Index: trunk/minix/drivers/bios_wini/.depend =================================================================== --- trunk/minix/drivers/bios_wini/.depend (revision 9) +++ (revision ) @@ -1,96 +1,0 @@ - -bios_wini.o: ../drivers.h -bios_wini.o: ../libdriver/driver.h -bios_wini.o: ../libdriver/drvlib.h -bios_wini.o: /usr/include/ansi.h -bios_wini.o: /usr/include/assert.h -bios_wini.o: /usr/include/errno.h -bios_wini.o: /usr/include/ibm/bios.h -bios_wini.o: /usr/include/ibm/int86.h -bios_wini.o: /usr/include/ibm/interrupt.h -bios_wini.o: /usr/include/ibm/partition.h -bios_wini.o: /usr/include/ibm/ports.h -bios_wini.o: /usr/include/limits.h -bios_wini.o: /usr/include/minix/bitmap.h -bios_wini.o: /usr/include/minix/callnr.h -bios_wini.o: /usr/include/minix/com.h -bios_wini.o: /usr/include/minix/config.h -bios_wini.o: /usr/include/minix/const.h -bios_wini.o: /usr/include/minix/devio.h -bios_wini.o: /usr/include/minix/dmap.h -bios_wini.o: /usr/include/minix/ioctl.h -bios_wini.o: /usr/include/minix/ipc.h -bios_wini.o: /usr/include/minix/keymap.h -bios_wini.o: /usr/include/minix/partition.h -bios_wini.o: /usr/include/minix/sys_config.h -bios_wini.o: /usr/include/minix/syslib.h -bios_wini.o: /usr/include/minix/sysutil.h -bios_wini.o: /usr/include/minix/type.h -bios_wini.o: /usr/include/minix/u64.h -bios_wini.o: /usr/include/signal.h -bios_wini.o: /usr/include/stddef.h -bios_wini.o: /usr/include/stdlib.h -bios_wini.o: /usr/include/string.h -bios_wini.o: /usr/include/sys/dir.h -bios_wini.o: /usr/include/sys/ioc_disk.h -bios_wini.o: /usr/include/sys/types.h -bios_wini.o: /usr/include/unistd.h -bios_wini.o: bios_wini.c - -../libdriver/driver.o: ../libdriver/../drivers.h -../libdriver/driver.o: ../libdriver/driver.c -../libdriver/driver.o: ../libdriver/driver.h -../libdriver/driver.o: /usr/include/ansi.h -../libdriver/driver.o: /usr/include/errno.h -../libdriver/driver.o: /usr/include/ibm/bios.h -../libdriver/driver.o: /usr/include/ibm/interrupt.h -../libdriver/driver.o: /usr/include/ibm/ports.h -../libdriver/driver.o: /usr/include/limits.h -../libdriver/driver.o: /usr/include/minix/bitmap.h -../libdriver/driver.o: /usr/include/minix/callnr.h -../libdriver/driver.o: /usr/include/minix/com.h -../libdriver/driver.o: /usr/include/minix/config.h -../libdriver/driver.o: /usr/include/minix/const.h -../libdriver/driver.o: /usr/include/minix/devio.h -../libdriver/driver.o: /usr/include/minix/dmap.h -../libdriver/driver.o: /usr/include/minix/ioctl.h -../libdriver/driver.o: /usr/include/minix/ipc.h -../libdriver/driver.o: /usr/include/minix/partition.h -../libdriver/driver.o: /usr/include/minix/sys_config.h -../libdriver/driver.o: /usr/include/minix/syslib.h -../libdriver/driver.o: /usr/include/minix/sysutil.h -../libdriver/driver.o: /usr/include/minix/type.h -../libdriver/driver.o: /usr/include/minix/u64.h -../libdriver/driver.o: /usr/include/signal.h -../libdriver/driver.o: /usr/include/stddef.h -../libdriver/driver.o: /usr/include/stdlib.h -../libdriver/driver.o: /usr/include/string.h -../libdriver/driver.o: /usr/include/sys/dir.h -../libdriver/driver.o: /usr/include/sys/ioc_disk.h -../libdriver/driver.o: /usr/include/sys/types.h -../libdriver/driver.o: /usr/include/unistd.h - -../libdriver/drvlib.o: ../libdriver/driver.h -../libdriver/drvlib.o: ../libdriver/drvlib.c -../libdriver/drvlib.o: ../libdriver/drvlib.h -../libdriver/drvlib.o: /usr/include/ansi.h -../libdriver/drvlib.o: /usr/include/errno.h -../libdriver/drvlib.o: /usr/include/ibm/partition.h -../libdriver/drvlib.o: /usr/include/limits.h -../libdriver/drvlib.o: /usr/include/minix/callnr.h -../libdriver/drvlib.o: /usr/include/minix/com.h -../libdriver/drvlib.o: /usr/include/minix/config.h -../libdriver/drvlib.o: /usr/include/minix/const.h -../libdriver/drvlib.o: /usr/include/minix/devio.h -../libdriver/drvlib.o: /usr/include/minix/ipc.h -../libdriver/drvlib.o: /usr/include/minix/partition.h -../libdriver/drvlib.o: /usr/include/minix/sys_config.h -../libdriver/drvlib.o: /usr/include/minix/syslib.h -../libdriver/drvlib.o: /usr/include/minix/sysutil.h -../libdriver/drvlib.o: /usr/include/minix/type.h -../libdriver/drvlib.o: /usr/include/minix/u64.h -../libdriver/drvlib.o: /usr/include/stddef.h -../libdriver/drvlib.o: /usr/include/string.h -../libdriver/drvlib.o: /usr/include/sys/dir.h -../libdriver/drvlib.o: /usr/include/sys/types.h -../libdriver/drvlib.o: /usr/include/unistd.h Index: trunk/minix/drivers/bios_wini/Makefile =================================================================== --- trunk/minix/drivers/bios_wini/Makefile (revision 9) +++ (revision ) @@ -1,46 +1,0 @@ -# Makefile for the BIOS disk driver (BIOS_WINI) -DRIVER = bios_wini - -# directories -u = /usr -i = $u/include -s = $i/sys -m = $i/minix -b = $i/ibm -d = .. - -# programs, flags, etc. -MAKE = exec make -CC = exec cc -CFLAGS = -I$i -LDFLAGS = -i -LIBS = -lsysutil -lsys -ltimers - -OBJ = bios_wini.o -LIBDRIVER = $d/libdriver/driver.o $d/libdriver/drvlib.o - - -# build local binary -all build: $(DRIVER) -$(DRIVER): $(OBJ) $(LIBDRIVER) - $(CC) -o $@ $(LDFLAGS) $(OBJ) $(LIBDRIVER) $(LIBS) - install -S 4k $(DRIVER) - -$(LIBDRIVER): - cd $d/libdriver && $(MAKE) - -# install with other drivers -install: /sbin/$(DRIVER) -/sbin/$(DRIVER): $(DRIVER) - install -o root -cs $? $@ - -# clean up local files -clean: - rm -f $(DRIVER) *.o *.bak - -depend: - /usr/bin/mkdep "$(CC) -E $(CPPFLAGS)" *.c ../libdriver/*.c > .depend - -# Include generated dependencies. -include .depend - Index: trunk/minix/drivers/bios_wini/bios_wini.c =================================================================== --- trunk/minix/drivers/bios_wini/bios_wini.c (revision 9) +++ (revision ) @@ -1,510 +1,0 @@ -/* This file contains the "device dependent" part of a hard disk driver that - * uses the ROM BIOS. It makes a call and just waits for the transfer to - * happen. It is not interrupt driven and thus will (*) have poor performance. - * The advantage is that it should work on virtually any PC, XT, 386, PS/2 - * or clone. The demo disk uses this driver. It is suggested that all - * MINIX users try the other drivers, and use this one only as a last resort, - * if all else fails. - * - * (*) The performance is within 10% of the AT driver for reads on any disk - * and writes on a 2:1 interleaved disk, it will be DMA_BUF_SIZE bytes - * per revolution for a minimum of 60 kb/s for writes to 1:1 disks. - * - * The file contains one entry point: - * - * bios_winchester_task: main entry when system is brought up - * - * - * Changes: - * 30 Apr 1992 by Kees J. Bot: device dependent/independent split. - * 14 May 2000 by Kees J. Bot: d-d/i rewrite. - */ - -#include "../drivers.h" -#include "../libdriver/driver.h" -#include "../libdriver/drvlib.h" -#include -#include -#include -#include -#include - -#define ME "BIOS_WINI" - -/* Error codes */ -#define ERR (-1) /* general error */ - -/* Parameters for the disk drive. */ -#define MAX_DRIVES 8 /* this driver supports 8 drives (d0 - d7)*/ -#define MAX_SECS 255 /* bios can transfer this