The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/vga.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    3  * Copyright (c) 1992-1998 Søren Schmidt
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer as
   11  *    the first lines of this file unmodified.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  *
   29  * $FreeBSD$
   30  */
   31 
   32 #include "opt_vga.h"
   33 #include "opt_fb.h"
   34 #include "opt_syscons.h"        /* should be removed in the future, XXX */
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/kernel.h>
   39 #include <sys/conf.h>
   40 #include <sys/proc.h>
   41 #include <sys/fcntl.h>
   42 #include <sys/malloc.h>
   43 #include <sys/fbio.h>
   44 
   45 #include <vm/vm.h>
   46 #include <vm/vm_param.h>
   47 #include <vm/pmap.h>
   48 
   49 #include <machine/md_var.h>
   50 #include <machine/pc/bios.h>
   51 
   52 #include <dev/fb/fbreg.h>
   53 #include <dev/fb/vgareg.h>
   54 
   55 #include <isa/isareg.h>
   56 
   57 #ifndef VGA_DEBUG
   58 #define VGA_DEBUG               0
   59 #endif
   60 
   61 int
   62 vga_probe_unit(int unit, video_adapter_t *buf, int flags)
   63 {
   64         video_adapter_t *adp;
   65         video_switch_t *sw;
   66         int error;
   67 
   68         sw = vid_get_switch(VGA_DRIVER_NAME);
   69         if (sw == NULL)
   70                 return 0;
   71         error = (*sw->probe)(unit, &adp, NULL, flags);
   72         if (error)
   73                 return error;
   74         bcopy(adp, buf, sizeof(*buf));
   75         return 0;
   76 }
   77 
   78 int
   79 vga_attach_unit(int unit, vga_softc_t *sc, int flags)
   80 {
   81         video_switch_t *sw;
   82         int error;
   83 
   84         sw = vid_get_switch(VGA_DRIVER_NAME);
   85         if (sw == NULL)
   86                 return ENXIO;
   87 
   88         error = (*sw->probe)(unit, &sc->adp, NULL, flags);
   89         if (error)
   90                 return error;
   91         return (*sw->init)(unit, sc->adp, flags);
   92 }
   93 
   94 /* cdev driver functions */
   95 
   96 #ifdef FB_INSTALL_CDEV
   97 
   98 int
   99 vga_open(dev_t dev, vga_softc_t *sc, int flag, int mode, struct proc *p)
  100 {
  101         if (sc == NULL)
  102                 return ENXIO;
  103         if (mode & (O_CREAT | O_APPEND | O_TRUNC))
  104                 return ENODEV;
  105 
  106         return genfbopen(&sc->gensc, sc->adp, flag, mode, p);
  107 }
  108 
  109 int
  110 vga_close(dev_t dev, vga_softc_t *sc, int flag, int mode, struct proc *p)
  111 {
  112         return genfbclose(&sc->gensc, sc->adp, flag, mode, p);
  113 }
  114 
  115 int
  116 vga_read(dev_t dev, vga_softc_t *sc, struct uio *uio, int flag)
  117 {
  118         return genfbread(&sc->gensc, sc->adp, uio, flag);
  119 }
  120 
  121 int
  122 vga_write(dev_t dev, vga_softc_t *sc, struct uio *uio, int flag)
  123 {
  124         return genfbread(&sc->gensc, sc->adp, uio, flag);
  125 }
  126 
  127 int
  128 vga_ioctl(dev_t dev, vga_softc_t *sc, u_long cmd, caddr_t arg, int flag,
  129           struct proc *p)
  130 {
  131         return genfbioctl(&sc->gensc, sc->adp, cmd, arg, flag, p);
  132 }
  133 
  134 int
  135 vga_mmap(dev_t dev, vga_softc_t *sc, vm_offset_t offset, int prot)
  136 {
  137         return genfbmmap(&sc->gensc, sc->adp, offset, prot);
  138 }
  139 
  140 #endif /* FB_INSTALL_CDEV */
  141 
  142 /* LOW-LEVEL */
  143 
  144 #include <machine/clock.h>
  145 #include <machine/pc/vesa.h>
  146 
  147 #define probe_done(adp)         ((adp)->va_flags & V_ADP_PROBED)
  148 #define init_done(adp)          ((adp)->va_flags & V_ADP_INITIALIZED)
  149 #define config_done(adp)        ((adp)->va_flags & V_ADP_REGISTERED)
  150 
  151 /* for compatibility with old kernel options */
  152 #ifdef SC_ALT_SEQACCESS
  153 #undef SC_ALT_SEQACCESS
  154 #undef VGA_ALT_SEQACCESS
  155 #define VGA_ALT_SEQACCESS       1
  156 #endif
  157 
  158 #ifdef SLOW_VGA
  159 #undef SLOW_VGA
  160 #undef VGA_SLOW_IOACCESS
  161 #define VGA_SLOW_IOACCESS       1
  162 #endif
  163 
  164 /* architecture dependent option */
  165 #ifdef __alpha__
  166 #define VGA_NO_BIOS             1
  167 #endif
  168 
  169 /* this should really be in `rtc.h' */
  170 #define RTC_EQUIPMENT           0x14
  171 
  172 /* various sizes */
  173 #define V_MODE_MAP_SIZE         (M_VGA_CG320 + 1)
  174 #define V_MODE_PARAM_SIZE       64
  175 
  176 /* video adapter state buffer */
  177 struct adp_state {
  178     int                 sig;
  179 #define V_STATE_SIG     0x736f6962
  180     u_char              regs[V_MODE_PARAM_SIZE];
  181 };
  182 typedef struct adp_state adp_state_t;
  183 
  184 /* video adapter information */
  185 #define DCC_MONO        0
  186 #define DCC_CGA40       1
  187 #define DCC_CGA80       2
  188 #define DCC_EGAMONO     3
  189 #define DCC_EGA40       4
  190 #define DCC_EGA80       5
  191 
  192 /* 
  193  * NOTE: `va_window' should have a virtual address, but is initialized
  194  * with a physical address in the following table, as verify_adapter()
  195  * will perform address conversion at run-time.
  196  */
  197 static video_adapter_t adapter_init_value[] = {
  198     /* DCC_MONO */
  199     { 0, KD_MONO, "mda", 0, 0, 0,           IO_MDA, IO_MDASIZE, MONO_CRTC,
  200       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 
  201       0, 0, 0, 0, 7, 0, },
  202     /* DCC_CGA40 */
  203     { 0, KD_CGA,  "cga", 0, 0, V_ADP_COLOR, IO_CGA, IO_CGASIZE, COLOR_CRTC,
  204       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
  205       0, 0, 0, 0, 3, 0, },
  206     /* DCC_CGA80 */
  207     { 0, KD_CGA,  "cga", 0, 0, V_ADP_COLOR, IO_CGA, IO_CGASIZE, COLOR_CRTC,
  208       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
  209       0, 0, 0, 0, 3, 0, },
  210     /* DCC_EGAMONO */
  211     { 0, KD_EGA,  "ega", 0, 0, 0,           IO_MDA, 48,   MONO_CRTC,
  212       EGA_BUF_BASE, EGA_BUF_SIZE, MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 
  213       0, 0, 0, 0, 7, 0, },
  214     /* DCC_EGA40 */
  215     { 0, KD_EGA,  "ega", 0, 0, V_ADP_COLOR, IO_MDA, 48,   COLOR_CRTC,
  216       EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
  217       0, 0, 0, 0, 3, 0, },
  218     /* DCC_EGA80 */
  219     { 0, KD_EGA,  "ega", 0, 0, V_ADP_COLOR, IO_MDA, 48,   COLOR_CRTC,
  220       EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
  221       0, 0, 0, 0, 3, 0, },
  222 };
  223 
  224 static video_adapter_t  biosadapter[2];
  225 static int              biosadapters = 0;
  226 
  227 /* video driver declarations */
  228 static int                      vga_configure(int flags);
  229        int                      (*vga_sub_configure)(int flags);
  230 #if 0
  231 static int                      vga_nop(void);
  232 #endif
  233 static int                      vga_error(void);
  234 static vi_probe_t               vga_probe;
  235 static vi_init_t                vga_init;
  236 static vi_get_info_t            vga_get_info;
  237 static vi_query_mode_t          vga_query_mode;
  238 static vi_set_mode_t            vga_set_mode;
  239 static vi_save_font_t           vga_save_font;
  240 static vi_load_font_t           vga_load_font;
  241 static vi_show_font_t           vga_show_font;
  242 static vi_save_palette_t        vga_save_palette;
  243 static vi_load_palette_t        vga_load_palette;
  244 static vi_set_border_t          vga_set_border;
  245 static vi_save_state_t          vga_save_state;
  246 static vi_load_state_t          vga_load_state;
  247 static vi_set_win_org_t         vga_set_origin;
  248 static vi_read_hw_cursor_t      vga_read_hw_cursor;
  249 static vi_set_hw_cursor_t       vga_set_hw_cursor;
  250 static vi_set_hw_cursor_shape_t vga_set_hw_cursor_shape;
  251 static vi_blank_display_t       vga_blank_display;
  252 static vi_mmap_t                vga_mmap_buf;
  253 static vi_ioctl_t               vga_dev_ioctl;
  254 #ifndef VGA_NO_MODE_CHANGE
  255 static vi_clear_t               vga_clear;
  256 static vi_fill_rect_t           vga_fill_rect;
  257 static vi_bitblt_t              vga_bitblt;
  258 #else /* VGA_NO_MODE_CHANGE */
  259 #define vga_clear               (vi_clear_t *)vga_error
  260 #define vga_fill_rect           (vi_fill_rect_t *)vga_error
  261 #define vga_bitblt              (vi_bitblt_t *)vga_error
  262 #endif
  263 static vi_diag_t                vga_diag;
  264 
  265 static video_switch_t vgavidsw = {
  266         vga_probe,
  267         vga_init,
  268         vga_get_info,
  269         vga_query_mode, 
  270         vga_set_mode,
  271         vga_save_font,
  272         vga_load_font,
  273         vga_show_font,
  274         vga_save_palette,
  275         vga_load_palette,
  276         vga_set_border,
  277         vga_save_state,
  278         vga_load_state,
  279         vga_set_origin,
  280         vga_read_hw_cursor,
  281         vga_set_hw_cursor,
  282         vga_set_hw_cursor_shape,
  283         vga_blank_display,
  284         vga_mmap_buf,
  285         vga_dev_ioctl,
  286         vga_clear,
  287         vga_fill_rect,
  288         vga_bitblt,
  289         vga_error,
  290         vga_error,
  291         vga_diag,
  292 };
  293 
  294 VIDEO_DRIVER(mda, vgavidsw, NULL);
  295 VIDEO_DRIVER(cga, vgavidsw, NULL);
  296 VIDEO_DRIVER(ega, vgavidsw, NULL);
  297 VIDEO_DRIVER(vga, vgavidsw, vga_configure);
  298 
  299 /* VGA BIOS standard video modes */
  300 #define EOT             (-1)
  301 #define NA              (-2)
  302 
  303 static video_info_t bios_vmode[] = {
  304     /* CGA */
  305     { M_B40x25,     V_INFO_COLOR, 40, 25, 8,  8, 2, 1,
  306       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  307     { M_C40x25,     V_INFO_COLOR, 40, 25, 8,  8, 4, 1,
  308       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  309     { M_B80x25,     V_INFO_COLOR, 80, 25, 8,  8, 2, 1,
  310       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  311     { M_C80x25,     V_INFO_COLOR, 80, 25, 8,  8, 4, 1,
  312       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  313     /* EGA */
  314     { M_ENH_B40x25, V_INFO_COLOR, 40, 25, 8, 14, 2, 1,
  315       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  316     { M_ENH_C40x25, V_INFO_COLOR, 40, 25, 8, 14, 4, 1,
  317       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  318     { M_ENH_B80x25, V_INFO_COLOR, 80, 25, 8, 14, 2, 1,
  319       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  320     { M_ENH_C80x25, V_INFO_COLOR, 80, 25, 8, 14, 4, 1,
  321       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  322     /* VGA */
  323     { M_VGA_C40x25, V_INFO_COLOR, 40, 25, 8, 16, 4, 1,
  324       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  325     { M_VGA_M80x25, 0,            80, 25, 8, 16, 2, 1,
  326       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  327     { M_VGA_C80x25, V_INFO_COLOR, 80, 25, 8, 16, 4, 1,
  328       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  329     /* MDA */
  330     { M_EGAMONO80x25, 0,          80, 25, 8, 14, 2, 1,
  331       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  332     /* EGA */
  333     { M_ENH_B80x43, 0,            80, 43, 8,  8, 2, 1,
  334       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  335     { M_ENH_C80x43, V_INFO_COLOR, 80, 43, 8,  8, 4, 1,
  336       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  337     /* VGA */
  338     { M_VGA_M80x30, 0,            80, 30, 8, 16, 2, 1,
  339       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  340     { M_VGA_C80x30, V_INFO_COLOR, 80, 30, 8, 16, 4, 1,
  341       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  342     { M_VGA_M80x50, 0,            80, 50, 8,  8, 2, 1,
  343       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  344     { M_VGA_C80x50, V_INFO_COLOR, 80, 50, 8,  8, 4, 1,
  345       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  346     { M_VGA_M80x60, 0,            80, 60, 8,  8, 2, 1,
  347       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  348     { M_VGA_C80x60, V_INFO_COLOR, 80, 60, 8,  8, 4, 1,
  349       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  350 
  351 #ifndef VGA_NO_MODE_CHANGE
  352 
  353 #ifdef VGA_WIDTH90
  354     { M_VGA_M90x25, 0,            90, 25, 8, 16, 2, 1,
  355       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  356     { M_VGA_C90x25, V_INFO_COLOR, 90, 25, 8, 16, 4, 1,
  357       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  358     { M_VGA_M90x30, 0,            90, 30, 8, 16, 2, 1,
  359       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  360     { M_VGA_C90x30, V_INFO_COLOR, 90, 30, 8, 16, 4, 1,
  361       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  362     { M_VGA_M90x43, 0,            90, 43, 8,  8, 2, 1,
  363       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  364     { M_VGA_C90x43, V_INFO_COLOR, 90, 43, 8,  8, 4, 1,
  365       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  366     { M_VGA_M90x50, 0,            90, 50, 8,  8, 2, 1,
  367       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  368     { M_VGA_C90x50, V_INFO_COLOR, 90, 50, 8,  8, 4, 1,
  369       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  370     { M_VGA_M90x60, 0,            90, 60, 8,  8, 2, 1,
  371       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  372     { M_VGA_C90x60, V_INFO_COLOR, 90, 60, 8,  8, 4, 1,
  373       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  374 #endif /* VGA_WIDTH90 */
  375 
  376     /* CGA */
  377     { M_BG320,      V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 2, 1,
  378       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_CGA },
  379     { M_CG320,      V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 2, 1,
  380       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_CGA },
  381     { M_BG640,      V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8,  8, 1, 1,
  382       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_CGA },
  383     /* EGA */
  384     { M_CG320_D,    V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 4, 4,
  385       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0,
  386       V_INFO_MM_PLANAR },
