e07f0b9362
copyin() or copyout(). uvm_useracc() tells us whether the mapping permissions allow access to the desired part of an address space, and many callers assume that this is the same as knowing whether an attempt to access that part of the address space will succeed. however, access to user space can fail for reasons other than insufficient permission, most notably that paging in any non-resident data can fail due to i/o errors. most of the callers of uvm_useracc() make the above incorrect assumption. the rest are all misguided optimizations, which optimize for the case where an operation will fail. we'd rather optimize for operations succeeding, in which case we should just attempt the access and handle failures due to insufficient permissions the same way we handle i/o errors. since there appear to be no good uses of uvm_useracc(), we'll just remove it.
321 lines
7.8 KiB
C
321 lines
7.8 KiB
C
/* $NetBSD: video_subr.c,v 1.6 2003/11/13 03:09:29 chs Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by UCHIYAMA Yasushi.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: video_subr.c,v 1.6 2003/11/13 03:09:29 chs Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <machine/bootinfo.h>
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#include <dev/hpc/video_subr.h>
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#define BPP2 ({ \
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u_int8_t bitmap; \
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bitmap = *(volatile u_int8_t*)addr; \
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*(volatile u_int8_t*)addr = \
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(bitmap & ~(0x3 << ((3 - (x % 4)) * 2))); \
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})
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#define BPP4 ({ \
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u_int8_t bitmap; \
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bitmap = *(volatile u_int8_t*)addr; \
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*(volatile u_int8_t*)addr = \
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(bitmap & ~(0xf << ((1 - (x % 2)) * 4))); \
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})
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#define BPP8 ({ \
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*(volatile u_int8_t*)addr = 0xff; \
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})
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#define BRESENHAM(a, b, c, d, func) ({ \
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u_int32_t fbaddr = vc->vc_fbvaddr; \
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u_int32_t fbwidth = vc->vc_fbwidth; \
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u_int32_t fbdepth = vc->vc_fbdepth; \
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len = a, step = b -1; \
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if (step == 0) \
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return; \
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kstep = len == 0 ? 0 : 1; \
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for (i = k = 0, j = step / 2; i <= step; i++) { \
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x = xbase c; \
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y = ybase d; \
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addr = fbaddr + (((y * fbwidth + x) * fbdepth) >> 3); \
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func; \
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j -= len; \
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while (j < 0) { \
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j += step; \
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k += kstep; \
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} \
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} \
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})
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#define DRAWLINE(func) ({ \
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if (x < 0) { \
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if (y < 0) { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, -i, -k, func); \
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} else { \
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BRESENHAM(_x, _y, -k, -i, func); \
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} \
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} else { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, -i, +k, func); \
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} else { \
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BRESENHAM(_x, _y, -k, +i, func); \
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} \
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} \
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} else { \
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if (y < 0) { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, +i, -k, func); \
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} else { \
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BRESENHAM(_x, _y, +k, -i, func); \
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} \
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} else { \
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if (_y < _x) { \
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BRESENHAM(_y, _x, +i, +k, func); \
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} else { \
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BRESENHAM(_x, _y, +k, +i, func); \
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} \
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} \
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} \
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})
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#define LINEFUNC(b) \
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static void linebpp##b (struct video_chip *, int, int, int, int); \
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static void \
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linebpp##b(vc, x0, y0, x1, y1) \
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struct video_chip *vc; \
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int x0, y0, x1, y1; \
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{ \
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u_int32_t addr; \
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int i, j, k, len, step, kstep; \
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int x, _x, y, _y; \
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int xbase, ybase; \
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x = x1 - x0; \
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y = y1 - y0; \
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_x = abs(x); \
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_y = abs(y); \
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xbase = x0; \
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ybase = y0; \
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DRAWLINE(BPP##b); \
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}
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#define DOTFUNC(b) \
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static void dotbpp##b (struct video_chip *, int, int); \
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static void \
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dotbpp##b(vc, x, y) \
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struct video_chip *vc; \
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int x, y; \
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{ \
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u_int32_t addr; \
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addr = vc->vc_fbvaddr + (((y * vc->vc_fbwidth + x) * \
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vc->vc_fbdepth) >> 3); \
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BPP##b; \
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}
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LINEFUNC(2)
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LINEFUNC(4)
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LINEFUNC(8)
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DOTFUNC(2)
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DOTFUNC(4)
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DOTFUNC(8)
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static void linebpp_unimpl(struct video_chip *, int, int, int, int);
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static void dotbpp_unimpl(struct video_chip *, int, int);
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int
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cmap_work_alloc(u_int8_t **r, u_int8_t **g, u_int8_t **b, u_int32_t **rgb,
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int cnt)
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{
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KASSERT(LEGAL_CLUT_INDEX(cnt - 1));
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#define ALLOC_BUF(x, bit) \
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if (x) { \
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*x = malloc(cnt * sizeof(u_int ## bit ## _t), \
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M_DEVBUF, M_WAITOK); \
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if (*x == 0) \
