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--- xnu/xnu-12377.101.15/bsd/dev/memdev.c
+++ /dev/null
@@ -1,769 +0,0 @@
-/*
- * Copyright (c) 2004-2019 Apple Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1988 University of Utah.
- * Copyright (c) 1990, 1993
- * 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.
- *
- * 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: Utah Hdr: vn.c 1.13 94/04/02
- *
- * from: @(#)vn.c 8.6 (Berkeley) 4/1/94
- * $FreeBSD: src/sys/dev/vn/vn.c,v 1.105.2.4 2001/11/18 07:11:00 dillon Exp $
- */
-
-/*
- * RAM disk driver.
- *
- * Block interface to a ramdisk.
- *
- */
-
-#include <sys/param.h>
-#include <sys/kernel.h>
-#include <sys/mount.h>
-#include <sys/namei.h>
-#include <sys/proc.h>
-#include <sys/buf.h>
-#include <sys/malloc.h>
-#include <sys/mount.h>
-#include <sys/fcntl.h>
-#include <sys/conf.h>
-#include <sys/disk.h>
-#include <sys/stat.h>
-#include <sys/vm.h>
-#include <sys/uio_internal.h>
-#include <libkern/libkern.h>
-
-#include <vm/pmap.h>
-#include <vm/vm_pager_xnu.h>
-#include <mach/memory_object_types.h>
-#include <kern/debug.h>
-
-#include <miscfs/devfs/devfs.h>
-
-
-void mdevinit(int the_cnt);
-
-static open_close_fcn_t mdevopen;
-static open_close_fcn_t mdevclose;
-static psize_fcn_t mdevsize;
-static strategy_fcn_t mdevstrategy;
-static int mdevbioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p);
-static int mdevcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p);
-static int mdevrw(dev_t dev, struct uio *uio, int ioflag);
-
-#ifdef CONFIG_MEMDEV_INSECURE
-static char * nonspace(char *pos, char *end);
-static char * getspace(char *pos, char *end);
-static char * cvtnum(char *pos, char *end, uint64_t *num);
-#endif /* CONFIG_MEMDEV_INSECURE */
-
-extern void bcopy_phys(addr64_t from, addr64_t to, vm_size_t bytes);
-extern void mapping_set_mod(ppnum_t pn);
-extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
-
-/*
- * Maximal number of memory devices.
- */
-#define NB_MAX_MDEVICES (16)
-
-/*
- * cdevsw
- * D_DISK we want to look like a disk
- * D_CANFREE We support B_FREEBUF
- */
-
-static const struct bdevsw mdevbdevsw = {
- .d_open = mdevopen,
- .d_close = mdevclose,
- .d_strategy = mdevstrategy,
- .d_ioctl = mdevbioctl,
- .d_dump = eno_dump,
- .d_psize = mdevsize,
- .d_type = D_DISK,
-};
-
-static const struct cdevsw mdevcdevsw = {
- .d_open = mdevopen,
- .d_close = mdevclose,
- .d_read = mdevrw,
- .d_write = mdevrw,
- .d_ioctl = mdevcioctl,
- .d_stop = eno_stop,
- .d_reset = eno_reset,
- .d_ttys = NULL,
- .d_select = eno_select,
- .d_mmap = eno_mmap,
- .d_strategy = eno_strat,
- .d_reserved_1 = eno_getc,
- .d_reserved_2 = eno_putc,
- .d_type = D_DISK,
-};
-
-struct mdev {
- uint64_t mdBase; /* base page number (pages are assumed to be 4K). Multiply by 4096 to find actual address */
- uint32_t mdSize; /* size in pages (pages are assumed to be 4K). Multiply by 4096 to find actual size. */
- int mdFlags; /* flags */
- int mdSecsize; /* sector size */
- int mdBDev; /* Block device number */
- int mdCDev; /* Character device number */
