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 (void) strcpy(pi->pi_processor_type, "sparcv9"); 58 (void) strcpy(pi->pi_fputypes, "sparcv9"); 59 60 (void) snprintf(buf, sizeof (buf), 61 "%s (portid %d impl 0x%x ver 0x%x clock %d MHz)", 62 cpunode->name, cpunode->portid, 63 cpunode->implementation, cpunode->version, pi->pi_clock); 64 65 cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP); 66 (void) strcpy(cp->cpu_idstr, buf); 67 68 cmn_err(CE_CONT, "?cpu%d: %s\n", cpuid, cp->cpu_idstr); 69 70 cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP); 71 (void) strcpy(cp->cpu_brandstr, cpunode->name); 72 73 /* 74 * StarFire requires the signature block stuff setup here 75 */ 76 CPU_SGN_MAPIN(cpuid); 77 if (cpuid == cpu0.cpu_id) { 78 /* 79 * cpu0 starts out running. Other cpus are 80 * still in OBP land and we will leave them 81 * alone for now. 82 */ 83 CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid); 84 #ifdef lint 85 cpuid = cpuid; 86 #endif /* lint */ 87 } 88 } 89 90 /* 91 * Routine used to cleanup a CPU that has been powered off. This will 92 * destroy all per-cpu information related to this cpu. 93 */ 94 int 95 mp_cpu_unconfigure(int cpuid) 96 { 97 int retval; 98 void empty_cpu(int); 99 extern int cleanup_cpu_common(int); 100 101 ASSERT(MUTEX_HELD(&cpu_lock)); 102 103 retval = cleanup_cpu_common(cpuid); 104 105 empty_cpu(cpuid); 106 107 return (retval); 108 } 109 110 struct mp_find_cpu_arg { 111 int cpuid; /* set by mp_cpu_configure() */ 112 dev_info_t *dip; /* set by mp_find_cpu() */ 113 }; 114 115 int 116 mp_find_cpu(dev_info_t *dip, void *arg) 117 { 118 extern int get_portid_ddi(dev_info_t *, dev_info_t **); 119 struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg; 120 char *type; 121 int rv = DDI_WALK_CONTINUE; 122 int cpuid; 123 124 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 125 "device_type", &type)) 126 return (DDI_WALK_CONTINUE); 127 128 if (strcmp(type, "cpu") != 0) 129 goto out; 130 131 cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 132 DDI_PROP_DONTPASS, "cpuid", -1); 133 134 if (cpuid == -1) 135 cpuid = get_portid_ddi(dip, NULL); 136 if (cpuid != target->cpuid) 137 goto out; 138 139 /* Found it */ 140 rv = DDI_WALK_TERMINATE; 141 target->dip = dip; 142 143 out: 144 ddi_prop_free(type); 145 return (rv); 146 } 147 148 /* 149 * Routine used to setup a newly inserted CPU in preparation for starting 150 * it running code. 151 */ 152 int 153 mp_cpu_configure(int cpuid) 154 { 155 extern void fill_cpu_ddi(dev_info_t *); 156 extern int setup_cpu_common(int); 157 struct mp_find_cpu_arg target; 158 159 ASSERT(MUTEX_HELD(&cpu_lock)); 160 161 target.dip = NULL; 162 target.cpuid = cpuid; 163 ddi_walk_devs(ddi_root_node(), mp_find_cpu, &target); 164 165 if (target.dip == NULL) 166 return (ENODEV); 167 168 /* 169 * Note: uses cpu_lock to protect cpunodes and ncpunodes 170 * which will be modified inside of fill_cpu_ddi(). 171 */ 172 fill_cpu_ddi(target.dip); 173 174 /* 175 * sun4v cpu setup may fail. sun4u assumes cpu setup to 176 * be always successful, so the return value is ignored. 177 */ 178 (void) setup_cpu_common(cpuid); 179 180 return (0); 181 } 182