bsd/dev/memdev.c

178 dev_t mdevadd(int devid, uint64_t base, unsigned int size, int phys);
179 dev_t mdevlookup(int devid);
190 	int devid;
192 	devid = minor(dev);									/* Get minor device number */
194 	if (devid > 16) return (ENXIO);						/* Not valid */
196 	if ((flags & FWRITE) && (mdev[devid].mdFlags & mdRO)) return (EACCES);	/* Currently mounted RO */
204 	int 			devid;
207 	devid = minor(dev);									/* Get minor device number */
209 	if (devid > 16) return (ENXIO);						/* Not valid */
210 	if (!(mdev[devid].mdFlags & mdInited))  return (ENXIO);	/* Have we actually been defined yet? */
212 	mdata = ((addr64_t)mdev[devid].mdBase << 12) + uio->uio_offset;	/* Point to the area in "file" */
221 	if (mdev[devid].mdFlags & mdPhys) {
238 	int devid;
242 	devid = minor(buf_device(bp));							/* Get minor device number */
244 	if ((mdev[devid].mdFlags & mdInited) == 0) {		/* Have we actually been defined yet? */
252 	blkoff = buf_blkno(bp) * mdev[devid].mdSecsize;		/* Get offset into file */
259 	if (blkoff >= (mdev[devid].mdSize << 12)) {			/* Are they trying to read/write at/after end? */
260 		if(blkoff != (mdev[devid].mdSize << 12)) {		/* Are we trying to read after EOF? */
267 	if ((blkoff + buf_count(bp)) > (mdev[devid].mdSize << 12)) {		/* Will this read go past end? */
268 		buf_setcount(bp, ((mdev[devid].mdSize << 12) - blkoff));	/* Yes, trim to max */
277 	fvaddr = (mdev[devid].mdBase << 12) + blkoff;		/* Point to offset into ram disk */
280 		if(!(mdev[devid].mdFlags & mdPhys)) {			/* Physical mapped disk? */
306 		if(!(mdev[devid].mdFlags & mdPhys)) {			/* Physical mapped disk? */
356 	int devid;
358 	devid = minor(dev);									/* Get minor device number */
360 	if (devid > 16) return (ENXIO);						/* Not valid */
387 			*f = mdev[devid].mdSecsize;
395 			mdev[devid].mdSecsize = *f;					/* set the new block size */
403 			if(!(mdev[devid].mdFlags & mdInited)) return (ENXIO);
404 			*f = ((mdev[devid].mdSize << 12) + mdev[devid].mdSecsize - 1) / mdev[devid].mdSecsize;
408 			if(!(mdev[devid].mdFlags & mdInited)) return (ENXIO);
409 			*o = ((mdev[devid].mdSize << 12) + mdev[devid].mdSecsize - 1) / mdev[devid].mdSecsize;
422 	int devid;
424 	devid = minor(dev);									/* Get minor device number */
425 	if (devid > 16) return (ENXIO);						/* Not valid */
427 	if ((mdev[devid].mdFlags & mdInited) == 0) return(-1);		/* Not inited yet */
429 	return(mdev[devid].mdSecsize);
438 	int devid, phys;
463 		devid = ba[3] & 0xF;							/* Assume digit */
464 		if(ba[3] > '9') devid += 9;						/* Adjust for hex digits */
479 		dev = mdevadd(devid, base >> 12, (unsigned)size >> 12, phys);	/* Go add the device */
546 dev_t mdevadd(int devid, uint64_t base, unsigned int size, int phys) {
550 	if(devid < 0) {
552 		devid = -1;
555 				if(devid < 0)devid = i;					/* Remember first free one */
562 		if(devid < 0) {									/* Do we have free slots? */
567 		if(devid >= 16) {								/* Giving us something bogus? */
568 			panic("mdevadd: attempt to explicitly add a bogus memory device: %08X\n", devid);
570 		if(mdev[devid].mdFlags & mdInited) {			/* Already there? */
571 			panic("mdevadd: attempt to explicitly add a previously defined memory device: %08X\n", devid);
591 	mdev[devid].mdBDev = makedev(mdevBMajor, devid);	/* Get the device number */
592 	mdev[devid].mdbdevb = devfs_make_node(mdev[devid].mdBDev, DEVFS_BLOCK,	/* Make the node */
594 						  0600, "md%d", devid);
595 	if (mdev[devid].mdbdevb == NULL) {					/* Did we make one? */
600 	mdev[devid].mdCDev = makedev(mdevCMajor, devid);	/* Get the device number */
601 	mdev[devid].mdcdevb = devfs_make_node(mdev[devid].mdCDev, DEVFS_CHAR,		/* Make the node */
603 						  0600, "rmd%d", devid);
604 	if (mdev[devid].mdcdevb == NULL) {					/* Did we make one? */
609 	mdev[devid].mdBase = base;							/* Set the base address of ram disk */
610 	mdev[devid].mdSize = size;							/* Set the length of the ram disk */
611 	mdev[devid].mdSecsize = DEV_BSIZE;					/* Set starting block size */
612 	if(phys) mdev[devid].mdFlags |= mdPhys;				/* Show that we are in physical memory */
613 	mdev[devid].mdFlags |= mdInited;					/* Show we are all set up */
615 		   devid, devid, mdev[devid].mdBDev, mdev[devid].mdCDev, base << 12, (uint64_t)size << 12);
616 	return mdev[devid].mdBDev;
620 dev_t mdevlookup(int devid) {
622 	if((devid < 0) || (devid > 15)) return -1;			/* Filter any bogus requests */
623 	if(!(mdev[devid].mdFlags & mdInited)) return -1;	/* This one hasn't been defined */
624 	return mdev[devid].mdBDev;							/* Return the device number */