- void * mdbdevb;
- void * mdcdevb;
-} mdev[NB_MAX_MDEVICES];
-
-/* mdFlags */
-#define mdInited 0x01 /* This device defined */
-#define mdRO 0x02 /* This device is read-only */
-#define mdPhys 0x04 /* This device is in physical memory */
-
-int mdevBMajor = -1;
-int mdevCMajor = -1;
-
-static int mdevioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p, int is_char);
-dev_t mdevadd(int devid, uint64_t base, unsigned int size, int phys);
-dev_t mdevlookup(int devid);
-void mdevremoveall(void);
-int mdevgetrange(int devid, uint64_t *base, uint64_t *size);
-
-static int
-mdevclose(__unused dev_t dev, __unused int flags,
- __unused int devtype, __unused struct proc *p)
-{
- return 0;
-}
-
-static int
-mdevopen(dev_t dev, int flags, __unused int devtype, __unused struct proc *p)
-{
- int devid;
-
- devid = minor(dev); /* Get minor device number */
-
- if (devid >= NB_MAX_MDEVICES || devid < 0) {
- return ENXIO; /* Not valid */
- }
- if ((flags & FWRITE) && (mdev[devid].mdFlags & mdRO)) {
- return EACCES; /* Currently mounted RO */
- }
- return 0;
-}
-
-static int
-mdevrw(dev_t dev, struct uio *uio, __unused int ioflag)
-{
- int status;
- addr64_t mdata;
- int devid;
- enum uio_seg saveflag;
- int count;
-
- devid = minor(dev); /* Get minor device number */
-
- if (devid >= NB_MAX_MDEVICES || devid < 0) {
- return ENXIO; /* Not valid */
- }
- if (!(mdev[devid].mdFlags & mdInited)) {
- return ENXIO; /* Have we actually been defined yet? */
- }
- if (uio->uio_offset < 0) {
- return EINVAL; /* invalid offset */
- }
- if (uio_resid(uio) < 0) {
- return EINVAL;
- }
- mdata = ((addr64_t)mdev[devid].mdBase << 12) + uio->uio_offset; /* Point to the area in "file" */
-
- saveflag = uio->uio_segflg; /* Remember what the request is */
- /* Make sure we are moving from physical ram if physical device */
- if (mdev[devid].mdFlags & mdPhys) {
- if (uio->uio_segflg == UIO_USERSPACE64) {
- uio->uio_segflg = UIO_PHYS_USERSPACE64;
- } else if (uio->uio_segflg == UIO_USERSPACE32) {
- uio->uio_segflg = UIO_PHYS_USERSPACE32;
- } else {
- uio->uio_segflg = UIO_PHYS_USERSPACE;
- }
- }
-
- if (uio->uio_offset > (mdev[devid].mdSize << 12)) {
- count = 0;
- } else {
- count = imin(uio_resid(uio), (mdev[devid].mdSize << 12) - uio->uio_offset);
- }
-
- status = uiomove64(mdata, count, uio); /* Move the data */
- uio->uio_segflg = saveflag; /* Restore the flag */
-
- return status;
-}
-
-static void
-mdevstrategy(struct buf *bp)
-{
- unsigned int left, lop, csize;
- vm_offset_t vaddr, blkoff;
- int devid;
- addr64_t paddr, fvaddr;
- ppnum_t pp;
-
- devid = minor(buf_device(bp)); /* Get minor device number */
-
- if ((mdev[devid].mdFlags & mdInited) == 0) { /* Have we actually been defined yet? */
- buf_seterror(bp, ENXIO);
- buf_biodone(bp);
- return;
- }
-
- buf_setresid(bp, buf_count(bp)); /* Set byte count */
-
- blkoff = buf_blkno(bp) * mdev[devid].mdSecsize; /* Get offset into file */
-
-/*
- * Note that reading past end is an error, but reading at end is an EOF. For these
- * we just return with resid == count.
