1 /* $NetBSD: bt_subr.c,v 1.4 2001/09/19 18:10:34 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)bt_subr.c 8.2 (Berkeley) 1/21/94 45 */ 46 47 #include <sys/param.h> 48 #include <sys/buf.h> 49 #include <sys/errno.h> 50 51 #include <dev/sun/fbio.h> 52 53 #include "btreg.h" 54 #include "btvar.h" 55 56 /* 57 * Common code for dealing with Brooktree video DACs. 58 * (Contains some software-only code as well, since the colormap 59 * ioctls are shared between the cgthree and cgsix drivers.) 60 */ 61 62 /* 63 * Implement an FBIOGETCMAP-like ioctl. 64 */ 65 int 66 bt_getcmap(p, cm, cmsize) 67 struct fbcmap *p; 68 union bt_cmap *cm; 69 int cmsize; 70 { 71 u_int i, start, count; 72 u_char *cp; 73 74 start = p->index; 75 count = p->count; 76 if (start >= cmsize || start + count > cmsize) 77 return (EINVAL); 78 if (!useracc(p->red, count, B_WRITE) || 79 !useracc(p->green, count, B_WRITE) || 80 !useracc(p->blue, count, B_WRITE)) 81 return (EFAULT); 82 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) { 83 p->red[i] = cp[0]; 84 p->green[i] = cp[1]; 85 p->blue[i] = cp[2]; 86 } 87 return (0); 88 } 89 90 /* 91 * Implement the software portion of an FBIOPUTCMAP-like ioctl. 92 */ 93 int 94 bt_putcmap(p, cm, cmsize) 95 struct fbcmap *p; 96 union bt_cmap *cm; 97 int cmsize; 98 { 99 u_int i, start, count; 100 u_char *cp; 101 102 start = p->index; 103 count = p->count; 104 if (start >= cmsize || start + count > cmsize) 105 return (EINVAL); 106 if (!useracc(p->red, count, B_READ) || 107 !useracc(p->green, count, B_READ) || 108 !useracc(p->blue, count, B_READ)) 109 return (EFAULT); 110 for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) { 111 cp[0] = p->red[i]; 112 cp[1] = p->green[i]; 113 cp[2] = p->blue[i]; 114 } 115 return (0); 116 } 117