| isa_dma.c (135262) | isa_dma.c (141391) |
|---|---|
| 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 --- 19 unchanged lines hidden (view full) --- 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 33 */ 34 35#include <sys/cdefs.h> | 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 --- 19 unchanged lines hidden (view full) --- 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 33 */ 34 35#include <sys/cdefs.h> |
| 36__FBSDID("$FreeBSD: head/sys/i386/isa/isa_dma.c 135262 2004-09-15 12:09:50Z phk $"); | 36__FBSDID("$FreeBSD: head/sys/i386/isa/isa_dma.c 141391 2005-02-06 13:46:39Z phk $"); |
| 37 38/* 39 * code to manage AT bus 40 * 41 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 42 * Fixed uninitialized variable problem and added code to deal 43 * with DMA page boundaries in isa_dmarangecheck(). Fixed word 44 * mode DMA count compution and reorganized DMA setup code in --- 11 unchanged lines hidden (view full) --- 56#include <sys/module.h> 57#include <vm/vm.h> 58#include <vm/vm_param.h> 59#include <vm/pmap.h> 60#include <i386/isa/isa.h> 61#include <dev/ic/i8237.h> 62#include <isa/isavar.h> 63 | 37 38/* 39 * code to manage AT bus 40 * 41 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 42 * Fixed uninitialized variable problem and added code to deal 43 * with DMA page boundaries in isa_dmarangecheck(). Fixed word 44 * mode DMA count compution and reorganized DMA setup code in --- 11 unchanged lines hidden (view full) --- 56#include <sys/module.h> 57#include <vm/vm.h> 58#include <vm/vm_param.h> 59#include <vm/pmap.h> 60#include <i386/isa/isa.h> 61#include <dev/ic/i8237.h> 62#include <isa/isavar.h> 63 |
| 64/* 65** Register definitions for DMA controller 1 (channels 0..3): 66*/ 67#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 68#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 69#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 70#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ 71 72/* 73** Register definitions for DMA controller 2 (channels 4..7): 74*/ 75#define DMA2_CHN(c) (IO_DMA2 + 2*(2*(c))) /* addr reg for channel c */ 76#define DMA2_SMSK (IO_DMA2 + 2*10) /* single mask register */ 77#define DMA2_MODE (IO_DMA2 + 2*11) /* mode register */ 78#define DMA2_FFC (IO_DMA2 + 2*12) /* clear first/last FF */ 79 | |
| 80static int isa_dmarangecheck(caddr_t va, u_int length, int chan); 81 82static caddr_t dma_bouncebuf[8]; 83static u_int dma_bouncebufsize[8]; 84static u_int8_t dma_bounced = 0; 85static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 86static u_int8_t dma_inuse = 0; /* User for acquire/release */ 87static u_int8_t dma_auto_mode = 0; --- 395 unchanged lines hidden (view full) --- 483 } 484 485 if (chan >= 4) /* high channels move words */ 486 cnt *= 2; 487 return(cnt); 488} 489 490/* | 64static int isa_dmarangecheck(caddr_t va, u_int length, int chan); 65 66static caddr_t dma_bouncebuf[8]; 67static u_int dma_bouncebufsize[8]; 68static u_int8_t dma_bounced = 0; 69static u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 70static u_int8_t dma_inuse = 0; /* User for acquire/release */ 71static u_int8_t dma_auto_mode = 0; --- 395 unchanged lines hidden (view full) --- 467 } 468 469 if (chan >= 4) /* high channels move words */ 470 cnt *= 2; 471 return(cnt); 472} 473 474/* |
| 475 * Reached terminal count yet ? 476 */ 477int 478isa_dmatc(int chan) 479{ 480 481 if (chan < 4) 482 return(inb(DMA1_STATUS) & (1 << chan)); 483 else 484 return(inb(DMA2_STATUS) & (1 << (chan & 3))); 485} 486 487/* |
|
| 491 * Stop a DMA transfer currently in progress. 492 */ 493int 494isa_dmastop(int chan) 495{ 496 if ((dma_inuse & (1 << chan)) == 0) 497 printf("isa_dmastop: channel %d not acquired\n", chan); 498 --- 59 unchanged lines hidden --- | 488 * Stop a DMA transfer currently in progress. 489 */ 490int 491isa_dmastop(int chan) 492{ 493 if ((dma_inuse & (1 << chan)) == 0) 494 printf("isa_dmastop: channel %d not acquired\n", chan); 495 --- 59 unchanged lines hidden --- |