- */
-
- if (blkoff >= (mdev[devid].mdSize << 12)) { /* Are they trying to read/write at/after end? */
- if (blkoff != (mdev[devid].mdSize << 12)) { /* Are we trying to read after EOF? */
- buf_seterror(bp, EINVAL); /* Yeah, this is an error */
- }
- buf_biodone(bp); /* Return */
- return;
- }
-
- if ((blkoff + buf_count(bp)) > (mdev[devid].mdSize << 12)) { /* Will this read go past end? */
- buf_setcount(bp, (uint32_t)((mdev[devid].mdSize << 12) - blkoff)); /* Yes, trim to max */
- }
- /*
- * make sure the buffer's data area is
- * accessible
- */
- if (buf_map(bp, (caddr_t *)&vaddr)) {
- panic("ramstrategy: buf_map failed");
- }
-
- fvaddr = (mdev[devid].mdBase << 12) + blkoff; /* Point to offset into ram disk */
-
- if (buf_flags(bp) & B_READ) { /* Is this a read? */
- if (!(mdev[devid].mdFlags & mdPhys)) { /* Physical mapped disk? */
- bcopy((void *)((uintptr_t)fvaddr),
- (void *)vaddr, (size_t)buf_count(bp)); /* This is virtual, just get the data */
- } else {
- left = buf_count(bp); /* Init the amount left to copy */
- while (left) { /* Go until it is all copied */
- lop = min((4096 - (vaddr & 4095)), (4096 - (fvaddr & 4095))); /* Get smallest amount left on sink and source */
- csize = min(lop, left); /* Don't move more than we need to */
-
- pp = pmap_find_phys(kernel_pmap, (addr64_t)((uintptr_t)vaddr)); /* Get the sink physical address */
- if (!pp) { /* Not found, what gives? */
- panic("mdevstrategy: sink address %016llX not mapped", (addr64_t)((uintptr_t)vaddr));
- }
- paddr = (addr64_t)(((addr64_t)pp << 12) | (addr64_t)(vaddr & 4095)); /* Get actual address */
- bcopy_phys(fvaddr, paddr, csize); /* Copy this on in */
- mapping_set_mod((ppnum_t)(paddr >> 12)); /* Make sure we know that it is modified */
-
- left = left - csize; /* Calculate what is left */
- vaddr = vaddr + csize; /* Move to next sink address */
- fvaddr = fvaddr + csize; /* Bump to next physical address */
- }
- }
- } else { /* This is a write */
- if (!(mdev[devid].mdFlags & mdPhys)) { /* Physical mapped disk? */
- bcopy((void *)vaddr, (void *)((uintptr_t)fvaddr),
- (size_t)buf_count(bp)); /* This is virtual, just put the data */
- } else {
- left = buf_count(bp); /* Init the amount left to copy */
- while (left) { /* Go until it is all copied */
- lop = min((4096 - (vaddr & 4095)), (4096 - (fvaddr & 4095))); /* Get smallest amount left on sink and source */
- csize = min(lop, left); /* Don't move more than we need to */
-
- pp = pmap_find_phys(kernel_pmap, (addr64_t)((uintptr_t)vaddr)); /* Get the source physical address */
- if (!pp) { /* Not found, what gives? */
- panic("mdevstrategy: source address %016llX not mapped", (addr64_t)((uintptr_t)vaddr));
- }
- paddr = (addr64_t)(((addr64_t)pp << 12) | (addr64_t)(vaddr & 4095)); /* Get actual address */
-
- bcopy_phys(paddr, fvaddr, csize); /* Move this on out */
-
- left = left - csize; /* Calculate what is left */
- vaddr = vaddr + csize; /* Move to next sink address */
- fvaddr = fvaddr + csize; /* Bump to next physical address */
- }
- }
- }
- /*
- * buf_unmap takes care of all the cases
- * it will unmap the buffer from kernel
- * virtual space if that was the state
- * when we mapped it.
