpu(dev_info_t *dip, void *arg) 122 { 123 extern int get_portid_ddi(dev_info_t *, dev_info_t **); 124 struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg; 125 char *type; 126 int rv = DDI_WALK_CONTINUE; 127 int cpuid; 128 129 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 130 "device_type", &type)) 131 return (DDI_WALK_CONTINUE); 132 133 if (strcmp(type, "cpu") != 0) 134 goto out; 135 136 cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 137 DDI_PROP_DONTPASS, "cpuid", -1); 138 139 if (cpuid == -1) 140 cpuid = get_portid_ddi(dip, NULL); 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_ddi(dev_info_t *); 161 extern int setup_cpu_common(int); 162 struct mp_find_cpu_arg target; 163 164 ASSERT(MUTEX_HELD(&cpu_lock)); 165 166 target.dip = NULL; 167 target.cpuid = cpuid; 168 ddi_walk_devs(ddi_root_node(), mp_find_cpu, &target); 169 170 if (target.dip == NULL) 171 return (ENODEV); 172 173 /* 174 * Note: uses cpu_lock to protect cpunodes and ncpunodes 175 * which will be modified inside of fill_cpu_ddi(). 176 */ 177 fill_cpu_ddi(target.dip); 178 179 /* 180 * sun4v cpu setup may fail. sun4u assumes cpu setup to 181 * be always successful, so the return value is ignored. 182 */ 183 (void) setup_cpu_common(cpuid); 184 185 return (0); 186 } 187