diff options
Diffstat (limited to 'sys/kern/kern__physio.c')
| -rw-r--r-- | sys/kern/kern__physio.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/sys/kern/kern__physio.c b/sys/kern/kern__physio.c deleted file mode 100644 index 1e08acd734d1..000000000000 --- a/sys/kern/kern__physio.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Copyright (c) 1989, 1990, 1991, 1992 William F. Jolitz, TeleMuse - * 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 software is a component of "386BSD" developed by - William F. Jolitz, TeleMuse. - * 4. Neither the name of the developer nor the name "386BSD" - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ - * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS - * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. - * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT - * NOT MAKE USE THIS WORK. - * - * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED - * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN - * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES - * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING - * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND - * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE - * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS - * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. - * - * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER 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. - * - * $Id: kern__physio.c,v 1.2 1993/10/16 15:24:06 rgrimes Exp $ - */ - -#include "param.h" -#include "systm.h" -#include "buf.h" -#include "conf.h" -#include "proc.h" -#include "malloc.h" -#include "vnode.h" -#include "vm/vm.h" -#include "specdev.h" - -static physio(int (*)(), int, int, int, caddr_t, int *, struct proc *); - -/* - * Driver interface to do "raw" I/O in the address space of a - * user process directly for read and write operations.. - */ - -rawread(dev, uio) - dev_t dev; struct uio *uio; -{ - return (uioapply(physio, cdevsw[major(dev)].d_strategy, dev, uio)); -} - -rawwrite(dev, uio) - dev_t dev; struct uio *uio; -{ - return (uioapply(physio, cdevsw[major(dev)].d_strategy, dev, uio)); -} - -static physio(strat, dev, off, rw, base, len, p) - int (*strat)(); - dev_t dev; - int rw, off; - caddr_t base; - int *len; - struct proc *p; -{ - register struct buf *bp; - int amttodo = *len, error, amtdone; - vm_prot_t ftype; - static zero; - caddr_t adr; - - rw = rw == UIO_READ ? B_READ : 0; - - /* create and build a buffer header for a transfer */ - bp = (struct buf *)malloc(sizeof(*bp), M_TEMP, M_NOWAIT); - bzero((char *)bp, sizeof(*bp)); /* 09 Sep 92*/ - bp->b_flags = B_BUSY | B_PHYS | rw; - bp->b_proc = p; - bp->b_dev = dev; - bp->b_error = 0; - bp->b_blkno = off/DEV_BSIZE; - amtdone = 0; - - /* iteratively do I/O on as large a chunk as possible */ - do { - bp->b_flags &= ~B_DONE; - bp->b_un.b_addr = base; - /* XXX limit */ - bp->b_bcount = min (256*1024, amttodo); - - /* first, check if accessible */ - if (rw == B_READ && !useracc(base, bp->b_bcount, B_WRITE)) { - free(bp, M_TEMP); - return (EFAULT); - } - if (rw == B_WRITE && !useracc(base, bp->b_bcount, B_READ)) { - free(bp, M_TEMP); - return (EFAULT); - } - - /* update referenced and dirty bits, handle copy objects */ - if (rw == B_READ) - ftype = VM_PROT_READ | VM_PROT_WRITE; - else - ftype = VM_PROT_READ; -/* 09 Sep 92*/ for (adr = (caddr_t)trunc_page(base); adr < base + bp->b_bcount; - adr += NBPG) { - vm_fault(&curproc->p_vmspace->vm_map, - adr, ftype, FALSE); - *(int *) adr += zero; - } - - /* lock in core */ - vslock (base, bp->b_bcount); - - /* perform transfer */ - physstrat(bp, strat, PRIBIO); - - /* unlock */ - vsunlock (base, bp->b_bcount, 0); - amtdone = bp->b_bcount - bp->b_resid; - amttodo -= amtdone; - base += amtdone; - bp->b_blkno += amtdone/DEV_BSIZE; - } while (amttodo && (bp->b_flags & B_ERROR) == 0 && amtdone > 0); - - error = bp->b_error; - free(bp, M_TEMP); - *len = amttodo; - return (error); -} |