  387     { M_CG640_E,    V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8,  8, 4, 4,
  388       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  389       V_INFO_MM_PLANAR },
  390     { M_EGAMONOAPA, V_INFO_GRAPHICS,                640, 350, 8, 14, 4, 4,
  391       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, 64*1024, 0, 0 ,
  392       V_INFO_MM_PLANAR },
  393     { M_ENHMONOAPA2,V_INFO_GRAPHICS,                640, 350, 8, 14, 4, 4,
  394       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  395       V_INFO_MM_PLANAR },
  396     { M_CG640x350,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 2, 2,
  397       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  398       V_INFO_MM_PLANAR },
  399     { M_ENH_CG640,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 4, 4,
  400       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  401       V_INFO_MM_PLANAR },
  402     /* VGA */
  403     { M_BG640x480,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
  404       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  405       V_INFO_MM_PLANAR },
  406     { M_CG640x480,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
  407       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  408       V_INFO_MM_PLANAR },
  409     { M_VGA_CG320,  V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 8, 1,
  410       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0,
  411       V_INFO_MM_PACKED, 1 },
  412     { M_VGA_MODEX,  V_INFO_COLOR | V_INFO_GRAPHICS, 320, 240, 8,  8, 8, 4,
  413       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0,
  414       V_INFO_MM_VGAX, 1 },
  415 #endif /* VGA_NO_MODE_CHANGE */
  416 
  417     { EOT },
  418 };
  419 
  420 static int              vga_init_done = FALSE;
  421 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  422 static u_char           *video_mode_ptr = NULL;         /* EGA/VGA */
  423 static u_char           *video_mode_ptr2 = NULL;        /* CGA/MDA */
  424 #endif
  425 static u_char           *mode_map[V_MODE_MAP_SIZE];
  426 static adp_state_t      adpstate;
  427 static adp_state_t      adpstate2;
  428 static int              rows_offset = 1;
  429 
  430 /* local macros and functions */
  431 #define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
  432 
  433 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  434 static void map_mode_table(u_char *map[], u_char *table, int max);
  435 #endif
  436 static void clear_mode_map(video_adapter_t *adp, u_char *map[], int max,
  437                            int color);
  438 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  439 static int map_mode_num(int mode);
  440 #endif
  441 static int map_gen_mode_num(int type, int color, int mode);
  442 static int map_bios_mode_num(int type, int color, int bios_mode);
  443 static u_char *get_mode_param(int mode);
  444 #ifndef VGA_NO_BIOS
  445 static void fill_adapter_param(int code, video_adapter_t *adp);
  446 #endif
  447 static int verify_adapter(video_adapter_t *adp);
  448 static void update_adapter_info(video_adapter_t *adp, video_info_t *info);
  449 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  450 #define COMP_IDENTICAL  0
  451 #define COMP_SIMILAR    1
  452 #define COMP_DIFFERENT  2
  453 static int comp_adpregs(u_char *buf1, u_char *buf2);
  454 #endif
  455 static int probe_adapters(void);
  456 static int set_line_length(video_adapter_t *adp, int pixel);
  457 static int set_display_start(video_adapter_t *adp, int x, int y);
  458 static void filll_io(int val, vm_offset_t d, size_t size);
  459 
  460 #ifndef VGA_NO_MODE_CHANGE
  461 #ifdef VGA_WIDTH90
  462 static void set_width90(adp_state_t *params);
  463 #endif
  464 #endif /* !VGA_NO_MODE_CHANGE */
  465 
  466 #ifndef VGA_NO_FONT_LOADING
  467 #define PARAM_BUFSIZE   6
  468 static void set_font_mode(video_adapter_t *adp, u_char *buf);
  469 static void set_normal_mode(video_adapter_t *adp, u_char *buf);
  470 #endif
  471 
  472 #ifndef VGA_NO_MODE_CHANGE
  473 static void planar_fill(video_adapter_t *adp, int val);
  474 static void packed_fill(video_adapter_t *adp, int val);
  475 static void direct_fill(video_adapter_t *adp, int val);
  476 #ifdef notyet
  477 static void planar_fill_rect(video_adapter_t *adp, int val, int x, int y,
  478                              int cx, int cy);
  479 static void packed_fill_rect(video_adapter_t *adp, int val, int x, int y,
  480                              int cx, int cy);
  481 static void direct_fill_rect16(video_adapter_t *adp, int val, int x, int y,
  482                                int cx, int cy);
  483 static void direct_fill_rect24(video_adapter_t *adp, int val, int x, int y,
  484                                int cx, int cy);
  485 static void direct_fill_rect32(video_adapter_t *adp, int val, int x, int y,
  486                                int cx, int cy);
  487 #endif /* notyet */
  488 #endif /* !VGA_NO_MODE_CHANGE */
  489 
  490 static void dump_buffer(u_char *buf, size_t len);
  491 
  492 #define ISMAPPED(pa, width)                             \
  493         (((pa) <= (u_long)0x1000 - (width))             \
  494          || ((pa) >= ISA_HOLE_START && (pa) <= 0x100000 - (width)))
  495 
  496 #define prologue(adp, flag, err)                        \
  497         if (!vga_init_done || !((adp)->va_flags & (flag)))      \
  498             return (err)
  499 
  500 /* a backdoor for the console driver */
  501 static int
  502 vga_configure(int flags)
  503 {
  504     int i;
  505 
  506     probe_adapters();
  507     for (i = 0; i < biosadapters; ++i) {
  508         if (!probe_done(&biosadapter[i]))
  509             continue;
  510         biosadapter[i].va_flags |= V_ADP_INITIALIZED;
  511         if (!config_done(&biosadapter[i])) {
  512             if (vid_register(&biosadapter[i]) < 0)
  513                 continue;
  514             biosadapter[i].va_flags |= V_ADP_REGISTERED;
  515         }
  516     }
  517     if (vga_sub_configure != NULL)
  518         (*vga_sub_configure)(flags);
  519 
  520     return biosadapters;
  521 }
  522 
  523 /* local subroutines */
  524 
  525 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  526 /* construct the mode parameter map */
  527 static void
  528 map_mode_table(u_char *map[], u_char *table, int max)
  529 {
  530     int i;
  531 
  532     for(i = 0; i < max; ++i)
  533         map[i] = table + i*V_MODE_PARAM_SIZE;
  534     for(; i < V_MODE_MAP_SIZE; ++i)
  535         map[i] = NULL;
  536 }
  537 #endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
  538 
  539 static void
  540 clear_mode_map(video_adapter_t *adp, u_char *map[], int max, int color)
  541 {
  542     video_info_t info;
  543     int i;
  544 
  545     /*
  546      * NOTE: we don't touch `bios_vmode[]' because it is shared
  547      * by all adapters.
  548      */
  549     for(i = 0; i < max; ++i) {
  550         if (vga_get_info(adp, i, &info))
  551             continue;
  552         if ((info.vi_flags & V_INFO_COLOR) != color)
  553             map[i] = NULL;
  554     }
  555 }
  556 
  557 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  558 /* map the non-standard video mode to a known mode number */
  559 static int
  560 map_mode_num(int mode)
  561 {
  562     static struct {
  563         int from;
  564         int to;
  565     } mode_map[] = {
  566         { M_ENH_B80x43, M_ENH_B80x25 },
  567         { M_ENH_C80x43, M_ENH_C80x25 },
  568         { M_VGA_M80x30, M_VGA_M80x25 },
  569         { M_VGA_C80x30, M_VGA_C80x25 },
  570         { M_VGA_M80x50, M_VGA_M80x25 },
  571         { M_VGA_C80x50, M_VGA_C80x25 },
  572         { M_VGA_M80x60, M_VGA_M80x25 },
  573         { M_VGA_C80x60, M_VGA_C80x25 },
  574 #ifdef VGA_WIDTH90
  575         { M_VGA_M90x25, M_VGA_M80x25 },
  576         { M_VGA_C90x25, M_VGA_C80x25 },
  577         { M_VGA_M90x30, M_VGA_M80x25 },
  578         { M_VGA_C90x30, M_VGA_C80x25 },
  579         { M_VGA_M90x43, M_ENH_B80x25 },
  580         { M_VGA_C90x43, M_ENH_C80x25 },
  581         { M_VGA_M90x50, M_VGA_M80x25 },
  582         { M_VGA_C90x50, M_VGA_C80x25 },
  583         { M_VGA_M90x60, M_VGA_M80x25 },
  584         { M_VGA_C90x60, M_VGA_C80x25 },
  585 #endif
  586         { M_VGA_MODEX,  M_VGA_CG320 },
  587     };
  588     int i;
  589 
  590     for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
  591         if (mode_map[i].from == mode)
  592             return mode_map[i].to;
  593     }
  594     return mode;
  595 }
  596 #endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
  597 
  598 /* map a generic video mode to a known mode number */
  599 static int
  600 map_gen_mode_num(int type, int color, int mode)
  601 {
  602     static struct {
  603         int from;
  604         int to_color;
  605         int to_mono;
  606     } mode_map[] = {
  607         { M_TEXT_80x30, M_VGA_C80x30, M_VGA_M80x30, },
  608         { M_TEXT_80x43, M_ENH_C80x43, M_ENH_B80x43, },
  609         { M_TEXT_80x50, M_VGA_C80x50, M_VGA_M80x50, },
  610         { M_TEXT_80x60, M_VGA_C80x60, M_VGA_M80x60, },
  611     };
  612     int i;
  613 
  614     if (mode == M_TEXT_80x25) {
  615         switch (type) {
  616 
  617         case KD_VGA:
  618             if (color)
  619                 return M_VGA_C80x25;
  620             else
  621                 return M_VGA_M80x25;
  622             break;
  623 
  624         case KD_EGA:
  625             if (color)
  626                 return M_ENH_C80x25;
  627             else
  628                 return M_EGAMONO80x25;
  629             break;
  630 
  631         case KD_CGA:
  632             return M_C80x25;
  633 
  634         case KD_MONO:
  635         case KD_HERCULES:
  636             return M_EGAMONO80x25;      /* XXX: this name is confusing */
  637 
  638         default:
  639             return -1;
  640         }
  641     }
  642 
  643     for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
  644         if (mode_map[i].from == mode)
  645             return ((color) ? mode_map[i].to_color : mode_map[i].to_mono);
  646     }
  647     return mode;
  648 }
  649 
  650 /* turn the BIOS video number into our video mode number */
  651 static int
  652 map_bios_mode_num(int type, int color, int bios_mode)
  653 {
  654     static int cga_modes[7] = {
  655         M_B40x25, M_C40x25,             /* 0, 1 */
  656         M_B80x25, M_C80x25,             /* 2, 3 */
  657         M_BG320, M_CG320,
  658         M_BG640,
  659     };
  660     static int ega_modes[17] = {
  661         M_ENH_B40x25, M_ENH_C40x25,     /* 0, 1 */
  662         M_ENH_B80x25, M_ENH_C80x25,     /* 2, 3 */
  663         M_BG320, M_CG320,
  664         M_BG640,
  665         M_EGAMONO80x25,                 /* 7 */
  666         8, 9, 10, 11, 12,
  667         M_CG320_D,
  668         M_CG640_E,
  669         M_ENHMONOAPA2,                  /* XXX: video momery > 64K */
  670         M_ENH_CG640,                    /* XXX: video momery > 64K */
  671     };
  672     static int vga_modes[20] = {
  673         M_VGA_C40x25, M_VGA_C40x25,     /* 0, 1 */
  674         M_VGA_C80x25, M_VGA_C80x25,     /* 2, 3 */
  675         M_BG320, M_CG320,
  676         M_BG640,
  677         M_VGA_M80x25,                   /* 7 */
  678         8, 9, 10, 11, 12,
  679         M_CG320_D,
  680         M_CG640_E,
  681         M_ENHMONOAPA2,
  682         M_ENH_CG640,
  683         M_BG640x480, M_CG640x480, 
  684         M_VGA_CG320,
  685     };
  686 
  687     switch (type) {
  688 
  689     case KD_VGA:
  690         if (bios_mode < sizeof(vga_modes)/sizeof(vga_modes[0]))
  691             return vga_modes[bios_mode];
  692         else if (color)
  693             return M_VGA_C80x25;
  694         else
  695             return M_VGA_M80x25;
  696         break;
  697 
  698     case KD_EGA:
  699         if (bios_mode < sizeof(ega_modes)/sizeof(ega_modes[0]))
  700             return ega_modes[bios_mode];
  701         else if (color)
  702             return M_ENH_C80x25;
  703         else
  704             return M_EGAMONO80x25;
  705         break;
  706 
  707     case KD_CGA:
  708         if (bios_mode < sizeof(cga_modes)/sizeof(cga_modes[0]))
  709             return cga_modes[bios_mode];
  710         else
  711             return M_C80x25;
  712         break;
  713 
  714     case KD_MONO:
  715     case KD_HERCULES:
  716         return M_EGAMONO80x25;          /* XXX: this name is confusing */
  717 
  718     default:
  719         break;
  720     }
  721     return -1;
  722 }
  723 
  724 /* look up a parameter table entry */
  725 static u_char 
  726 *get_mode_param(int mode)
  727 {
  728 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  729     if (mode >= V_MODE_MAP_SIZE)
  730         mode = map_mode_num(mode);
  731 #endif
  732     if ((mode >= 0) && (mode < V_MODE_MAP_SIZE))
  733         return mode_map[mode];
  734     else
  735         return NULL;
  736 }
  737 
  738 #ifndef VGA_NO_BIOS
  739 static void
  740 fill_adapter_param(int code, video_adapter_t *adp)
  741 {
  742     static struct {
  743         int primary;
  744         int secondary;
  745     } dcc[] = {
  746         { DCC_MONO,                     DCC_EGA40 /* CGA monitor */ },
  747         { DCC_MONO,                     DCC_EGA80 /* CGA monitor */ },
  748         { DCC_MONO,                     DCC_EGA80 },
  749         { DCC_MONO,                     DCC_EGA80 },
  750         { DCC_CGA40,                    DCC_EGAMONO },
  751         { DCC_CGA80,                    DCC_EGAMONO },
  752         { DCC_EGA40 /* CGA monitor */,  DCC_MONO},
  753         { DCC_EGA80 /* CGA monitor */,  DCC_MONO},
  754         { DCC_EGA80,                    DCC_MONO },     
  755         { DCC_EGA80,                    DCC_MONO },
  756         { DCC_EGAMONO,                  DCC_CGA40 },
  757         { DCC_EGAMONO,                  DCC_CGA80 },
  758     };
  759 
  760     if ((code < 0) || (code >= sizeof(dcc)/sizeof(dcc[0]))) {
  761         adp[V_ADP_PRIMARY] = adapter_init_value[DCC_MONO];
  762         adp[V_ADP_SECONDARY] = adapter_init_value[DCC_CGA80];
  763     } else {
  764         adp[V_ADP_PRIMARY] = adapter_init_value[dcc[code].primary];
