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

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    1 /*-
    2  * (MPSAFE ?)
    3  *
    4  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    5  * Copyright (c) 1992-1998 Søren Schmidt
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer as
   13  *    the first lines of this file unmodified.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. The name of the author may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * $FreeBSD: src/sys/dev/fb/vga.c,v 1.9.2.1 2001/08/11 02:58:44 yokota Exp $
   32  */
   33 
   34 #include "opt_vga.h"
   35 #include "opt_fb.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/conf.h>
   41 #include <sys/fcntl.h>
   42 #include <sys/malloc.h>
   43 #include <sys/fbio.h>
   44 #include <sys/thread2.h>
   45 
   46 #include <bus/isa/isareg.h>
   47 
   48 #include <machine/clock.h>
   49 #include <machine/md_var.h>
   50 #ifdef __i386__
   51 #include <machine/pc/bios.h>
   52 #endif
   53 
   54 #include <vm/vm.h>
   55 #include <vm/vm_param.h>
   56 #include <vm/pmap.h>
   57 
   58 #include "fbreg.h"
   59 #include "vgareg.h"
   60 
   61 #ifndef VGA_DEBUG
   62 #define VGA_DEBUG               0
   63 #endif
   64 
   65 /* machine/pc/bios.h has got too much i386-specific stuff in it */
   66 #ifndef BIOS_PADDRTOVADDR
   67 #define BIOS_PADDRTOVADDR(x) (((x) - ISA_HOLE_START) + atdevbase)
   68 #endif
   69 int
   70 vga_probe_unit(int unit, video_adapter_t *buf, int flags)
   71 {
   72         video_adapter_t *adp;
   73         video_switch_t *sw;
   74         int error;
   75 
   76         sw = vid_get_switch(VGA_DRIVER_NAME);
   77         if (sw == NULL)
   78                 return 0;
   79         error = (*sw->probe)(unit, &adp, NULL, flags);
   80         if (error)
   81                 return error;
   82         bcopy(adp, buf, sizeof(*buf));
   83         return 0;
   84 }
   85 
   86 int
   87 vga_attach_unit(int unit, vga_softc_t *sc, int flags)
   88 {
   89         video_switch_t *sw;
   90         int error;
   91 
   92         sw = vid_get_switch(VGA_DRIVER_NAME);
   93         if (sw == NULL)
   94                 return ENXIO;
   95 
   96         error = (*sw->probe)(unit, &sc->adp, NULL, flags);
   97         if (error)
   98                 return error;
   99         return (*sw->init)(unit, sc->adp, flags);
  100 }
  101 
  102 /* cdev driver functions */
  103 
  104 #ifdef FB_INSTALL_CDEV
  105 
  106 struct ucred;
  107 
  108 int
  109 vga_open(cdev_t dev, vga_softc_t *sc, int flag, int mode, struct ucred *cred)
  110 {
  111         if (sc == NULL)
  112                 return ENXIO;
  113         if (mode & (O_CREAT | O_APPEND | O_TRUNC))
  114                 return ENODEV;
  115 
  116         return genfbopen(&sc->gensc, sc->adp, flag, mode, cred);
  117 }
  118 
  119 int
  120 vga_close(cdev_t dev, vga_softc_t *sc, int flag, int mode)
  121 {
  122         return genfbclose(&sc->gensc, sc->adp, flag, mode);
  123 }
  124 
  125 int
  126 vga_read(cdev_t dev, vga_softc_t *sc, struct uio *uio, int flag)
  127 {
  128         return genfbread(&sc->gensc, sc->adp, uio, flag);
  129 }
  130 
  131 int
  132 vga_write(cdev_t dev, vga_softc_t *sc, struct uio *uio, int flag)
  133 {
  134         return genfbread(&sc->gensc, sc->adp, uio, flag);
  135 }
  136 
  137 int
  138 vga_ioctl(cdev_t dev, vga_softc_t *sc, u_long cmd, caddr_t arg, int flag,
  139           struct ucred *cred)
  140 {
  141         return genfbioctl(&sc->gensc, sc->adp, cmd, arg, flag, cred);
  142 }
  143 
  144 int
  145 vga_mmap(cdev_t dev, vga_softc_t *sc, vm_offset_t offset, int prot)
  146 {
  147         return genfbmmap(&sc->gensc, sc->adp, offset, prot);
  148 }
  149 
  150 #endif /* FB_INSTALL_CDEV */
  151 
  152 /* LOW-LEVEL */
  153 
  154 #define probe_done(adp)         ((adp)->va_flags & V_ADP_PROBED)
  155 #define init_done(adp)          ((adp)->va_flags & V_ADP_INITIALIZED)
  156 #define config_done(adp)        ((adp)->va_flags & V_ADP_REGISTERED)
  157 
  158 /* various sizes */
  159 #define V_MODE_MAP_SIZE         (M_VGA_CG320 + 1)
  160 #define V_MODE_PARAM_SIZE       64
  161 
  162 /* video adapter state buffer */
  163 struct adp_state {
  164     int                 sig;
  165 #define V_STATE_SIG     0x736f6962
  166     u_char              regs[V_MODE_PARAM_SIZE];
  167 };
  168 typedef struct adp_state adp_state_t;
  169 
  170 /* 
  171  * NOTE: `va_window' should have a virtual address, but is initialized
  172  * with a physical address in the following table, as verify_adapter()
  173  * will perform address conversion at run-time.
  174  */
  175 static video_adapter_t biosadapter = {
  176     0, KD_VGA, VGA_DRIVER_NAME, 0, 0, V_ADP_COLOR, IO_VGA, 32,
  177     EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 
  178     0, 0, 0, M_VGA_C80x25, M_C80x25, M_VGA_C80x25
  179 };
  180 
  181 /* video driver declarations */
  182 static int                      vga_configure(int flags);
  183        int                      (*vga_sub_configure)(int flags);
  184 #if 0
  185 static int                      vga_nop(void);
  186 #endif
  187 static int                      vga_error(void);
  188 static vi_probe_t               vga_probe;
  189 static vi_init_t                vga_init;
  190 static vi_get_info_t            vga_get_info;
  191 static vi_query_mode_t          vga_query_mode;
  192 static vi_set_mode_t            vga_set_mode;
  193 static vi_save_font_t           vga_save_font;
  194 static vi_load_font_t           vga_load_font;
  195 static vi_show_font_t           vga_show_font;
  196 static vi_save_palette_t        vga_save_palette;
  197 static vi_load_palette_t        vga_load_palette;
  198 static vi_set_border_t          vga_set_border;
  199 static vi_save_state_t          vga_save_state;
  200 static vi_load_state_t          vga_load_state;
  201 static vi_set_win_org_t         vga_set_origin;
  202 static vi_read_hw_cursor_t      vga_read_hw_cursor;
  203 static vi_set_hw_cursor_t       vga_set_hw_cursor;
  204 static vi_set_hw_cursor_shape_t vga_set_hw_cursor_shape;
  205 static vi_blank_display_t       vga_blank_display;
  206 static vi_mmap_t                vga_mmap_buf;
  207 static vi_ioctl_t               vga_dev_ioctl;
  208 #ifndef VGA_NO_MODE_CHANGE
  209 static vi_clear_t               vga_clear;
  210 static vi_fill_rect_t           vga_fill_rect;
  211 static vi_bitblt_t              vga_bitblt;
  212 #else /* VGA_NO_MODE_CHANGE */
  213 #define vga_clear               (vi_clear_t *)vga_error
  214 #define vga_fill_rect           (vi_fill_rect_t *)vga_error
  215 #define vga_bitblt              (vi_bitblt_t *)vga_error
  216 #endif
  217 static vi_diag_t                vga_diag;
  218 
  219 static video_switch_t vgavidsw = {
  220         vga_probe,
  221         vga_init,
  222         vga_get_info,
  223         vga_query_mode, 
  224         vga_set_mode,
  225         vga_save_font,
  226         vga_load_font,
  227         vga_show_font,
  228         vga_save_palette,
  229         vga_load_palette,
  230         vga_set_border,
  231         vga_save_state,
  232         vga_load_state,
  233         vga_set_origin,
  234         vga_read_hw_cursor,
  235         vga_set_hw_cursor,
  236         vga_set_hw_cursor_shape,
  237         vga_blank_display,
  238         vga_mmap_buf,
  239         vga_dev_ioctl,
  240         vga_clear,
  241         vga_fill_rect,
  242         vga_bitblt,
  243         vga_error,
  244         vga_error,
  245         vga_diag,
  246 };
  247 
  248 VIDEO_DRIVER(vga, vgavidsw, vga_configure);
  249 
  250 /* VGA BIOS standard video modes */
  251 #define EOT             (-1)
  252 #define NA              (-2)
  253 
  254 static video_info_t bios_vmode[] = {
  255     /* CGA */
  256     { M_B40x25,     V_INFO_COLOR, 40, 25, 8,  8, 2, 1,
  257       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  258     { M_C40x25,     V_INFO_COLOR, 40, 25, 8,  8, 4, 1,
  259       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  260     { M_B80x25,     V_INFO_COLOR, 80, 25, 8,  8, 2, 1,
