From ab3f12c3ce0418bd00365022d2d998fbe567279d Mon Sep 17 00:00:00 2001 From: alc Date: Mon, 22 Mar 2004 08:08:25 +0000 Subject: [PATCH] Add an implementation of uiomove_fromphys() to sparc64. This implementation could be characterized as a hybrid of the amd64 and i386 implementations. Specifically, the direct virtual-to-physical mapping is used if possible and sf_buf_alloc() is used if the direct map cannot. --- sys/conf/files.sparc64 | 1 + sys/sparc64/sparc64/uio_machdep.c | 146 ++++++++++++++++++++++++++++++ 2 files changed, 147 insertions(+) create mode 100644 sys/sparc64/sparc64/uio_machdep.c diff --git a/sys/conf/files.sparc64 b/sys/conf/files.sparc64 index 520ceb2fa3a..6670cce258e 100644 --- a/sys/conf/files.sparc64 +++ b/sys/conf/files.sparc64 @@ -104,6 +104,7 @@ sparc64/sparc64/tick.c standard sparc64/sparc64/tlb.c standard sparc64/sparc64/trap.c standard sparc64/sparc64/tsb.c standard +sparc64/sparc64/uio_machdep.c standard sparc64/sparc64/vm_machdep.c standard # ukbdmap.h optional ukbd_dflt_keymap \ diff --git a/sys/sparc64/sparc64/uio_machdep.c b/sys/sparc64/sparc64/uio_machdep.c new file mode 100644 index 00000000000..ea6671731ce --- /dev/null +++ b/sys/sparc64/sparc64/uio_machdep.c @@ -0,0 +1,146 @@ +/* + * Copyright (c) 2004 Alan L. Cox + * Copyright (c) 1982, 1986, 1991, 1993 + * The Regents of the University of California. All rights reserved. + * (c) UNIX System Laboratories, Inc. + * All or some portions of this file are derived from material licensed + * to the University of California by American Telephone and Telegraph + * Co. or Unix System Laboratories, Inc. and are reproduced herein with + * the permission of UNIX System Laboratories, Inc. + * + * 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. + * + * @(#)kern_subr.c 8.3 (Berkeley) 1/21/94 + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include + +/* + * Implement uiomove(9) from physical memory using a combination + * of the direct mapping and sf_bufs to reduce the creation and + * destruction of ephemeral mappings. + */ +int +uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio) +{ + struct sf_buf *sf; + struct thread *td = curthread; + struct iovec *iov; + void *cp; + vm_offset_t page_offset; + vm_paddr_t pa; + vm_page_t m; + size_t cnt; + int error = 0; + int save = 0; + + KASSERT(uio->uio_rw == UIO_READ || uio->uio_rw == UIO_WRITE, + ("uiomove_fromphys: mode")); + KASSERT(uio->uio_segflg != UIO_USERSPACE || uio->uio_td == curthread, + ("uiomove_fromphys proc")); + if (td != NULL) { + mtx_lock_spin(&sched_lock); + save = td->td_flags & TDF_DEADLKTREAT; + td->td_flags |= TDF_DEADLKTREAT; + mtx_unlock_spin(&sched_lock); + } + while (n > 0 && uio->uio_resid) { + iov = uio->uio_iov; + cnt = iov->iov_len; + if (cnt == 0) { + uio->uio_iov++; + uio->uio_iovcnt--; + continue; + } + if (cnt > n) + cnt = n; + page_offset = offset & PAGE_MASK; + cnt = min(cnt, PAGE_SIZE - page_offset); + m = ma[offset >> PAGE_SHIFT]; + pa = VM_PAGE_TO_PHYS(m); + if (m->md.color != DCACHE_COLOR(pa)) { + sf = sf_buf_alloc(m); + cp = (char *)sf_buf_kva(sf) + page_offset; + } else { + sf = NULL; + cp = (char *)TLB_PHYS_TO_DIRECT(pa) + page_offset; + } + switch (uio->uio_segflg) { + case UIO_USERSPACE: + if (ticks - PCPU_GET(switchticks) >= hogticks) + uio_yield(); + if (uio->uio_rw == UIO_READ) + error = copyout(cp, iov->iov_base, cnt); + else + error = copyin(iov->iov_base, cp, cnt); + if (error) + goto out; + break; + case UIO_SYSSPACE: + if (uio->uio_rw == UIO_READ) + bcopy(cp, iov->iov_base, cnt); + else + bcopy(iov->iov_base, cp, cnt); + break; + case UIO_NOCOPY: + break; + } + if (sf != NULL) + sf_buf_free(sf); + iov->iov_base = (char *)iov->iov_base + cnt; + iov->iov_len -= cnt; + uio->uio_resid -= cnt; + uio->uio_offset += cnt; + offset += cnt; + n -= cnt; + } +out: + if (td != NULL && save == 0) { + mtx_lock_spin(&sched_lock); + td->td_flags &= ~TDF_DEADLKTREAT; + mtx_unlock_spin(&sched_lock); + } + return (error); +} -- 2.45.2