many sectors */ -#define NR_MINORS (MAX_DRIVES * DEV_PER_DRIVE) -#define SUB_PER_DRIVE (NR_PARTITIONS * NR_PARTITIONS) -#define NR_SUBDEVS (MAX_DRIVES * SUB_PER_DRIVE) - -PRIVATE int pc_at = 1; /* What about PC XTs? */ - -/* Variables. */ -PRIVATE struct wini { /* main drive struct, one entry per drive */ - unsigned cylinders; /* number of cylinders */ - unsigned heads; /* number of heads */ - unsigned sectors; /* number of sectors per track */ - unsigned open_ct; /* in-use count */ - int drive_id; /* Drive ID at BIOS level */ - int present; /* Valid drive */ - int int13ext; /* IBM/MS INT 13 extensions supported? */ - struct device part[DEV_PER_DRIVE]; /* disks and partitions */ - struct device subpart[SUB_PER_DRIVE]; /* subpartitions */ -} wini[MAX_DRIVES], *w_wn; - -PRIVATE int w_drive; /* selected drive */ -PRIVATE struct device *w_dv; /* device's base and size */ -PRIVATE vir_bytes bios_buf_vir, bios_buf_size; -PRIVATE phys_bytes bios_buf_phys; -PRIVATE int remap_first = 0; /* Remap drives for CD HD emulation */ - -_PROTOTYPE(int main, (void) ); -FORWARD _PROTOTYPE( struct device *w_prepare, (int device) ); -FORWARD _PROTOTYPE( char *w_name, (void) ); -FORWARD _PROTOTYPE( int w_transfer, (int proc_nr, int opcode, off_t position, - iovec_t *iov, unsigned nr_req) ); -FORWARD _PROTOTYPE( int w_do_open, (struct driver *dp, message *m_ptr) ); -FORWARD _PROTOTYPE( int w_do_close, (struct driver *dp, message *m_ptr) ); -FORWARD _PROTOTYPE( void w_init, (void) ); -FORWARD _PROTOTYPE( void w_geometry, (struct partition *entry)); -FORWARD _PROTOTYPE( int w_other, (struct driver *dp, message *m_ptr) ); - -/* Entry points to this driver. */ -PRIVATE struct driver w_dtab = { - w_name, /* current device's name */ - w_do_open, /* open or mount request, initialize device */ - w_do_close, /* release device */ - do_diocntl, /* get or set a partition's geometry */ - w_prepare, /* prepare for I/O on a given minor device */ - w_transfer, /* do the I/O */ - nop_cleanup, /* no cleanup needed */ - w_geometry, /* tell the geometry of the disk */ - nop_signal, /* no cleanup needed on shutdown */ - nop_alarm, /* ignore leftover alarms */ - nop_cancel, /* ignore CANCELs */ - nop_select, /* ignore selects */ - w_other, /* catch-all for unrecognized commands and ioctls */ - NULL /* leftover hardware interrupts */ -}; - -/*===========================================================================* - * bios_winchester_task * - *===========================================================================*/ -PUBLIC int main() -{ - long v; - struct sigaction sa; - - sa.sa_handler = SIG_MESS; - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; - if (sigaction(SIGTERM,&sa,NULL)<0) panic("BIOS","sigaction failed", errno); - - v= 0; - env_parse("bios_remap_first", "d", 0, &v, 0, 1); - remap_first= v; - -/* Set special disk parameters then call the generic main loop. */ - driver_task(&w_dtab); - return(OK); -} - -/*===========================================================================* - * w_prepare * - *===========================================================================*/ -PRIVATE struct device *w_prepare(device) -int device; -{ -/* Prepare for I/O on a device. */ - - if (device < NR_MINORS) { /* d0, d0p[0-3], d1, ... */ - w_drive = device / DEV_PER_DRIVE; /* save drive number */ - w_wn = &wini[w_drive]; - w_dv = &w_wn->part[device % DEV_PER_DRIVE]; - } else - if ((unsigned) (device -= MINOR_d0p0s0) < NR_SUBDEVS) {/*d[0-7]p[0-3]s[0-3]*/ - w_drive = device / SUB_PER_DRIVE; - w_wn = &wini[w_drive]; - w_dv = &w_wn->subpart[device % SUB_PER_DRIVE]; - } else { - return(NIL_DEV); - } - if (w_drive >= MAX_DRIVES || !w_wn->present) - return NIL_DEV; - return(w_dv); -} - -/*===========================================================================* - * w_name * - *===========================================================================*/ -PRIVATE char *w_name() -{ -/* Return a name for the current device. */ - static char name[] = "bios-d0"; - - name[6] = '0' + w_drive; - return name; -} - -/*===========================================================================* - * w_transfer * - *===========================================================================*/ -PRIVATE int w_transfer(proc_nr, opcode, position, iov, nr_req) -int proc_nr; /* process doing the request */ -int opcode; /* DEV_GATHER or DEV_SCATTER */ -off_t position; /* offset on device to read or write */ -iovec_t *iov; /* pointer to read or write request vector */ -unsigned nr_req; /* length of request vector */ -{ - struct wini *wn = w_wn; - iovec_t *iop, *iov_end = iov + nr_req; - int r, errors; - unsigned nbytes, count, chunk; - unsigned long block; - vir_bytes i13e_rw_off, rem_buf_size; - unsigned long dv_size = cv64ul(w_dv->dv_size); - unsigned secspcyl = wn->heads * wn->sectors; - struct int13ext_rw { - u8_t len; - u8_t res1; - u16_t count; - u16_t addr[2]; - u32_t block[2]; - } i13e_rw; - struct reg86u reg86; - - /* Check disk address. */ - if ((position & SECTOR_MASK) != 0) return(EINVAL); - - errors = 0; - - i13e_rw_off= bios_buf_size-sizeof(i13e_rw); - rem_buf_size= (i13e_rw_off & ~SECTOR_MASK); - assert(rem_buf_size != 0); - - while (nr_req > 0) { - /* How many bytes to transfer? */ - nbytes = 0; - for (iop = iov; iop < iov_end; iop++) { - if (nbytes + iop->iov_size > rem_buf_size) { - /* Don't do half a segment if you can avoid it. */ - if (nbytes == 0) nbytes = rem_buf_size; - break; - } - nbytes += iop->iov_size; - } - if ((nbytes & SECTOR_MASK) != 0) return(EINVAL); - - /* Which block on disk and how close to EOF? */ - if (position >= dv_size) return(OK); /* At EOF */ - if (position + nbytes > dv_size) nbytes = dv_size - position; - block = div64u(add64ul(w_dv->dv_base, position), SECTOR_SIZE); - - /* Degrade to per-sector mode if there were errors. */ - if (errors > 0) nbytes = SECTOR_SIZE; - - if (opcode == DEV_SCATTER) { - /* Copy from user space to the DMA buffer. */ - count = 0; - for (iop = iov; count < nbytes; iop++) { - chunk = iov->iov_size; - if (count + chunk > nbytes) chunk = nbytes - count; - assert(chunk <= rem_buf_size); - r= sys_vircopy(proc_nr, D, iop->iov_addr, - SYSTEM, D, bios_buf_vir+count, - chunk); - if (r != OK) - panic(ME, "sys_vircopy failed", r); - count += chunk; - } - } - - /* Do the transfer */ - if (wn->int13ext) { - i13e_rw.len = 0x10; - i13e_rw.res1 = 0; - i13e_rw.count = nbytes >> SECTOR_SHIFT; - i13e_rw.addr[0] = bios_buf_phys % HCLICK_SIZE; - i13e_rw.addr[1] = bios_buf_phys / HCLICK_SIZE; - i13e_rw.block[0] = block; - i13e_rw.block[1] = 0; - r= sys_vircopy(SELF, D, (vir_bytes)&i13e_rw, - SYSTEM, D, (bios_buf_vir+i13e_rw_off), - sizeof(i13e_rw)); - if (r != OK) - panic(ME, "sys_vircopy failed", r); - - /* Set up an extended read or write BIOS call. */ - reg86.u.b.intno = 0x13; - reg86.u.w.ax = opcode == DEV_SCATTER ? 