  261       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  262     { M_C80x25,     V_INFO_COLOR, 80, 25, 8,  8, 4, 1,
  263       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  264     /* EGA */
  265     { M_ENH_B40x25, V_INFO_COLOR, 40, 25, 8, 14, 2, 1,
  266       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  267     { M_ENH_C40x25, V_INFO_COLOR, 40, 25, 8, 14, 4, 1,
  268       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  269     { M_ENH_B80x25, V_INFO_COLOR, 80, 25, 8, 14, 2, 1,
  270       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  271     { M_ENH_C80x25, V_INFO_COLOR, 80, 25, 8, 14, 4, 1,
  272       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  273     /* VGA */
  274     { M_VGA_C40x25, V_INFO_COLOR, 40, 25, 8, 16, 4, 1,
  275       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  276     { M_VGA_M80x25, 0,            80, 25, 8, 16, 2, 1,
  277       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  278     { M_VGA_C80x25, V_INFO_COLOR, 80, 25, 8, 16, 4, 1,
  279       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  280     /* MDA */
  281     { M_EGAMONO80x25, 0,          80, 25, 8, 14, 2, 1,
  282       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  283     /* EGA */
  284     { M_ENH_B80x43, 0,            80, 43, 8,  8, 2, 1,
  285       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  286     { M_ENH_C80x43, V_INFO_COLOR, 80, 43, 8,  8, 4, 1,
  287       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  288     /* VGA */
  289     { M_VGA_M80x30, 0,            80, 30, 8, 16, 2, 1,
  290       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  291     { M_VGA_C80x30, V_INFO_COLOR, 80, 30, 8, 16, 4, 1,
  292       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  293     { M_VGA_M80x50, 0,            80, 50, 8,  8, 2, 1,
  294       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  295     { M_VGA_C80x50, V_INFO_COLOR, 80, 50, 8,  8, 4, 1,
  296       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  297     { M_VGA_M80x60, 0,            80, 60, 8,  8, 2, 1,
  298       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  299     { M_VGA_C80x60, V_INFO_COLOR, 80, 60, 8,  8, 4, 1,
  300       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  301 
  302 #ifndef VGA_NO_MODE_CHANGE
  303 
  304 #ifdef VGA_WIDTH90
  305     { M_VGA_M90x25, 0,            90, 25, 8, 16, 2, 1,
  306       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  307     { M_VGA_C90x25, V_INFO_COLOR, 90, 25, 8, 16, 4, 1,
  308       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  309     { M_VGA_M90x30, 0,            90, 30, 8, 16, 2, 1,
  310       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  311     { M_VGA_C90x30, V_INFO_COLOR, 90, 30, 8, 16, 4, 1,
  312       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  313     { M_VGA_M90x43, 0,            90, 43, 8,  8, 2, 1,
  314       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  315     { M_VGA_C90x43, V_INFO_COLOR, 90, 43, 8,  8, 4, 1,
  316       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  317     { M_VGA_M90x50, 0,            90, 50, 8,  8, 2, 1,
  318       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  319     { M_VGA_C90x50, V_INFO_COLOR, 90, 50, 8,  8, 4, 1,
  320       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  321     { M_VGA_M90x60, 0,            90, 60, 8,  8, 2, 1,
  322       MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  323     { M_VGA_C90x60, V_INFO_COLOR, 90, 60, 8,  8, 4, 1,
  324       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_TEXT },
  325 #endif /* VGA_WIDTH90 */
  326 
  327     /* CGA */
  328     { M_BG320,      V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 2, 1,
  329       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_CGA },
  330     { M_CG320,      V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 2, 1,
  331       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_CGA },
  332     { M_BG640,      V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8,  8, 1, 1,
  333       CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0, V_INFO_MM_CGA },
  334     /* EGA */
  335     { M_CG320_D,    V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 4, 4,
  336       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0,
  337       V_INFO_MM_PLANAR },
  338     { M_CG640_E,    V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8,  8, 4, 4,
  339       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  340       V_INFO_MM_PLANAR },
  341     { M_EGAMONOAPA, V_INFO_GRAPHICS,                640, 350, 8, 14, 4, 4,
  342       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, 64*1024, 0, 0 ,
  343       V_INFO_MM_PLANAR },
  344     { M_ENHMONOAPA2,V_INFO_GRAPHICS,                640, 350, 8, 14, 4, 4,
  345       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  346       V_INFO_MM_PLANAR },
  347     { M_CG640x350,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 2, 2,
  348       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  349       V_INFO_MM_PLANAR },
  350     { M_ENH_CG640,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 4, 4,
  351       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  352       V_INFO_MM_PLANAR },
  353     /* VGA */
  354     { M_BG640x480,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
  355       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  356       V_INFO_MM_PLANAR },
  357     { M_CG640x480,  V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
  358       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 ,
  359       V_INFO_MM_PLANAR },
  360     { M_VGA_CG320,  V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8,  8, 8, 1,
  361       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0,
  362       V_INFO_MM_PACKED, 1 },
  363     { M_VGA_MODEX,  V_INFO_COLOR | V_INFO_GRAPHICS, 320, 240, 8,  8, 8, 4,
  364       GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0,
  365       V_INFO_MM_VGAX, 1 },
  366 #endif /* VGA_NO_MODE_CHANGE */
  367 
  368     { EOT },
  369 };
  370 
  371 static int              vga_init_done = FALSE;
  372 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  373 static u_char           *video_mode_ptr = NULL;
  374 #endif
  375 static u_char           *mode_map[V_MODE_MAP_SIZE];
  376 static adp_state_t      adpstate;
  377 static adp_state_t      adpstate2;
  378 static int              rows_offset = 1;
  379 
  380 /* local macros and functions */
  381 #define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
  382 
  383 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  384 static void map_mode_table(u_char **, u_char *);
  385 static int map_mode_num(int);
  386 #endif
  387 #ifndef VGA_NO_BIOS
  388 static int map_bios_mode_num(int);
  389 #endif
  390 static u_char *get_mode_param(int);
  391 static int verify_adapter(video_adapter_t *);
  392 static void update_adapter_info(video_adapter_t *, video_info_t *);
  393 static int probe_adapters(void);
  394 static int set_line_length(video_adapter_t *, int);
  395 static int set_display_start(video_adapter_t *, int, int);
  396 
  397 #ifndef VGA_NO_MODE_CHANGE
  398 #ifdef VGA_WIDTH90
  399 static void set_width90(adp_state_t *);
  400 #endif
  401 #endif /* !VGA_NO_MODE_CHANGE */
  402 
  403 #ifndef VGA_NO_FONT_LOADING
  404 #define PARAM_BUFSIZE   6
  405 static void set_font_mode(video_adapter_t *, u_char *);
  406 static void set_normal_mode(video_adapter_t *, u_char *);
  407 #endif
  408 
  409 #ifndef VGA_NO_MODE_CHANGE
  410 static void filll_io(int, vm_offset_t, size_t);
  411 static void planar_fill(video_adapter_t *, int);
  412 static void packed_fill(video_adapter_t *, int);
  413 static void direct_fill(video_adapter_t *, int);
  414 #ifdef notyet
  415 static void planar_fill_rect(video_adapter_t *, int, int, int, int, int);
  416 static void packed_fill_rect(video_adapter_t *, int, int, int, int, int);
  417 static void direct_fill_rect16(video_adapter_t *, int, int, int, int, int);
