| isa_dma.c (95710) | isa_dma.c (112569) |
|---|---|
| 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 95710 2002-04-29 07:43:16Z peter $ | 37 * $FreeBSD: head/sys/i386/isa/isa_dma.c 112569 2003-03-25 00:07:06Z jake $ |
| 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 --- 162 unchanged lines hidden (view full) --- 208 209/* 210 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 211 * problems by using a bounce buffer. 212 */ 213void 214isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 215{ | 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 --- 162 unchanged lines hidden (view full) --- 208 209/* 210 * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 211 * problems by using a bounce buffer. 212 */ 213void 214isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 215{ |
| 216 vm_offset_t phys; | 216 vm_paddr_t phys; |
| 217 int waport; 218 caddr_t newaddr; 219 220 GIANT_REQUIRED; 221 222#ifdef DIAGNOSTIC 223 if (chan & ~VALID_DMA_MASK) 224 panic("isa_dmastart: channel out of range"); --- 143 unchanged lines hidden (view full) --- 368 * (non-contiguous physical pages, outside of bus address space, 369 * crossing DMA page boundaries). 370 * Return true if special handling needed. 371 */ 372 373static int 374isa_dmarangecheck(caddr_t va, u_int length, int chan) 375{ | 217 int waport; 218 caddr_t newaddr; 219 220 GIANT_REQUIRED; 221 222#ifdef DIAGNOSTIC 223 if (chan & ~VALID_DMA_MASK) 224 panic("isa_dmastart: channel out of range"); --- 143 unchanged lines hidden (view full) --- 368 * (non-contiguous physical pages, outside of bus address space, 369 * crossing DMA page boundaries). 370 * Return true if special handling needed. 371 */ 372 373static int 374isa_dmarangecheck(caddr_t va, u_int length, int chan) 375{ |
| 376 vm_offset_t phys, priorpage = 0, endva; | 376 vm_paddr_t phys, priorpage = 0; 377 vm_offset_t endva; |
| 377 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 378 379 GIANT_REQUIRED; 380 381 endva = (vm_offset_t)round_page((vm_offset_t)va + length); 382 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 383 phys = trunc_page(pmap_extract(kernel_pmap, (vm_offset_t)va)); 384#define ISARAM_END RAM_END --- 168 unchanged lines hidden --- | 378 u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 379 380 GIANT_REQUIRED; 381 382 endva = (vm_offset_t)round_page((vm_offset_t)va + length); 383 for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 384 phys = trunc_page(pmap_extract(kernel_pmap, (vm_offset_t)va)); 385#define ISARAM_END RAM_END --- 168 unchanged lines hidden --- |