diff options
author | ian <ian@FreeBSD.org> | 2014-05-13 16:50:10 +0000 |
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committer | ian <ian@FreeBSD.org> | 2014-05-13 16:50:10 +0000 |
commit | a7a560a760a6a276a065a0c0adc367a22e77cabb (patch) | |
tree | a1a5563d2b2a4f279a62a077ddb3c095cd9e1c60 /sys/powerpc/booke | |
parent | 9a6f8ee2e65fcdd6d661fcf9db110303abe1c16e (diff) | |
download | FreeBSD-src-a7a560a760a6a276a065a0c0adc367a22e77cabb.zip FreeBSD-src-a7a560a760a6a276a065a0c0adc367a22e77cabb.tar.gz |
MFC r256792, r256793, r256799 (by nwhitehorn): Unify AIM and booke code.
Diffstat (limited to 'sys/powerpc/booke')
-rw-r--r-- | sys/powerpc/booke/clock.c | 280 | ||||
-rw-r--r-- | sys/powerpc/booke/vm_machdep.c | 408 |
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) -{ - -} - |