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
init_cpu_info(struct cpu * cp)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
mp_cpu_unconfigure(int cpuid)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
mp_find_cpu(dev_info_t * dip,void * arg)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
mp_cpu_configure(int cpuid)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
populate_idstr(struct cpu * cp)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