mach_startup.c revision 07e2e5e8f3dc2fda396ec1f2107273b48f3d974f
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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
* 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 2005 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/archsystm.h>
#include <sys/prom_plat.h>
#include <sys/hypervisor_api.h>
#ifdef TRAPTRACE
#include <sys/traptrace.h>
#include <sys/hypervisor_api.h>
#endif /* TRAPTRACE */
extern void sfmmu_set_tsbs(void);
/*
*/
static int enable_halt_idle_cpus = 1;
void
setup_trap_table(void)
{
extern caddr_t mmu_fault_status_area;
mmfsa_va =
}
void
phys_install_has_changed(void)
{
}
/*
* Halt the present CPU until awoken via an interrupt
*/
static void
cpu_halt(void)
{
int hset_update = 1;
uint_t s;
/*
* If this CPU is online, and there's multiple CPUs
* in the system, then we should notate our halting
* by adding ourselves to the partition's halted CPU
* work becomes available.
*/
hset_update = 0;
/*
* We're on our way to being halted.
* Disable interrupts now, so that we'll awaken immediately
* after halting if someone tries to poke us between now and
* the time we actually halt.
*/
s = disable_vec_intr();
/*
* Add ourselves to the partition's halted CPUs bitmask
* and set our HALTED flag, if necessary.
*
* Note that the memory barrier after updating the HALTED flag
* is needed to ensure that the HALTED flag has reached global
* visibility before scanning the run queue for the last time
* (via disp_anywork) and halting ourself.
*/
if (hset_update) {
}
/*
* Check to make sure there's really nothing to do.
* If work becomes available *after* we do this check
* and it's determined that the work should be ours,
* we won't miss it since we'll be notified with a "poke"
* ...which will pop us right back out of the halted state.
*/
if (disp_anywork()) {
if (hset_update) {
}
enable_vec_intr(s);
return;
}
/*
* Halt the strand
*/
(void) hv_cpu_yield();
/*
* We're no longer halted
*/
enable_vec_intr(s);
if (hset_update) {
}
}
/*
* If "cpu" is halted, then wake it up clearing its halted bit in advance.
* Otherwise, see if other CPUs in the cpu partition are halted and need to
* be woken up so that they can steal the thread we placed on this CPU.
* This function is only used on MP systems.
*/
static void
{
int result;
/*
* Clear the halted bit for that CPU since it will be
* poked in a moment.
*/
/*
* We may find the current CPU present in the halted cpuset
* if we're in the context of an interrupt that occurred
* before we had a chance to clear our bit in cpu_halt().
* Poking ourself is obviously unnecessary, since if
* we're here, we're not halted.
*/
return;
} else {
/*
* This cpu isn't halted, but it's idle or undergoing a
* context switch. No need to awaken anyone else.
*/
return;
}
/*
* No need to wake up other CPUs if the thread we just enqueued
* is bound.
*/
if (bound)
return;
/*
* See if there's any other halted CPUs. If there are, then
* select one, and awaken it.
* It's possible that after we find a CPU, somebody else
* will awaken it before we get the chance.
* In that case, look again.
*/
do {
if (cpu_found == CPUSET_NOTINSET)
return;
} while (result < 0);
}
void
{
if (enable_halt_idle_cpus) {
}
}
int
{
if (mmu_fault_status_area == NULL)
return (-1);
return (0);
}
void
mach_memscrub(void)
{
/* no memscrub support for sun4v for now */
}
void
{
/* no fpras support for sun4v for now */
}
void
mach_hw_copy_limit(void)
{
/* HW copy limits set by individual CPU module */
}
#ifdef TRAPTRACE
/*
* This function sets up hypervisor traptrace buffer
*/
void
{
}
/*
* This function configures and enables the hypervisor traptrace buffer
*/
void
{
"!cpu%d: previous HV traptrace buffer of size 0x%lx "
}
(sizeof (struct htrap_trace_record)), &size);
&prev_enable);
"!cpu%d: HV traptracing not enabled, "
"ta: 0x%x returned error: %d",
}
} else {
"!cpu%d: HV traptrace buffer not configured, "
"ta: 0x%x returned error: %d",
}
/* set hvaddr_base to NULL when traptrace buffer registration fails */
}
}
#endif /* TRAPTRACE */