MFC r256792, r256793, r256799 (by nwhitehorn): Unify AIM and booke code.

2 files changed, 0 insertions, 688 deletions

diff --git a/sys/powerpc/booke/clock.c b/sys/powerpc/booke/clock.c
deleted file mode 100644
index 5827e73..0000000
--- a/sys/powerpc/booke/clock.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/*-
- * Copyright (C) 1995, 1996 Wolfgang Solfrank.
- * Copyright (C) 1995, 1996 TooLs GmbH.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by TooLs GmbH.
- * 4. The name of TooLs GmbH may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *	$NetBSD: clock.c,v 1.9 2000/01/19 02:52:19 msaitoh Exp $
- */
-/*
- * Copyright (C) 2001 Benno Rice.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/sysctl.h>
-#include <sys/bus.h>
-#include <sys/interrupt.h>
-#include <sys/ktr.h>
-#include <sys/pcpu.h>
-#include <sys/timeet.h>
-#include <sys/timetc.h>
-
-#include <machine/clock.h>
-#include <machine/intr_machdep.h>
-#include <machine/platform.h>
-#include <machine/psl.h>
-#include <machine/spr.h>
-#include <machine/cpu.h>
-#include <machine/md_var.h>
-
-/*
- * Initially we assume a processor with a bus frequency of 12.5 MHz.
- */
-static int		initialized = 0;
-static u_long		ns_per_tick = 80;
-static u_long		ticks_per_sec = 12500000;
-static u_long		*decr_counts[MAXCPU];
-
-#define	DIFF19041970	2082844800
-
-static int		decr_et_start(struct eventtimer *et,
-    sbintime_t first, sbintime_t period);
-static int		decr_et_stop(struct eventtimer *et);
-static timecounter_get_t decr_get_timecount;
-
-struct decr_state {
-	int	mode;	/* 0 - off, 1 - periodic, 2 - one-shot. */
-	int32_t	div;	/* Periodic divisor. */
-};
-static DPCPU_DEFINE(struct decr_state, decr_state);
-
-static struct eventtimer	decr_et;
-static struct timecounter	decr_timecounter = {
-	decr_get_timecount,	/* get_timecount */
-	0,			/* no poll_pps */
-	~0u,			/* counter_mask */
-	0,			/* frequency */
-	"timebase"		/* name */
-};
-
-/*
- * Decrementer interrupt handler.
- */
-void
-decr_intr(struct trapframe *frame)
-{
-	struct decr_state *s = DPCPU_PTR(decr_state);
-
-	if (!initialized)
-		return;
-
-	(*decr_counts[curcpu])++;
-
-	/*
-	 * Interrupt handler must reset DIS to avoid getting another
-	 * interrupt once EE is enabled.
-	 */
-	mtspr(SPR_TSR, TSR_DIS);
-
-	CTR1(KTR_INTR, "%s: DEC interrupt", __func__);
-
-	if (s->mode == 2)
-		decr_et_stop(NULL);
-
-	if (decr_et.et_active)
-		decr_et.et_event_cb(&decr_et, decr_et.et_arg);
-}
-
-void
-cpu_initclocks(void)
-{
-
-	decr_tc_init();
-	cpu_initclocks_bsp();
-}
-
-/*
- * BSP early initialization.
- */
-void
-decr_init(void)
-{
-	struct cpuref cpu;
-	char buf[32];
-
-	if (platform_smp_get_bsp(&cpu) != 0)
-		platform_smp_first_cpu(&cpu);
-	ticks_per_sec = platform_timebase_freq(&cpu);
-	ns_per_tick = 1000000000 / ticks_per_sec;
-
-	set_cputicker(mftb, ticks_per_sec, 0);
-	snprintf(buf, sizeof(buf), "cpu%d:decrementer", curcpu);
-	intrcnt_add(buf, &decr_counts[curcpu]);
-	decr_et_stop(NULL);
-	initialized = 1;
-}
-
-#ifdef SMP
-/*
- * AP early initialization.
- */
-void
-decr_ap_init(void)
-{
-	char buf[32];
-
-	snprintf(buf, sizeof(buf), "cpu%d:decrementer", curcpu);
-	intrcnt_add(buf, &decr_counts[curcpu]);
-	decr_et_stop(NULL);
-}
-#endif
-
-/*
- * Final initialization.
