mach_mp_startup.c revision ad8d2eb8adfa2632089d91a93dd415cd4db6a39d
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/machsystm.h>
#include <sys/cpu_module.h>
#include <sys/dtrace.h>
#include <sys/cpu_sgnblk_defs.h>
#include <sys/mdesc.h>
#include <sys/mach_descrip.h>
#include <sys/ldoms.h>
#include <sys/hypervisor_api.h>
#include <sys/soft_state.h>
/*
* Useful for disabling MP bring-up for an MP capable kernel
* (a kernel that was built with MP defined)
*/
int use_mp = 1; /* set to come up mp */
/*
* Init CPU info - get CPU type info for processor_info system call.
*/
void
init_cpu_info(struct cpu *cp)
{
processor_info_t *pi = &cp->cpu_type_info;
int cpuid = cp->cpu_id;
struct cpu_node *cpunode = &cpunodes[cpuid];
char buf[CPU_IDSTRLEN];
cp->cpu_fpowner = NULL; /* not used for V9 */
/*
* Get clock-frequency property from cpunodes[] for the CPU.
*/
pi->pi_clock = (cpunode->clock_freq + 500000) / 1000000;
/*
* Current frequency in Hz.
*/
pi->pi_curr_clock = cpunode->clock_freq;
(void) strcpy(pi->pi_processor_type, "sparcv9");
(void) strcpy(pi->pi_fputypes, "sparcv9");
(void) snprintf(buf, sizeof (buf),
"%s (cpuid %d clock %d MHz)",
cpunode->name, cpunode->cpuid, pi->pi_clock);
cp->cpu_idstr = kmem_alloc(strlen(buf) + 1, KM_SLEEP);
(void) strcpy(cp->cpu_idstr, buf);
cmn_err(CE_CONT, "?cpu%d: %s\n", cpuid, cp->cpu_idstr);
cp->cpu_brandstr = kmem_alloc(strlen(cpunode->name) + 1, KM_SLEEP);
(void) strcpy(cp->cpu_brandstr, cpunode->name);
/*
* StarFire requires the signature block stuff setup here
*/
CPU_SGN_MAPIN(cpuid);
if (cpuid == cpu0.cpu_id) {
/*
* cpu0 starts out running. Other cpus are
* still in OBP land and we will leave them
* alone for now.
*/
CPU_SIGNATURE(OS_SIG, SIGST_RUN, SIGSUBST_NULL, cpuid);
/*
* On first cpu setup, tell hv we are booting
*/
mach_set_soft_state(SIS_TRANSITION,
&SOLARIS_SOFT_STATE_BOOT_MSG);
#ifdef lint
cpuid = cpuid;
#endif /* lint */
}
}
/*
* Routine used to cleanup a CPU that has been powered off. This will
* destroy all per-cpu information related to this cpu.
*/
int
mp_cpu_unconfigure(int cpuid)
{
int retval;
extern void empty_cpu(int);
extern int cleanup_cpu_common(int);
ASSERT(MUTEX_HELD(&cpu_lock));
retval = cleanup_cpu_common(cpuid);
empty_cpu(cpuid);
return (retval);
}
struct mp_find_cpu_arg {
int cpuid; /* set by mp_cpu_configure() */
dev_info_t *dip; /* set by mp_find_cpu() */
};
int
mp_find_cpu(dev_info_t *dip, void *arg)
{
struct mp_find_cpu_arg *target = (struct mp_find_cpu_arg *)arg;
char *type;
int rv = DDI_WALK_CONTINUE;
int cpuid;
if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip,
DDI_PROP_DONTPASS, "device_type", &type))
return (DDI_WALK_CONTINUE);
if (strcmp(type, "cpu") != 0)
goto out;
cpuid = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
DDI_PROP_DONTPASS, "reg", -1);
if (cpuid == -1) {
cmn_err(CE_PANIC, "reg prop not found in cpu node");
}
cpuid = PROM_CFGHDL_TO_CPUID(cpuid);
if (cpuid != target->cpuid)
goto out;
/* Found it */
rv = DDI_WALK_TERMINATE;
target->dip = dip;
out:
ddi_prop_free(type);
return (rv);
}
/*
* Routine used to setup a newly inserted CPU in preparation for starting
* it running code.
*/
int
mp_cpu_configure(int cpuid)
{
extern void fill_cpu(md_t *, mde_cookie_t);
extern int setup_cpu_common(int);
extern int cleanup_cpu_common(int);
extern void setup_exec_unit_mappings(md_t *);
md_t *mdp;
mde_cookie_t rootnode, cpunode = MDE_INVAL_ELEM_COOKIE;
int listsz, i;
mde_cookie_t *listp = NULL;
int num_nodes;
uint64_t cpuid_prop;
cpu_t *cpu;
processorid_t id;
ASSERT(MUTEX_HELD(&cpu_lock));
if ((mdp = md_get_handle()) == NULL)
return (ENODEV);
rootnode = md_root_node(mdp);
ASSERT(rootnode != MDE_INVAL_ELEM_COOKIE);
num_nodes = md_node_count(mdp);
ASSERT(num_nodes > 0);
listsz = num_nodes * sizeof (mde_cookie_t);
listp = kmem_zalloc(listsz, KM_SLEEP);
num_nodes = md_scan_dag(mdp, rootnode, md_find_name(mdp, "cpu"),
md_find_name(mdp, "fwd"), listp);
if (num_nodes < 0)
return (ENODEV);
for (i = 0; i < num_nodes; i++) {
if (md_get_prop_val(mdp, listp[i], "id", &cpuid_prop))
break;
if (cpuid_prop == (uint64_t)cpuid) {
cpunode = listp[i];
break;
}
}
if (cpunode == MDE_INVAL_ELEM_COOKIE)
return (ENODEV);
kmem_free(listp, listsz);
/*
* Note: uses cpu_lock to protect cpunodes
* which will be modified inside of fill_cpu and
* setup_exec_unit_mappings.
*/
fill_cpu(mdp, cpunode);
/*
* Adding a CPU may cause the execution unit sharing
* relationships to change. Update the mappings in
* the cpunode structures.
*/
setup_exec_unit_mappings(mdp);
/* propagate the updated mappings to the CPU structures */
for (id = 0; id < NCPU; id++) {
if ((cpu = cpu_get(id)) == NULL)
continue;
cpu_map_exec_units(cpu);
}
(void) md_fini_handle(mdp);
if ((i = setup_cpu_common(cpuid)) != 0) {
(void) cleanup_cpu_common(cpuid);
return (i);
}
return (0);
}
/*
* Platform-specific actions to be taken when all cpus are running
* in the OS.
*/
void
cpu_mp_init(void)
{
extern void recalc_xc_timeouts();
extern int cif_cpu_mp_ready;
/* N.B. This must happen after xc_init() has run. */
recalc_xc_timeouts();
if (!(domaining_capabilities & DOMAINING_ENABLED))
return;
cif_cpu_mp_ready = 1;
}