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 * Copyright 2019 Peter Tribble. 27 */ 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 34 /* 35 * Useful for disabling MP bring-up for an MP capable kernel 36 * (a kernel that was built with MP defined) 37 */ 38 int use_mp = 1; /* set to come up mp */ 39 40 /* 41 * Init CPU info - get CPU type info for processor_info system call. 42 */ 43 void 44 init_cpu_info(struct cpu *cp) 45 { 46 processor_info_t *pi = &cp->cpu_type_info; 47 int cpuid = cp->cpu_id; 48 struct cpu_node *cpunode = &cpunodes[cpuid]; 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 cp->cpu_curr_clock = cpunode->clock_freq; 61 62 /* 63 * Supported frequencies. 64 */ 65 cpu_set_supp_freqs(cp, NULL); 66 67 (void) strcpy(pi->pi_processor_type, "sparcv9"); 68 (void) strcpy(pi->pi_fputypes, "sparcv9"); 69 70 if (cpuid == cpu0.cpu_id) { 71 /* 72 * cpu0 starts out running. Other cpus are 73 * still in OBP land and we will leave them 74 * alone for now. 75 */ 76 CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid); 77 #ifdef lint 78 cpuid = cpuid; 79 #endif /* lint */ 80 } 81 } 82 83 /* 84 * Routine used to cleanup a CPU that has been powered off. This will 85 * destroy all per-cpu information related to this cpu. 86 */ 87 int 88 mp_cpu_unconfigure(int cpuid) 89 { 90 int retval; 91 void empty_cpu(int); 92 extern int cleanup_cpu_common(int); 93 94 ASSERT(MUTEX_HELD(&cpu_lock)); 95 96 retval = cleanup_cpu_common(cpuid); 97 98 empty_cpu(cpuid); 99 100 return (retval); 101 } 102 103 struct mp_find_cpu_arg { 104 int cpuid; /* set by mp_cpu_configure() */ 105 dev_info_t *dip; /* set by mp_find_cpu() */ 106 }; 107 108 int 109 mp_find_cpu(dev_info_t *dip, void *arg) 110 { 111 extern int get_portid_ddi(dev_info_t *, dev_info_t **); 112 struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg; 113 char *type; 114 int rv = DDI_WALK_CONTINUE; 115 int cpuid; 116 117 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, 118 "device_type", &type)) 119 return (DDI_WALK_CONTINUE); 120 121 if (strcmp(type, "cpu") != 0) 122 goto out; 123 124 cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip, 125 DDI_PROP_DONTPASS, "cpuid", -1); 126 127 if (cpuid == -1) 128 cpuid = get_portid_ddi(dip, NULL); 129 if (cpuid != target->cpuid) 130 goto out; 131 132 /* Found it */ 133 rv = DDI_WALK_TERMINATE; 134 target->dip = dip; 135 136 out: 137 ddi_prop_free(type); 138 return (rv); 139 } 140 141 /* 142 * Routine used to setup a newly inserted CPU in preparation for starting 143 * it running code. 144 */ 145 int 146 mp_cpu_configure(int cpuid) 147 { 148 extern void fill_cpu_ddi(dev_info_t *); 149 extern int setup_cpu_common(int); 150 struct mp_find_cpu_arg target; 151 152 ASSERT(MUTEX_HELD(&cpu_lock)); 153 154 target.dip = NULL; 155 target.cpuid = cpuid; 156 ddi_walk_devs(ddi_root_node(), mp_find_cpu, &target); 157 158 if (target.dip == NULL) 159 return (ENODEV); 160 161 /* 162 * Note: uses cpu_lock to protect cpunodes and ncpunodes 163 * which will be modified inside of fill_cpu_ddi(). 164 */ 165 fill_cpu_ddi(target.dip); 166 167 /* 168 * sun4v cpu setup may fail. sun4u assumes cpu setup to 169 * be always successful, so the return value is ignored. 170 */ 171 (void) setup_cpu_common(cpuid); 172 173 return (0); 174 } 175 176 void 177 populate_idstr(struct cpu *cp) 178 { 179 char buf[CPU_IDSTRLEN]; 180 struct cpu_node *cpunode; 181 processor_info_t *pi; 182 183 cpunode = &cpunodes[cp->cpu_id]; 184 pi = &cp->cpu_type_info; 185 (void) snprintf(buf, sizeof (buf), 186 "%s (portid %d impl 0x%x ver 0x%x clock %d MHz)", 187 cpunode->name, cpunode->portid, cpunode->implementation, 188 cpunode->version, pi->pi_clock); 189 cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP); 190 (void) strcpy(cp->cpu_idstr, buf); 191 192 cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP); 193 (void) strcpy(cp->cpu_brandstr, cpunode->name); 194 195 cmn_err(CE_CONT, "?cpu%d: %s\n", cp->cpu_id, cp->cpu_idstr); 196 } 197