- */
- buf_unmap(bp);
-
- buf_setresid(bp, 0); /* Nothing more to do */
- buf_biodone(bp); /* Say we've finished */
-}
-
-static int
-mdevbioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
-{
- return mdevioctl(dev, cmd, data, flag, p, 0);
-}
-
-static int
-mdevcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
-{
- return mdevioctl(dev, cmd, data, flag, p, 1);
-}
-
-static int
-mdevioctl(dev_t dev, u_long cmd, caddr_t data, __unused int flag,
- struct proc *p, int is_char)
-{
- int error;
- u_int32_t *f;
- u_int64_t *o;
- int devid;
- dk_memdev_info_t * memdev_info;
-
- devid = minor(dev); /* Get minor device number */
-
- if (devid >= NB_MAX_MDEVICES || devid < 0) {
- return ENXIO; /* Not valid */
- }
- error = proc_suser(p); /* Are we superman? */
- if (error) {
- return error; /* Nope... */
- }
- f = (u_int32_t*)data;
- o = (u_int64_t *)data;
- memdev_info = (dk_memdev_info_t *) data;
-
- switch (cmd) {
- case DKIOCGETMAXBLOCKCOUNTREAD:
- *o = 32;
- break;
-
- case DKIOCGETMAXBLOCKCOUNTWRITE:
- *o = 32;
- break;
-
- case DKIOCGETMAXSEGMENTCOUNTREAD:
- *o = 32;
- break;
-
- case DKIOCGETMAXSEGMENTCOUNTWRITE:
- *o = 32;
- break;
-
- case DKIOCGETBLOCKSIZE:
- *f = mdev[devid].mdSecsize;
- break;
-
- case DKIOCSETBLOCKSIZE:
- if (is_char) {
- return ENODEV; /* We can only do this for a block */
- }
- if (*f < DEV_BSIZE) {
- return EINVAL; /* Too short? */
- }
- mdev[devid].mdSecsize = *f; /* set the new block size */
- break;
-
- case DKIOCISWRITABLE:
- *f = 1;
- break;
-
- case DKIOCGETBLOCKCOUNT:
- if (!(mdev[devid].mdFlags & mdInited)) {
- return ENXIO;
- }
- *o = ((mdev[devid].mdSize << 12) + mdev[devid].mdSecsize - 1) / mdev[devid].mdSecsize;
- break;
-
- /*
- * We're interested in the following bits of information:
- * Are you a memory-backed device (always yes, in this case)?
- * Physical memory (mdPhys)?
- * What is your base page?
- * What is your size?
- */
- case DKIOCGETMEMDEVINFO:
- if (!(mdev[devid].mdFlags & mdInited)) {
- return ENXIO;
- }
- memdev_info->mi_mdev = TRUE;
- memdev_info->mi_phys = (mdev[devid].mdFlags & mdPhys) ? TRUE : FALSE;
- memdev_info->mi_base = (uint32_t)mdev[devid].mdBase;
- memdev_info->mi_size = mdev[devid].mdSize;
- break;
-
- default:
- error = ENOTTY;
- break;
- }
- return error;
-}
-
-
-static int
-mdevsize(dev_t dev)
-{
- int devid;
-
- devid = minor(dev); /* Get minor device number */
- if (devid >= NB_MAX_MDEVICES || devid < 0) {
- return ENXIO; /* Not valid */
- }
- if ((mdev[devid].mdFlags & mdInited) == 0) {
- return -1; /* Not inited yet */
- }
- return mdev[devid].mdSecsize;
-}
-
-#include <pexpert/pexpert.h>
-
-void
-mdevinit(__unused int the_cnt)
-{
-#ifdef CONFIG_MEMDEV_INSECURE
-
- int devid, phys;
- uint64_t base;
- uint64_t size;
- char *ba, *lp;
- dev_t dev;
-
-
- ba = PE_boot_args(); /* Get the boot arguments */
- lp = ba + 256; /* Point to the end */
-
- while (1) { /* Step through, looking for our keywords */
- phys = 0; /* Assume virtual memory device */
- ba = nonspace(ba, lp); /* Find non-space */
- if (ba >= lp) {
- return; /* We are done if no more... */
- }
- if (((ba[0] != 'v') && (ba[0] != 'p'))
- || (ba[1] != 'm') || (ba[2] != 'd') || (ba[4] != '=')
- || (ba[3] < '0') || (ba[3] > 'f')
- || ((ba[3] > '9') && (ba[3] < 'a'))) { /* Is this of form "vmdx=" or "pmdx=" where x is hex digit? */
- ba = getspace(ba, lp); /* Find next white space or end */
- continue; /* Start looking for the next one */
- }
-
- if (ba[0] == 'p') {
- phys = 1; /* Set physical memory disk */
- }
- devid = ba[3] & 0xF; /* Assume digit */