0x4300 : 0x4200; - reg86.u.b.dl = wn->drive_id; - reg86.u.w.si = (bios_buf_phys + i13e_rw_off) % HCLICK_SIZE; - reg86.u.w.ds = (bios_buf_phys + i13e_rw_off) / HCLICK_SIZE; - } else { - /* Set up an ordinary read or write BIOS call. */ - unsigned cylinder = block / secspcyl; - unsigned sector = (block % wn->sectors) + 1; - unsigned head = (block % secspcyl) / wn->sectors; - - reg86.u.b.intno = 0x13; - reg86.u.b.ah = opcode == DEV_SCATTER ? 0x03 : 0x02; - reg86.u.b.al = nbytes >> SECTOR_SHIFT; - reg86.u.w.bx = bios_buf_phys % HCLICK_SIZE; - reg86.u.w.es = bios_buf_phys / HCLICK_SIZE; - reg86.u.b.ch = cylinder & 0xFF; - reg86.u.b.cl = sector | ((cylinder & 0x300) >> 2); - reg86.u.b.dh = head; - reg86.u.b.dl = wn->drive_id; - } - - r= sys_int86(®86); - if (r != OK) - panic(ME, "BIOS call failed", r); - - if (reg86.u.w.f & 0x0001) { - /* An error occurred, try again sector by sector unless */ - if (++errors == 2) return(EIO); - continue; - } - - if (opcode == DEV_GATHER) { - /* Copy from the DMA buffer to user space. */ - count = 0; - for (iop = iov; count < nbytes; iop++) { - chunk = iov->iov_size; - if (count + chunk > nbytes) chunk = nbytes - count; - assert(chunk <= rem_buf_size); - r= sys_vircopy(SYSTEM, D, bios_buf_vir+count, - proc_nr, D, iop->iov_addr, - chunk); - if (r != OK) - panic(ME, "sys_vircopy failed", r); - count += chunk; - } - } - - /* Book the bytes successfully transferred. */ - position += nbytes; - for (;;) { - if (nbytes < iov->iov_size) { - /* Not done with this one yet. */ - iov->iov_addr += nbytes; - iov->iov_size -= nbytes; - break; - } - nbytes -= iov->iov_size; - iov->iov_addr += iov->iov_size; - iov->iov_size = 0; - if (nbytes == 0) { - /* The rest is optional, so we return to give FS a - * chance to think it over. - */ - return(OK); - } - iov++; - nr_req--; - } - } - return(OK); -} - -/*============================================================================* - * w_do_open * - *============================================================================*/ -PRIVATE int w_do_open(dp, m_ptr) -struct driver *dp; -message *m_ptr; -{ -/* Device open: Initialize the controller and read the partition table. */ - - static int init_done = FALSE; - - if (!init_done) { w_init(); init_done = TRUE; } - - if (w_prepare(m_ptr->DEVICE) == NIL_DEV) return(ENXIO); - - if (w_wn->open_ct++ == 0) { - /* Partition the disk. */ - partition(&w_dtab, w_drive * DEV_PER_DRIVE, P_PRIMARY, 0); - } - return(OK); -} - -/*============================================================================* - * w_do_close * - *============================================================================*/ -PRIVATE int w_do_close(dp, m_ptr) -struct driver *dp; -message *m_ptr; -{ -/* Device close: Release a device. */ - - if (w_prepare(m_ptr->DEVICE) == NIL_DEV) return(ENXIO); - w_wn->open_ct--; - return(OK); -} - -/*===========================================================================* - * w_init * - *===========================================================================*/ -PRIVATE void w_init() -{ -/* This routine is called at startup to initialize the drive parameters. */ - - int r, drive, drive_id, nr_drives; - struct wini *wn; - unsigned long capacity; - struct int13ext_params { - u16_t len; - u16_t flags; - u32_t cylinders; - u32_t heads; - u32_t sectors; - u32_t capacity[2]; - u16_t bts_per_sec; - u16_t config[2]; - } i13e_par; - struct reg86u reg86; - - /* Ask the system task for a suitable buffer */ - r= sys_getbiosbuffer(&bios_buf_vir, &bios_buf_size); - if (r != OK) - panic(ME, "sys_getbiosbuffer failed", r); - r= sys_umap(SYSTEM, D, (vir_bytes)bios_buf_vir, (phys_bytes)bios_buf_size, - &bios_buf_phys); - if (r != OK) - panic(ME, "sys_umap failed", r); - if (bios_buf_phys+bios_buf_size > 0x100000) - panic(ME, "bad BIOS buffer, phys", bios_buf_phys); -#if 0 - printf("bios_wini: got buffer size %d, virtual 0x%x, phys 0x%x\n", - bios_buf_size, bios_buf_vir, bios_buf_phys); -#endif - - /* Get the geometry of the drives */ - for (drive = 0; drive < MAX_DRIVES; drive++) { - if (remap_first) - { - if (drive == 7) - drive_id= 0x80; - else - drive_id= 0x80 + drive + 1; - } - else - drive_id= 0x80 + drive; - - (void) w_prepare(drive * DEV_PER_DRIVE); - wn = w_wn; - wn->drive_id= drive_id; - - reg86.u.b.intno = 0x13; - reg86.u.b.ah = 0x08; /* Get drive parameters. */ - reg86.u.b.dl = drive_id; - r= sys_int86(®86); - if (r != OK) - panic(ME, "BIOS call failed", r); - - nr_drives = !(reg86.u.w.f & 0x0001) ? reg86.u.b.dl : drive; - if (drive_id >= 0x80 + nr_drives) continue; - wn->present= 1; - - wn->heads = reg86.u.b.dh + 1; - wn->sectors = reg86.u.b.cl & 0x3F; - wn->cylinders = (reg86.u.b.ch | ((reg86.u.b.cl & 0xC0) << 2)) + 1; - - capacity = (unsigned long) wn->cylinders * wn->heads * wn->sectors; - - reg86.u.b.intno = 0x13; - reg86.u.b.ah = 0x41; /* INT 13 Extensions - Installation check */ - reg86.u.w.bx = 0x55AA; - reg86.u.b.dl = drive_id; - - if (pc_at) { - r= sys_int86(®86); - if (r != OK) - panic(ME, "BIOS call failed", r); - } - - if (!(reg86.u.w.f & 0x0001) && reg86.u.w.bx == 0xAA55 - && (reg86.u.w.cx & 0x0001)) { - /* INT 13 Extensions available. */ - i13e_par.len = 0x001E; /* Input size of parameter packet */ - r= sys_vircopy(SELF, D, (vir_bytes)&i13e_par, - SYSTEM, D, bios_buf_vir, - sizeof(i13e_par)); - if (r != OK) - panic(ME, "sys_vircopy failed\n", r); - reg86.u.b.intno = 0x13; - reg86.u.b.ah = 0x48; /* Ext. Get drive parameters. */ - reg86.u.b.dl = drive_id; - reg86.u.w.si = bios_buf_phys % HCLICK_SIZE; - reg86.u.w.ds = bios_buf_phys / HCLICK_SIZE; - - r= sys_int86(®86); - if (r != OK) - panic(ME, "BIOS call failed", r); - - r= sys_vircopy(SYSTEM, D, bios_buf_vir, - SELF, D, (vir_bytes)&i13e_par, - sizeof(i13e_par)); - if (r != OK) - panic(ME, "sys_vircopy failed\n", r); - - if (!(reg86.u.w.f & 0x0001)) { - wn->int13ext = 1; /* Extensions can be used. */ - capacity = i13e_par.capacity[0]; - if (i13e_par.capacity[1] != 0) capacity = 0xFFFFFFFF; - } - } - - if (wn->int13ext) { - printf("%s: %lu sectors\n", w_name(), capacity); - } else { - printf("%s: %d cylinders, %d heads, %d sectors per track\n", - w_name(), wn->cylinders, wn->heads, wn->sectors); - } - wn->part[0].dv_size = mul64u(capacity, SECTOR_SIZE); - } -} - -/*============================================================================* - * w_geometry * - *============================================================================*/ -PRIVATE void w_geometry(entry) -struct partition *entry; -{ - entry->cylinders = w_wn->cylinders; - entry->heads = w_wn->heads; - entry->sectors = w_wn->sectors; -} - -/*============================================================================* - * w_other * - *============================================================================*/ -PRIVATE int w_other(dr, m) -struct driver *dr; -message *m; -{ - int r, timeout, prev; - - if (m->m_type != DEV_IOCTL ) { - return EINVAL; - } - - if (m->REQUEST == DIOCOPENCT) { - int count; - if (w_prepare(m->DEVICE) == NIL_DEV) return ENXIO; - count = w_wn->open_ct; - if ((r=sys_datacopy(SELF, (vir_bytes)&count, - m->IO_ENDPT, (vir_bytes)m->ADDRESS, sizeof(count))) != OK) - return r; - return OK; - } - - return EINVAL; -} -