  765         adp[V_ADP_SECONDARY] = adapter_init_value[dcc[code].secondary];
  766     }
  767 }
  768 #endif /* VGA_NO_BIOS */
  769 
  770 static int
  771 verify_adapter(video_adapter_t *adp)
  772 {
  773     vm_offset_t buf;
  774     u_int16_t v;
  775 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  776     u_int32_t p;
  777 #endif
  778 
  779     buf = BIOS_PADDRTOVADDR(adp->va_window);
  780     v = readw(buf);
  781     writew(buf, 0xA55A);
  782     if (readw(buf) != 0xA55A)
  783         return ENXIO;
  784     writew(buf, v);
  785 
  786     switch (adp->va_type) {
  787 
  788     case KD_EGA:
  789         outb(adp->va_crtc_addr, 7);
  790         if (inb(adp->va_crtc_addr) == 7) {
  791             adp->va_type = KD_VGA;
  792             adp->va_name = "vga";
  793             adp->va_flags |= V_ADP_STATESAVE | V_ADP_PALETTE;
  794         }
  795         adp->va_flags |= V_ADP_STATELOAD | V_ADP_BORDER;
  796         /* the color adapter may be in the 40x25 mode... XXX */
  797 
  798 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  799         /* get the BIOS video mode pointer */
  800         p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x4a8);
  801         p = BIOS_SADDRTOLADDR(p);
  802         if (ISMAPPED(p, sizeof(u_int32_t))) {
  803             p = *(u_int32_t *)BIOS_PADDRTOVADDR(p);
  804             p = BIOS_SADDRTOLADDR(p);
  805             if (ISMAPPED(p, V_MODE_PARAM_SIZE))
  806                 video_mode_ptr = (u_char *)BIOS_PADDRTOVADDR(p);
  807         }
  808 #endif
  809         break;
  810 
  811     case KD_CGA:
  812         adp->va_flags |= V_ADP_COLOR | V_ADP_BORDER;
  813         /* may be in the 40x25 mode... XXX */
  814 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  815         /* get the BIOS video mode pointer */
  816         p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x1d*4);
  817         p = BIOS_SADDRTOLADDR(p);
  818         video_mode_ptr2 = (u_char *)BIOS_PADDRTOVADDR(p);
  819 #endif
  820         break;
  821 
  822     case KD_MONO:
  823 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  824         /* get the BIOS video mode pointer */
  825         p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x1d*4);
  826         p = BIOS_SADDRTOLADDR(p);
  827         video_mode_ptr2 = (u_char *)BIOS_PADDRTOVADDR(p);
  828 #endif
  829         break;
  830     }
  831 
  832     return 0;
  833 }
  834 
  835 static void
  836 update_adapter_info(video_adapter_t *adp, video_info_t *info)
  837 {
  838     adp->va_flags &= ~V_ADP_COLOR;
  839     adp->va_flags |= 
  840         (info->vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
  841     adp->va_crtc_addr =
  842         (adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
  843     adp->va_window = BIOS_PADDRTOVADDR(info->vi_window);
  844     adp->va_window_size = info->vi_window_size;
  845     adp->va_window_gran = info->vi_window_gran;
  846     adp->va_window_orig = 0;
  847     /* XXX */
  848     adp->va_buffer = info->vi_buffer;
  849     adp->va_buffer_size = info->vi_buffer_size;
  850     if (info->vi_mem_model == V_INFO_MM_VGAX) {
  851         adp->va_line_width = info->vi_width/2;
  852     } else if (info->vi_flags & V_INFO_GRAPHICS) {
  853         switch (info->vi_depth/info->vi_planes) {
  854         case 1:
  855             adp->va_line_width = info->vi_width/8;
  856             break;
  857         case 2:
  858             adp->va_line_width = info->vi_width/4;
  859             break;
  860         case 4:
  861             adp->va_line_width = info->vi_width/2;
  862             break;
  863         case 8:
  864         default: /* shouldn't happen */
  865             adp->va_line_width = info->vi_width;
  866             break;
  867         }
  868     } else {
  869         adp->va_line_width = info->vi_width;
  870     }
  871     adp->va_disp_start.x = 0;
  872     adp->va_disp_start.y = 0;
  873     bcopy(info, &adp->va_info, sizeof(adp->va_info));
  874 }
  875 
  876 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  877 /* compare two parameter table entries */
  878 static int 
  879 comp_adpregs(u_char *buf1, u_char *buf2)
  880 {
  881     static struct {
  882         u_char mask;
  883     } params[V_MODE_PARAM_SIZE] = {
  884         {0xff}, {0x00}, {0xff},                 /* COLS}, ROWS}, POINTS */
  885         {0x00}, {0x00},                         /* page length */
  886         {0xfe}, {0xff}, {0xff}, {0xff},         /* sequencer registers */
  887         {0xf3},                                 /* misc register */
  888         {0xff}, {0xff}, {0xff}, {0x7f}, {0xff}, /* CRTC */
  889         {0xff}, {0xff}, {0xff}, {0x7f}, {0xff},
  890         {0x00}, {0x00}, {0x00}, {0x00}, {0x00},
  891         {0x00}, {0xff}, {0x7f}, {0xff}, {0xff},
  892         {0x7f}, {0xff}, {0xff}, {0xef}, {0xff},
  893         {0xff}, {0xff}, {0xff}, {0xff}, {0xff}, /* attribute controller regs */
  894         {0xff}, {0xff}, {0xff}, {0xff}, {0xff},
  895         {0xff}, {0xff}, {0xff}, {0xff}, {0xff},
  896         {0xff}, {0xff}, {0xff}, {0xff}, {0xf0},
  897         {0xff}, {0xff}, {0xff}, {0xff}, {0xff}, /* GDC register */
  898         {0xff}, {0xff}, {0xff}, {0xff}, 
  899     }; 
  900     int identical = TRUE;
  901     int i;
  902 
  903     if ((buf1 == NULL) || (buf2 == NULL))
  904         return COMP_DIFFERENT;
  905 
  906     for (i = 0; i < sizeof(params)/sizeof(params[0]); ++i) {
  907         if (params[i].mask == 0)        /* don't care */
  908             continue;
  909         if ((buf1[i] & params[i].mask) != (buf2[i] & params[i].mask))
  910             return COMP_DIFFERENT;
  911         if (buf1[i] != buf2[i])
  912             identical = FALSE;
  913     }
  914     return (identical) ? COMP_IDENTICAL : COMP_SIMILAR;
  915 }
  916 #endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
  917 
  918 /* probe video adapters and return the number of detected adapters */
  919 static int
  920 probe_adapters(void)
  921 {
  922     video_adapter_t *adp;
  923     video_info_t info;
  924 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  925     u_char *mp;
  926 #endif
  927     int i;
  928 
  929     /* do this test only once */
  930     if (vga_init_done)
  931         return biosadapters;
  932     vga_init_done = TRUE;
  933 
  934     /* 
  935      * Locate display adapters. 
  936      * The AT architecture supports upto two adapters. `syscons' allows
  937      * the following combinations of adapters: 
  938      *     1) MDA + CGA
  939      *     2) MDA + EGA/VGA color 
  940      *     3) CGA + EGA/VGA mono
  941      * Note that `syscons' doesn't bother with MCGA as it is only
  942      * avaiable for low end PS/2 models which has 80286 or earlier CPUs,
  943      * thus, they are not running FreeBSD!
  944      * When there are two adapaters in the system, one becomes `primary'
  945      * and the other `secondary'. The EGA adapter has a set of DIP 
  946      * switches on board for this information and the EGA BIOS copies 
  947      * it in the BIOS data area BIOSDATA_VIDEOSWITCH (40:88). 
  948      * The VGA BIOS has more sophisticated mechanism and has this 
  949      * information in BIOSDATA_DCCINDEX (40:8a), but it also maintains 
  950      * compatibility with the EGA BIOS by updating BIOSDATA_VIDEOSWITCH.
  951      */
  952 
  953     /* 
  954      * Check rtc and BIOS data area.
  955      * XXX: we don't use BIOSDATA_EQUIPMENT, since it is not a dead
  956      * copy of RTC_EQUIPMENT.  Bits 4 and 5 of ETC_EQUIPMENT are
  957      * zeros for EGA and VGA.  However, the EGA/VGA BIOS sets
  958      * these bits in BIOSDATA_EQUIPMENT according to the monitor
  959      * type detected.
  960      */
  961 #ifndef VGA_NO_BIOS
  962     if (*(u_int32_t *)BIOS_PADDRTOVADDR(0x4a8)) {
  963         /* EGA/VGA BIOS is present */
  964         fill_adapter_param(readb(BIOS_PADDRTOVADDR(0x488)) & 0x0f, 
  965                            biosadapter);
  966     } else {
  967         switch ((rtcin(RTC_EQUIPMENT) >> 4) & 3) {      /* bit 4 and 5 */
  968         case 0:
  969             /* EGA/VGA: shouldn't be happening */
  970             fill_adapter_param(readb(BIOS_PADDRTOVADDR(0x488)) & 0x0f, 
  971                                biosadapter);
  972             break;
  973         case 1:
  974             /* CGA 40x25 */
  975             /* FIXME: switch to the 80x25 mode? XXX */
  976             biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_CGA40];
  977             biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
  978             break;
  979         case 2:
  980             /* CGA 80x25 */
  981             biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_CGA80];
  982             biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
  983             break;
  984         case 3:
  985             /* MDA */
  986             biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_MONO];
  987             biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_CGA80];
  988             break;
  989         }
  990     }
  991 #else
  992     /* assume EGA/VGA? XXX */
  993     biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_EGA80];
  994     biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
  995 #endif /* VGA_NO_BIOS */
  996 
  997     biosadapters = 0;
  998     if (verify_adapter(&biosadapter[V_ADP_SECONDARY]) == 0) {
  999         ++biosadapters;
 1000         biosadapter[V_ADP_SECONDARY].va_flags |= V_ADP_PROBED;
 1001         biosadapter[V_ADP_SECONDARY].va_mode = 
 1002             biosadapter[V_ADP_SECONDARY].va_initial_mode =
 1003             map_bios_mode_num(biosadapter[V_ADP_SECONDARY].va_type, 
 1004                               biosadapter[V_ADP_SECONDARY].va_flags
 1005                                   & V_ADP_COLOR,
 1006                               biosadapter[V_ADP_SECONDARY].va_initial_bios_mode);
 1007     } else {
 1008         biosadapter[V_ADP_SECONDARY].va_type = -1;
 1009     }
 1010     if (verify_adapter(&biosadapter[V_ADP_PRIMARY]) == 0) {
 1011         ++biosadapters;
 1012         biosadapter[V_ADP_PRIMARY].va_flags |= V_ADP_PROBED;
 1013 #ifndef VGA_NO_BIOS
 1014         biosadapter[V_ADP_PRIMARY].va_initial_bios_mode = 
 1015             readb(BIOS_PADDRTOVADDR(0x449));
 1016 #else
 1017         biosadapter[V_ADP_PRIMARY].va_initial_bios_mode = 3;    /* XXX */
 1018 #endif
 1019         biosadapter[V_ADP_PRIMARY].va_mode = 
 1020             biosadapter[V_ADP_PRIMARY].va_initial_mode =
 1021             map_bios_mode_num(biosadapter[V_ADP_PRIMARY].va_type, 
 1022                               biosadapter[V_ADP_PRIMARY].va_flags & V_ADP_COLOR,
 1023                               biosadapter[V_ADP_PRIMARY].va_initial_bios_mode);
 1024     } else {
 1025         biosadapter[V_ADP_PRIMARY] = biosadapter[V_ADP_SECONDARY];
 1026         biosadapter[V_ADP_SECONDARY].va_type = -1;
 1027     }
 1028     if (biosadapters == 0)
 1029         return biosadapters;
 1030     biosadapter[V_ADP_PRIMARY].va_unit = V_ADP_PRIMARY;
 1031     biosadapter[V_ADP_SECONDARY].va_unit = V_ADP_SECONDARY;
 1032 
 1033 #if 0 /* we don't need these... */
 1034     fb_init_struct(&biosadapter[V_ADP_PRIMARY], ...);
 1035     fb_init_struct(&biosadapter[V_ADP_SECONDARY], ...);
 1036 #endif
 1037 
 1038 #if notyet
 1039     /*
 1040      * We cannot have two video adapter of the same type; there must be
 1041      * only one of color or mono adapter, or one each of them.
 1042      */
 1043     if (biosadapters > 1) {
 1044         if (!((biosadapter[0].va_flags ^ biosadapter[1].va_flags)
 1045               & V_ADP_COLOR))
 1046             /* we have two mono or color adapters!! */
 1047             return (biosadapters = 0);
 1048     }
 1049 #endif
 1050 
 1051     /*
 1052      * Ensure a zero start address.  This is mainly to recover after
 1053      * switching from pcvt using userconfig().  The registers are w/o
 1054      * for old hardware so it's too hard to relocate the active screen
 1055      * memory.
 1056      * This must be done before vga_save_state() for VGA.
 1057      */
 1058     outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr, 12);
 1059     outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr + 1, 0);
 1060     outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr, 13);
 1061     outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr + 1, 0);
 1062 
 1063     /* the video mode parameter table in EGA/VGA BIOS */
 1064     /* NOTE: there can be only one EGA/VGA, wheather color or mono,
 1065      * recognized by the video BIOS.
 1066      */
 1067     if ((biosadapter[V_ADP_PRIMARY].va_type == KD_EGA) ||
 1068         (biosadapter[V_ADP_PRIMARY].va_type == KD_VGA)) {
 1069         adp = &biosadapter[V_ADP_PRIMARY];
 1070     } else if ((biosadapter[V_ADP_SECONDARY].va_type == KD_EGA) ||
 1071                (biosadapter[V_ADP_SECONDARY].va_type == KD_VGA)) {
 1072         adp = &biosadapter[V_ADP_SECONDARY];
 1073     } else {
 1074         adp = NULL;
 1075     }
 1076     bzero(mode_map, sizeof(mode_map));
 1077     if (adp != NULL) {
 1078         if (adp->va_type == KD_VGA) {
 1079             vga_save_state(adp, &adpstate, sizeof(adpstate));
 1080 #if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
 1081             mode_map[adp->va_initial_mode] = adpstate.regs;
 1082             rows_offset = 1;
 1083 #else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
 1084             if (video_mode_ptr == NULL) {
 1085                 mode_map[adp->va_initial_mode] = adpstate.regs;
 1086                 rows_offset = 1;
 1087             } else {
 1088                 /* discard the table if we are not familiar with it... */
 1089                 map_mode_table(mode_map, video_mode_ptr, M_VGA_CG320 + 1);
 1090                 mp = get_mode_param(adp->va_initial_mode);
 1091                 if (mp != NULL)
 1092                     bcopy(mp, adpstate2.regs, sizeof(adpstate2.regs));
 1093                 switch (comp_adpregs(adpstate.regs, mp)) {
 1094                 case COMP_IDENTICAL:
 1095                     /*
 1096                      * OK, this parameter table looks reasonably familiar
 1097                      * to us...
