Import md bits for mem(4) on arm.
While I'm there, cleanup a bit pmap.h.
This commit is contained in:
cognet
parent
e8fd5617c5
commit
103e95586e
153
sys/arm/arm/mem.c
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153
sys/arm/arm/mem.c
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@ -0,0 +1,153 @@
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/*-
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department, and code derived from software contributed to
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* Berkeley by William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: mem.c 1.13 89/10/08$
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* from: @(#)mem.c 7.2 (Berkeley) 5/9/91
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Memory special file
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*/
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/ioccom.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/memrange.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/signalvar.h>
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#include <sys/systm.h>
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#include <sys/uio.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_extern.h>
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#include <machine/memdev.h>
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/*
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* Used in /dev/mem drivers and elsewhere
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*/
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MALLOC_DEFINE(M_MEMDESC, "memdesc", "memory range descriptors");
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/* ARGSUSED */
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int
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memrw(struct cdev *dev, struct uio *uio, int flags)
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{
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int o;
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u_int c = 0, v;
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struct iovec *iov;
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int error = 0;
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vm_offset_t addr, eaddr;
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GIANT_REQUIRED;
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while (uio->uio_resid > 0 && error == 0) {
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iov = uio->uio_iov;
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if (iov->iov_len == 0) {
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uio->uio_iov++;
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uio->uio_iovcnt--;
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if (uio->uio_iovcnt < 0)
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panic("memrw");
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continue;
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}
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if (minor(dev) == CDEV_MINOR_MEM) {
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v = uio->uio_offset;
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v &= ~PAGE_MASK;
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pmap_kenter((vm_offset_t)_tmppt, v);
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o = (int)uio->uio_offset & PAGE_MASK;
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c = (u_int)(PAGE_SIZE - ((int)iov->iov_base & PAGE_MASK));
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c = min(c, (u_int)(PAGE_SIZE - o));
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c = min(c, (u_int)iov->iov_len);
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error = uiomove((caddr_t)&_tmppt[o], (int)c, uio);
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pmap_qremove((vm_offset_t)_tmppt, 1);
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continue;
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}
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else if (minor(dev) == CDEV_MINOR_KMEM) {
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c = iov->iov_len;
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/*
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* Make sure that all of the pages are currently
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* resident so that we don't create any zero-fill
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* pages.
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*/
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addr = trunc_page(uio->uio_offset);
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eaddr = round_page(uio->uio_offset + c);
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for (; addr < eaddr; addr += PAGE_SIZE)
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if (pmap_extract(kernel_pmap, addr) == 0)
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return (EFAULT);
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if (!kernacc((caddr_t)(int)uio->uio_offset, c,
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uio->uio_rw == UIO_READ ?
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VM_PROT_READ : VM_PROT_WRITE))
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return (EFAULT);
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error = uiomove((caddr_t)(int)uio->uio_offset, (int)c, uio);
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continue;
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}
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/* else panic! */
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}
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return (error);
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}
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/*
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* allow user processes to MMAP some memory sections
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* instead of going through read/write
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*/
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/* ARGSUSED */
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int
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memmmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr,
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int prot __unused)
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{
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if (minor(dev) == CDEV_MINOR_MEM)
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*paddr = offset;
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else if (minor(dev) == CDEV_MINOR_KMEM)
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*paddr = vtophys(offset);
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/* else panic! */
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return (0);
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}
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void
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dev_mem_md_init(void)
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{
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}
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@ -275,6 +275,9 @@ struct msgbuf *msgbufp = 0;
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extern void bcopy_page(vm_offset_t, vm_offset_t);
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extern void bzero_page(vm_offset_t);
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char *_tmppt;
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/*
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* Metadata for L1 translation tables.
