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freebsd/sys/dev/syscons/scvtb.c
Kazutaka YOKOTA 2317b70167 Don't free buffers we didn't allocate. 
MFC after:	2 weeks
2001-06-29 08:24:56 +00:00

300 lines
7.6 KiB
C
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/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* All rights reserved.
*
* 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 as
* the first lines of this file unmodified.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
*
* $FreeBSD$
*/
#include "opt_syscons.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/fbio.h>
#include <sys/consio.h>
#include <machine/md_var.h>
#include <machine/bus.h>
#include <dev/fb/fbreg.h>
#include <dev/syscons/syscons.h>
#define vtb_wrap(vtb, at, offset) \
(((at) + (offset) + (vtb)->vtb_size)%(vtb)->vtb_size)
void
sc_vtb_init(sc_vtb_t *vtb, int type, int cols, int rows, void *buf, int wait)
{
vtb->vtb_flags = 0;
vtb->vtb_type = type;
vtb->vtb_cols = cols;
vtb->vtb_rows = rows;
vtb->vtb_size = cols*rows;
vtb->vtb_buffer = NULL;
vtb->vtb_tail = 0;
switch (type) {
case VTB_MEMORY:
case VTB_RINGBUFFER:
if ((buf == NULL) && (cols*rows != 0)) {
vtb->vtb_buffer =
(vm_offset_t)malloc(cols*rows*sizeof(u_int16_t),
M_DEVBUF,
(wait) ? M_WAITOK : M_NOWAIT);
if (vtb->vtb_buffer != NULL) {
bzero((void *)sc_vtb_pointer(vtb, 0),
cols*rows*sizeof(u_int16_t));
vtb->vtb_flags |= VTB_ALLOCED;
}
} else {
vtb->vtb_buffer = (vm_offset_t)buf;
}
vtb->vtb_flags |= VTB_VALID;
break;
case VTB_FRAMEBUFFER:
vtb->vtb_buffer = (vm_offset_t)buf;
vtb->vtb_flags |= VTB_VALID;
break;
default:
break;
}
}
void
sc_vtb_destroy(sc_vtb_t *vtb)
{
vm_offset_t p;
vtb->vtb_cols = 0;
vtb->vtb_rows = 0;
vtb->vtb_size = 0;
vtb->vtb_tail = 0;
p = vtb->vtb_buffer;
vtb->vtb_buffer = NULL;
switch (vtb->vtb_type) {
case VTB_MEMORY:
case VTB_RINGBUFFER:
if ((vtb->vtb_flags & VTB_ALLOCED) && (p != NULL))
free((void *)p, M_DEVBUF);
break;
default:
break;
}
vtb->vtb_flags = 0;
vtb->vtb_type = VTB_INVALID;
}
size_t
sc_vtb_size(int cols, int rows)
{
return (size_t)(cols*rows*sizeof(u_int16_t));
}
int
sc_vtb_getc(sc_vtb_t *vtb, int at)
{
if (vtb->vtb_type == VTB_FRAMEBUFFER)
return (readw(sc_vtb_pointer(vtb, at)) & 0x00ff);
else
return (*(u_int16_t *)sc_vtb_pointer(vtb, at) & 0x00ff);
}
int
sc_vtb_geta(sc_vtb_t *vtb, int at)
{
if (vtb->vtb_type == VTB_FRAMEBUFFER)
return (readw(sc_vtb_pointer(vtb, at)) & 0xff00);
else
return (*(u_int16_t *)sc_vtb_pointer(vtb, at) & 0xff00);
}
void
sc_vtb_putc(sc_vtb_t *vtb, int at, int c, int a)
{
if (vtb->vtb_type == VTB_FRAMEBUFFER)
writew(sc_vtb_pointer(vtb, at), a | c);
else
*(u_int16_t *)sc_vtb_pointer(vtb, at) = a | c;
}
vm_offset_t
sc_vtb_putchar(sc_vtb_t *vtb, vm_offset_t p, int c, int a)
{
if (vtb->vtb_type == VTB_FRAMEBUFFER)
writew(p, a | c);
else
*(u_int16_t *)p = a | c;
return (p + sizeof(u_int16_t));
}
vm_offset_t
sc_vtb_pointer(sc_vtb_t *vtb, int at)
{
return (vtb->vtb_buffer + sizeof(u_int16_t)*(at));
}
int
sc_vtb_pos(sc_vtb_t *vtb, int pos, int offset)
{
return ((pos + offset + vtb->vtb_size)%vtb->vtb_size);
}
void
sc_vtb_clear(sc_vtb_t *vtb, int c, int attr)
{
if (vtb->vtb_type == VTB_FRAMEBUFFER)
fillw_io(attr | c, sc_vtb_pointer(vtb, 0), vtb->vtb_size);
else