 1098                      */
 1099                     /* 
 1100                      * This is a kludge for Toshiba DynaBook SS433 
 1101                      * whose BIOS video mode table entry has the actual # 
 1102                      * of rows at the offset 1; BIOSes from other 
 1103                      * manufacturers store the # of rows - 1 there. XXX
 1104                      */
 1105                     rows_offset = adpstate.regs[1] + 1 - mp[1];
 1106                     break;
 1107 
 1108                 case COMP_SIMILAR:
 1109                     /*
 1110                      * Not exactly the same, but similar enough to be
 1111                      * trusted. However, use the saved register values
 1112                      * for the initial mode and other modes which are
 1113                      * based on the initial mode.
 1114                      */
 1115                     mode_map[adp->va_initial_mode] = adpstate.regs;
 1116                     rows_offset = adpstate.regs[1] + 1 - mp[1];
 1117                     adpstate.regs[1] -= rows_offset - 1;
 1118                     break;
 1119 
 1120                 case COMP_DIFFERENT:
 1121                 default:
 1122                     /*
 1123                      * Don't use the paramter table in BIOS. It doesn't
 1124                      * look familiar to us. Video mode switching is allowed
 1125                      * only if the new mode is the same as or based on
 1126                      * the initial mode. 
 1127                      */
 1128                     video_mode_ptr = NULL;
 1129                     bzero(mode_map, sizeof(mode_map));
 1130                     mode_map[adp->va_initial_mode] = adpstate.regs;
 1131                     rows_offset = 1;
 1132                     break;
 1133                 }
 1134             }
 1135 #endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
 1136 
 1137 #ifndef VGA_NO_MODE_CHANGE
 1138             adp->va_flags |= V_ADP_MODECHANGE;
 1139 #endif
 1140 #ifndef VGA_NO_FONT_LOADING
 1141             adp->va_flags |= V_ADP_FONT;
 1142 #endif
 1143         } else if (adp->va_type == KD_EGA) {
 1144 #if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
 1145             rows_offset = 1;
 1146 #else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
 1147             if (video_mode_ptr == NULL) {
 1148                 rows_offset = 1;
 1149             } else {
 1150                 map_mode_table(mode_map, video_mode_ptr, M_ENH_C80x25 + 1);
 1151                 /* XXX how can one validate the EGA table... */
 1152                 mp = get_mode_param(adp->va_initial_mode);
 1153                 if (mp != NULL) {
 1154                     adp->va_flags |= V_ADP_MODECHANGE;
 1155 #ifndef VGA_NO_FONT_LOADING
 1156                     adp->va_flags |= V_ADP_FONT;
 1157 #endif
 1158                     rows_offset = 1;
 1159                 } else {
 1160                     /*
 1161                      * This is serious. We will not be able to switch video
 1162                      * modes at all...
 1163                      */
 1164                     video_mode_ptr = NULL;
 1165                     bzero(mode_map, sizeof(mode_map));
 1166                     rows_offset = 1;
 1167                 }
 1168             }
 1169 #endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
 1170         }
 1171     }
 1172 
 1173     /* remove conflicting modes if we have more than one adapter */
 1174     if (biosadapters > 0) {
 1175         for (i = 0; i < biosadapters; ++i) {
 1176             if (!(biosadapter[i].va_flags & V_ADP_MODECHANGE))
 1177                 continue;
 1178             clear_mode_map(&biosadapter[i], mode_map, M_VGA_CG320 + 1,
 1179                            (biosadapter[i].va_flags & V_ADP_COLOR) ? 
 1180                                V_INFO_COLOR : 0);
 1181             if ((biosadapter[i].va_type == KD_VGA)
 1182                 || (biosadapter[i].va_type == KD_EGA)) {
 1183                 biosadapter[i].va_io_base =
 1184                     (biosadapter[i].va_flags & V_ADP_COLOR) ?
 1185                         IO_VGA : IO_MDA;
 1186                 biosadapter[i].va_io_size = 32;
 1187             }
 1188         }
 1189     }
 1190 
 1191     /* buffer address */
 1192     vga_get_info(&biosadapter[V_ADP_PRIMARY],
 1193                  biosadapter[V_ADP_PRIMARY].va_initial_mode, &info);
 1194     info.vi_flags &= ~V_INFO_LINEAR; /* XXX */
 1195     update_adapter_info(&biosadapter[V_ADP_PRIMARY], &info);
 1196 
 1197     if (biosadapters > 1) {
 1198         vga_get_info(&biosadapter[V_ADP_SECONDARY],
 1199                      biosadapter[V_ADP_SECONDARY].va_initial_mode, &info);
 1200         info.vi_flags &= ~V_INFO_LINEAR; /* XXX */
 1201         update_adapter_info(&biosadapter[V_ADP_SECONDARY], &info);
 1202     }
 1203 
 1204     /*
 1205      * XXX: we should verify the following values for the primary adapter...
 1206      * crtc I/O port address: *(u_int16_t *)BIOS_PADDRTOVADDR(0x463);
 1207      * color/mono display: (*(u_int8_t *)BIOS_PADDRTOVADDR(0x487) & 0x02) 
 1208      *                     ? 0 : V_ADP_COLOR;
 1209      * columns: *(u_int8_t *)BIOS_PADDRTOVADDR(0x44a);
 1210      * rows: *(u_int8_t *)BIOS_PADDRTOVADDR(0x484);
 1211      * font size: *(u_int8_t *)BIOS_PADDRTOVADDR(0x485);
 1212      * buffer size: *(u_int16_t *)BIOS_PADDRTOVADDR(0x44c);
 1213      */
 1214 
 1215     return biosadapters;
 1216 }
 1217 
 1218 /* set the scan line length in pixel */
 1219 static int
 1220 set_line_length(video_adapter_t *adp, int pixel)
 1221 {
 1222     u_char *mp;
 1223     int ppw;    /* pixels per word */
 1224     int bpl;    /* bytes per line */
 1225     int count;
 1226 
 1227     if ((adp->va_type != KD_VGA) && (adp->va_type != KD_EGA))
 1228         return ENODEV;
 1229     mp = get_mode_param(adp->va_mode);
 1230     if (mp == NULL)
 1231         return EINVAL;
 1232 
 1233     switch (adp->va_info.vi_mem_model) {
 1234     case V_INFO_MM_PLANAR:
 1235         ppw = 16/(adp->va_info.vi_depth/adp->va_info.vi_planes);
 1236         count = (pixel + ppw - 1)/ppw/2;
 1237         bpl = ((pixel + ppw - 1)/ppw/2)*4;
 1238         break;
 1239     case V_INFO_MM_PACKED:
 1240         count = (pixel + 7)/8;
 1241         bpl = ((pixel + 7)/8)*8;
 1242         break;
 1243     case V_INFO_MM_TEXT:
 1244         count = (pixel + 7)/8;                  /* columns */
 1245         bpl = (pixel + 7)/8;                    /* columns */
 1246         break;
 1247     default:
 1248         return ENODEV;
 1249     }
 1250 
 1251     if (mp[10 + 0x17] & 0x40)                   /* CRTC mode control reg */
 1252         count *= 2;                             /* byte mode */
 1253     outb(adp->va_crtc_addr, 0x13);
 1254     outb(adp->va_crtc_addr + 1, count);
 1255     adp->va_line_width = bpl;
 1256 
 1257     return 0;
 1258 }
 1259 
 1260 static int
 1261 set_display_start(video_adapter_t *adp, int x, int y)
 1262 {
 1263     int off;    /* byte offset (graphics mode)/word offset (text mode) */
 1264     int poff;   /* pixel offset */
 1265     int roff;   /* row offset */
 1266     int ppb;    /* pixels per byte */
 1267 
 1268     if ((adp->va_type != KD_VGA) && (adp->va_type != KD_EGA))
 1269         x &= ~7;
 1270     if (adp->va_info.vi_flags & V_INFO_GRAPHICS) {
 1271         ppb = 8/(adp->va_info.vi_depth/adp->va_info.vi_planes);
 1272         off = y*adp->va_line_width + x/ppb;
 1273         roff = 0;
 1274         poff = x%ppb;
 1275     } else {
 1276         if ((adp->va_type == KD_VGA) || (adp->va_type == KD_EGA)) {
 1277             outb(TSIDX, 1);
 1278             if (inb(TSREG) & 1)
 1279                 ppb = 9;
 1280             else
 1281                 ppb = 8;
 1282         } else {
 1283             ppb = 8;
 1284         }
 1285         off = y/adp->va_info.vi_cheight*adp->va_line_width + x/ppb;
 1286         roff = y%adp->va_info.vi_cheight;
 1287         /* FIXME: is this correct? XXX */
 1288         if (ppb == 8)
 1289             poff = x%ppb;
 1290         else
 1291             poff = (x + 8)%ppb;
 1292     }
 1293 
 1294     /* start address */
 1295     outb(adp->va_crtc_addr, 0xc);               /* high */
 1296     outb(adp->va_crtc_addr + 1, off >> 8);
 1297     outb(adp->va_crtc_addr, 0xd);               /* low */
 1298     outb(adp->va_crtc_addr + 1, off & 0xff);
 1299 
 1300     /* horizontal pel pan */
 1301     if ((adp->va_type == KD_VGA) || (adp->va_type == KD_EGA)) {
 1302         inb(adp->va_crtc_addr + 6);
 1303         outb(ATC, 0x13 | 0x20);
 1304         outb(ATC, poff);
 1305         inb(adp->va_crtc_addr + 6);
 1306         outb(ATC, 0x20);
 1307     }
 1308 
 1309     /* preset raw scan */
 1310     outb(adp->va_crtc_addr, 8);
 1311     outb(adp->va_crtc_addr + 1, roff);
 1312 
 1313     adp->va_disp_start.x = x;
 1314     adp->va_disp_start.y = y;
 1315     return 0;
 1316 }
 1317 
 1318 #ifdef __i386__ /* XXX */
 1319 static void
 1320 fill(int val, void *d, size_t size)
 1321 {
 1322     u_char *p = d;
 1323 
 1324     while (size-- > 0)
 1325         *p++ = val;
 1326 }
 1327 #endif /* __i386__ */
 1328 
 1329 static void
 1330 filll_io(int val, vm_offset_t d, size_t size)
 1331 {
 1332     while (size-- > 0) {
 1333         writel(d, val);
 1334         d += sizeof(u_int32_t);
 1335     }
 1336 }
 1337 
 1338 /* entry points */
 1339 
 1340 #if 0
 1341 static int
 1342 vga_nop(void)
 1343 {
 1344     return 0;
 1345 }
 1346 #endif
 1347 
 1348 static int
 1349 vga_error(void)
 1350 {
 1351     return ENODEV;
 1352 }
 1353 
 1354 static int
 1355 vga_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
 1356 {
 1357     probe_adapters();
 1358     if (unit >= biosadapters)
 1359         return ENXIO;
 1360 
 1361     *adpp = &biosadapter[unit];
 1362 
 1363     return 0;
 1364 }
 1365 
 1366 static int
 1367 vga_init(int unit, video_adapter_t *adp, int flags)
 1368 {
 1369     if ((unit >= biosadapters) || (adp == NULL) || !probe_done(adp))
 1370         return ENXIO;
 1371 
 1372     if (!init_done(adp)) {
 1373         /* nothing to do really... */
 1374         adp->va_flags |= V_ADP_INITIALIZED;
 1375     }
 1376 
 1377     if (!config_done(adp)) {
 1378         if (vid_register(adp) < 0)
 1379                 return ENXIO;
 1380         adp->va_flags |= V_ADP_REGISTERED;
 1381     }
 1382     if (vga_sub_configure != NULL)
 1383         (*vga_sub_configure)(0);
 1384 
 1385     return 0;
 1386 }
 1387 
 1388 /*
 1389  * get_info():
 1390  * Return the video_info structure of the requested video mode.
 1391  *
 1392  * all adapters
 1393  */
 1394 static int
 1395 vga_get_info(video_adapter_t *adp, int mode, video_info_t *info)
 1396 {
 1397     int i;
 1398 
 1399     if (!vga_init_done)
 1400         return ENXIO;
 1401 
 1402     mode = map_gen_mode_num(adp->va_type, adp->va_flags & V_ADP_COLOR, mode);
 1403 #ifndef VGA_NO_MODE_CHANGE
 1404     if (adp->va_flags & V_ADP_MODECHANGE) {
 1405         /*
 1406          * If the parameter table entry for this mode is not found, 
 1407          * the mode is not supported...
 1408          */
 1409         if (get_mode_param(mode) == NULL)
 1410             return EINVAL;
 1411     } else
 1412 #endif /* VGA_NO_MODE_CHANGE */
 1413     {
 1414         /* 
 1415          * Even if we don't support video mode switching on this adapter,
 1416          * the information on the initial (thus current) video mode 
 1417          * should be made available.
 1418          */
 1419         if (mode != adp->va_initial_mode)
 1420             return EINVAL;
 1421     }
 1422 
 1423     for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
 1424         if (bios_vmode[i].vi_mode == NA)
 1425             continue;
 1426         if (mode == bios_vmode[i].vi_mode) {
 1427             *info = bios_vmode[i];
 1428             /* XXX */
 1429             info->vi_buffer_size = info->vi_window_size*info->vi_planes;
 1430             return 0;
 1431         }
 1432     }
 1433     return EINVAL;
 1434 }
 1435 
 1436 /*
 1437  * query_mode():
 1438  * Find a video mode matching the requested parameters.
 1439  * Fields filled with 0 are considered "don't care" fields and
 1440  * match any modes.
 1441  *
 1442  * all adapters
 1443  */
 1444 static int
 1445 vga_query_mode(video_adapter_t *adp, video_info_t *info)
 1446 {
 1447     int i;
 1448 
 1449     if (!vga_init_done)
 1450         return ENXIO;
 1451 
 1452     for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
 1453         if (bios_vmode[i].vi_mode == NA)
 1454             continue;
 1455 
 1456         if ((info->vi_width != 0)
 1457             && (info->vi_width != bios_vmode[i].vi_width))
 1458                 continue;
 1459         if ((info->vi_height != 0)
 1460             && (info->vi_height != bios_vmode[i].vi_height))
 1461                 continue;
 1462         if ((info->vi_cwidth != 0)
 1463             && (info->vi_cwidth != bios_vmode[i].vi_cwidth))
 1464                 continue;
 1465         if ((info->vi_cheight != 0)
 1466             && (info->vi_cheight != bios_vmode[i].vi_cheight))
 1467                 continue;
 1468         if ((info->vi_depth != 0)
 1469             && (info->vi_depth != bios_vmode[i].vi_depth))
 1470                 continue;
 1471         if ((info->vi_planes != 0)
 1472             && (info->vi_planes != bios_vmode[i].vi_planes))
 1473                 continue;
 1474         /* XXX: should check pixel format, memory model */
 1475         if ((info->vi_flags != 0)
 1476             && (info->vi_flags != bios_vmode[i].vi_flags))
 1477                 continue;
 1478 
 1479         /* verify if this mode is supported on this adapter */
 1480         if (vga_get_info(adp, bios_vmode[i].vi_mode, info))
 1481                 continue;
 1482         return 0;
 1483     }
 1484     return ENODEV;
 1485 }
 1486 
 1487 /*
 1488  * set_mode():
 1489  * Change the video mode.