  418 static void direct_fill_rect24(video_adapter_t *, int, int, int, int, int);
  419 static void direct_fill_rect32(video_adapter_t *, int, int, int, int, int);
  420 #endif /* notyet */
  421 #endif /* !VGA_NO_MODE_CHANGE */
  422 
  423 #define ISMAPPED(pa, width)                             \
  424         (((pa) <= (u_long)0x1000 - (width))             \
  425          || ((pa) >= ISA_HOLE_START && (pa) <= 0x100000 - (width)))
  426 
  427 #define prologue(adp, flag, err)                        \
  428         if (!vga_init_done || !((adp)->va_flags & (flag)))      \
  429             return (err)
  430 
  431 /* a backdoor for the console driver */
  432 static int
  433 vga_configure(int flags)
  434 {
  435     probe_adapters();
  436     if (probe_done(&biosadapter)) {
  437         biosadapter.va_flags |= V_ADP_INITIALIZED;
  438         if (!config_done(&biosadapter) && !(vid_register(&biosadapter) < 0))
  439             biosadapter.va_flags |= V_ADP_REGISTERED;
  440     }
  441     if (vga_sub_configure != NULL)
  442         (*vga_sub_configure)(flags);
  443 
  444     return 1;
  445 }
  446 
  447 /* local subroutines */
  448 
  449 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  450 /* construct the mode parameter map (accept 40x25, 80x25 and 80x30 modes) */
  451 static void
  452 map_mode_table(u_char *map[], u_char *table)
  453 {
  454     int i, valid;
  455 
  456     for(i = 0; i < V_MODE_MAP_SIZE; ++i) {
  457         map[i] = table + i*V_MODE_PARAM_SIZE;
  458         valid = 0;
  459         if ((map[i][0] == 40 && map[i][1] == 24) ||
  460             (map[i][0] == 80 && (map[i][1] == 24 || map[i][1] == 29)))
  461             valid++;
  462         if (!valid)
  463             map[i] = NULL;
  464     }
  465 }
  466 #endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
  467 
  468 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  469 /* map the non-standard video mode to a known mode number */
  470 static int
  471 map_mode_num(int mode)
  472 {
  473     static struct {
  474         int from;
  475         int to;
  476     } mode_map[] = {
  477         { M_ENH_B80x43, M_ENH_B80x25 },
  478         { M_ENH_C80x43, M_ENH_C80x25 },
  479         { M_VGA_M80x30, M_VGA_M80x25 },
  480         { M_VGA_C80x30, M_VGA_C80x25 },
  481         { M_VGA_M80x50, M_VGA_M80x25 },
  482         { M_VGA_C80x50, M_VGA_C80x25 },
  483         { M_VGA_M80x60, M_VGA_M80x25 },
  484         { M_VGA_C80x60, M_VGA_C80x25 },
  485 #ifdef VGA_WIDTH90
  486         { M_VGA_M90x25, M_VGA_M80x25 },
  487         { M_VGA_C90x25, M_VGA_C80x25 },
  488         { M_VGA_M90x30, M_VGA_M80x25 },
  489         { M_VGA_C90x30, M_VGA_C80x25 },
  490         { M_VGA_M90x43, M_ENH_B80x25 },
  491         { M_VGA_C90x43, M_ENH_C80x25 },
  492         { M_VGA_M90x50, M_VGA_M80x25 },
  493         { M_VGA_C90x50, M_VGA_C80x25 },
  494         { M_VGA_M90x60, M_VGA_M80x25 },
  495         { M_VGA_C90x60, M_VGA_C80x25 },
  496 #endif
  497         { M_VGA_MODEX,  M_VGA_CG320 },
  498     };
  499     int i;
  500 
  501     for (i = 0; i < NELEM(mode_map); ++i) {
  502         if (mode_map[i].from == mode)
  503             return mode_map[i].to;
  504     }
  505     return mode;
  506 }
  507 #endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
  508 
  509 #ifndef VGA_NO_BIOS
  510 /* turn the BIOS video number into our video mode number */
  511 static int
  512 map_bios_mode_num(int bios_mode)
  513 {
  514     static int vga_modes[20] = {
  515         M_VGA_C40x25, M_VGA_C40x25,     /* 0, 1 */
  516         M_VGA_C80x25, M_VGA_C80x25,     /* 2, 3 */
  517         M_BG320, M_CG320,
  518         M_BG640,
  519         M_VGA_M80x25,                   /* 7 */
  520         8, 9, 10, 11, 12,
  521         M_CG320_D,
  522         M_CG640_E,
  523         M_ENHMONOAPA2,
  524         M_ENH_CG640,
  525         M_BG640x480, M_CG640x480, 
  526         M_VGA_CG320,
  527     };
  528 
  529     if (bios_mode < NELEM(vga_modes))
  530         return vga_modes[bios_mode];
  531 
  532     return M_VGA_C80x25;
  533 }
  534 #endif
  535 
  536 /* look up a parameter table entry */
  537 static u_char *
  538 get_mode_param(int mode)
  539 {
  540 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  541     if (mode >= V_MODE_MAP_SIZE)
  542         mode = map_mode_num(mode);
  543 #endif
  544     if ((mode >= 0) && (mode < V_MODE_MAP_SIZE))
  545         return mode_map[mode];
  546     else
  547         return NULL;
  548 }
  549 
  550 static int
  551 verify_adapter(video_adapter_t *adp)
  552 {
  553     vm_offset_t buf;
  554     u_int16_t v;
  555 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  556     u_int32_t p;
  557 #endif
  558 
  559     buf = BIOS_PADDRTOVADDR(adp->va_window);
  560     v = readw(buf);
  561     writew(buf, 0xA55A);
  562     if (readw(buf) != 0xA55A)
  563         return ENXIO;
  564     writew(buf, v);
  565 
  566     outb(CRTC, 7);
  567     if (inb(CRTC) != 7)
  568         return ENXIO;
  569 
  570     adp->va_flags |= V_ADP_STATELOAD | V_ADP_STATESAVE | V_ADP_PALETTE |
  571         V_ADP_BORDER;
  572 
  573 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  574     /* get the BIOS video mode pointer */
  575     p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x4a8);
  576     p = BIOS_SADDRTOLADDR(p);
  577     if (ISMAPPED(p, sizeof(u_int32_t))) {
  578         p = *(u_int32_t *)BIOS_PADDRTOVADDR(p);
  579         p = BIOS_SADDRTOLADDR(p);
  580         if (ISMAPPED(p, V_MODE_PARAM_SIZE))
  581             video_mode_ptr = (u_char *)BIOS_PADDRTOVADDR(p);
  582     }
  583 #endif
  584 
  585     return 0;
  586 }
  587 
  588 static void
  589 update_adapter_info(video_adapter_t *adp, video_info_t *info)
  590 {
  591     adp->va_flags |= V_ADP_COLOR;
  592     adp->va_window = BIOS_PADDRTOVADDR(info->vi_window);
  593     adp->va_window_size = info->vi_window_size;
  594     adp->va_window_gran = info->vi_window_gran;
  595     adp->va_window_orig = 0;
  596     /* XXX */
  597     adp->va_buffer = info->vi_buffer;
  598     adp->va_buffer_size = info->vi_buffer_size;
  599     if (info->vi_mem_model == V_INFO_MM_VGAX) {
  600         adp->va_line_width = info->vi_width/2;
  601     } else if (info->vi_flags & V_INFO_GRAPHICS) {
  602         switch (info->vi_depth/info->vi_planes) {
  603         case 1:
  604             adp->va_line_width = info->vi_width/8;
  605             break;
  606         case 2:
  607             adp->va_line_width = info->vi_width/4;
  608             break;
  609         case 4:
  610             adp->va_line_width = info->vi_width/2;
  611             break;
  612         case 8:
  613         default: /* shouldn't happen */
  614             adp->va_line_width = info->vi_width;
  615             break;
  616         }
  617     } else {
  618         adp->va_line_width = info->vi_width;
  619     }
  620     adp->va_disp_start.x = 0;
  621     adp->va_disp_start.y = 0;
  622     bcopy(info, &adp->va_info, sizeof(adp->va_info));
  623 }
  624 
  625 /* probe video adapters and return the number of detected adapters */
  626 static int
  627 probe_adapters(void)
  628 {
  629     video_adapter_t *adp;
  630     video_info_t info;
  631 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
  632     u_char *mp;
  633 #endif
  634     int i;
  635 
  636     /* do this test only once */
  637     if (vga_init_done)
  638         return 1;
  639     vga_init_done = TRUE;
  640 
  641     if (verify_adapter(&biosadapter) != 0)
  642         return 0;
  643 
  644     biosadapter.va_flags |= V_ADP_PROBED;
  645 #ifndef VGA_NO_BIOS
  646     biosadapter.va_initial_bios_mode = readb(BIOS_PADDRTOVADDR(0x449));
  647     biosadapter.va_mode = biosadapter.va_initial_mode =
  648         map_bios_mode_num(biosadapter.va_initial_bios_mode);
  649 #endif
  650 
  651     /*
  652      * Ensure a zero start address.  This is mainly to recover after
  653      * switching from pcvt using userconfig().  The registers are w/o
  654      * for old hardware so it's too hard to relocate the active screen
  655      * memory.