- */
-void
-decr_tc_init(void)
-{
-
-	decr_timecounter.tc_frequency = ticks_per_sec;
-	tc_init(&decr_timecounter);
-	decr_et.et_name = "decrementer";
-	decr_et.et_flags = ET_FLAGS_PERIODIC | ET_FLAGS_ONESHOT |
-	    ET_FLAGS_PERCPU;
-	decr_et.et_quality = 1000;
-	decr_et.et_frequency = ticks_per_sec;
-	decr_et.et_min_period = (0x00000002LLU << 32) / ticks_per_sec;
-	decr_et.et_max_period = (0xfffffffeLLU << 32) / ticks_per_sec;
-	decr_et.et_start = decr_et_start;
-	decr_et.et_stop = decr_et_stop;
-	decr_et.et_priv = NULL;
-	et_register(&decr_et);
-}
-
-/*
- * Event timer start method.
- */
-static int
-decr_et_start(struct eventtimer *et, sbintime_t first, sbintime_t period)
-{
-	struct decr_state *s = DPCPU_PTR(decr_state);
-	uint32_t fdiv, tcr;
-
-	if (period != 0) {
-		s->mode = 1;
-		s->div = (decr_et.et_frequency * period) >> 32;
-	} else {
-		s->mode = 2;
-		s->div = 0;
-	}
-	if (first != 0)
-		fdiv = (decr_et.et_frequency * first) >> 32;
-	else
-		fdiv = s->div;
-
-	tcr = mfspr(SPR_TCR);
-	tcr |= TCR_DIE;
-	if (s->mode == 1) {
-		mtspr(SPR_DECAR, s->div);
-		tcr |= TCR_ARE;
-	} else
-		tcr &= ~TCR_ARE;
-	mtdec(fdiv);
-	mtspr(SPR_TCR, tcr);
-	return (0);
-}
-
-/*
- * Event timer stop method.
- */
-static int
-decr_et_stop(struct eventtimer *et)
-{
-	struct decr_state *s = DPCPU_PTR(decr_state);
-	uint32_t tcr;
-
-	s->mode = 0;
-	s->div = 0xffffffff;
-	tcr = mfspr(SPR_TCR);
-	tcr &= ~(TCR_DIE | TCR_ARE);
-	mtspr(SPR_TCR, tcr);
-	return (0);
-}
-
-/*
- * Timecounter get method.
- */
-static unsigned
-decr_get_timecount(struct timecounter *tc)
-{
-	quad_t tb;
-
-	tb = mftb();
-	return (tb);
-}
-
-/*
- * Wait for about n microseconds (at least!).
- */
-void
-DELAY(int n)
-{
-	u_quad_t start, end, now;
-
-	start = mftb();
-	end = start + (u_quad_t)ticks_per_sec / (1000000ULL / n);
-	do {
-		now = mftb();
-	} while (now < end || (now > start && end < start));
-}
-
diff --git a/sys/powerpc/booke/vm_machdep.c b/sys/powerpc/booke/vm_machdep.c
deleted file mode 100644
index 4db3976..0000000
--- a/sys/powerpc/booke/vm_machdep.c
+++ /dev/null
@@ -1,408 +0,0 @@
-/*-
- * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
- * Copyright (C) 2006 Semihalf, Rafal Jaworowski <raj@semihalf.com>
- * All rights reserved.
- *
- * Adapted for Freescale's e500 core CPUs.
- * sf_buf implementation was derived from sys/arm/arm/vm_machdep.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *	from: $FreeBSD$
- */
-/*-
- * Copyright (c) 1982, 1986 The Regents of the University of California.
- * Copyright (c) 1989, 1990 William Jolitz
- * Copyright (c) 1994 John Dyson
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * the Systems Programming Group of the University of Utah Computer
- * Science Department, and William Jolitz.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    This product includes software developed by the University of
- *    California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
- *	Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
- */
-/*-
- * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
- * All rights reserved.