 1490  *
 1491  * EGA/VGA
 1492  */
 1493 
 1494 #ifndef VGA_NO_MODE_CHANGE
 1495 #ifdef VGA_WIDTH90
 1496 static void
 1497 set_width90(adp_state_t *params)
 1498 {
 1499     /* 
 1500      * Based on code submitted by Kelly Yancey (kbyanc@freedomnet.com)
 1501      * and alexv@sui.gda.itesm.mx.
 1502      */
 1503     params->regs[5] |= 1;               /* toggle 8 pixel wide fonts */
 1504     params->regs[10+0x0] = 0x6b;
 1505     params->regs[10+0x1] = 0x59;
 1506     params->regs[10+0x2] = 0x5a;
 1507     params->regs[10+0x3] = 0x8e;
 1508     params->regs[10+0x4] = 0x5e;
 1509     params->regs[10+0x5] = 0x8a;
 1510     params->regs[10+0x13] = 45;
 1511     params->regs[35+0x13] = 0;
 1512 }
 1513 #endif /* VGA_WIDTH90 */
 1514 #endif /* !VGA_NO_MODE_CHANGE */
 1515 
 1516 static int
 1517 vga_set_mode(video_adapter_t *adp, int mode)
 1518 {
 1519 #ifndef VGA_NO_MODE_CHANGE
 1520     video_info_t info;
 1521     adp_state_t params;
 1522 
 1523     prologue(adp, V_ADP_MODECHANGE, ENODEV);
 1524 
 1525     mode = map_gen_mode_num(adp->va_type, 
 1526                             adp->va_flags & V_ADP_COLOR, mode);
 1527     if (vga_get_info(adp, mode, &info))
 1528         return EINVAL;
 1529 
 1530 #if VGA_DEBUG > 1
 1531     printf("vga_set_mode(): setting mode %d\n", mode);
 1532 #endif
 1533 
 1534     params.sig = V_STATE_SIG;
 1535     bcopy(get_mode_param(mode), params.regs, sizeof(params.regs));
 1536 
 1537     switch (mode) {
 1538 #ifdef VGA_WIDTH90
 1539     case M_VGA_C90x60: case M_VGA_M90x60:
 1540         set_width90(&params);
 1541         /* FALL THROUGH */
 1542 #endif
 1543     case M_VGA_C80x60: case M_VGA_M80x60:
 1544         params.regs[2]  = 0x08;
 1545         params.regs[19] = 0x47;
 1546         goto special_480l;
 1547 
 1548 #ifdef VGA_WIDTH90
 1549     case M_VGA_C90x30: case M_VGA_M90x30:
 1550         set_width90(&params);
 1551         /* FALL THROUGH */
 1552 #endif
 1553     case M_VGA_C80x30: case M_VGA_M80x30:
 1554         params.regs[19] = 0x4f;
 1555 special_480l:
 1556         params.regs[9] |= 0xc0;
 1557         params.regs[16] = 0x08;
 1558         params.regs[17] = 0x3e;
 1559         params.regs[26] = 0xea;
 1560         params.regs[28] = 0xdf;
 1561         params.regs[31] = 0xe7;
 1562         params.regs[32] = 0x04;
 1563         goto setup_mode;
 1564 
 1565 #ifdef VGA_WIDTH90
 1566     case M_VGA_C90x43: case M_VGA_M90x43:
 1567         set_width90(&params);
 1568         /* FALL THROUGH */
 1569 #endif
 1570     case M_ENH_C80x43: case M_ENH_B80x43:
 1571         params.regs[28] = 87;
 1572         goto special_80x50;
 1573 
 1574 #ifdef VGA_WIDTH90
 1575     case M_VGA_C90x50: case M_VGA_M90x50:
 1576         set_width90(&params);
 1577         /* FALL THROUGH */
 1578 #endif
 1579     case M_VGA_C80x50: case M_VGA_M80x50:
 1580 special_80x50:
 1581         params.regs[2] = 8;
 1582         params.regs[19] = 7;
 1583         goto setup_mode;
 1584 
 1585 #ifdef VGA_WIDTH90
 1586     case M_VGA_C90x25: case M_VGA_M90x25:
 1587         set_width90(&params);
 1588         /* FALL THROUGH */
 1589 #endif
 1590     case M_VGA_C40x25: case M_VGA_C80x25:
 1591     case M_VGA_M80x25:
 1592     case M_B40x25:     case M_C40x25:
 1593     case M_B80x25:     case M_C80x25:
 1594     case M_ENH_B40x25: case M_ENH_C40x25:
 1595     case M_ENH_B80x25: case M_ENH_C80x25:
 1596     case M_EGAMONO80x25:
 1597 
 1598 setup_mode:
 1599         vga_load_state(adp, &params);
 1600         break;
 1601 
 1602     case M_VGA_MODEX:
 1603         /* "unchain" the VGA mode */
 1604         params.regs[5-1+0x04] &= 0xf7;
 1605         params.regs[5-1+0x04] |= 0x04;
 1606         /* turn off doubleword mode */
 1607         params.regs[10+0x14] &= 0xbf;
 1608         /* turn off word adressing */
 1609         params.regs[10+0x17] |= 0x40;
 1610         /* set logical screen width */
 1611         params.regs[10+0x13] = 80;
 1612         /* set 240 lines */
 1613         params.regs[10+0x11] = 0x2c;
 1614         params.regs[10+0x06] = 0x0d;
 1615         params.regs[10+0x07] = 0x3e;
 1616         params.regs[10+0x10] = 0xea;
 1617         params.regs[10+0x11] = 0xac;
 1618         params.regs[10+0x12] = 0xdf;
 1619         params.regs[10+0x15] = 0xe7;
 1620         params.regs[10+0x16] = 0x06;
 1621         /* set vertical sync polarity to reflect aspect ratio */
 1622         params.regs[9] = 0xe3;
 1623         goto setup_grmode;
 1624 
 1625     case M_BG320:     case M_CG320:     case M_BG640:
 1626     case M_CG320_D:   case M_CG640_E:
 1627     case M_CG640x350: case M_ENH_CG640:
 1628     case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
 1629 
 1630 setup_grmode:
 1631         vga_load_state(adp, &params);
 1632         break;
 1633 
 1634     default:
 1635         return EINVAL;
 1636     }
 1637 
 1638     adp->va_mode = mode;
 1639     info.vi_flags &= ~V_INFO_LINEAR; /* XXX */
 1640     update_adapter_info(adp, &info);
 1641 
 1642     /* move hardware cursor out of the way */
 1643     (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
 1644 
 1645     return 0;
 1646 #else /* VGA_NO_MODE_CHANGE */
 1647     return ENODEV;
 1648 #endif /* VGA_NO_MODE_CHANGE */
 1649 }
 1650 
 1651 #ifndef VGA_NO_FONT_LOADING
 1652 
 1653 static void
 1654 set_font_mode(video_adapter_t *adp, u_char *buf)
 1655 {
 1656     u_char *mp;
 1657     int s;
 1658 
 1659     s = splhigh();
 1660 
 1661     /* save register values */
 1662     if (adp->va_type == KD_VGA) {
 1663         outb(TSIDX, 0x02); buf[0] = inb(TSREG);
 1664         outb(TSIDX, 0x04); buf[1] = inb(TSREG);
 1665         outb(GDCIDX, 0x04); buf[2] = inb(GDCREG);
 1666         outb(GDCIDX, 0x05); buf[3] = inb(GDCREG);
 1667         outb(GDCIDX, 0x06); buf[4] = inb(GDCREG);
 1668         inb(adp->va_crtc_addr + 6);
 1669         outb(ATC, 0x10); buf[5] = inb(ATC + 1);
 1670     } else /* if (adp->va_type == KD_EGA) */ {
 1671         /* 
 1672          * EGA cannot be read; copy parameters from the mode parameter 
 1673          * table. 
 1674          */
 1675         mp = get_mode_param(adp->va_mode);
 1676         buf[0] = mp[5 + 0x02 - 1];
 1677         buf[1] = mp[5 + 0x04 - 1];
 1678         buf[2] = mp[55 + 0x04];
 1679         buf[3] = mp[55 + 0x05];
 1680         buf[4] = mp[55 + 0x06];
 1681         buf[5] = mp[35 + 0x10];
 1682     }
 1683 
 1684     /* setup vga for loading fonts */
 1685     inb(adp->va_crtc_addr + 6);                 /* reset flip-flop */
 1686     outb(ATC, 0x10); outb(ATC, buf[5] & ~0x01);
 1687     inb(adp->va_crtc_addr + 6);                 /* reset flip-flop */
 1688     outb(ATC, 0x20);                            /* enable palette */
 1689 
 1690 #if VGA_SLOW_IOACCESS
 1691 #ifdef VGA_ALT_SEQACCESS
 1692     outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1693 #endif
 1694     outb(TSIDX, 0x02); outb(TSREG, 0x04);
 1695     outb(TSIDX, 0x04); outb(TSREG, 0x07);
 1696 #ifdef VGA_ALT_SEQACCESS
 1697     outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1698 #endif
 1699     outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
 1700     outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
 1701     outb(GDCIDX, 0x06); outb(GDCREG, 0x04);
 1702 #else /* VGA_SLOW_IOACCESS */
 1703 #ifdef VGA_ALT_SEQACCESS
 1704     outw(TSIDX, 0x0100);
 1705 #endif
 1706     outw(TSIDX, 0x0402);
 1707     outw(TSIDX, 0x0704);
 1708 #ifdef VGA_ALT_SEQACCESS
 1709     outw(TSIDX, 0x0300);
 1710 #endif
 1711     outw(GDCIDX, 0x0204);
 1712     outw(GDCIDX, 0x0005);
 1713     outw(GDCIDX, 0x0406);               /* addr = a0000, 64kb */
 1714 #endif /* VGA_SLOW_IOACCESS */
 1715 
 1716     splx(s);
 1717 }
 1718 
 1719 static void
 1720 set_normal_mode(video_adapter_t *adp, u_char *buf)
 1721 {
 1722     int s;
 1723 
 1724     s = splhigh();
 1725 
 1726     /* setup vga for normal operation mode again */
 1727     inb(adp->va_crtc_addr + 6);                 /* reset flip-flop */
 1728     outb(ATC, 0x10); outb(ATC, buf[5]);
 1729     inb(adp->va_crtc_addr + 6);                 /* reset flip-flop */
 1730     outb(ATC, 0x20);                            /* enable palette */
 1731 
 1732 #if VGA_SLOW_IOACCESS
 1733 #ifdef VGA_ALT_SEQACCESS
 1734     outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1735 #endif
 1736     outb(TSIDX, 0x02); outb(TSREG, buf[0]);
 1737     outb(TSIDX, 0x04); outb(TSREG, buf[1]);
 1738 #ifdef VGA_ALT_SEQACCESS
 1739     outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1740 #endif
 1741     outb(GDCIDX, 0x04); outb(GDCREG, buf[2]);
 1742     outb(GDCIDX, 0x05); outb(GDCREG, buf[3]);
 1743     if (adp->va_crtc_addr == MONO_CRTC) {
 1744         outb(GDCIDX, 0x06); outb(GDCREG,(buf[4] & 0x03) | 0x08);
 1745     } else {
 1746         outb(GDCIDX, 0x06); outb(GDCREG,(buf[4] & 0x03) | 0x0c);
 1747     }
 1748 #else /* VGA_SLOW_IOACCESS */
 1749 #ifdef VGA_ALT_SEQACCESS
 1750     outw(TSIDX, 0x0100);
 1751 #endif
 1752     outw(TSIDX, 0x0002 | (buf[0] << 8));
 1753     outw(TSIDX, 0x0004 | (buf[1] << 8));
 1754 #ifdef VGA_ALT_SEQACCESS
 1755     outw(TSIDX, 0x0300);
 1756 #endif
 1757     outw(GDCIDX, 0x0004 | (buf[2] << 8));
 1758     outw(GDCIDX, 0x0005 | (buf[3] << 8));
 1759     if (adp->va_crtc_addr == MONO_CRTC)
 1760         outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x08)<<8));
 1761     else
 1762         outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x0c)<<8));
 1763 #endif /* VGA_SLOW_IOACCESS */
 1764 
 1765     splx(s);
 1766 }
 1767 
 1768 #endif /* VGA_NO_FONT_LOADING */
 1769 
 1770 /*
 1771  * save_font():
 1772  * Read the font data in the requested font page from the video adapter.
 1773  *
 1774  * EGA/VGA
 1775  */
 1776 static int
 1777 vga_save_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
 1778               int ch, int count)
 1779 {
 1780 #ifndef VGA_NO_FONT_LOADING
 1781     u_char buf[PARAM_BUFSIZE];
 1782     u_int32_t segment;
 1783     int c;
 1784 #ifdef VGA_ALT_SEQACCESS
 1785     int s;
 1786     u_char val = 0;
 1787 #endif
 1788 
 1789     prologue(adp, V_ADP_FONT, ENODEV);
 1790 
 1791     if (fontsize < 14) {
 1792         /* FONT_8 */
 1793         fontsize = 8;
 1794     } else if (fontsize >= 32) {
 1795         fontsize = 32;
 1796     } else if (fontsize >= 16) {
 1797         /* FONT_16 */
 1798         fontsize = 16;
 1799     } else {
 1800         /* FONT_14 */
 1801         fontsize = 14;
 1802     }
 1803 
 1804     if (page < 0 || page >= 8)
 1805         return EINVAL;
 1806     segment = FONT_BUF + 0x4000*page;
 1807     if (page > 3)
 1808         segment -= 0xe000;
 1809 
 1810 #ifdef VGA_ALT_SEQACCESS
 1811     if (adp->va_type == KD_VGA) {       /* what about EGA? XXX */
 1812         s = splhigh();
 1813         outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1814         outb(TSIDX, 0x01); val = inb(TSREG);    /* disable screen */
 1815         outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
 1816         outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1817         splx(s);
 1818     }
 1819 #endif
 1820 
 1821     set_font_mode(adp, buf);
 1822     if (fontsize == 32) {
 1823         bcopy_fromio(segment + ch*32, data, fontsize*count);
 1824     } else {
 1825         for (c = ch; count > 0; ++c, --count) {
 1826             bcopy_fromio(segment + c*32, data, fontsize);
 1827             data += fontsize;
 1828         }
 1829     }
 1830     set_normal_mode(adp, buf);
 1831 
 1832 #ifdef VGA_ALT_SEQACCESS
 1833     if (adp->va_type == KD_VGA) {
 1834         s = splhigh();
 1835         outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1836         outb(TSIDX, 0x01); outb(TSREG, val & 0xdf);     /* enable screen */
 1837         outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1838         splx(s);
 1839     }
 1840 #endif
 1841 
 1842     return 0;
 1843 #else /* VGA_NO_FONT_LOADING */
 1844     return ENODEV;
 1845 #endif /* VGA_NO_FONT_LOADING */
 1846 }
 1847 
 1848 /*
 1849  * load_font():
 1850  * Set the font data in the requested font page.