  656      * This must be done before vga_save_state() for VGA.
  657      */
  658     outb(CRTC, 12);
  659     outb(CRTC + 1, 0);
  660     outb(CRTC, 13);
  661     outb(CRTC + 1, 0);
  662 
  663     /* the video mode parameter table in VGA BIOS */
  664     /* NOTE: there can be only one VGA recognized by the video BIOS.
  665      */
  666     adp = &biosadapter;
  667     bzero(mode_map, sizeof(mode_map));
  668     vga_save_state(adp, &adpstate, sizeof(adpstate));
  669     for(i = 0; i < 16; i++)
  670         adp->va_palette_regs[i] = adpstate.regs[35 + i];
  671 #if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
  672     mode_map[adp->va_initial_mode] = adpstate.regs;
  673     rows_offset = 1;
  674 #else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
  675     if (video_mode_ptr == NULL) {
  676         mode_map[adp->va_initial_mode] = adpstate.regs;
  677         rows_offset = 1;
  678     } else {
  679         /* discard modes that we are not familiar with */
  680         map_mode_table(mode_map, video_mode_ptr);
  681         mp = get_mode_param(adp->va_initial_mode);
  682 #if !defined(VGA_KEEP_POWERON_MODE)
  683         if (mp != NULL) {
  684             bcopy(mp, adpstate2.regs, sizeof(adpstate2.regs));
  685             rows_offset = adpstate.regs[1] + 1 - mp[1];
  686         } else
  687 #endif
  688         {
  689             mode_map[adp->va_initial_mode] = adpstate.regs;
  690             rows_offset = 1;
  691         }
  692     }
  693 #endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
  694 
  695 #ifndef VGA_NO_MODE_CHANGE
  696     adp->va_flags |= V_ADP_MODECHANGE;
  697 #endif
  698 #ifndef VGA_NO_FONT_LOADING
  699     adp->va_flags |= V_ADP_FONT;
  700 #endif
  701 
  702     /* XXX remove conflicting modes */
  703     for (i = 0; i < M_VGA_CG320; i++) {
  704         if (vga_get_info(&biosadapter, i, &info))
  705             continue;
  706         if ((info.vi_flags & V_INFO_COLOR) != V_ADP_COLOR)
  707             mode_map[i] = NULL;
  708     }
  709 
  710     /* buffer address */
  711     vga_get_info(&biosadapter, biosadapter.va_initial_mode, &info);
  712     info.vi_flags &= ~V_INFO_LINEAR; /* XXX */
  713     update_adapter_info(&biosadapter, &info);
  714 
  715     /*
  716      * XXX: we should verify the following values for the primary adapter...
  717      * crtc I/O port address: *(u_int16_t *)BIOS_PADDRTOVADDR(0x463);
  718      * color/mono display: (*(u_int8_t *)BIOS_PADDRTOVADDR(0x487) & 0x02) 
  719      *                     ? 0 : V_ADP_COLOR;
  720      * columns: *(u_int8_t *)BIOS_PADDRTOVADDR(0x44a);
  721      * rows: *(u_int8_t *)BIOS_PADDRTOVADDR(0x484);
  722      * font size: *(u_int8_t *)BIOS_PADDRTOVADDR(0x485);
  723      * buffer size: *(u_int16_t *)BIOS_PADDRTOVADDR(0x44c);
  724      */
  725 
  726     return 1;
  727 }
  728 
  729 /* set the scan line length in pixel */
  730 static int
  731 set_line_length(video_adapter_t *adp, int pixel)
  732 {
  733     u_char *mp;
  734     int ppw;    /* pixels per word */
  735     int bpl;    /* bytes per line */
  736     int count;
  737 
  738     mp = get_mode_param(adp->va_mode);
  739     if (mp == NULL)
  740         return EINVAL;
  741 
  742     switch (adp->va_info.vi_mem_model) {
  743     case V_INFO_MM_PLANAR:
  744         ppw = 16/(adp->va_info.vi_depth/adp->va_info.vi_planes);
  745         count = (pixel + ppw - 1)/ppw/2;
  746         bpl = ((pixel + ppw - 1)/ppw/2)*4;
  747         break;
  748     case V_INFO_MM_PACKED:
  749         count = (pixel + 7)/8;
  750         bpl = ((pixel + 7)/8)*8;
  751         break;
  752     case V_INFO_MM_TEXT:
  753         count = (pixel + 7)/8;                  /* columns */
  754         bpl = (pixel + 7)/8;                    /* columns */
  755         break;
  756     default:
  757         return ENODEV;
  758     }
  759 
  760     if (mp[10 + 0x17] & 0x40)                   /* CRTC mode control reg */
  761         count *= 2;                             /* byte mode */
  762     outb(CRTC, 0x13);
  763     outb(CRTC, count);
  764     adp->va_line_width = bpl;
  765 
  766     return 0;
  767 }
  768 
  769 static int
  770 set_display_start(video_adapter_t *adp, int x, int y)
  771 {
  772     int off;    /* byte offset (graphics mode)/word offset (text mode) */
  773     int poff;   /* pixel offset */
  774     int roff;   /* row offset */
  775     int ppb;    /* pixels per byte */
  776 
  777     if (adp->va_info.vi_flags & V_INFO_GRAPHICS) {
  778         ppb = 8/(adp->va_info.vi_depth/adp->va_info.vi_planes);
  779         off = y*adp->va_line_width + x/ppb;
  780         roff = 0;
  781         poff = x%ppb;
  782     } else {
  783         outb(TSIDX, 1);
  784         if (inb(TSREG) & 1)
  785             ppb = 9;
  786         else
  787             ppb = 8;
  788         off = y/adp->va_info.vi_cheight*adp->va_line_width + x/ppb;
  789         roff = y%adp->va_info.vi_cheight;
  790         /* FIXME: is this correct? XXX */
  791         if (ppb == 8)
  792             poff = x%ppb;
  793         else
  794             poff = (x + 8)%ppb;
  795     }
  796 
  797     /* start address */
  798     outb(CRTC, 0xc);            /* high */
  799     outb(CRTC + 1, off >> 8);
  800     outb(CRTC, 0xd);            /* low */
  801     outb(CRTC + 1, off & 0xff);
  802 
  803     /* horizontal pel pan */
  804     inb(CRTC + 6);
  805     outb(ATC, 0x13 | 0x20);
  806     outb(ATC, poff);
  807     inb(CRTC + 6);
  808     outb(ATC, 0x20);
  809 
  810     /* preset raw scan */
  811     outb(CRTC, 8);
  812     outb(CRTC + 1, roff);
  813 
  814     adp->va_disp_start.x = x;
  815     adp->va_disp_start.y = y;
  816     return 0;
  817 }
  818 
  819 #ifndef VGA_NO_MODE_CHANGE
  820 #if defined(__i386__) || defined(__x86_64__)    /* XXX */
  821 static void
  822 fill(int val, void *d, size_t size)
  823 {
  824     u_char *p = d;
  825 
  826     while (size-- > 0)
  827         *p++ = val;
  828 }
  829 #endif /* __i386__ || __x86_64__ */
  830 
  831 static void
  832 filll_io(int val, vm_offset_t d, size_t size)
  833 {
  834     while (size-- > 0) {
  835         writel(d, val);
  836         d += sizeof(u_int32_t);
  837     }
  838 }
  839 #endif /* !VGA_NO_MODE_CHANGE */
  840 
  841 /* entry points */
  842 
  843 #if 0
  844 static int
  845 vga_nop(void)
  846 {
  847     return 0;
  848 }
  849 #endif
  850 
  851 static int
  852 vga_error(void)
  853 {
  854     return ENODEV;
  855 }
  856 
  857 static int
  858 vga_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
  859 {
  860     probe_adapters();
  861     if (unit != 0)
  862         return ENXIO;
  863 
  864     *adpp = &biosadapter;
  865 
  866     return 0;
  867 }
  868 
  869 static int
  870 vga_init(int unit, video_adapter_t *adp, int flags)
  871 {
  872     if ((unit != 0) || (adp == NULL) || !probe_done(adp))
  873         return ENXIO;
  874 
  875     if (!init_done(adp)) {
  876         /* nothing to do really... */
  877         adp->va_flags |= V_ADP_INITIALIZED;
  878     }
  879 
  880     if (!config_done(adp)) {
  881         if (vid_register(adp) < 0)
  882                 return ENXIO;
  883         adp->va_flags |= V_ADP_REGISTERED;
  884     }
  885     if (vga_sub_configure != NULL)
  886         (*vga_sub_configure)(0);
  887 
  888     return 0;
  889 }
  890 
  891 /*
  892  * get_info():
  893  * Return the video_info structure of the requested video mode.