- if (ba[3] > '9') {
- devid += 9; /* Adjust for hex digits */
- }
- ba = &ba[5]; /* Step past keyword */
- ba = cvtnum(ba, lp, &base); /* Convert base of memory disk */
- if (ba >= lp) {
- return; /* Malformed one at the end, leave */
- }
- if (ba[0] != '.') {
- continue; /* If not length separater, try next... */
- }
- if (base & 0xFFF) {
- continue; /* Only allow page aligned stuff */
- }
- ba++; /* Step past '.' */
- ba = cvtnum(ba, lp, &size); /* Try to convert it */
- if (!size || (size & 0xFFF)) {
- continue; /* Allow only non-zer page size multiples */
- }
- if (ba < lp) { /* If we are not at end, check end character */
- if ((ba[0] != ' ') && (ba[0] != 0)) {
- continue; /* End must be null or space */
- }
- }
-
- dev = mdevadd(devid, base >> 12, (unsigned)size >> 12, phys); /* Go add the device */
- }
-
-#endif /* CONFIG_MEMDEV_INSECURE */
-
- return;
-}
-
-#ifdef CONFIG_MEMDEV_INSECURE
-
-char *
-nonspace(char *pos, char *end) /* Find next non-space in string */
-{
- if (pos >= end) {
- return end; /* Don't go past end */
- }
- if (pos[0] == 0) {
- return end; /* If at null, make end */
- }
- while (1) { /* Keep going */
- if (pos[0] != ' ') {
- return pos; /* Leave if we found one */
- }
- pos++; /* Stop */
- if (pos >= end) {
- return end; /* Quit if we run off end */
- }
- }
-}
-
-char *
-getspace(char *pos, char *end) /* Find next non-space in string */
-{
- while (1) { /* Keep going */
- if (pos >= end) {
- return end; /* Don't go past end */
- }
- if (pos[0] == 0) {
- return end; /* Leave if we hit null */
- }
- if (pos[0] == ' ') {
- return pos; /* Leave if we found one */
- }
- pos++; /* Stop */
- }
-}
-
-char *
-cvtnum(char *pos, char *end, uint64_t *num) /* Convert to a number */
-{
- int rad, dig;
-
- *num = 0; /* Set answer to 0 to start */
- rad = 10;
-
- if (pos >= end) {
- return end; /* Don't go past end */
- }
- if (pos[0] == 0) {
- return end; /* If at null, make end */
- }
- if (pos[0] == '0' && ((pos[1] == 'x') || (pos[1] == 'x'))) { /* A hex constant? */
- rad = 16;
- pos += 2; /* Point to the number */
- }
-
- while (1) { /* Convert it */
- if (pos >= end) {
- return end; /* Don't go past end */
- }
- if (pos[0] == 0) {
- return end; /* If at null, make end */
- }
- if (pos[0] < '0') {
- return pos; /* Leave if non-digit */
- }
- dig = pos[0] & 0xF; /* Extract digit */
- if (pos[0] > '9') { /* Is it bigger than 9? */
- if (rad == 10) {
- return pos; /* Leave if not base 10 */
- }
- if (!(((pos[0] >= 'A') && (pos[0] <= 'F'))
- || ((pos[0] >= 'a') && (pos[0] <= 'f')))) {
- return pos; /* Leave if bogus char */
- }
- dig = dig + 9; /* Adjust for character */
- }
- *num = (*num * rad) + dig; /* Accumulate the number */
- pos++; /* Step on */
- }
-}
-
-#endif /* CONFIG_MEMDEV_INSECURE */
-
-dev_t
-mdevadd(int devid, uint64_t base, unsigned int size, int phys)
-{
- int i;
-
- if (devid < 0) {
- devid = -1;
- for (i = 0; i < NB_MAX_MDEVICES; i++) { /* Search all known memory devices */
- if (!(mdev[i].mdFlags & mdInited)) { /* Is this a free one? */
- if (devid < 0) {
- devid = i; /* Remember first free one */
- }
- continue; /* Skip check */
- }
- if (!(((base + size - 1) < mdev[i].mdBase) || ((mdev[i].mdBase + mdev[i].mdSize - 1) < base))) { /* Is there any overlap? */
- panic("mdevadd: attempt to add overlapping memory device at %016llX-%016llX", mdev[i].mdBase, mdev[i].mdBase + mdev[i].mdSize - 1);
- }
- }
- if (devid < 0) { /* Do we have free slots? */
- panic("mdevadd: attempt to add more than %d memory devices", NB_MAX_MDEVICES);
- }
- } else {