 1851  * NOTE: it appears that some recent video adapters do not support
 1852  * the font page other than 0... XXX
 1853  *
 1854  * EGA/VGA
 1855  */
 1856 static int
 1857 vga_load_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
 1858               int ch, int count)
 1859 {
 1860 #ifndef VGA_NO_FONT_LOADING
 1861     u_char buf[PARAM_BUFSIZE];
 1862     u_int32_t segment;
 1863     int c;
 1864 #ifdef VGA_ALT_SEQACCESS
 1865     int s;
 1866     u_char val = 0;
 1867 #endif
 1868 
 1869     prologue(adp, V_ADP_FONT, ENODEV);
 1870 
 1871     if (fontsize < 14) {
 1872         /* FONT_8 */
 1873         fontsize = 8;
 1874     } else if (fontsize >= 32) {
 1875         fontsize = 32;
 1876     } else if (fontsize >= 16) {
 1877         /* FONT_16 */
 1878         fontsize = 16;
 1879     } else {
 1880         /* FONT_14 */
 1881         fontsize = 14;
 1882     }
 1883 
 1884     if (page < 0 || page >= 8)
 1885         return EINVAL;
 1886     segment = FONT_BUF + 0x4000*page;
 1887     if (page > 3)
 1888         segment -= 0xe000;
 1889 
 1890 #ifdef VGA_ALT_SEQACCESS
 1891     if (adp->va_type == KD_VGA) {       /* what about EGA? XXX */
 1892         s = splhigh();
 1893         outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1894         outb(TSIDX, 0x01); val = inb(TSREG);    /* disable screen */
 1895         outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
 1896         outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1897         splx(s);
 1898     }
 1899 #endif
 1900 
 1901     set_font_mode(adp, buf);
 1902     if (fontsize == 32) {
 1903         bcopy_toio(data, segment + ch*32, fontsize*count);
 1904     } else {
 1905         for (c = ch; count > 0; ++c, --count) {
 1906             bcopy_toio(data, segment + c*32, fontsize);
 1907             data += fontsize;
 1908         }
 1909     }
 1910     set_normal_mode(adp, buf);
 1911 
 1912 #ifdef VGA_ALT_SEQACCESS
 1913     if (adp->va_type == KD_VGA) {
 1914         s = splhigh();
 1915         outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1916         outb(TSIDX, 0x01); outb(TSREG, val & 0xdf);     /* enable screen */
 1917         outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1918         splx(s);
 1919     }
 1920 #endif
 1921 
 1922     return 0;
 1923 #else /* VGA_NO_FONT_LOADING */
 1924     return ENODEV;
 1925 #endif /* VGA_NO_FONT_LOADING */
 1926 }
 1927 
 1928 /*
 1929  * show_font():
 1930  * Activate the requested font page.
 1931  * NOTE: it appears that some recent video adapters do not support
 1932  * the font page other than 0... XXX
 1933  *
 1934  * EGA/VGA
 1935  */
 1936 static int
 1937 vga_show_font(video_adapter_t *adp, int page)
 1938 {
 1939 #ifndef VGA_NO_FONT_LOADING
 1940     static u_char cg[] = { 0x00, 0x05, 0x0a, 0x0f, 0x30, 0x35, 0x3a, 0x3f };
 1941     int s;
 1942 
 1943     prologue(adp, V_ADP_FONT, ENODEV);
 1944     if (page < 0 || page >= 8)
 1945         return EINVAL;
 1946 
 1947     s = splhigh();
 1948     outb(TSIDX, 0x03); outb(TSREG, cg[page]);
 1949     splx(s);
 1950 
 1951     return 0;
 1952 #else /* VGA_NO_FONT_LOADING */
 1953     return ENODEV;
 1954 #endif /* VGA_NO_FONT_LOADING */
 1955 }
 1956 
 1957 /*
 1958  * save_palette():
 1959  * Read DAC values. The values have expressed in 8 bits.
 1960  *
 1961  * VGA
 1962  */
 1963 static int
 1964 vga_save_palette(video_adapter_t *adp, u_char *palette)
 1965 {
 1966     int i;
 1967 
 1968     prologue(adp, V_ADP_PALETTE, ENODEV);
 1969 
 1970     /* 
 1971      * We store 8 bit values in the palette buffer, while the standard
 1972      * VGA has 6 bit DAC .
 1973      */
 1974     outb(PALRADR, 0x00);
 1975     for (i = 0; i < 256*3; ++i)
 1976         palette[i] = inb(PALDATA) << 2; 
 1977     inb(adp->va_crtc_addr + 6); /* reset flip/flop */
 1978     return 0;
 1979 }
 1980 
 1981 static int
 1982 vga_save_palette2(video_adapter_t *adp, int base, int count,
 1983                   u_char *r, u_char *g, u_char *b)
 1984 {
 1985     int i;
 1986 
 1987     prologue(adp, V_ADP_PALETTE, ENODEV);
 1988 
 1989     outb(PALRADR, base);
 1990     for (i = 0; i < count; ++i) {
 1991         r[i] = inb(PALDATA) << 2; 
 1992         g[i] = inb(PALDATA) << 2; 
 1993         b[i] = inb(PALDATA) << 2; 
 1994     }
 1995     inb(adp->va_crtc_addr + 6);         /* reset flip/flop */
 1996     return 0;
 1997 }
 1998 
 1999 /*
 2000  * load_palette():
 2001  * Set DAC values.
 2002  *
 2003  * VGA
 2004  */
 2005 static int
 2006 vga_load_palette(video_adapter_t *adp, u_char *palette)
 2007 {
 2008     int i;
 2009 
 2010     prologue(adp, V_ADP_PALETTE, ENODEV);
 2011 
 2012     outb(PIXMASK, 0xff);                /* no pixelmask */
 2013     outb(PALWADR, 0x00);
 2014     for (i = 0; i < 256*3; ++i)
 2015         outb(PALDATA, palette[i] >> 2);
 2016     inb(adp->va_crtc_addr + 6); /* reset flip/flop */
 2017     outb(ATC, 0x20);                    /* enable palette */
 2018     return 0;
 2019 }
 2020 
 2021 static int
 2022 vga_load_palette2(video_adapter_t *adp, int base, int count,
 2023                   u_char *r, u_char *g, u_char *b)
 2024 {
 2025     int i;
 2026 
 2027     prologue(adp, V_ADP_PALETTE, ENODEV);
 2028 
 2029     outb(PIXMASK, 0xff);                /* no pixelmask */
 2030     outb(PALWADR, base);
 2031     for (i = 0; i < count; ++i) {
 2032         outb(PALDATA, r[i] >> 2);
 2033         outb(PALDATA, g[i] >> 2);
 2034         outb(PALDATA, b[i] >> 2);
 2035     }
 2036     inb(adp->va_crtc_addr + 6);         /* reset flip/flop */
 2037     outb(ATC, 0x20);                    /* enable palette */
 2038     return 0;
 2039 }
 2040 
 2041 /*
 2042  * set_border():
 2043  * Change the border color.
 2044  *
 2045  * CGA/EGA/VGA
 2046  */
 2047 static int
 2048 vga_set_border(video_adapter_t *adp, int color)
 2049 {
 2050     prologue(adp, V_ADP_BORDER, ENODEV);
 2051 
 2052     switch (adp->va_type) {
 2053     case KD_EGA:
 2054     case KD_VGA:    
 2055         inb(adp->va_crtc_addr + 6);     /* reset flip-flop */
 2056         outb(ATC, 0x31); outb(ATC, color & 0xff); 
 2057         break;  
 2058     case KD_CGA:    
 2059         outb(adp->va_crtc_addr + 5, color & 0x0f); /* color select register */
 2060         break;  
 2061     case KD_MONO:   
 2062     case KD_HERCULES:
 2063     default:
 2064         break;  
 2065     }
 2066     return 0;
 2067 }
 2068 
 2069 /*
 2070  * save_state():
 2071  * Read video register values.
 2072  * NOTE: this function only reads the standard EGA/VGA registers.
 2073  * any extra/extended registers of SVGA adapters are not saved.
 2074  *
 2075  * VGA
 2076  */
 2077 static int
 2078 vga_save_state(video_adapter_t *adp, void *p, size_t size)
 2079 {
 2080     video_info_t info;
 2081     u_char *buf;
 2082     int crtc_addr;
 2083     int i, j;
 2084     int s;
 2085 
 2086     if (size == 0) {
 2087         /* return the required buffer size */
 2088         prologue(adp, V_ADP_STATESAVE, 0);
 2089         return sizeof(adp_state_t);
 2090     } else {
 2091         prologue(adp, V_ADP_STATESAVE, ENODEV);
 2092         if (size < sizeof(adp_state_t))
 2093             return EINVAL;
 2094     }
 2095 
 2096     ((adp_state_t *)p)->sig = V_STATE_SIG;
 2097     buf = ((adp_state_t *)p)->regs;
 2098     bzero(buf, V_MODE_PARAM_SIZE);
 2099     crtc_addr = adp->va_crtc_addr;
 2100 
 2101     s = splhigh();
 2102 
 2103     outb(TSIDX, 0x00); outb(TSREG, 0x01);       /* stop sequencer */
 2104     for (i = 0, j = 5; i < 4; i++) {           
 2105         outb(TSIDX, i + 1);
 2106         buf[j++]  =  inb(TSREG);
 2107     }
 2108     buf[9]  =  inb(MISC + 10);                  /* dot-clock */
 2109     outb(TSIDX, 0x00); outb(TSREG, 0x03);       /* start sequencer */
 2110 
 2111     for (i = 0, j = 10; i < 25; i++) {          /* crtc */
 2112         outb(crtc_addr, i);
 2113         buf[j++]  =  inb(crtc_addr + 1);
 2114     }
 2115     for (i = 0, j = 35; i < 20; i++) {          /* attribute ctrl */
 2116         inb(crtc_addr + 6);                     /* reset flip-flop */
 2117         outb(ATC, i);
 2118         buf[j++]  =  inb(ATC + 1);
 2119     }
 2120     for (i = 0, j = 55; i < 9; i++) {           /* graph data ctrl */
 2121         outb(GDCIDX, i);
 2122         buf[j++]  =  inb(GDCREG);
 2123     }
 2124     inb(crtc_addr + 6);                         /* reset flip-flop */
 2125     outb(ATC, 0x20);                            /* enable palette */
 2126 
 2127     splx(s);
 2128 
 2129 #if 1
 2130     if (vga_get_info(adp, adp->va_mode, &info) == 0) {
 2131         if (info.vi_flags & V_INFO_GRAPHICS) {
 2132             buf[0] = info.vi_width/info.vi_cwidth; /* COLS */
 2133             buf[1] = info.vi_height/info.vi_cheight - 1; /* ROWS */
 2134         } else {
 2135             buf[0] = info.vi_width;             /* COLS */
 2136             buf[1] = info.vi_height - 1;        /* ROWS */
 2137         }
 2138         buf[2] = info.vi_cheight;               /* POINTS */
 2139     } else {
 2140         /* XXX: shouldn't be happening... */
 2141         printf("vga%d: %s: failed to obtain mode info. (vga_save_state())\n",
 2142                adp->va_unit, adp->va_name);
 2143     }
 2144 #else
 2145     buf[0] = readb(BIOS_PADDRTOVADDR(0x44a));   /* COLS */
 2146     buf[1] = readb(BIOS_PADDRTOVADDR(0x484));   /* ROWS */
 2147     buf[2] = readb(BIOS_PADDRTOVADDR(0x485));   /* POINTS */
 2148     buf[3] = readb(BIOS_PADDRTOVADDR(0x44c));
 2149     buf[4] = readb(BIOS_PADDRTOVADDR(0x44d));
 2150 #endif
 2151 
 2152     return 0;
 2153 }
 2154 
 2155 /*
 2156  * load_state():
 2157  * Set video registers at once.
 2158  * NOTE: this function only updates the standard EGA/VGA registers.
 2159  * any extra/extended registers of SVGA adapters are not changed.
 2160  *
 2161  * EGA/VGA
 2162  */
 2163 static int
 2164 vga_load_state(video_adapter_t *adp, void *p)
 2165 {
 2166     u_char *buf;
 2167     int crtc_addr;
 2168     int s;
 2169     int i;
 2170 
 2171     prologue(adp, V_ADP_STATELOAD, ENODEV);
 2172     if (((adp_state_t *)p)->sig != V_STATE_SIG)
 2173         return EINVAL;
 2174 
 2175     buf = ((adp_state_t *)p)->regs;
 2176     crtc_addr = adp->va_crtc_addr;
 2177 
 2178 #if VGA_DEBUG > 1
 2179     dump_buffer(buf, V_MODE_PARAM_SIZE);
 2180 #endif
 2181 
 2182     s = splhigh();
 2183 
 2184     outb(TSIDX, 0x00); outb(TSREG, 0x01);       /* stop sequencer */
 2185     for (i = 0; i < 4; ++i) {                   /* program sequencer */
 2186         outb(TSIDX, i + 1);
 2187         outb(TSREG, buf[i + 5]);
 2188     }
 2189     outb(MISC, buf[9]);                         /* set dot-clock */
 2190     outb(TSIDX, 0x00); outb(TSREG, 0x03);       /* start sequencer */
 2191     outb(crtc_addr, 0x11);
 2192     outb(crtc_addr + 1, inb(crtc_addr + 1) & 0x7F);
 2193     for (i = 0; i < 25; ++i) {                  /* program crtc */
 2194         outb(crtc_addr, i);
 2195         outb(crtc_addr + 1, buf[i + 10]);
 2196     }
 2197     inb(crtc_addr+6);                           /* reset flip-flop */
 2198     for (i = 0; i < 20; ++i) {                  /* program attribute ctrl */
 2199         outb(ATC, i);
 2200         outb(ATC, buf[i + 35]);
 2201     }
 2202     for (i = 0; i < 9; ++i) {                   /* program graph data ctrl */
 2203         outb(GDCIDX, i);
 2204         outb(GDCREG, buf[i + 55]);
 2205     }
 2206     inb(crtc_addr + 6);                         /* reset flip-flop */
 2207     outb(ATC, 0x20);                            /* enable palette */
 2208 
 2209 #if notyet /* a temporary workaround for kernel panic, XXX */
 2210 #ifndef VGA_NO_BIOS
 2211     if (adp->va_unit == V_ADP_PRIMARY) {
 2212         writeb(BIOS_PADDRTOVADDR(0x44a), buf[0]);       /* COLS */
 2213         writeb(BIOS_PADDRTOVADDR(0x484), buf[1] + rows_offset - 1); /* ROWS */
 2214         writeb(BIOS_PADDRTOVADDR(0x485), buf[2]);       /* POINTS */
 2215 #if 0
 2216         writeb(BIOS_PADDRTOVADDR(0x44c), buf[3]);
 2217         writeb(BIOS_PADDRTOVADDR(0x44d), buf[4]);
 2218 #endif
 2219     }
 2220 #endif /* VGA_NO_BIOS */
 2221 #endif /* notyet */
 2222 
 2223     splx(s);
 2224     return 0;
 2225 }
 2226 
 2227 /*
 2228  * set_origin():
 2229  * Change the origin (window mapping) of the banked frame buffer.