  894  */
  895 static int
  896 vga_get_info(video_adapter_t *adp, int mode, video_info_t *info)
  897 {
  898     int i;
  899 
  900     if (!vga_init_done)
  901         return ENXIO;
  902 
  903 #ifndef VGA_NO_MODE_CHANGE
  904     if (adp->va_flags & V_ADP_MODECHANGE) {
  905         /*
  906          * If the parameter table entry for this mode is not found, 
  907          * the mode is not supported...
  908          */
  909         if (get_mode_param(mode) == NULL)
  910             return EINVAL;
  911     } else
  912 #endif /* VGA_NO_MODE_CHANGE */
  913     {
  914         /* 
  915          * Even if we don't support video mode switching on this adapter,
  916          * the information on the initial (thus current) video mode 
  917          * should be made available.
  918          */
  919         if (mode != adp->va_initial_mode)
  920             return EINVAL;
  921     }
  922 
  923     for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
  924         if (bios_vmode[i].vi_mode == NA)
  925             continue;
  926         if (mode == bios_vmode[i].vi_mode) {
  927             *info = bios_vmode[i];
  928             /* XXX */
  929             info->vi_buffer_size = info->vi_window_size*info->vi_planes;
  930             return 0;
  931         }
  932     }
  933     return EINVAL;
  934 }
  935 
  936 /*
  937  * query_mode():
  938  * Find a video mode matching the requested parameters.
  939  * Fields filled with 0 are considered "don't care" fields and
  940  * match any modes.
  941  */
  942 static int
  943 vga_query_mode(video_adapter_t *adp, video_info_t *info)
  944 {
  945     int i;
  946 
  947     if (!vga_init_done)
  948         return ENXIO;
  949 
  950     for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
  951         if (bios_vmode[i].vi_mode == NA)
  952             continue;
  953 
  954         if ((info->vi_width != 0)
  955             && (info->vi_width != bios_vmode[i].vi_width))
  956                 continue;
  957         if ((info->vi_height != 0)
  958             && (info->vi_height != bios_vmode[i].vi_height))
  959                 continue;
  960         if ((info->vi_cwidth != 0)
  961             && (info->vi_cwidth != bios_vmode[i].vi_cwidth))
  962                 continue;
  963         if ((info->vi_cheight != 0)
  964             && (info->vi_cheight != bios_vmode[i].vi_cheight))
  965                 continue;
  966         if ((info->vi_depth != 0)
  967             && (info->vi_depth != bios_vmode[i].vi_depth))
  968                 continue;
  969         if ((info->vi_planes != 0)
  970             && (info->vi_planes != bios_vmode[i].vi_planes))
  971                 continue;
  972         /* XXX: should check pixel format, memory model */
  973         if ((info->vi_flags != 0)
  974             && (info->vi_flags != bios_vmode[i].vi_flags))
  975                 continue;
  976 
  977         /* verify if this mode is supported on this adapter */
  978         if (vga_get_info(adp, bios_vmode[i].vi_mode, info))
  979                 continue;
  980         return 0;
  981     }
  982     return ENODEV;
  983 }
  984 
  985 /*
  986  * set_mode():
  987  * Change the video mode.
  988  */
  989 
  990 #ifndef VGA_NO_MODE_CHANGE
  991 #ifdef VGA_WIDTH90
  992 static void
  993 set_width90(adp_state_t *params)
  994 {
  995     /* 
  996      * Based on code submitted by Kelly Yancey (kbyanc@freedomnet.com)
  997      * and alexv@sui.gda.itesm.mx.
  998      */
  999     params->regs[5] |= 1;               /* toggle 8 pixel wide fonts */
 1000     params->regs[10+0x0] = 0x6b;
 1001     params->regs[10+0x1] = 0x59;
 1002     params->regs[10+0x2] = 0x5a;
 1003     params->regs[10+0x3] = 0x8e;
 1004     params->regs[10+0x4] = 0x5e;
 1005     params->regs[10+0x5] = 0x8a;
 1006     params->regs[10+0x13] = 45;
 1007     params->regs[35+0x13] = 0;
 1008 }
 1009 #endif /* VGA_WIDTH90 */
 1010 #endif /* !VGA_NO_MODE_CHANGE */
 1011 
 1012 static int
 1013 vga_set_mode(video_adapter_t *adp, int mode)
 1014 {
 1015 #ifndef VGA_NO_MODE_CHANGE
 1016     video_info_t info;
 1017     adp_state_t params;
 1018 
 1019     prologue(adp, V_ADP_MODECHANGE, ENODEV);
 1020 
 1021     if (vga_get_info(adp, mode, &info))
 1022         return EINVAL;
 1023 
 1024     lwkt_gettoken(&tty_token);
 1025 
 1026 #if VGA_DEBUG > 1
 1027     kprintf("vga_set_mode(): setting mode %d\n", mode);
 1028 #endif
 1029 
 1030     params.sig = V_STATE_SIG;
 1031     bcopy(get_mode_param(mode), params.regs, sizeof(params.regs));
 1032 
 1033     switch (mode) {
 1034 #ifdef VGA_WIDTH90
 1035     case M_VGA_C90x60: case M_VGA_M90x60:
 1036         set_width90(&params);
 1037         /* FALLTHROUGH */
 1038 #endif
 1039     case M_VGA_C80x60: case M_VGA_M80x60:
 1040         params.regs[2]  = 0x08;
 1041         params.regs[19] = 0x47;
 1042         goto special_480l;
 1043 
 1044 #ifdef VGA_WIDTH90
 1045     case M_VGA_C90x30: case M_VGA_M90x30:
 1046         set_width90(&params);
 1047         /* FALLTHROUGH */
 1048 #endif
 1049     case M_VGA_C80x30: case M_VGA_M80x30:
 1050         params.regs[19] = 0x4f;
 1051 special_480l:
 1052         params.regs[9] |= 0xc0;
 1053         params.regs[16] = 0x08;
 1054         params.regs[17] = 0x3e;
 1055         params.regs[26] = 0xea;
 1056         params.regs[28] = 0xdf;
 1057         params.regs[31] = 0xe7;
 1058         params.regs[32] = 0x04;
 1059         goto setup_mode;
 1060 
 1061 #ifdef VGA_WIDTH90
 1062     case M_VGA_C90x43: case M_VGA_M90x43:
 1063         set_width90(&params);
 1064         /* FALLTHROUGH */
 1065 #endif
 1066     case M_ENH_C80x43: case M_ENH_B80x43:
 1067         params.regs[28] = 87;
 1068         goto special_80x50;
 1069 
 1070 #ifdef VGA_WIDTH90
 1071     case M_VGA_C90x50: case M_VGA_M90x50:
 1072         set_width90(&params);
 1073         /* FALLTHROUGH */
 1074 #endif
 1075     case M_VGA_C80x50: case M_VGA_M80x50:
 1076 special_80x50:
 1077         params.regs[2] = 8;
 1078         params.regs[19] = 7;
 1079         goto setup_mode;
 1080 
 1081 #ifdef VGA_WIDTH90
 1082     case M_VGA_C90x25: case M_VGA_M90x25:
 1083         set_width90(&params);
 1084         /* FALLTHROUGH */
 1085 #endif
 1086     case M_VGA_C40x25: case M_VGA_C80x25:
 1087     case M_VGA_M80x25:
 1088     case M_B40x25:     case M_C40x25:
 1089     case M_B80x25:     case M_C80x25:
 1090     case M_ENH_B40x25: case M_ENH_C40x25:
 1091     case M_ENH_B80x25: case M_ENH_C80x25:
 1092     case M_EGAMONO80x25:
 1093 
 1094 setup_mode:
 1095         vga_load_state(adp, &params);
 1096         break;
 1097 
 1098     case M_VGA_MODEX:
 1099         /* "unchain" the VGA mode */
 1100         params.regs[5-1+0x04] &= 0xf7;
 1101         params.regs[5-1+0x04] |= 0x04;
 1102         /* turn off doubleword mode */
 1103         params.regs[10+0x14] &= 0xbf;
 1104         /* turn off word addressing */
 1105         params.regs[10+0x17] |= 0x40;
 1106         /* set logical screen width */
 1107         params.regs[10+0x13] = 80;
 1108         /* set 240 lines */
 1109         params.regs[10+0x11] = 0x2c;
 1110         params.regs[10+0x06] = 0x0d;
 1111         params.regs[10+0x07] = 0x3e;
 1112         params.regs[10+0x10] = 0xea;
 1113         params.regs[10+0x11] = 0xac;
 1114         params.regs[10+0x12] = 0xdf;
 1115         params.regs[10+0x15] = 0xe7;
 1116         params.regs[10+0x16] = 0x06;
 1117         /* set vertical sync polarity to reflect aspect ratio */
 1118         params.regs[9] = 0xe3;
 1119         goto setup_grmode;
 1120 
 1121     case M_BG320:     case M_CG320:     case M_BG640:
 1122     case M_CG320_D:   case M_CG640_E:
 1123     case M_CG640x350: case M_ENH_CG640:
 1124     case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
 1125 
 1126 setup_grmode:
 1127         vga_load_state(adp, &params);
 1128         break;
 1129 
 1130     default:
 1131         lwkt_reltoken(&tty_token);
 1132         return EINVAL;
 1133     }
 1134 
 1135     adp->va_mode = mode;
 1136     info.vi_flags &= ~V_INFO_LINEAR; /* XXX */
 1137     update_adapter_info(adp, &info);
 1138 
 1139     /* move hardware cursor out of the way */
 1140     (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
 1141 
 1142     lwkt_reltoken(&tty_token);
 1143     return 0;
 1144 #else /* VGA_NO_MODE_CHANGE */
 1145     lwkt_reltoken(&tty_token);
 1146     return ENODEV;
 1147 #endif /* VGA_NO_MODE_CHANGE */
 1148 }
 1149 
 1150 #ifndef VGA_NO_FONT_LOADING
 1151 
 1152 static void
 1153 set_font_mode(video_adapter_t *adp, u_char *buf)
 1154 {
 1155     crit_enter();
 1156 
 1157     /* save register values */
 1158     outb(TSIDX, 0x02); buf[0] = inb(TSREG);
 1159     outb(TSIDX, 0x04); buf[1] = inb(TSREG);
 1160     outb(GDCIDX, 0x04); buf[2] = inb(GDCREG);
 1161     outb(GDCIDX, 0x05); buf[3] = inb(GDCREG);
 1162     outb(GDCIDX, 0x06); buf[4] = inb(GDCREG);
 1163     inb(CRTC + 6);
 1164     outb(ATC, 0x10); buf[5] = inb(ATC + 1);
 1165 
 1166     /* setup vga for loading fonts */
 1167     inb(CRTC + 6);                              /* reset flip-flop */
 1168     outb(ATC, 0x10); outb(ATC, buf[5] & ~0x01);
 1169     inb(CRTC + 6);                              /* reset flip-flop */
 1170     outb(ATC, 0x20);                            /* enable palette */
 1171 
 1172 #ifdef VGA_ALT_SEQACCESS
 1173     outw(TSIDX, 0x0100);
 1174 #endif
 1175     outw(TSIDX, 0x0402);
 1176     outw(TSIDX, 0x0704);
 1177 #ifdef VGA_ALT_SEQACCESS
 1178     outw(TSIDX, 0x0300);
 1179 #endif
 1180     outw(GDCIDX, 0x0204);
 1181     outw(GDCIDX, 0x0005);
 1182     outw(GDCIDX, 0x0406);               /* addr = a0000, 64kb */
 1183 
 1184     crit_exit();
 1185 }
 1186 
 1187 static void
 1188 set_normal_mode(video_adapter_t *adp, u_char *buf)
 1189 {
 1190     crit_enter();
 1191 
 1192     /* setup vga for normal operation mode again */
 1193     inb(CRTC + 6);                              /* reset flip-flop */
 1194     outb(ATC, 0x10); outb(ATC, buf[5]);
 1195     inb(CRTC + 6);                              /* reset flip-flop */
 1196     outb(ATC, 0x20);                            /* enable palette */
 1197 
 1198 #ifdef VGA_ALT_SEQACCESS
 1199     outw(TSIDX, 0x0100);
 1200 #endif
 1201     outw(TSIDX, 0x0002 | (buf[0] << 8));
 1202     outw(TSIDX, 0x0004 | (buf[1] << 8));
 1203 #ifdef VGA_ALT_SEQACCESS
 1204     outw(TSIDX, 0x0300);
 1205 #endif
 1206     outw(GDCIDX, 0x0004 | (buf[2] << 8));
 1207     outw(GDCIDX, 0x0005 | (buf[3] << 8));
 1208     outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x0c)<<8));
 1209 
 1210     crit_exit();
 1211 }
 1212 
 1213 #endif /* VGA_NO_FONT_LOADING */
 1214 
 1215 /*
 1216  * save_font():
 1217  * Read the font data in the requested font page from the video adapter.
 1218  */
 1219 static int
 1220 vga_save_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
 1221               int ch, int count)
 1222 {
 1223 #ifndef VGA_NO_FONT_LOADING
 1224     u_char buf[PARAM_BUFSIZE];
 1225     vm_offset_t segment;
 1226     int c;
 1227 #ifdef VGA_ALT_SEQACCESS
 1228     u_char val = 0;
 1229 #endif
 1230 
 1231     prologue(adp, V_ADP_FONT, ENODEV);
 1232 
 1233     if (fontsize < 14) {
 1234         /* FONT_8 */
 1235         fontsize = 8;
 1236     } else if (fontsize >= 32) {
 1237         fontsize = 32;
 1238     } else if (fontsize >= 16) {
 1239         /* FONT_16 */
 1240         fontsize = 16;
 1241     } else {
 1242         /* FONT_14 */
 1243         fontsize = 14;
 1244     }
 1245 
 1246     if (page < 0 || page >= 8)
 1247         return EINVAL;
 1248     segment = FONT_BUF + 0x4000*page;
 1249     if (page > 3)
 1250         segment -= 0xe000;
 1251 
 1252 #ifdef VGA_ALT_SEQACCESS
 1253     crit_enter();
 1254     outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1255     outb(TSIDX, 0x01); val = inb(TSREG);        /* disable screen */
 1256     outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
 1257     outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1258     crit_exit();
 1259 #endif
 1260 
 1261     set_font_mode(adp, buf);
 1262     if (fontsize == 32) {
 1263         bcopy_fromio((uintptr_t)segment + ch*32, data, fontsize*count);
 1264     } else {
 1265         for (c = ch; count > 0; ++c, --count) {
 1266             bcopy_fromio((uintptr_t)segment + c*32, data, fontsize);
 1267             data += fontsize;
 1268         }
 1269     }
 1270     set_normal_mode(adp, buf);
 1271 
 1272 #ifdef VGA_ALT_SEQACCESS
 1273     crit_enter();
 1274     outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1275     outb(TSIDX, 0x01); outb(TSREG, val & 0xdf); /* enable screen */
 1276     outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1277     crit_exit();
 1278 #endif
 1279 
 1280     return 0;
 1281 #else /* VGA_NO_FONT_LOADING */
 1282     return ENODEV;
 1283 #endif /* VGA_NO_FONT_LOADING */
 1284 }
 1285 
 1286 /*
 1287  * load_font():
 1288  * Set the font data in the requested font page.