- if (devid >= NB_MAX_MDEVICES) { /* Giving us something bogus? */
- panic("mdevadd: attempt to explicitly add a bogus memory device: %08X", devid);
- }
- if (mdev[devid].mdFlags & mdInited) { /* Already there? */
- panic("mdevadd: attempt to explicitly add a previously defined memory device: %08X", devid);
- }
- }
-
- if (mdevBMajor < 0) { /* Have we gotten a major number yet? */
- mdevBMajor = bdevsw_add(-1, &mdevbdevsw); /* Add to the table and figure out a major number */
- if (mdevBMajor < 0) {
- printf("mdevadd: error - bdevsw_add() returned %d\n", mdevBMajor);
- return -1;
- }
- }
-
- if (mdevCMajor < 0) { /* Have we gotten a major number yet? */
- mdevCMajor = cdevsw_add_with_bdev(-1, &mdevcdevsw, mdevBMajor); /* Add to the table and figure out a major number */
- if (mdevCMajor < 0) {
- printf("ramdevice_init: error - cdevsw_add() returned %d\n", mdevCMajor);
- return -1;
- }
- }
-
- mdev[devid].mdBDev = makedev(mdevBMajor, devid); /* Get the device number */
- mdev[devid].mdbdevb = devfs_make_node(mdev[devid].mdBDev, DEVFS_BLOCK, /* Make the node */
- UID_ROOT, GID_OPERATOR,
- 0600, "md%d", devid);
- if (mdev[devid].mdbdevb == NULL) { /* Did we make one? */
- printf("mdevadd: devfs_make_node for block failed!\n");
- return -1; /* Nope... */
- }
-
- mdev[devid].mdCDev = makedev(mdevCMajor, devid); /* Get the device number */
- mdev[devid].mdcdevb = devfs_make_node(mdev[devid].mdCDev, DEVFS_CHAR, /* Make the node */
- UID_ROOT, GID_OPERATOR,
- 0600, "rmd%d", devid);
- if (mdev[devid].mdcdevb == NULL) { /* Did we make one? */
- printf("mdevadd: devfs_make_node for character failed!\n");
- return -1; /* Nope... */
- }
-
- mdev[devid].mdBase = base; /* Set the base address of ram disk */
- mdev[devid].mdSize = size; /* Set the length of the ram disk */
- mdev[devid].mdSecsize = DEV_BSIZE; /* Set starting block size */
- if (phys) {
- mdev[devid].mdFlags |= mdPhys; /* Show that we are in physical memory */
- }
- mdev[devid].mdFlags |= mdInited; /* Show we are all set up */
- printf("Added memory device md%x/rmd%x (%08X/%08X) at %016llX for %016llX\n",
- devid, devid, mdev[devid].mdBDev, mdev[devid].mdCDev, base << 12, (uint64_t)size << 12);
- return mdev[devid].mdBDev;
-}
-
-
-dev_t
-mdevlookup(int devid)
-{
- if ((devid < 0) || (devid >= NB_MAX_MDEVICES)) {
- return -1; /* Filter any bogus requests */
- }
- if (!(mdev[devid].mdFlags & mdInited)) {
- return -1; /* This one hasn't been defined */
- }
- return mdev[devid].mdBDev; /* Return the device number */
-}
-
-void
-mdevremoveall(void)
-{
- int i;
-
- for (i = 0; i < NB_MAX_MDEVICES; i++) {
- if (!(mdev[i].mdFlags & mdInited)) {
- continue; /* Ignore unused mdevs */
- }
- devfs_remove(mdev[i].mdbdevb); /* Remove the block device */
- devfs_remove(mdev[i].mdcdevb); /* Remove the character device */
-
- mdev[i].mdBase = 0; /* Clear the mdev's storage */
- mdev[i].mdSize = 0;
- mdev[i].mdSecsize = 0;
- mdev[i].mdFlags = 0;
- mdev[i].mdBDev = 0;
- mdev[i].mdCDev = 0;
- mdev[i].mdbdevb = 0;
- mdev[i].mdcdevb = 0;
- }
-}
-
-int
-mdevgetrange(int devid, uint64_t *base, uint64_t *size)
-{
- assert(base);
- assert(size);
-
- /* filter invalid request */
- if ((devid < 0) || (devid >= NB_MAX_MDEVICES)) {
- return -1;
- }
-
- /* filter non-initialized memory devices */
- if ((mdev[devid].mdFlags & mdInited) == 0) {
- return -1;
- }
-
- *base = mdev[devid].mdBase << 12;
- *size = mdev[devid].mdSize << 12;
-
- /* make sure (base, size) is a valid range and will not overflow */
- assert(*size < (UINT64_MAX - *base));
-
- return 0;
-}