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*/
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@ -2496,6 +2499,8 @@ pmap_bootstrap(vm_offset_t firstaddr, vm_offset_t lastaddr, struct pv_addr *l1pt
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round_page(size * sizeof(struct l2_dtable)) / PAGE_SIZE,
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&pmap_kernel_l2dtable_kva, NULL);
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pmap_alloc_specials(&virtual_avail,
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1, (vm_offset_t*)&_tmppt, NULL);
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SLIST_INIT(&l1_list);
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TAILQ_INIT(&l1_lru_list);
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mtx_init(&l1_lru_lock, "l1 list lock", NULL, MTX_DEF);
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38
sys/arm/include/memdev.h
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38
sys/arm/include/memdev.h
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@ -0,0 +1,38 @@
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/*-
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* Copyright (c) 2004 Mark R V Murray
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define CDEV_MAJOR 2
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#define CDEV_MINOR_MEM 0
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#define CDEV_MINOR_KMEM 1
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d_open_t memopen;
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d_read_t memrw;
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d_mmap_t memmmap;
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#define memioctl (d_ioctl_t *)NULL
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void dev_mem_md_init(void);
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@ -57,31 +57,7 @@
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*/
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#define PTE_NOCACHE 0
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#define PTE_CACHE 1
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#define VADDR(pdi, pti) ((vm_offset_t)(((pdi)<<PDR_SHIFT)+((pti)<<PAGE_SHIFT)))
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#define PTDIPDE(ptd) ((ptd)/1024)
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#define PTDIPTE(ptd) ((ptd)%256)
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#ifndef NKPT
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#define NKPT 120 /* actual number of kernel page tables */
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#endif
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#ifndef NKPDE
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#define NKPDE 1019 /* Maximum number of kernel PDE */
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#endif
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#define NPDEPTD 16 /* Number of PDE in each PTD */
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/*
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* The *PTDI values control the layout of virtual memory
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*/
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#define KPTDI (NPDEPG-NKPDE) /* ptd entry for kernel space begin */
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#define PTDPTDI (KPTDI-1) /* ptd entry that points to ptd! */
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#define KPTPTDI (PTDPTDI-1) /* ptd entry for kernel PTEs */
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#define UPTPTDI (KPTPTDI-3) /* ptd entry for uspace PTEs */
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#define UMAXPTDI (UPTPTDI-1) /* ptd entry for user space end */
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#define UMAXPTEOFF (NPTEPG) /* pte entry for user space end */
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#define PTE_PAGETABLE 2
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#ifndef LOCORE
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@ -99,7 +75,7 @@
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#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
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/*
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* Pmap sutff
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* Pmap stuff
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*/
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/*
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@ -175,6 +151,7 @@ typedef struct pmap *pmap_t;
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#ifdef _KERNEL
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extern pmap_t kernel_pmap;
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#define pmap_kernel() kernel_pmap
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#endif
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@ -192,20 +169,6 @@ typedef struct pv_entry {
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#define PV_ENTRY_NULL ((pv_entry_t) 0)
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#define PV_CI 0x01 /* all entries must be cache inhibited */
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#define PV_PTPAGE 0x02 /* entry maps a page table page */
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/*
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* Page hooks.
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* For speed we store the both the virtual address and the page table
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* entry address for each page hook.
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*/
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typedef struct {
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vm_offset_t va;
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pt_entry_t *pte;
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} pagehook_t;
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#ifdef _KERNEL
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boolean_t pmap_get_pde_pte(pmap_t, vm_offset_t, pd_entry_t **, pt_entry_t **);
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@ -496,11 +459,6 @@ void pmap_use_minicache(vm_offset_t, vm_size_t);
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#define pmap_pte_v(pte) l2pte_valid(*(pte))
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#define pmap_pte_pa(pte) l2pte_pa(*(pte))
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/* Size of the kernel part of the L1 page table */
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#define KERNEL_PD_SIZE \
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(L1_TABLE_SIZE - (KERNEL_BASE >> L1_S_SHIFT) * sizeof(pd_entry_t))
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#define PTE_PAGETABLE 2
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/*
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* Flags that indicate attributes of pages or mappings of pages.
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*
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@ -542,6 +500,9 @@ const struct pmap_devmap *pmap_devmap_find_va(vm_offset_t, vm_size_t);
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void pmap_devmap_bootstrap(vm_offset_t, const struct pmap_devmap *);
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void pmap_devmap_register(const struct pmap_devmap *);
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extern char *_tmppt;
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#endif /* _KERNEL */
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#endif /* !LOCORE */
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