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goto errout; \
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}
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ALLOC_BUF(r, 8);
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ALLOC_BUF(g, 8);
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ALLOC_BUF(b, 8);
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ALLOC_BUF(rgb, 32);
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#undef ALLOCBUF
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return (0);
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errout:
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cmap_work_free(*r, *g, *b, *rgb);
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return (ENOMEM);
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}
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void
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cmap_work_free(u_int8_t *r, u_int8_t *g, u_int8_t *b, u_int32_t *rgb)
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{
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if (r)
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free(r, M_DEVBUF);
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if (g)
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free(g, M_DEVBUF);
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if (b)
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free(b, M_DEVBUF);
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if (rgb)
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free(rgb, M_DEVBUF);
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}
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void
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rgb24_compose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b, int cnt)
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{
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int i;
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KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1));
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for (i = 0; i < cnt; i++) {
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*rgb24++ = RGB24(r[i], g[i], b[i]);
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}
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}
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void
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rgb24_decompose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b,
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int cnt)
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{
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int i;
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KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1));
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for (i = 0; i < cnt; i++) {
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u_int32_t rgb = *rgb24++;
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*r++ = (rgb >> 16) & 0xff;
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*g++ = (rgb >> 8) & 0xff;
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*b++ = rgb & 0xff;
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}
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}
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/*
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* Debug routines.
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*/
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void
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video_calibration_pattern(struct video_chip *vc)
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{
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int x, y;
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x = vc->vc_fbwidth - 40;
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y = vc->vc_fbheight - 40;
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video_line(vc, 40, 40, x , 40);
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video_line(vc, x , 40, x , y );
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video_line(vc, x , y , 40, y );
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video_line(vc, 40, y , 40, 40);
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video_line(vc, 40, 40, x , y );
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video_line(vc, x, 40, 40, y );
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}
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static void
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linebpp_unimpl(struct video_chip *vc, int x0, int y0, int x1, int y1)
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{
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return;
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}
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static void
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dotbpp_unimpl(struct video_chip *vc, int x, int y)
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{
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return;
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}
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void
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video_attach_drawfunc(struct video_chip *vc)
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{
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switch (vc->vc_fbdepth) {
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default:
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vc->vc_drawline = linebpp_unimpl;
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vc->vc_drawdot = dotbpp_unimpl;
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break;
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case 8:
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vc->vc_drawline = linebpp8;
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vc->vc_drawdot = dotbpp8;
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break;
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case 4:
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vc->vc_drawline = linebpp4;
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vc->vc_drawdot = dotbpp4;
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break;
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case 2:
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vc->vc_drawline = linebpp2;
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vc->vc_drawdot = dotbpp2;
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break;
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}
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}
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void
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video_line(struct video_chip *vc, int x0, int y0, int x1, int y1)
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{
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if (vc->vc_drawline)
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vc->vc_drawline(vc, x0, y0, x1, y1);
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}
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void
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video_dot(struct video_chip *vc, int x, int y)
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{
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if (vc->vc_drawdot)
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vc->vc_drawdot(vc, x, y);
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}
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int
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video_reverse_color()
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{
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struct {
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int reverse, normal;
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} ctype[] = {
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{ BIFB_D2_M2L_3, BIFB_D2_M2L_0 },
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{ BIFB_D2_M2L_3x2, BIFB_D2_M2L_0x2 },
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{ BIFB_D8_FF, BIFB_D8_00 },
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{ BIFB_D16_FFFF, BIFB_D16_0000, },
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{ -1, -1 } /* terminator */
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}, *ctypep;
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u_int16_t fbtype;
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/* check reverse color */
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fbtype = bootinfo->fb_type;
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for (ctypep = ctype; ctypep->normal != -1 ; ctypep++) {
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if (fbtype == ctypep->normal) {
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return (0);
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} else if (fbtype == ctypep->reverse) {
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return (1);
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}
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}
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printf(": WARNING unknown frame buffer type 0x%04x.\n", fbtype);
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return (0);
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}
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