Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/ixgbe/@/arm/arm/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/ixgbe/@/arm/arm/mem.c |
/*- * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. * 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 code derived from software contributed to * Berkeley by 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. * 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: Utah $Hdr: mem.c 1.13 89/10/08$ * from: @(#)mem.c 7.2 (Berkeley) 5/9/91 */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/arm/arm/mem.c 217519 2011-01-17 23:06:47Z jkim $"); /* * Memory special file */ #include <sys/param.h> #include <sys/conf.h> #include <sys/fcntl.h> #include <sys/ioccom.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/memrange.h> #include <sys/module.h> #include <sys/mutex.h> #include <sys/proc.h> #include <sys/signalvar.h> #include <sys/systm.h> #include <sys/uio.h> #include <vm/vm.h> #include <vm/pmap.h> #include <vm/vm_extern.h> #include <machine/memdev.h> #include <machine/vmparam.h> /* * Used in /dev/mem drivers and elsewhere */ MALLOC_DEFINE(M_MEMDESC, "memdesc", "memory range descriptors"); struct mem_range_softc mem_range_softc; /* ARGSUSED */ int memrw(struct cdev *dev, struct uio *uio, int flags) { int o; u_int c = 0, v; struct iovec *iov; int error = 0; vm_offset_t addr, eaddr; GIANT_REQUIRED; while (uio->uio_resid > 0 && error == 0) { iov = uio->uio_iov; if (iov->iov_len == 0) { uio->uio_iov++; uio->uio_iovcnt--; if (uio->uio_iovcnt < 0) panic("memrw"); continue; } if (dev2unit(dev) == CDEV_MINOR_MEM) { int i; int address_valid = 0; v = uio->uio_offset; v &= ~PAGE_MASK; for (i = 0; dump_avail[i] || dump_avail[i + 1]; i += 2) { if (v >= dump_avail[i] && v < dump_avail[i + 1]) { address_valid = 1; break; } } if (!address_valid) return (EINVAL); pmap_kenter((vm_offset_t)_tmppt, v); o = (int)uio->uio_offset & PAGE_MASK; c = (u_int)(PAGE_SIZE - ((int)iov->iov_base & PAGE_MASK)); c = min(c, (u_int)(PAGE_SIZE - o)); c = min(c, (u_int)iov->iov_len); error = uiomove((caddr_t)&_tmppt[o], (int)c, uio); pmap_qremove((vm_offset_t)_tmppt, 1); continue; } else if (dev2unit(dev) == CDEV_MINOR_KMEM) { c = iov->iov_len; /* * Make sure that all of the pages are currently * resident so that we don't create any zero-fill * pages. */ addr = trunc_page(uio->uio_offset); eaddr = round_page(uio->uio_offset + c); for (; addr < eaddr; addr += PAGE_SIZE) if (pmap_extract(kernel_pmap, addr) == 0) return (EFAULT); if (!kernacc((caddr_t)(int)uio->uio_offset, c, uio->uio_rw == UIO_READ ? VM_PROT_READ : VM_PROT_WRITE)) #ifdef ARM_USE_SMALL_ALLOC if (addr <= VM_MAXUSER_ADDRESS || addr >= KERNBASE) #endif return (EFAULT); error = uiomove((caddr_t)(int)uio->uio_offset, (int)c, uio); continue; } /* else panic! */ } return (error); } /* * allow user processes to MMAP some memory sections * instead of going through read/write */ /* ARGSUSED */ int memmmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, int prot __unused, vm_memattr_t *memattr __unused) { if (dev2unit(dev) == CDEV_MINOR_MEM) *paddr = offset; else if (dev2unit(dev) == CDEV_MINOR_KMEM) *paddr = vtophys(offset); /* else panic! */ return (0); }