 2230  */
 2231 static int
 2232 vga_set_origin(video_adapter_t *adp, off_t offset)
 2233 {
 2234     /* 
 2235      * The standard video modes do not require window mapping; 
 2236      * always return error.
 2237      */
 2238     return ENODEV;
 2239 }
 2240 
 2241 /*
 2242  * read_hw_cursor():
 2243  * Read the position of the hardware text cursor.
 2244  *
 2245  * all adapters
 2246  */
 2247 static int
 2248 vga_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
 2249 {
 2250     u_int16_t off;
 2251     int s;
 2252 
 2253     if (!vga_init_done)
 2254         return ENXIO;
 2255 
 2256     if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
 2257         return ENODEV;
 2258 
 2259     s = spltty();
 2260     outb(adp->va_crtc_addr, 14);
 2261     off = inb(adp->va_crtc_addr + 1);
 2262     outb(adp->va_crtc_addr, 15);
 2263     off = (off << 8) | inb(adp->va_crtc_addr + 1);
 2264     splx(s);
 2265 
 2266     *row = off / adp->va_info.vi_width;
 2267     *col = off % adp->va_info.vi_width;
 2268 
 2269     return 0;
 2270 }
 2271 
 2272 /*
 2273  * set_hw_cursor():
 2274  * Move the hardware text cursor.  If col and row are both -1, 
 2275  * the cursor won't be shown.
 2276  *
 2277  * all adapters
 2278  */
 2279 static int
 2280 vga_set_hw_cursor(video_adapter_t *adp, int col, int row)
 2281 {
 2282     u_int16_t off;
 2283     int s;
 2284 
 2285     if (!vga_init_done)
 2286         return ENXIO;
 2287 
 2288     if ((col == -1) && (row == -1)) {
 2289         off = -1;
 2290     } else {
 2291         if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
 2292             return ENODEV;
 2293         off = row*adp->va_info.vi_width + col;
 2294     }
 2295 
 2296     s = spltty();
 2297     outb(adp->va_crtc_addr, 14);
 2298     outb(adp->va_crtc_addr + 1, off >> 8);
 2299     outb(adp->va_crtc_addr, 15);
 2300     outb(adp->va_crtc_addr + 1, off & 0x00ff);
 2301     splx(s);
 2302 
 2303     return 0;
 2304 }
 2305 
 2306 /*
 2307  * set_hw_cursor_shape():
 2308  * Change the shape of the hardware text cursor. If the height is
 2309  * zero or negative, the cursor won't be shown.
 2310  *
 2311  * all adapters
 2312  */
 2313 static int
 2314 vga_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
 2315                         int celsize, int blink)
 2316 {
 2317     int s;
 2318 
 2319     if (!vga_init_done)
 2320         return ENXIO;
 2321 
 2322     s = spltty();
 2323     switch (adp->va_type) {
 2324     case KD_VGA:
 2325     case KD_CGA:
 2326     case KD_MONO:
 2327     case KD_HERCULES:
 2328     default:
 2329         if (height <= 0) {
 2330             /* make the cursor invisible */
 2331             outb(adp->va_crtc_addr, 10);
 2332             outb(adp->va_crtc_addr + 1, 32);
 2333             outb(adp->va_crtc_addr, 11);
 2334             outb(adp->va_crtc_addr + 1, 0);
 2335         } else {
 2336             outb(adp->va_crtc_addr, 10);
 2337             outb(adp->va_crtc_addr + 1, celsize - base - height);
 2338             outb(adp->va_crtc_addr, 11);
 2339             outb(adp->va_crtc_addr + 1, celsize - base - 1);
 2340         }
 2341         break;
 2342     case KD_EGA:
 2343         if (height <= 0) {
 2344             /* make the cursor invisible */
 2345             outb(adp->va_crtc_addr, 10);
 2346             outb(adp->va_crtc_addr + 1, celsize);
 2347             outb(adp->va_crtc_addr, 11);
 2348             outb(adp->va_crtc_addr + 1, 0);
 2349         } else {
 2350             outb(adp->va_crtc_addr, 10);
 2351             outb(adp->va_crtc_addr + 1, celsize - base - height);
 2352             outb(adp->va_crtc_addr, 11);
 2353             outb(adp->va_crtc_addr + 1, celsize - base);
 2354         }
 2355         break;
 2356     }
 2357     splx(s);
 2358 
 2359     return 0;
 2360 }
 2361 
 2362 /*
 2363  * blank_display()
 2364  * Put the display in power save/power off mode.
 2365  *
 2366  * all adapters
 2367  */
 2368 static int
 2369 vga_blank_display(video_adapter_t *adp, int mode)
 2370 {
 2371     u_char val;
 2372     int s;
 2373 
 2374     s = splhigh();
 2375     switch (adp->va_type) {
 2376     case KD_VGA:
 2377         switch (mode) {
 2378         case V_DISPLAY_SUSPEND:
 2379         case V_DISPLAY_STAND_BY:
 2380             outb(TSIDX, 0x01);
 2381             val = inb(TSREG);
 2382             outb(TSIDX, 0x01);
 2383             outb(TSREG, val | 0x20);
 2384             outb(adp->va_crtc_addr, 0x17);
 2385             val = inb(adp->va_crtc_addr + 1);
 2386             outb(adp->va_crtc_addr + 1, val & ~0x80);
 2387             break;
 2388         case V_DISPLAY_BLANK:
 2389             outb(TSIDX, 0x01);
 2390             val = inb(TSREG);
 2391             outb(TSIDX, 0x01);
 2392             outb(TSREG, val | 0x20);
 2393             break;
 2394         case V_DISPLAY_ON:
 2395             outb(TSIDX, 0x01);
 2396             val = inb(TSREG);
 2397             outb(TSIDX, 0x01);
 2398             outb(TSREG, val & 0xDF);
 2399             outb(adp->va_crtc_addr, 0x17);
 2400             val = inb(adp->va_crtc_addr + 1);
 2401             outb(adp->va_crtc_addr + 1, val | 0x80);
 2402             break;
 2403         }
 2404         break;
 2405 
 2406     case KD_EGA:
 2407         /* no support yet */
 2408         splx(s);
 2409         return ENODEV;
 2410 
 2411     case KD_CGA:
 2412         switch (mode) {
 2413         case V_DISPLAY_SUSPEND:
 2414         case V_DISPLAY_STAND_BY:
 2415         case V_DISPLAY_BLANK:
 2416             outb(adp->va_crtc_addr + 4, 0x25);
 2417             break;
 2418         case V_DISPLAY_ON:
 2419             outb(adp->va_crtc_addr + 4, 0x2d);
 2420             break;
 2421         }
 2422         break;
 2423 
 2424     case KD_MONO:
 2425     case KD_HERCULES:
 2426         switch (mode) {
 2427         case V_DISPLAY_SUSPEND:
 2428         case V_DISPLAY_STAND_BY:
 2429         case V_DISPLAY_BLANK:
 2430             outb(adp->va_crtc_addr + 4, 0x21);
 2431             break;
 2432         case V_DISPLAY_ON:
 2433             outb(adp->va_crtc_addr + 4, 0x29);
 2434             break;
 2435         }
 2436         break;
 2437     default:
 2438         break;
 2439     }
 2440     splx(s);
 2441 
 2442     return 0;
 2443 }
 2444 
 2445 /*
 2446  * mmap():
 2447  * Mmap frame buffer.
 2448  *
 2449  * all adapters
 2450  */
 2451 static int
 2452 vga_mmap_buf(video_adapter_t *adp, vm_offset_t offset, int prot)
 2453 {
 2454     if (adp->va_info.vi_flags & V_INFO_LINEAR)
 2455         return -1;
 2456 
 2457 #if VGA_DEBUG > 0
 2458     printf("vga_mmap_buf(): window:0x%x, offset:0x%x\n", 
 2459            adp->va_info.vi_window, offset);
 2460 #endif
 2461 
 2462     /* XXX: is this correct? */
 2463     if (offset > adp->va_window_size - PAGE_SIZE)
 2464         return -1;
 2465 
 2466 #ifdef __i386__
 2467     return i386_btop(adp->va_info.vi_window + offset);
 2468 #endif
 2469 #ifdef __alpha__
 2470     return alpha_btop(adp->va_info.vi_window + offset);
 2471 #endif
 2472 }
 2473 
 2474 #ifndef VGA_NO_MODE_CHANGE
 2475 
 2476 static void
 2477 planar_fill(video_adapter_t *adp, int val)
 2478 {
 2479     int length;
 2480     int at;                     /* position in the frame buffer */
 2481     int l;
 2482 
 2483     outw(GDCIDX, 0x0005);               /* read mode 0, write mode 0 */
 2484     outw(GDCIDX, 0x0003);               /* data rotate/function select */
 2485     outw(GDCIDX, 0x0f01);               /* set/reset enable */
 2486     outw(GDCIDX, 0xff08);               /* bit mask */
 2487     outw(GDCIDX, (val << 8) | 0x00);    /* set/reset */
 2488     at = 0;
 2489     length = adp->va_line_width*adp->va_info.vi_height;
 2490     while (length > 0) {
 2491         l = imin(length, adp->va_window_size);
 2492         (*vidsw[adp->va_index]->set_win_org)(adp, at);
 2493         bzero_io(adp->va_window, l);
 2494         length -= l;
 2495         at += l;
 2496     }
 2497     outw(GDCIDX, 0x0000);               /* set/reset */
 2498     outw(GDCIDX, 0x0001);               /* set/reset enable */
 2499 }
 2500 
 2501 static void
 2502 packed_fill(video_adapter_t *adp, int val)
 2503 {
 2504     int length;
 2505     int at;                     /* position in the frame buffer */
 2506     int l;
 2507 
 2508     at = 0;
 2509     length = adp->va_line_width*adp->va_info.vi_height;
 2510     while (length > 0) {
 2511         l = imin(length, adp->va_window_size);
 2512         (*vidsw[adp->va_index]->set_win_org)(adp, at);
 2513         fill_io(val, adp->va_window, l);
 2514         length -= l;
 2515         at += l;
 2516     }
 2517 }
 2518 
 2519 static void
 2520 direct_fill(video_adapter_t *adp, int val)
 2521 {
 2522     int length;
 2523     int at;                     /* position in the frame buffer */
 2524     int l;
 2525 
 2526     at = 0;
 2527     length = adp->va_line_width*adp->va_info.vi_height;
 2528     while (length > 0) {
 2529         l = imin(length, adp->va_window_size);
 2530         (*vidsw[adp->va_index]->set_win_org)(adp, at);
 2531         switch (adp->va_info.vi_pixel_size) {
 2532         case sizeof(u_int16_t):
 2533             fillw_io(val, adp->va_window, l/sizeof(u_int16_t));
 2534             break;
 2535         case 3:
 2536             /* FIXME */
 2537             break;
 2538         case sizeof(u_int32_t):
 2539             filll_io(val, adp->va_window, l/sizeof(u_int32_t));
 2540             break;
 2541         }
 2542         length -= l;
 2543         at += l;
 2544     }
 2545 }
 2546 
 2547 static int
 2548 vga_clear(video_adapter_t *adp)
 2549 {
 2550     switch (adp->va_info.vi_mem_model) {
 2551     case V_INFO_MM_TEXT:
 2552         /* do nothing? XXX */
 2553         break;
 2554     case V_INFO_MM_PLANAR:
 2555         planar_fill(adp, 0);
 2556         break;
 2557     case V_INFO_MM_PACKED:
 2558         packed_fill(adp, 0);
 2559         break;
 2560     case V_INFO_MM_DIRECT:
 2561         direct_fill(adp, 0);
 2562         break;
 2563     }
 2564     return 0;
 2565 }
 2566 
 2567 #ifdef notyet
 2568 static void
 2569 planar_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2570 {
 2571     int banksize;
 2572     int bank;
 2573     int pos;
 2574     int offset;                 /* offset within window */
 2575     int bx;
 2576     int l;
 2577 
 2578     outw(GDCIDX, 0x0005);               /* read mode 0, write mode 0 */
 2579     outw(GDCIDX, 0x0003);               /* data rotate/function select */
 2580     outw(GDCIDX, 0x0f01);               /* set/reset enable */
 2581     outw(GDCIDX, 0xff08);               /* bit mask */
 2582     outw(GDCIDX, (val << 8) | 0x00); /* set/reset */
 2583 
 2584     banksize = adp->va_window_size;
 2585     bank = -1;
 2586     while (cy > 0) {
 2587         pos = adp->va_line_width*y + x/8;
 2588         if (bank != pos/banksize) {
 2589             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2590             bank = pos/banksize;
 2591         }
 2592         offset = pos%banksize;
 2593         bx = (x + cx)/8 - x/8;
 2594         if (x % 8) {
 2595             outw(GDCIDX, ((0xff00 >> (x % 8)) & 0xff00) | 0x08);
 2596             writeb(adp->va_window + offset, 0);
 2597             ++offset;
 2598             --bx;
 2599             if (offset >= banksize) {
 2600                 offset = 0;
 2601                 ++bank;         /* next bank */
 2602                 (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2603             }
 2604             outw(GDCIDX, 0xff08);       /* bit mask */
 2605         }
 2606         while (bx > 0) {
 2607             l = imin(bx, banksize);
 2608             bzero_io(adp->va_window + offset, l);
 2609             offset += l;
 2610             bx -= l;
 2611             if (offset >= banksize) {
 2612                 offset = 0;
 2613                 ++bank;         /* next bank */
 2614                 (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2615             }
 2616         }
 2617         if ((x + cx) % 8) {
 2618             outw(GDCIDX, (~(0xff00 >> ((x + cx) % 8)) & 0xff00) | 0x08);
 2619             writeb(adp->va_window + offset, 0);
 2620             ++offset;
 2621             if (offset >= banksize) {
 2622                 offset = 0;
 2623                 ++bank;         /* next bank */
 2624                 (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2625             }
 2626             outw(GDCIDX, 0xff08);       /* bit mask */
 2627         }
 2628         ++y;
 2629         --cy;
 2630     }
 2631 
 2632     outw(GDCIDX, 0xff08);               /* bit mask */
 2633     outw(GDCIDX, 0x0000);               /* set/reset */
 2634     outw(GDCIDX, 0x0001);               /* set/reset enable */
 2635 }
 2636 
 2637 static void
 2638 packed_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2639 {
 2640     int banksize;
 2641     int bank;
 2642     int pos;
 2643     int offset;                 /* offset within window */
 2644     int end;
 2645 
 2646     banksize = adp->va_window_size;
 2647     bank = -1;
 2648     cx *= adp->va_info.vi_pixel_size;
 2649     while (cy > 0) {
 2650         pos = adp->va_line_width*y + x*adp->va_info.vi_pixel_size;
 2651         if (bank != pos/banksize) {
 2652             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2653             bank = pos/banksize;
 2654         }
 2655         offset = pos%banksize;
 2656         end = imin(offset + cx, banksize);
 2657         fill_io(val, adp->va_window + offset,
 2658                 (end - offset)/adp->va_info.vi_pixel_size);
 2659         /* the line may cross the window boundary */
 2660         if (offset + cx > banksize) {
 2661             ++bank;             /* next bank */
 2662             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2663             end = offset + cx - banksize;
 2664             fill_io(val, adp->va_window, end/adp->va_info.vi_pixel_size);
 2665         }
 2666         ++y;
 2667         --cy;
 2668     }
 2669 }
 2670 
 2671 static void
 2672 direct_fill_rect16(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2673 {
 2674     int banksize;
 2675     int bank;
 2676     int pos;
 2677     int offset;                 /* offset within window */
 2678     int end;
 2679 
 2680     /*
 2681      * XXX: the function assumes that banksize is a muliple of
 2682      * sizeof(u_int16_t).
