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/*
* 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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2015, Joyent, Inc.
*/
#include <sys/cpuvar.h>
#include <sys/stack.h>
#include <vm/seg_kp.h>
#include <sys/machparam.h>
#include <sys/proc.h>
#include <sys/pset.h>
#include <sys/sysmacros.h>
/*
* Create and initialize an interrupt thread.
*/
static void
thread_create_intr(cpu_t *cp)
{
kthread_t *tp;
tp = thread_create(NULL, LL_INTR_STKSZ,
(void (*)())thread_create_intr, NULL, 0, &p0, TS_ONPROC, 0);
/*
* Set the thread in the TS_FREE state. The state will change
* to TS_ONPROC only while the interrupt is active. Think of these
* as being on a private free list for the CPU. Being TS_FREE keeps
* inactive interrupt threads out of debugger thread lists.
*
* We cannot call thread_create with TS_FREE because of the current
* checks there for ONPROC. Fix this when thread_create takes flags.
*/
THREAD_FREEINTR(tp, cp);
/*
* Nobody should ever reference the credentials of an interrupt
* thread so make it NULL to catch any such references.
*/
tp->t_cred = NULL;
tp->t_flag |= T_INTR_THREAD;
tp->t_cpu = cp;
tp->t_bound_cpu = cp;
tp->t_disp_queue = cp->cpu_disp;
tp->t_affinitycnt = 1;
tp->t_preempt = 1;
/*
* Don't make a user-requested binding on this thread so that
* the processor can be offlined.
*/
tp->t_bind_cpu = PBIND_NONE; /* no USER-requested binding */
tp->t_bind_pset = PS_NONE;
#if defined(__x86)
tp->t_stk -= STACK_ALIGN;
*(tp->t_stk) = 0; /* terminate intr thread stack */
#endif
/*
* Link onto CPU's interrupt pool.
*/
tp->t_link = cp->cpu_intr_thread;
cp->cpu_intr_thread = tp;
}
/*
* Allocate a given number of interrupt threads for a given CPU. These threads
* will get freed by cpu_destroy_bound_threads() when the CPU gets unconfigured.
*
* Note, high level interrupts are always serviced using cpu_intr_stack and are
* not allowed to block. Low level interrupts or soft-interrupts use the
* kthread_t's that we create through the calls to thread_create_intr().
*/
void
cpu_intr_alloc(cpu_t *cp, int n)
{
int i;
for (i = 0; i < n; i++)
thread_create_intr(cp);
cp->cpu_intr_stack = (caddr_t)segkp_get(segkp, INTR_STACK_SIZE,
KPD_HASREDZONE | KPD_NO_ANON | KPD_LOCKED) +
INTR_STACK_SIZE - SA(MINFRAME);
}
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