| isa_dma.c (79008) | isa_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/i386/isa/isa_dma.c 79008 2001-06-30 05:29:11Z imp $ | 37 * $FreeBSD: head/sys/i386/isa/isa_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 46 * mode DMA count compution and reorganized DMA setup code in 47 * isa_dmastart() 48 */ 49 50#include <sys/param.h> 51#include <sys/systm.h> 52#include <sys/bus.h> 53#include <sys/kernel.h> 54#include <sys/malloc.h> 55#include <sys/lock.h> | 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 46 * mode DMA count compution and reorganized DMA setup code in 47 * isa_dmastart() 48 */ 49 50#include <sys/param.h> 51#include <sys/systm.h> 52#include <sys/bus.h> 53#include <sys/kernel.h> 54#include <sys/malloc.h> 55#include <sys/lock.h> |
| 56#include <sys/proc.h> |
|
| 56#include <sys/mutex.h> 57#include <sys/module.h> 58#include <vm/vm.h> 59#include <vm/vm_param.h> 60#include <vm/pmap.h> 61#include <i386/isa/isa.h> 62#include <dev/ic/i8237.h> 63#include <isa/isavar.h> --- 147 unchanged lines hidden (view full) --- 211 */ 212void 213isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 214{ 215 vm_offset_t phys; 216 int waport; 217 caddr_t newaddr; 218 | 57#include <sys/mutex.h> 58#include <sys/module.h> 59#include <vm/vm.h> 60#include <vm/vm_param.h> 61#include <vm/pmap.h> 62#include <i386/isa/isa.h> 63#include <dev/ic/i8237.h> 64#include <isa/isavar.h> --- 147 unchanged lines hidden (view full) --- 212 */ 213void 214isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 215{ 216 vm_offset_t phys; 217 int waport; 218 caddr_t newaddr; 219 |
| 220 GIANT_REQUIRED; 221 |
|
| 219#ifdef DIAGNOSTIC 220 if (chan & ~VALID_DMA_MASK) 221 panic("isa_dmastart: channel out of range"); 222 223 if ((chan < 4 && nbytes > (1<<16)) 224 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 225 panic("isa_dmastart: impossible request"); 226 --- 22 unchanged lines hidden (view full) --- 249 250 /* copy bounce buffer on write */ 251 if (!(flags & ISADMA_READ)) 252 bcopy(addr, newaddr, nbytes); 253 addr = newaddr; 254 } 255 256 /* translate to physical */ | 222#ifdef DIAGNOSTIC 223 if (chan & ~VALID_DMA_MASK) 224 panic("isa_dmastart: channel out of range"); 225 226 if ((chan < 4 && nbytes > (1<<16)) 227 || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 228 panic("isa_dmastart: impossible request"); 229 --- 22 unchanged lines hidden (view full) --- 252 253 /* copy bounce buffer on write */ 254 if (!(flags & ISADMA_READ)) 255 bcopy(addr, newaddr, nbytes); 256 addr = newaddr; 257 } 258 259 /* translate to physical */ |
| 257 mtx_lock(&vm_mtx); /* 258 * XXX: need to hold for longer period to 259 * ensure that mappings don't change 260 */ | |
| 261 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); | 260 phys = pmap_extract(pmap_kernel(), (vm_offset_t)addr); |
| 262 mtx_unlock(&vm_mtx); | |
| 263 264 if (flags & ISADMA_RAW) { 265 dma_auto_mode |= (1 << chan); 266 } else { 267 dma_auto_mode &= ~(1 << chan); 268 } 269 270 if ((chan & 4) == 0) { --- 102 unchanged lines hidden (view full) --- 373 */ 374 375static int 376isa_dmarangecheck(caddr_t va, u_int length, int chan) 377{ 378 vm_offset_t phys, priorpage = 0, endva; 379 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 380 | 261 262 if (flags & ISADMA_RAW) { 263 dma_auto_mode |= (1 << chan); 264 } else { 265 dma_auto_mode &= ~(1 << chan); 266 } 267 268 if ((chan & 4) == 0) { --- 102 unchanged lines hidden (view full) --- 371 */ 372 373static int 374isa_dmarangecheck(caddr_t va, u_int length, int chan) 375{ 376 vm_offset_t phys, priorpage = 0, endva; 377 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 378 |
| 379 GIANT_REQUIRED; 380 |
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| 381 endva = (vm_offset_t)round_page((vm_offset_t)va + length); 382 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { | 381 endva = (vm_offset_t)round_page((vm_offset_t)va + length); 382 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { |
| 383 mtx_lock(&vm_mtx); | |
| 384 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); | 383 phys = trunc_page(pmap_extract(pmap_kernel(), (vm_offset_t)va)); |
| 385 mtx_unlock(&vm_mtx); | |
| 386#define ISARAM_END RAM_END 387 if (phys == 0) 388 panic("isa_dmacheck: no physical page present"); 389 if (phys >= ISARAM_END) 390 return (1); 391 if (priorpage) { 392 if (priorpage + PAGE_SIZE != phys) 393 return (1); --- 160 unchanged lines hidden --- | 384#define ISARAM_END RAM_END 385 if (phys == 0) 386 panic("isa_dmacheck: no physical page present"); 387 if (phys >= ISARAM_END) 388 return (1); 389 if (priorpage) { 390 if (priorpage + PAGE_SIZE != phys) 391 return (1); --- 160 unchanged lines hidden --- |