freebsd-dev/sys/pc98/cbus/scgdcrndr.c
Peter Wemm f41325db5f With this commit, I hereby pronounce gensetdefs past its use-by date.
Replace the a.out emulation of 'struct linker_set' with something
a little more flexible.  <sys/linker_set.h> now provides macros for
accessing elements and completely hides the implementation.

The linker_set.h macros have been on the back burner in various
forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()),
John Polstra (ELF clue) and myself (cleaned up API and the conversion
of the rest of the kernel to use it).

The macros declare a strongly typed set.  They return elements with the
type that you declare the set with, rather than a generic void *.

For ELF, we use the magic ld symbols (__start_<setname> and
__stop_<setname>).  Thanks to Richard Henderson <rth@redhat.com> for the
trick about how to force ld to provide them for kld's.

For a.out, we use the old linker_set struct.

NOTE: the item lists are no longer null terminated.  This is why
the code impact is high in certain areas.

The runtime linker has a new method to find the linker set
boundaries depending on which backend format is in use.

linker sets are still module/kld unfriendly and should never be used
for anything that may be modular one day.

Reviewed by:	eivind
2001-06-13 10:58:39 +00:00

196 lines
4.7 KiB
C

/*-
* Copyright (c) 1999 FreeBSD(98) Porting Team.
* 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 "opt_gdc.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/consio.h>
#include <sys/fbio.h>
#include <dev/fb/fbreg.h>
#include <dev/syscons/syscons.h>
#ifndef SC_RENDER_DEBUG
#define SC_RENDER_DEBUG 0
#endif
static vr_clear_t gdc_txtclear;
static vr_draw_border_t gdc_txtborder;
static vr_draw_t gdc_txtdraw;
static vr_set_cursor_t gdc_txtcursor_shape;
static vr_draw_cursor_t gdc_txtcursor;
#ifndef SC_NO_CUTPASTE
static vr_draw_mouse_t gdc_txtmouse;
#else
#define gdc_txtmouse (vr_draw_mouse_t *)gdc_nop
#endif
#ifndef SC_NO_MODE_CHANGE
static vr_draw_border_t gdc_grborder;
#endif
static void gdc_nop(scr_stat *scp, ...);
static sc_rndr_sw_t txtrndrsw = {
gdc_txtclear,
gdc_txtborder,
gdc_txtdraw,
gdc_txtcursor_shape,
gdc_txtcursor,
(vr_blink_cursor_t *)gdc_nop,
(vr_set_mouse_t *)gdc_nop,
gdc_txtmouse,
};
RENDERER(gdc, 0, txtrndrsw, gdc_set);
#ifndef SC_NO_MODE_CHANGE
static sc_rndr_sw_t grrndrsw = {
(vr_clear_t *)gdc_nop,
gdc_grborder,
(vr_draw_t *)gdc_nop,
(vr_set_cursor_t *)gdc_nop,
(vr_draw_cursor_t *)gdc_nop,
(vr_blink_cursor_t *)gdc_nop,
(vr_set_mouse_t *)gdc_nop,
(vr_draw_mouse_t *)gdc_nop,
};
RENDERER(gdc, GRAPHICS_MODE, grrndrsw, gdc_set);
#endif /* SC_NO_MODE_CHANGE */
RENDERER_MODULE(gdc, gdc_set);
static void
gdc_nop(scr_stat *scp, ...)
{
}
/* text mode renderer */
static void
gdc_txtclear(scr_stat *scp, int c, int attr)
{
sc_vtb_clear(&scp->scr, c, attr);
}
static void
gdc_txtborder(scr_stat *scp, int color)
{
(*vidsw[scp->sc->adapter]->set_border)(scp->sc->adp, color);
}
static void
gdc_txtdraw(scr_stat *scp, int from, int count, int flip)
{
vm_offset_t p;
int c;
int a;
if (from + count > scp->xsize*scp->ysize)
count = scp->xsize*scp->ysize - from;
if (flip) {
p = sc_vtb_pointer(&scp->scr, from);
for (; count-- > 0; ++from) {
c = sc_vtb_getc(&scp->vtb, from);
a = sc_vtb_geta(&scp->vtb, from) ^ 0x4;
sc_vtb_putchar(&scp->scr, p, c, a);
}
} else {
sc_vtb_copy(&scp->vtb, from, &scp->scr, from, count);
}
}
static void
gdc_txtcursor_shape(scr_stat *scp, int base, int height, int blink)
{
if (base < 0 || base >= scp->font_size)
return;
/* the caller may set height <= 0 in order to disable the cursor */
(*vidsw[scp->sc->adapter]->set_hw_cursor_shape)(scp->sc->adp,
base, height,
scp->font_size, blink);
}
static void
gdc_txtcursor(scr_stat *scp, int at, int blink, int on, int flip)
{
if (on) {
scp->status |= VR_CURSOR_ON;
(*vidsw[scp->sc->adapter]->set_hw_cursor)(scp->sc->adp,
at%scp->xsize, at/scp->xsize);
} else {
if (scp->status & VR_CURSOR_ON)
(*vidsw[scp->sc->adapter]->set_hw_cursor)(scp->sc->adp,
-1, -1);
scp->status &= ~VR_CURSOR_ON;
}
}
#ifndef SC_NO_CUTPASTE
static void
draw_txtmouse(scr_stat *scp, int x, int y)
{
int at;
at = (y/scp->font_size - scp->yoff)*scp->xsize + x/8 - scp->xoff;
sc_vtb_putc(&scp->scr, at,
sc_vtb_getc(&scp->scr, at),
sc_vtb_geta(&scp->scr, at) ^ 0x4);
}
static void
remove_txtmouse(scr_stat *scp, int x, int y)
{
}
static void
gdc_txtmouse(scr_stat *scp, int x, int y, int on)
{
if (on)
draw_txtmouse(scp, x, y);
else
remove_txtmouse(scp, x, y);
}
#endif /* SC_NO_CUTPASTE */
#ifndef SC_NO_MODE_CHANGE
/* graphics mode renderer */
static void
gdc_grborder(scr_stat *scp, int color)
{
(*vidsw[scp->sc->adapter]->set_border)(scp->sc->adp, color);
}
#endif /* SC_NO_MODE_CHANGE */