- *
- * Author: Chris G. Demetriou
- *
- * Permission to use, copy, modify and distribute this software and
- * its documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
- * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
- *  School of Computer Science
- *  Carnegie Mellon University
- *  Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie the
- * rights to redistribute these changes.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/proc.h>
-#include <sys/malloc.h>
-#include <sys/bio.h>
-#include <sys/buf.h>
-#include <sys/ktr.h>
-#include <sys/lock.h>
-#include <sys/mutex.h>
-#include <sys/vnode.h>
-#include <sys/vmmeter.h>
-#include <sys/kernel.h>
-#include <sys/mbuf.h>
-#include <sys/sf_buf.h>
-#include <sys/syscall.h>
-#include <sys/sysctl.h>
-#include <sys/sysent.h>
-#include <sys/unistd.h>
-
-#include <machine/clock.h>
-#include <machine/cpu.h>
-#include <machine/frame.h>
-#include <machine/md_var.h>
-#include <machine/pcb.h>
-#include <machine/spr.h>
-#include <machine/platform.h>
-
-#include <vm/vm.h>
-#include <vm/vm_param.h>
-#include <vm/vm_kern.h>
-#include <vm/vm_page.h>
-#include <vm/vm_map.h>
-#include <vm/vm_extern.h>
-
-#ifndef NSFBUFS
-#define NSFBUFS		(512 + maxusers * 16)
-#endif
-
-static int nsfbufs;
-static int nsfbufspeak;
-static int nsfbufsused;
-
-SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufs, CTLFLAG_RDTUN, &nsfbufs, 0,
-    "Maximum number of sendfile(2) sf_bufs available");
-SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufspeak, CTLFLAG_RD, &nsfbufspeak, 0,
-    "Number of sendfile(2) sf_bufs at peak usage");
-SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufsused, CTLFLAG_RD, &nsfbufsused, 0,
-    "Number of sendfile(2) sf_bufs in use");
-
-static void sf_buf_init(void *arg);
-SYSINIT(sock_sf, SI_SUB_MBUF, SI_ORDER_ANY, sf_buf_init, NULL);
-
-LIST_HEAD(sf_head, sf_buf);
-
-/* A hash table of active sendfile(2) buffers */
-static struct sf_head *sf_buf_active;
-static u_long sf_buf_hashmask;
-
-#define SF_BUF_HASH(m)  (((m) - vm_page_array) & sf_buf_hashmask)
-
-static TAILQ_HEAD(, sf_buf) sf_buf_freelist;
-static u_int sf_buf_alloc_want;
-
-/*
- * A lock used to synchronize access to the hash table and free list
- */
-static struct mtx sf_buf_lock;
-
-/*
- * Finish a fork operation, with process p2 nearly set up.
- * Copy and update the pcb, set up the stack so that the child
- * ready to run and return to user mode.
- */
-void
-cpu_fork(struct thread *td1, struct proc *p2, struct thread *td2, int flags)
-{
-	struct proc *p1;
-	struct trapframe *tf;
-	struct callframe *cf;
-	struct pcb *pcb;
-
-	KASSERT(td1 == curthread || td1 == &thread0,
-	    ("cpu_fork: p1 not curproc and not proc0"));
-	CTR3(KTR_PROC, "cpu_fork: called td1=%08x p2=%08x flags=%x", (u_int)td1,
-	    (u_int)p2, flags);
-
-	if ((flags & RFPROC) == 0)
-		return;
-
-	p1 = td1->td_proc;
-
-	pcb = (struct pcb *)((td2->td_kstack +
-	    td2->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb)) & ~0x3fU);
-	td2->td_pcb = pcb;
-
-	/* Copy the pcb */
-	bcopy(td1->td_pcb, pcb, sizeof(struct pcb));
-
-	/*
-	 * Create a fresh stack for the new process.
-	 * Copy the trap frame for the return to user mode as if from a
-	 * syscall.  This copies most of the user mode register values.
-	 */
-	tf = (struct trapframe *)pcb - 1;
-	bcopy(td1->td_frame, tf, sizeof(*tf));
-
-	/* Set up trap frame. */
-	tf->fixreg[FIRSTARG] = 0;
-	tf->fixreg[FIRSTARG + 1] = 0;
-	tf->cr &= ~0x10000000;
-
-	td2->td_frame = tf;
-
-	cf = (struct callframe *)tf - 1;
-	memset(cf, 0, sizeof(struct callframe));
-	cf->cf_func = (register_t)fork_return;
-	cf->cf_arg0 = (register_t)td2;
-	cf->cf_arg1 = (register_t)tf;
-
-	pcb->pcb_sp = (register_t)cf;
-	pcb->pcb_lr = (register_t)fork_trampoline;
-
-	/* Setup to release sched_lock in fork_exit(). */
-	td2->td_md.md_spinlock_count = 1;
-	td2->td_md.md_saved_msr = PSL_KERNSET;
-
-	/*
-	 * Now cpu_switch() can schedule the new process.
-	 */
-}
-
-/*
- * Intercept the return address from a freshly forked process that has NOT
- * been scheduled yet.
- *
- * This is needed to make kernel threads stay in kernel mode.