 1289  * NOTE: it appears that some recent video adapters do not support
 1290  * the font page other than 0... XXX
 1291  */
 1292 static int
 1293 vga_load_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
 1294               int ch, int count)
 1295 {
 1296 #ifndef VGA_NO_FONT_LOADING
 1297     u_char buf[PARAM_BUFSIZE];
 1298     vm_offset_t segment;
 1299     int c;
 1300 #ifdef VGA_ALT_SEQACCESS
 1301     u_char val = 0;
 1302 #endif
 1303 
 1304     prologue(adp, V_ADP_FONT, ENODEV);
 1305 
 1306     if (fontsize < 14) {
 1307         /* FONT_8 */
 1308         fontsize = 8;
 1309     } else if (fontsize >= 32) {
 1310         fontsize = 32;
 1311     } else if (fontsize >= 16) {
 1312         /* FONT_16 */
 1313         fontsize = 16;
 1314     } else {
 1315         /* FONT_14 */
 1316         fontsize = 14;
 1317     }
 1318 
 1319     if (page < 0 || page >= 8)
 1320         return EINVAL;
 1321     segment = FONT_BUF + 0x4000*page;
 1322     if (page > 3)
 1323         segment -= 0xe000;
 1324 
 1325 #ifdef VGA_ALT_SEQACCESS
 1326     crit_enter();
 1327     outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1328     outb(TSIDX, 0x01); val = inb(TSREG);        /* disable screen */
 1329     outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
 1330     outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1331     crit_exit();
 1332 #endif
 1333 
 1334     set_font_mode(adp, buf);
 1335     if (fontsize == 32) {
 1336         bcopy_toio(data, (uintptr_t)segment + ch*32, fontsize*count);
 1337     } else {
 1338         for (c = ch; count > 0; ++c, --count) {
 1339             bcopy_toio(data, (uintptr_t)segment + c*32, fontsize);
 1340             data += fontsize;
 1341         }
 1342     }
 1343     set_normal_mode(adp, buf);
 1344 
 1345 #ifdef VGA_ALT_SEQACCESS
 1346     crit_enter();
 1347     outb(TSIDX, 0x00); outb(TSREG, 0x01);
 1348     outb(TSIDX, 0x01); outb(TSREG, val & 0xdf); /* enable screen */
 1349     outb(TSIDX, 0x00); outb(TSREG, 0x03);
 1350     crit_exit();
 1351 #endif
 1352 
 1353     return 0;
 1354 #else /* VGA_NO_FONT_LOADING */
 1355     return ENODEV;
 1356 #endif /* VGA_NO_FONT_LOADING */
 1357 }
 1358 
 1359 /*
 1360  * show_font():
 1361  * Activate the requested font page.
 1362  * NOTE: it appears that some recent video adapters do not support
 1363  * the font page other than 0... XXX
 1364  */
 1365 static int
 1366 vga_show_font(video_adapter_t *adp, int page)
 1367 {
 1368 #ifndef VGA_NO_FONT_LOADING
 1369     static u_char cg[] = { 0x00, 0x05, 0x0a, 0x0f, 0x30, 0x35, 0x3a, 0x3f };
 1370 
 1371     prologue(adp, V_ADP_FONT, ENODEV);
 1372     if (page < 0 || page >= 8)
 1373         return EINVAL;
 1374 
 1375     crit_enter();
 1376     outb(TSIDX, 0x03); outb(TSREG, cg[page]);
 1377     crit_exit();
 1378 
 1379     return 0;
 1380 #else /* VGA_NO_FONT_LOADING */
 1381     return ENODEV;
 1382 #endif /* VGA_NO_FONT_LOADING */
 1383 }
 1384 
 1385 /*
 1386  * save_palette():
 1387  * Read DAC values. The values have expressed in 8 bits.
 1388  *
 1389  * VGA
 1390  */
 1391 static int
 1392 vga_save_palette(video_adapter_t *adp, u_char *palette)
 1393 {
 1394     int i;
 1395 
 1396     prologue(adp, V_ADP_PALETTE, ENODEV);
 1397 
 1398     /* 
 1399      * We store 8 bit values in the palette buffer, while the standard
 1400      * VGA has 6 bit DAC .
 1401      */
 1402     outb(PALRADR, 0x00);
 1403     for (i = 0; i < 256*3; ++i)
 1404         palette[i] = inb(PALDATA) << 2; 
 1405     inb(CRTC + 6);              /* reset flip/flop */
 1406     return 0;
 1407 }
 1408 
 1409 static int
 1410 vga_save_palette2(video_adapter_t *adp, int base, int count,
 1411                   u_char *r, u_char *g, u_char *b)
 1412 {
 1413     int i;
 1414 
 1415     prologue(adp, V_ADP_PALETTE, ENODEV);
 1416 
 1417     outb(PALRADR, base);
 1418     for (i = 0; i < count; ++i) {
 1419         r[i] = inb(PALDATA) << 2; 
 1420         g[i] = inb(PALDATA) << 2; 
 1421         b[i] = inb(PALDATA) << 2; 
 1422     }
 1423     inb(CRTC + 6);              /* reset flip/flop */
 1424     return 0;
 1425 }
 1426 
 1427 /*
 1428  * load_palette():
 1429  * Set DAC values.
 1430  *
 1431  * VGA
 1432  */
 1433 static int
 1434 vga_load_palette(video_adapter_t *adp, const u_char *palette)
 1435 {
 1436     int i;
 1437 
 1438     prologue(adp, V_ADP_PALETTE, ENODEV);
 1439 
 1440     outb(PIXMASK, 0xff);                /* no pixelmask */
 1441     outb(PALWADR, 0x00);
 1442     for (i = 0; i < 256*3; ++i)
 1443         outb(PALDATA, palette[i] >> 2);
 1444     inb(CRTC + 6);                      /* reset flip/flop */
 1445     outb(ATC, 0x20);                    /* enable palette */
 1446     return 0;
 1447 }
 1448 
 1449 static int
 1450 vga_load_palette2(video_adapter_t *adp, int base, int count,
 1451                   u_char *r, u_char *g, u_char *b)
 1452 {
 1453     int i;
 1454 
 1455     prologue(adp, V_ADP_PALETTE, ENODEV);
 1456 
 1457     outb(PIXMASK, 0xff);                /* no pixelmask */
 1458     outb(PALWADR, base);
 1459     for (i = 0; i < count; ++i) {
 1460         outb(PALDATA, r[i] >> 2);
 1461         outb(PALDATA, g[i] >> 2);
 1462         outb(PALDATA, b[i] >> 2);
 1463     }
 1464     inb(CRTC + 6);                      /* reset flip/flop */
 1465     outb(ATC, 0x20);                    /* enable palette */
 1466     return 0;
 1467 }
 1468 
 1469 /*
 1470  * set_border():
 1471  * Change the border color.
 1472  */
 1473 static int
 1474 vga_set_border(video_adapter_t *adp, int color)
 1475 {
 1476     prologue(adp, V_ADP_BORDER, ENODEV);
 1477 
 1478     inb(CRTC + 6);      /* reset flip-flop */
 1479     outb(ATC, 0x31); outb(ATC, color & 0xff); 
 1480 
 1481     return 0;
 1482 }
 1483 
 1484 /*
 1485  * save_state():
 1486  * Read video register values.
 1487  * NOTE: this function only reads the standard VGA registers.
 1488  * any extra/extended registers of SVGA adapters are not saved.
