143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/* $NetBSD: bt_subr.c,v 1.9 1999/08/26 22:53:41 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Lawrence Berkeley Laboratory.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)bt_subr.c 8.2 (Berkeley) 1/21/94
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/errno.h>
|
|
|
|
#include <vm/vm.h>
|
|
|
|
#include <uvm/uvm_extern.h>
|
|
|
|
#include <machine/fbio.h>
|
|
|
|
#include <sparc/dev/btreg.h>
|
|
#include <sparc/dev/btvar.h>
|
|
|
|
/*
|
|
* Common code for dealing with Brooktree video DACs.
|
|
* (Contains some software-only code as well, since the colormap
|
|
* ioctls are shared between the cgthree and cgsix drivers.)
|
|
*/
|
|
|
|
/*
|
|
* Implement an FBIOGETCMAP-like ioctl.
|
|
*/
|
|
int
|
|
bt_getcmap(p, cm, cmsize)
|
|
register struct fbcmap *p;
|
|
union bt_cmap *cm;
|
|
int cmsize;
|
|
{
|
|
register u_int i, start, count;
|
|
register u_char *cp;
|
|
|
|
start = p->index;
|
|
count = p->count;
|
|
if (start >= cmsize || start + count > cmsize)
|
|
return (EINVAL);
|
|
if (!uvm_useracc(p->red, count, B_WRITE) ||
|
|
!uvm_useracc(p->green, count, B_WRITE) ||
|
|
!uvm_useracc(p->blue, count, B_WRITE))
|
|
return (EFAULT);
|
|
for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
|
|
p->red[i] = cp[0];
|
|
p->green[i] = cp[1];
|
|
p->blue[i] = cp[2];
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Implement the software portion of an FBIOPUTCMAP-like ioctl.
|
|
*/
|
|
int
|
|
bt_putcmap(p, cm, cmsize)
|
|
register struct fbcmap *p;
|
|
union bt_cmap *cm;
|
|
int cmsize;
|
|
{
|
|
register u_int i, start, count;
|
|
register u_char *cp;
|
|
|
|
start = p->index;
|
|
count = p->count;
|
|
if (start >= cmsize || start + count > cmsize)
|
|
return (EINVAL);
|
|
if (!uvm_useracc(p->red, count, B_READ) ||
|
|
!uvm_useracc(p->green, count, B_READ) ||
|
|
!uvm_useracc(p->blue, count, B_READ))
|
|
return (EFAULT);
|
|
for (cp = &cm->cm_map[start][0], i = 0; i < count; cp += 3, i++) {
|
|
cp[0] = p->red[i];
|
|
cp[1] = p->green[i];
|
|
cp[2] = p->blue[i];
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Initialize the color map to the default state:
|
|
*
|
|
* - 0 is black
|
|
* - all other entries are full white
|
|
*/
|
|
void
|
|
bt_initcmap(cm, cmsize)
|
|
union bt_cmap *cm;
|
|
int cmsize;
|
|
{
|
|
int i;
|
|
u_char *cp;
|
|
|
|
cp = &cm->cm_map[0][0];
|
|
cp[0] = cp[1] = cp[2] = 0;
|
|
|
|
for (i = 1, cp = &cm->cm_map[i][0]; i < cmsize; cp += 3, i++)
|
|
cp[0] = cp[1] = cp[2] = 0xff;
|
|
}
|