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 */
35int use_mp = 1;			/* set to come up mp */
36
37/*
38 * Init CPU info - get CPU type info for processor_info system call.
39 */
40void
41init_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 */
88int
89mp_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
104struct mp_find_cpu_arg {
105	int cpuid;		/* set by mp_cpu_configure() */
106	dev_info_t *dip;	/* set by mp_find_cpu() */
107};
108
109int
110mp_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
137out:
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 */
146int
147mp_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
177void
178populate_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