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