| cbus_dma.c (79008) | cbus_dma.c (79224) |
|---|---|
| 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 * $FreeBSD: head/sys/pc98/cbus/cbus_dma.c 79008 2001-06-30 05:29:11Z imp $ | 37 * $FreeBSD: head/sys/pc98/cbus/cbus_dma.c 79224 2001-07-04 16:20:28Z dillon $ |
| 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 --- 198 unchanged lines hidden (view full) --- 244 */ 245void 246isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 247{ 248 vm_offset_t phys; 249 int waport; 250 caddr_t newaddr; 251 | 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 --- 198 unchanged lines hidden (view full) --- 244 */ 245void 246isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 247{ 248 vm_offset_t phys; 249 int waport; 250 caddr_t newaddr; 251 |
| 252 GIANT_REQUIRED; 253 |
|
| 252#ifdef DIAGNOSTIC 253 if (chan & ~VALID_DMA_MASK) 254 panic("isa_dmastart: channel out of range"); 255 256 if ((chan < 4 && nbytes > (1<<16)) 257 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 258 panic("isa_dmastart: impossible request"); 259 --- 22 unchanged lines hidden (view full) --- 282 283 /* copy bounce buffer on write */ 284 if (!(flags & ISADMA_READ)) 285 bcopy(addr, newaddr, nbytes); 286 addr = newaddr; 287 } 288 289 /* translate to physical */ | 254#ifdef DIAGNOSTIC 255 if (chan & ~VALID_DMA_MASK) 256 panic("isa_dmastart: channel out of range"); 257 258 if ((chan < 4 && nbytes > (1<<16)) 259 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 260 panic("isa_dmastart: impossible request"); 261 --- 22 unchanged lines hidden (view full) --- 284 285 /* copy bounce buffer on write */ 286 if (!(flags & ISADMA_READ)) 287 bcopy(addr, newaddr, nbytes); 288 addr = newaddr; 289 } 290 291 /* translate to physical */ |
| 290 mtx_lock(&vm_mtx); /* 291 * XXX: need to hold for longer period to 292 * ensure that mappings don't change 293 */ | |
| 294 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); | 292 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); |
| 295 mtx_unlock(&vm_mtx); | |
| 296 297 if (flags & ISADMA_RAW) { 298 dma_auto_mode |= (1 << chan); 299 } else { 300 dma_auto_mode &= ~(1 << chan); 301 } 302 303#ifdef PC98 --- 129 unchanged lines hidden (view full) --- 433 */ 434 435static int 436isa_dmarangecheck(caddr_t va, u_int length, int chan) 437{ 438 vm_offset_t phys, priorpage = 0, endva; 439 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 440 | 293 294 if (flags & ISADMA_RAW) { 295 dma_auto_mode |= (1 << chan); 296 } else { 297 dma_auto_mode &= ~(1 << chan); 298 } 299 300#ifdef PC98 --- 129 unchanged lines hidden (view full) --- 430 */ 431 432static int 433isa_dmarangecheck(caddr_t va, u_int length, int chan) 434{ 435 vm_offset_t phys, priorpage = 0, endva; 436 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 437 |
| 438 GIANT_REQUIRED; 439 |
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| 441 endva = (vm_offset_t)round_page((vm_offset_t)va + length); 442 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { | 440 endva = (vm_offset_t)round_page((vm_offset_t)va + length); 441 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { |
| 443 mtx_lock(&vm_mtx); | |
| 444 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); | 442 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); |
| 445 mtx_unlock(&vm_mtx); | |
| 446#ifdef EPSON_BOUNCEDMA 447#define ISARAM_END 0xf00000 448#else 449#define ISARAM_END RAM_END 450#endif 451 if (phys == 0) 452 panic("isa_dmacheck: no physical page present"); 453 if (phys >= ISARAM_END) --- 171 unchanged lines hidden --- | 443#ifdef EPSON_BOUNCEDMA 444#define ISARAM_END 0xf00000 445#else 446#define ISARAM_END RAM_END 447#endif 448 if (phys == 0) 449 panic("isa_dmacheck: no physical page present"); 450 if (phys >= ISARAM_END) --- 171 unchanged lines hidden --- |