| isa_dma.c (204309) | isa_dma.c (233675) |
|---|---|
| 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/x86/isa/isa_dma.c 204309 2010-02-25 14:13:39Z attilio $"); | 36__FBSDID("$FreeBSD: head/sys/x86/isa/isa_dma.c 233675 2012-03-29 18:58:02Z jhb $"); |
| 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 --- 187 unchanged lines hidden (view full) --- 232void 233isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 234{ 235 vm_paddr_t phys; 236 int waport; 237 caddr_t newaddr; 238 int dma_range_checked; 239 | 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 --- 187 unchanged lines hidden (view full) --- 232void 233isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 234{ 235 vm_paddr_t phys; 236 int waport; 237 caddr_t newaddr; 238 int dma_range_checked; 239 |
| 240 /* translate to physical */ 241 phys = pmap_extract(kernel_pmap, (vm_offset_t)addr); | |
| 242 dma_range_checked = isa_dmarangecheck(addr, nbytes, chan); 243 244#ifdef DIAGNOSTIC 245 if (chan & ~VALID_DMA_MASK) 246 panic("isa_dmastart: channel out of range"); 247 248 if ((chan < 4 && nbytes > (1<<16)) 249 || (chan >= 4 && (nbytes > (1<<17) || (uintptr_t)addr & 1))) --- 26 unchanged lines hidden (view full) --- 276 newaddr = dma_bouncebuf[chan]; 277 278 /* copy bounce buffer on write */ 279 if (!(flags & ISADMA_READ)) 280 bcopy(addr, newaddr, nbytes); 281 addr = newaddr; 282 } 283 | 240 dma_range_checked = isa_dmarangecheck(addr, nbytes, chan); 241 242#ifdef DIAGNOSTIC 243 if (chan & ~VALID_DMA_MASK) 244 panic("isa_dmastart: channel out of range"); 245 246 if ((chan < 4 && nbytes > (1<<16)) 247 || (chan >= 4 && (nbytes > (1<<17) || (uintptr_t)addr & 1))) --- 26 unchanged lines hidden (view full) --- 274 newaddr = dma_bouncebuf[chan]; 275 276 /* copy bounce buffer on write */ 277 if (!(flags & ISADMA_READ)) 278 bcopy(addr, newaddr, nbytes); 279 addr = newaddr; 280 } 281 |
| 282 /* translate to physical */ 283 phys = pmap_extract(kernel_pmap, (vm_offset_t)addr); 284 |
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| 284 if (flags & ISADMA_RAW) { 285 dma_auto_mode |= (1 << chan); 286 } else { 287 dma_auto_mode &= ~(1 << chan); 288 } 289 290 if ((chan & 4) == 0) { 291 /* --- 320 unchanged lines hidden --- | 285 if (flags & ISADMA_RAW) { 286 dma_auto_mode |= (1 << chan); 287 } else { 288 dma_auto_mode &= ~(1 << chan); 289 } 290 291 if ((chan & 4) == 0) { 292 /* --- 320 unchanged lines hidden --- |