fillw(attr | c, (void *)sc_vtb_pointer(vtb, 0), vtb->vtb_size);
}
void
sc_vtb_copy(sc_vtb_t *vtb1, int from, sc_vtb_t *vtb2, int to, int count)
{
/* XXX if both are VTB_VRAMEBUFFER... */
if (vtb2->vtb_type == VTB_FRAMEBUFFER) {
bcopy_toio(sc_vtb_pointer(vtb1, from),
sc_vtb_pointer(vtb2, to),
count*sizeof(u_int16_t));
} else if (vtb1->vtb_type == VTB_FRAMEBUFFER) {
bcopy_fromio(sc_vtb_pointer(vtb1, from),
sc_vtb_pointer(vtb2, to),
count*sizeof(u_int16_t));
} else {
bcopy((void *)sc_vtb_pointer(vtb1, from),
(void *)sc_vtb_pointer(vtb2, to),
count*sizeof(u_int16_t));
}
}
void
sc_vtb_append(sc_vtb_t *vtb1, int from, sc_vtb_t *vtb2, int count)
{
int len;
if (vtb2->vtb_type != VTB_RINGBUFFER)
return;
while (count > 0) {
len = imin(count, vtb2->vtb_size - vtb2->vtb_tail);
if (vtb1->vtb_type == VTB_FRAMEBUFFER) {
bcopy_fromio(sc_vtb_pointer(vtb1, from),
sc_vtb_pointer(vtb2, vtb2->vtb_tail),
len*sizeof(u_int16_t));
} else {
bcopy((void *)sc_vtb_pointer(vtb1, from),
(void *)sc_vtb_pointer(vtb2, vtb2->vtb_tail),
len*sizeof(u_int16_t));
}
from += len;
count -= len;
vtb2->vtb_tail = vtb_wrap(vtb2, vtb2->vtb_tail, len);
}
}
void
sc_vtb_seek(sc_vtb_t *vtb, int pos)
{
vtb->vtb_tail = pos%vtb->vtb_size;
}
void
sc_vtb_erase(sc_vtb_t *vtb, int at, int count, int c, int attr)
{
if (at + count > vtb->vtb_size)
count = vtb->vtb_size - at;
if (vtb->vtb_type == VTB_FRAMEBUFFER)
fillw_io(attr | c, sc_vtb_pointer(vtb, at), count);
else
fillw(attr | c, (void *)sc_vtb_pointer(vtb, at), count);
}
void
sc_vtb_move(sc_vtb_t *vtb, int from, int to, int count)
{
if (from + count > vtb->vtb_size)
count = vtb->vtb_size - from;
if (to + count > vtb->vtb_size)
count = vtb->vtb_size - to;
if (count <= 0)
return;
if (vtb->vtb_type == VTB_FRAMEBUFFER) {
bcopy_io(sc_vtb_pointer(vtb, from),
sc_vtb_pointer(vtb, to), count*sizeof(u_int16_t));
} else {
bcopy((void *)sc_vtb_pointer(vtb, from),
(void *)sc_vtb_pointer(vtb, to), count*sizeof(u_int16_t));
}
}
void
sc_vtb_delete(sc_vtb_t *vtb, int at, int count, int c, int attr)
{
int len;
if (at + count > vtb->vtb_size)
count = vtb->vtb_size - at;
len = vtb->vtb_size - at - count;
if (len > 0) {
if (vtb->vtb_type == VTB_FRAMEBUFFER) {
bcopy_io(sc_vtb_pointer(vtb, at + count),
sc_vtb_pointer(vtb, at),
len*sizeof(u_int16_t));
} else {
bcopy((void *)sc_vtb_pointer(vtb, at + count),
(void *)sc_vtb_pointer(vtb, at),
len*sizeof(u_int16_t));
}
}
if (vtb->vtb_type == VTB_FRAMEBUFFER)
fillw_io(attr | c, sc_vtb_pointer(vtb, at + len),
vtb->vtb_size - at - len);
else
fillw(attr | c, (void *)sc_vtb_pointer(vtb, at + len),
vtb->vtb_size - at - len);
}
void
sc_vtb_ins(sc_vtb_t *vtb, int at, int count, int c, int attr)
{
if (at + count > vtb->vtb_size) {
count = vtb->vtb_size - at;
} else {
if (vtb->vtb_type == VTB_FRAMEBUFFER) {
bcopy_io(sc_vtb_pointer(vtb, at),
sc_vtb_pointer(vtb, at + count),
(vtb->vtb_size - at - count)*sizeof(u_int16_t));
} else {
bcopy((void *)sc_vtb_pointer(vtb, at),
(void *)sc_vtb_pointer(vtb, at + count),
(vtb->vtb_size - at - count)*sizeof(u_int16_t));
}
}
if (vtb->vtb_type == VTB_FRAMEBUFFER)
fillw_io(attr | c, sc_vtb_pointer(vtb, at), count);
else
fillw(attr | c, (void *)sc_vtb_pointer(vtb, at), count);
}
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