- */
-void
-cpu_set_fork_handler(struct thread *td, void (*func)(void *), void *arg)
-{
-	struct callframe *cf;
-
-	CTR3(KTR_PROC, "cpu_set_fork_handler: called with td=%08x func=%08x arg=%08x",
-	    (u_int)td, (u_int)func, (u_int)arg);
-
-	cf = (struct callframe *)td->td_pcb->pcb_sp;
-
-	cf->cf_func = (register_t)func;
-	cf->cf_arg0 = (register_t)arg;
-}
-
-void
-cpu_exit(struct thread *td)
-{
-
-}
-
-/*
- * Allocate a pool of sf_bufs (sendfile(2) or "super-fast" if you prefer. :-))
- */
-static void
-sf_buf_init(void *arg)
-{
-	struct sf_buf *sf_bufs;
-	vm_offset_t sf_base;
-	int i;
-
-	nsfbufs = NSFBUFS;
-	TUNABLE_INT_FETCH("kern.ipc.nsfbufs", &nsfbufs);
-
-	sf_buf_active = hashinit(nsfbufs, M_TEMP, &sf_buf_hashmask);
-	TAILQ_INIT(&sf_buf_freelist);
-	sf_base = kva_alloc(nsfbufs * PAGE_SIZE);
-	sf_bufs = malloc(nsfbufs * sizeof(struct sf_buf), M_TEMP, M_NOWAIT | M_ZERO);
-
-	for (i = 0; i < nsfbufs; i++) {
-		sf_bufs[i].kva = sf_base + i * PAGE_SIZE;
-		TAILQ_INSERT_TAIL(&sf_buf_freelist, &sf_bufs[i], free_entry);
-	}
-	sf_buf_alloc_want = 0;
-	mtx_init(&sf_buf_lock, "sf_buf", NULL, MTX_DEF);
-}
-
-/*
- * Get an sf_buf from the freelist. Will block if none are available.
- */
-struct sf_buf *
-sf_buf_alloc(struct vm_page *m, int flags)
-{
-	struct sf_head *hash_list;
-	struct sf_buf *sf;
-	int error;
-
-	hash_list = &sf_buf_active[SF_BUF_HASH(m)];
-	mtx_lock(&sf_buf_lock);
-	LIST_FOREACH(sf, hash_list, list_entry) {
-		if (sf->m == m) {
-			sf->ref_count++;
-			if (sf->ref_count == 1) {
-				TAILQ_REMOVE(&sf_buf_freelist, sf, free_entry);
-				nsfbufsused++;
-				nsfbufspeak = imax(nsfbufspeak, nsfbufsused);
-			}
-			goto done;
-		}
-	}
-
-	while ((sf = TAILQ_FIRST(&sf_buf_freelist)) == NULL) {
-		if (flags & SFB_NOWAIT)
-			goto done;
-
-		sf_buf_alloc_want++;
-		SFSTAT_INC(sf_allocwait);
-		error = msleep(&sf_buf_freelist, &sf_buf_lock,
-		    (flags & SFB_CATCH) ? PCATCH | PVM : PVM, "sfbufa", 0);
-		sf_buf_alloc_want--;
-
-		/*
-		 * If we got a signal, don't risk going back to sleep.
-		 */
-		if (error)
-			goto done;
-	}
-
-	TAILQ_REMOVE(&sf_buf_freelist, sf, free_entry);
-	if (sf->m != NULL)
-		LIST_REMOVE(sf, list_entry);
-
-	LIST_INSERT_HEAD(hash_list, sf, list_entry);
-	sf->ref_count = 1;
-	sf->m = m;
-	nsfbufsused++;
-	nsfbufspeak = imax(nsfbufspeak, nsfbufsused);
-	pmap_qenter(sf->kva, &sf->m, 1);
-done:
-	mtx_unlock(&sf_buf_lock);
-	return (sf);
-}
-
-/*
- * Detach mapped page and release resources back to the system.
- *
- * Remove a reference from the given sf_buf, adding it to the free
- * list when its reference count reaches zero. A freed sf_buf still,
- * however, retains its virtual-to-physical mapping until it is
- * recycled or reactivated by sf_buf_alloc(9).
- */
-void
-sf_buf_free(struct sf_buf *sf)
-{
-
-	mtx_lock(&sf_buf_lock);
-	sf->ref_count--;
-	if (sf->ref_count == 0) {
-		TAILQ_INSERT_TAIL(&sf_buf_freelist, sf, free_entry);
-		nsfbufsused--;
-
-		if (sf_buf_alloc_want > 0)
-			wakeup(&sf_buf_freelist);
-	}
-	mtx_unlock(&sf_buf_lock);
-}
-
-/*
- * Software interrupt handler for queued VM system processing.
- */
-void
-swi_vm(void *dummy)
-{
-
-	if (busdma_swi_pending != 0)
-		busdma_swi();
-}
-
-/*
- * Tell whether this address is in some physical memory region.
- * Currently used by the kernel coredump code in order to avoid
- * dumping the ``ISA memory hole'' which could cause indefinite hangs,
- * or other unpredictable behaviour.
- */
-int
-is_physical_memory(vm_offset_t addr)
-{
-
-	/*
-	 * stuff other tests for known memory-mapped devices (PCI?)
-	 * here
-	 */
-	return (1);
-}
-
-/*
- * CPU threading functions related to VM.
- */
-
-void
-cpu_thread_swapin(struct thread *td)
-{
-
-}
-
-void
-cpu_thread_swapout(struct thread *td)
-{
-
-}
-