 2683      */
 2684     banksize = adp->va_window_size;
 2685     bank = -1;
 2686     cx *= sizeof(u_int16_t);
 2687     while (cy > 0) {
 2688         pos = adp->va_line_width*y + x*sizeof(u_int16_t);
 2689         if (bank != pos/banksize) {
 2690             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2691             bank = pos/banksize;
 2692         }
 2693         offset = pos%banksize;
 2694         end = imin(offset + cx, banksize);
 2695         fillw_io(val, adp->va_window + offset,
 2696                  (end - offset)/sizeof(u_int16_t));
 2697         /* the line may cross the window boundary */
 2698         if (offset + cx > banksize) {
 2699             ++bank;             /* next bank */
 2700             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2701             end = offset + cx - banksize;
 2702             fillw_io(val, adp->va_window, end/sizeof(u_int16_t));
 2703         }
 2704         ++y;
 2705         --cy;
 2706     }
 2707 }
 2708 
 2709 static void
 2710 direct_fill_rect24(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2711 {
 2712     int banksize;
 2713     int bank;
 2714     int pos;
 2715     int offset;                 /* offset within window */
 2716     int end;
 2717     int i;
 2718     int j;
 2719     u_int8_t b[3];
 2720 
 2721     b[0] = val & 0x0000ff;
 2722     b[1] = (val >> 8) & 0x0000ff;
 2723     b[2] = (val >> 16) & 0x0000ff;
 2724     banksize = adp->va_window_size;
 2725     bank = -1;
 2726     cx *= 3;
 2727     while (cy > 0) {
 2728         pos = adp->va_line_width*y + x*3;
 2729         if (bank != pos/banksize) {
 2730             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2731             bank = pos/banksize;
 2732         }
 2733         offset = pos%banksize;
 2734         end = imin(offset + cx, banksize);
 2735         for (i = 0, j = offset; j < end; i = (++i)%3, ++j) {
 2736             writeb(adp->va_window + j, b[i]);
 2737         }
 2738         /* the line may cross the window boundary */
 2739         if (offset + cx >= banksize) {
 2740             ++bank;             /* next bank */
 2741             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2742             j = 0;
 2743             end = offset + cx - banksize;
 2744             for (; j < end; i = (++i)%3, ++j) {
 2745                 writeb(adp->va_window + j, b[i]);
 2746             }
 2747         }
 2748         ++y;
 2749         --cy;
 2750     }
 2751 }
 2752 
 2753 static void
 2754 direct_fill_rect32(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2755 {
 2756     int banksize;
 2757     int bank;
 2758     int pos;
 2759     int offset;                 /* offset within window */
 2760     int end;
 2761 
 2762     /*
 2763      * XXX: the function assumes that banksize is a muliple of
 2764      * sizeof(u_int32_t).
 2765      */
 2766     banksize = adp->va_window_size;
 2767     bank = -1;
 2768     cx *= sizeof(u_int32_t);
 2769     while (cy > 0) {
 2770         pos = adp->va_line_width*y + x*sizeof(u_int32_t);
 2771         if (bank != pos/banksize) {
 2772             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2773             bank = pos/banksize;
 2774         }
 2775         offset = pos%banksize;
 2776         end = imin(offset + cx, banksize);
 2777         filll_io(val, adp->va_window + offset,
 2778                  (end - offset)/sizeof(u_int32_t));
 2779         /* the line may cross the window boundary */
 2780         if (offset + cx > banksize) {
 2781             ++bank;             /* next bank */
 2782             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2783             end = offset + cx - banksize;
 2784             filll_io(val, adp->va_window, end/sizeof(u_int32_t));
 2785         }
 2786         ++y;
 2787         --cy;
 2788     }
 2789 }
 2790 
 2791 static int
 2792 vga_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2793 {
 2794     switch (adp->va_info.vi_mem_model) {
 2795     case V_INFO_MM_TEXT:
 2796         /* do nothing? XXX */
 2797         break;
 2798     case V_INFO_MM_PLANAR:
 2799         planar_fill_rect(adp, val, x, y, cx, cy);
 2800         break;
 2801     case V_INFO_MM_PACKED:
 2802         packed_fill_rect(adp, val, x, y, cx, cy);
 2803         break;
 2804     case V_INFO_MM_DIRECT:
 2805         switch (adp->va_info.vi_pixel_size) {
 2806         case sizeof(u_int16_t):
 2807             direct_fill_rect16(adp, val, x, y, cx, cy);
 2808             break;
 2809         case 3:
 2810             direct_fill_rect24(adp, val, x, y, cx, cy);
 2811             break;
 2812         case sizeof(u_int32_t):
 2813             direct_fill_rect32(adp, val, x, y, cx, cy);
 2814             break;
 2815         }
 2816         break;
 2817     }
 2818     return 0;
 2819 }
 2820 #else /* !notyet */
 2821 static int
 2822 vga_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2823 {
 2824     return ENODEV;
 2825 }
 2826 #endif /* notyet */
 2827 
 2828 static int
 2829 vga_bitblt(video_adapter_t *adp,...)
 2830 {
 2831     /* FIXME */
 2832     return ENODEV;
 2833 }
 2834 
 2835 #endif /* !VGA_NO_MODE_CHANGE */
 2836 
 2837 static int
 2838 get_palette(video_adapter_t *adp, int base, int count,
 2839             u_char *red, u_char *green, u_char *blue, u_char *trans)
 2840 {
 2841     u_char *r;
 2842     u_char *g;
 2843     u_char *b;
 2844 
 2845     if ((base < 0) || (base >= 256) || (base + count > 256))
 2846         return EINVAL;
 2847 
 2848     r = malloc(count*3, M_DEVBUF, M_WAITOK);
 2849     g = r + count;
 2850     b = g + count;
 2851     if (vga_save_palette2(adp, base, count, r, g, b))
 2852         return ENODEV;
 2853     copyout(r, red, count);
 2854     copyout(g, green, count);
 2855     copyout(b, blue, count);
 2856     if (trans != NULL) {
 2857         bzero(r, count);
 2858         copyout(r, trans, count);
 2859     }
 2860     free(r, M_DEVBUF);
 2861 
 2862     return 0;
 2863 }
 2864 
 2865 static int
 2866 set_palette(video_adapter_t *adp, int base, int count,
 2867             u_char *red, u_char *green, u_char *blue, u_char *trans)
 2868 {
 2869     u_char *r;
 2870     u_char *g;
 2871     u_char *b;
 2872     int err;
 2873 
 2874     if ((base < 0) || (base >= 256) || (base + count > 256))
 2875         return EINVAL;
 2876 
 2877     r = malloc(count*3, M_DEVBUF, M_WAITOK);
 2878     g = r + count;
 2879     b = g + count;
 2880     copyin(red, r, count);
 2881     copyin(green, g, count);
 2882     copyin(blue, b, count);
 2883     err = vga_load_palette2(adp, base, count, r, g, b);
 2884     free(r, M_DEVBUF);
 2885 
 2886     return (err ? ENODEV : 0);
 2887 }
 2888 
 2889 static int
 2890 vga_dev_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
 2891 {
 2892     switch (cmd) {
 2893     case FBIO_GETWINORG:        /* get frame buffer window origin */
 2894         *(u_int *)arg = 0;
 2895         return 0;
 2896 
 2897     case FBIO_SETWINORG:        /* set frame buffer window origin */
 2898         return ENODEV;
 2899 
 2900     case FBIO_SETDISPSTART:     /* set display start address */
 2901         return (set_display_start(adp, 
 2902                                   ((video_display_start_t *)arg)->x,
 2903                                   ((video_display_start_t *)arg)->y)
 2904                 ? ENODEV : 0);
 2905 
 2906     case FBIO_SETLINEWIDTH:     /* set scan line length in pixel */
 2907         return (set_line_length(adp, *(u_int *)arg) ? ENODEV : 0);
 2908 
 2909     case FBIO_GETPALETTE:       /* get color palette */
 2910         return get_palette(adp, ((video_color_palette_t *)arg)->index,
 2911                            ((video_color_palette_t *)arg)->count,
 2912                            ((video_color_palette_t *)arg)->red,
 2913                            ((video_color_palette_t *)arg)->green,
 2914                            ((video_color_palette_t *)arg)->blue,
 2915                            ((video_color_palette_t *)arg)->transparent);
 2916 
 2917     case FBIO_SETPALETTE:       /* set color palette */
 2918         return set_palette(adp, ((video_color_palette_t *)arg)->index,
 2919                            ((video_color_palette_t *)arg)->count,
 2920                            ((video_color_palette_t *)arg)->red,
 2921                            ((video_color_palette_t *)arg)->green,
 2922                            ((video_color_palette_t *)arg)->blue,
 2923                            ((video_color_palette_t *)arg)->transparent);
 2924 
 2925     case FBIOGTYPE:             /* get frame buffer type info. */
 2926         ((struct fbtype *)arg)->fb_type = fb_type(adp->va_type);
 2927         ((struct fbtype *)arg)->fb_height = adp->va_info.vi_height;
 2928         ((struct fbtype *)arg)->fb_width = adp->va_info.vi_width;
 2929         ((struct fbtype *)arg)->fb_depth = adp->va_info.vi_depth;
 2930         if ((adp->va_info.vi_depth <= 1) || (adp->va_info.vi_depth > 8))
 2931             ((struct fbtype *)arg)->fb_cmsize = 0;
 2932         else
 2933             ((struct fbtype *)arg)->fb_cmsize = 1 << adp->va_info.vi_depth;
 2934         ((struct fbtype *)arg)->fb_size = adp->va_buffer_size;
 2935         return 0;
 2936 
 2937     case FBIOGETCMAP:           /* get color palette */
 2938         return get_palette(adp, ((struct fbcmap *)arg)->index,
 2939                            ((struct fbcmap *)arg)->count,
 2940                            ((struct fbcmap *)arg)->red,
 2941                            ((struct fbcmap *)arg)->green,
 2942                            ((struct fbcmap *)arg)->blue, NULL);
 2943 
 2944     case FBIOPUTCMAP:           /* set color palette */
 2945         return set_palette(adp, ((struct fbcmap *)arg)->index,
 2946                            ((struct fbcmap *)arg)->count,
 2947                            ((struct fbcmap *)arg)->red,
 2948                            ((struct fbcmap *)arg)->green,
 2949                            ((struct fbcmap *)arg)->blue, NULL);
 2950 
 2951     default:
 2952         return fb_commonioctl(adp, cmd, arg);
 2953     }
 2954 }
 2955 
 2956 static void
 2957 dump_buffer(u_char *buf, size_t len)
 2958 {
 2959     int i;
 2960 
 2961     for(i = 0; i < len;) {
 2962         printf("%02x ", buf[i]);
 2963         if ((++i % 16) == 0)
 2964             printf("\n");
 2965     }
 2966 }
 2967 
 2968 /*
 2969  * diag():
 2970  * Print some information about the video adapter and video modes,
 2971  * with requested level of details.
 2972  *
 2973  * all adapters
 2974  */
 2975 static int
 2976 vga_diag(video_adapter_t *adp, int level)
 2977 {
 2978     u_char *mp;
 2979 #if FB_DEBUG > 1
 2980     video_info_t info;
 2981     int i;
 2982 #endif
 2983 
 2984     if (!vga_init_done)
 2985         return ENXIO;
 2986 
 2987 #if FB_DEBUG > 1
 2988 #ifndef VGA_NO_BIOS
 2989     printf("vga: RTC equip. code:0x%02x, DCC code:0x%02x\n",
 2990            rtcin(RTC_EQUIPMENT), readb(BIOS_PADDRTOVADDR(0x488)));
 2991     printf("vga: CRTC:0x%x, video option:0x%02x, ",
 2992            readw(BIOS_PADDRTOVADDR(0x463)),
 2993            readb(BIOS_PADDRTOVADDR(0x487)));
 2994     printf("rows:%d, cols:%d, font height:%d\n",
 2995            readb(BIOS_PADDRTOVADDR(0x44a)),
 2996            readb(BIOS_PADDRTOVADDR(0x484)) + 1,
 2997            readb(BIOS_PADDRTOVADDR(0x485)));
 2998 #endif /* VGA_NO_BIOS */
 2999 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
 3000     printf("vga: param table EGA/VGA:%p", video_mode_ptr);
 3001     printf(", CGA/MDA:%p\n", video_mode_ptr2);
 3002     printf("vga: rows_offset:%d\n", rows_offset);
 3003 #endif
 3004 #endif /* FB_DEBUG > 1 */
 3005 
 3006     fb_dump_adp_info(VGA_DRIVER_NAME, adp, level);
 3007 
 3008 #if FB_DEBUG > 1
 3009     if (adp->va_flags & V_ADP_MODECHANGE) {
 3010         for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
 3011             if (bios_vmode[i].vi_mode == NA)
 3012                 continue;
 3013             if (get_mode_param(bios_vmode[i].vi_mode) == NULL)
 3014                 continue;
 3015             fb_dump_mode_info(VGA_DRIVER_NAME, adp, &bios_vmode[i], level);
 3016         }
 3017     } else {
 3018         vga_get_info(adp, adp->va_initial_mode, &info); /* shouldn't fail */
 3019         fb_dump_mode_info(VGA_DRIVER_NAME, adp, &info, level);
 3020     }
 3021 #endif /* FB_DEBUG > 1 */
 3022 
 3023     if ((adp->va_type != KD_EGA) && (adp->va_type != KD_VGA))
 3024         return 0;
 3025 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
 3026     if (video_mode_ptr == NULL)
 3027         printf("vga%d: %s: WARNING: video mode switching is not "
 3028                "fully supported on this adapter\n",
 3029                adp->va_unit, adp->va_name);
 3030 #endif
 3031     if (level <= 0)
 3032         return 0;
 3033 
 3034     if (adp->va_type == KD_VGA) {
 3035         printf("VGA parameters upon power-up\n");
 3036         dump_buffer(adpstate.regs, sizeof(adpstate.regs));
 3037         printf("VGA parameters in BIOS for mode %d\n", adp->va_initial_mode);
 3038         dump_buffer(adpstate2.regs, sizeof(adpstate2.regs));
 3039     }
 3040 
 3041     mp = get_mode_param(adp->va_initial_mode);
 3042     if (mp == NULL)     /* this shouldn't be happening */
 3043         return 0;
 3044     printf("EGA/VGA parameters to be used for mode %d\n", adp->va_initial_mode);
 3045     dump_buffer(mp, V_MODE_PARAM_SIZE);
 3046 
 3047     return 0;
 3048 }

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