| isa.c (33134) | isa.c (35256) |
|---|---|
| 1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 | 1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 |
| 37 * $Id: isa.c,v 1.110 1998/02/04 22:32:21 eivind Exp $ | 37 * $Id: isa.c,v 1.111 1998/02/06 12:13:17 eivind Exp $ |
| 38 */ 39 40/* 41 * code to manage AT bus 42 * 43 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44 * Fixed uninitialized variable problem and added code to deal 45 * with DMA page boundaries in isa_dmarangecheck(). Fixed word --- 601 unchanged lines hidden (view full) --- 647 if (buf == NULL) 648 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 649 else 650 dma_bouncebuf[chan] = buf; 651} 652 653/* 654 * Register a DMA channel's usage. Usually called from a device driver | 38 */ 39 40/* 41 * code to manage AT bus 42 * 43 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44 * Fixed uninitialized variable problem and added code to deal 45 * with DMA page boundaries in isa_dmarangecheck(). Fixed word --- 601 unchanged lines hidden (view full) --- 647 if (buf == NULL) 648 printf("isa_dmainit(%d, %d) failed\n", chan, bouncebufsize); 649 else 650 dma_bouncebuf[chan] = buf; 651} 652 653/* 654 * Register a DMA channel's usage. Usually called from a device driver |
| 655 * in open() or during it's initialization. | 655 * in open() or during its initialization. |
| 656 */ 657int 658isa_dma_acquire(chan) 659 int chan; 660{ 661#ifdef DIAGNOSTIC 662 if (chan & ~VALID_DMA_MASK) 663 panic("isa_dma_acquire: channel out of range"); --- 6 unchanged lines hidden (view full) --- 670 dma_inuse |= (1 << chan); 671 dma_auto_mode &= ~(1 << chan); 672 673 return (0); 674} 675 676/* 677 * Unregister a DMA channel's usage. Usually called from a device driver | 656 */ 657int 658isa_dma_acquire(chan) 659 int chan; 660{ 661#ifdef DIAGNOSTIC 662 if (chan & ~VALID_DMA_MASK) 663 panic("isa_dma_acquire: channel out of range"); --- 6 unchanged lines hidden (view full) --- 670 dma_inuse |= (1 << chan); 671 dma_auto_mode &= ~(1 << chan); 672 673 return (0); 674} 675 676/* 677 * Unregister a DMA channel's usage. Usually called from a device driver |
| 678 * during close() or during it's shutdown. | 678 * during close() or during its shutdown. |
| 679 */ 680void 681isa_dma_release(chan) 682 int chan; 683{ 684#ifdef DIAGNOSTIC 685 if (chan & ~VALID_DMA_MASK) 686 panic("isa_dma_release: channel out of range"); --- 382 unchanged lines hidden --- | 679 */ 680void 681isa_dma_release(chan) 682 int chan; 683{ 684#ifdef DIAGNOSTIC 685 if (chan & ~VALID_DMA_MASK) 686 panic("isa_dma_release: channel out of range"); --- 382 unchanged lines hidden --- |