 1489  */
 1490 static int
 1491 vga_save_state(video_adapter_t *adp, void *p, size_t size)
 1492 {
 1493     video_info_t info;
 1494     u_char *buf;
 1495     int crtc_addr;
 1496     int i, j;
 1497 
 1498     if (size == 0) {
 1499         /* return the required buffer size */
 1500         prologue(adp, V_ADP_STATESAVE, 0);
 1501         return sizeof(adp_state_t);
 1502     } else {
 1503         prologue(adp, V_ADP_STATESAVE, ENODEV);
 1504         if (size < sizeof(adp_state_t))
 1505             return EINVAL;
 1506     }
 1507     ((adp_state_t *)p)->sig = V_STATE_SIG;
 1508     buf = ((adp_state_t *)p)->regs;
 1509     bzero(buf, V_MODE_PARAM_SIZE);
 1510     crtc_addr = CRTC;
 1511 
 1512     crit_enter();
 1513 
 1514     outb(TSIDX, 0x00); outb(TSREG, 0x01);       /* stop sequencer */
 1515     for (i = 0, j = 5; i < 4; i++) {           
 1516         outb(TSIDX, i + 1);
 1517         buf[j++]  =  inb(TSREG);
 1518     }
 1519     buf[9]  =  inb(MISC + 10);                  /* dot-clock */
 1520     outb(TSIDX, 0x00); outb(TSREG, 0x03);       /* start sequencer */
 1521 
 1522     for (i = 0, j = 10; i < 25; i++) {          /* crtc */
 1523         outb(crtc_addr, i);
 1524         buf[j++]  =  inb(crtc_addr + 1);
 1525     }
 1526     for (i = 0, j = 35; i < 20; i++) {          /* attribute ctrl */
 1527         inb(crtc_addr + 6);                     /* reset flip-flop */
 1528         outb(ATC, i);
 1529         buf[j++]  =  inb(ATC + 1);
 1530     }
 1531     for (i = 0, j = 55; i < 9; i++) {           /* graph data ctrl */
 1532         outb(GDCIDX, i);
 1533         buf[j++]  =  inb(GDCREG);
 1534     }
 1535     inb(crtc_addr + 6);                         /* reset flip-flop */
 1536     outb(ATC, 0x20);                            /* enable palette */
 1537 
 1538     crit_exit();
 1539 
 1540 #if 1
 1541     if (vga_get_info(adp, adp->va_mode, &info) == 0) {
 1542         if (info.vi_flags & V_INFO_GRAPHICS) {
 1543             buf[0] = info.vi_width/info.vi_cwidth; /* COLS */
 1544             buf[1] = info.vi_height/info.vi_cheight - 1; /* ROWS */
 1545         } else {
 1546             buf[0] = info.vi_width;             /* COLS */
 1547             buf[1] = info.vi_height - 1;        /* ROWS */
 1548         }
 1549         buf[2] = info.vi_cheight;               /* POINTS */
 1550     } else {
 1551         /* XXX: shouldn't be happening... */
 1552         kprintf("vga%d: %s: failed to obtain mode info. (vga_save_state())\n",
 1553                adp->va_unit, adp->va_name);
 1554     }
 1555 #else
 1556     buf[0] = readb(BIOS_PADDRTOVADDR(0x44a));   /* COLS */
 1557     buf[1] = readb(BIOS_PADDRTOVADDR(0x484));   /* ROWS */
 1558     buf[2] = readb(BIOS_PADDRTOVADDR(0x485));   /* POINTS */
 1559     buf[3] = readb(BIOS_PADDRTOVADDR(0x44c));
 1560     buf[4] = readb(BIOS_PADDRTOVADDR(0x44d));
 1561 #endif
 1562 
 1563     return 0;
 1564 }
 1565 
 1566 /*
 1567  * load_state():
 1568  * Set video registers at once.
 1569  * NOTE: this function only updates the standard VGA registers.
 1570  * any extra/extended registers of SVGA adapters are not changed.
 1571  */
 1572 static int
 1573 vga_load_state(video_adapter_t *adp, void *p)
 1574 {
 1575     u_char *buf;
 1576     int crtc_addr;
 1577     int i;
 1578 
 1579     prologue(adp, V_ADP_STATELOAD, ENODEV);
 1580     if (((adp_state_t *)p)->sig != V_STATE_SIG)
 1581         return EINVAL;
 1582 
 1583     buf = ((adp_state_t *)p)->regs;
 1584     crtc_addr = CRTC;
 1585 
 1586 #if VGA_DEBUG > 1
 1587     hexdump(buf, V_MODE_PARAM_SIZE, NULL, HD_OMIT_CHARS | HD_OMIT_COUNT);
 1588 #endif
 1589 
 1590     crit_enter();
 1591 
 1592     outb(TSIDX, 0x00); outb(TSREG, 0x01);       /* stop sequencer */
 1593     for (i = 0; i < 4; ++i) {                   /* program sequencer */
 1594         outb(TSIDX, i + 1);
 1595         outb(TSREG, buf[i + 5]);
 1596     }
 1597     outb(MISC, buf[9]);                         /* set dot-clock */
 1598     outb(TSIDX, 0x00); outb(TSREG, 0x03);       /* start sequencer */
 1599     outb(crtc_addr, 0x11);
 1600     outb(crtc_addr + 1, inb(crtc_addr + 1) & 0x7F);
 1601     for (i = 0; i < 25; ++i) {                  /* program crtc */
 1602         outb(crtc_addr, i);
 1603         outb(crtc_addr + 1, buf[i + 10]);
 1604     }
 1605     inb(crtc_addr+6);                           /* reset flip-flop */
 1606     for (i = 0; i < 20; ++i) {                  /* program attribute ctrl */
 1607         outb(ATC, i);
 1608         outb(ATC, buf[i + 35]);
 1609     }
 1610     for (i = 0; i < 9; ++i) {                   /* program graph data ctrl */
 1611         outb(GDCIDX, i);
 1612         outb(GDCREG, buf[i + 55]);
 1613     }
 1614     inb(crtc_addr + 6);                         /* reset flip-flop */
 1615     outb(ATC, 0x20);                            /* enable palette */
 1616 
 1617 #if 0 /* XXX a temporary workaround for kernel panic */
 1618 #ifndef VGA_NO_BIOS
 1619     if (adp->va_unit == V_ADP_PRIMARY) {
 1620         writeb(BIOS_PADDRTOVADDR(0x44a), buf[0]);       /* COLS */
 1621         writeb(BIOS_PADDRTOVADDR(0x484), buf[1] + rows_offset - 1); /* ROWS */
 1622         writeb(BIOS_PADDRTOVADDR(0x485), buf[2]);       /* POINTS */
 1623 #if 0
 1624         writeb(BIOS_PADDRTOVADDR(0x44c), buf[3]);
 1625         writeb(BIOS_PADDRTOVADDR(0x44d), buf[4]);
 1626 #endif
 1627     }
 1628 #endif /* VGA_NO_BIOS */
 1629 #endif /* XXX */
 1630 
 1631     crit_exit();
 1632     return 0;
 1633 }
 1634 
 1635 /*
 1636  * set_origin():
 1637  * Change the origin (window mapping) of the banked frame buffer.
 1638  */
 1639 static int
 1640 vga_set_origin(video_adapter_t *adp, off_t offset)
 1641 {
 1642     /* 
 1643      * The standard video modes do not require window mapping; 
 1644      * always return error.
 1645      */
 1646     return ENODEV;
 1647 }
 1648 
 1649 /*
 1650  * read_hw_cursor():
 1651  * Read the position of the hardware text cursor.
 1652  */
 1653 static int
 1654 vga_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
 1655 {
 1656     u_int16_t off;
 1657 
 1658     if (!vga_init_done)
 1659         return ENXIO;
 1660 
 1661     if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
 1662         return ENODEV;
 1663 
 1664     crit_enter();
 1665     outb(CRTC, 14);
 1666     off = inb(CRTC + 1);
 1667     outb(CRTC, 15);
 1668     off = (off << 8) | inb(CRTC + 1);
 1669     crit_exit();
 1670 
 1671     *row = off / adp->va_info.vi_width;
 1672     *col = off % adp->va_info.vi_width;
 1673 
 1674     return 0;
 1675 }
 1676 
 1677 /*
 1678  * set_hw_cursor():
 1679  * Move the hardware text cursor.  If col and row are both -1, 
 1680  * the cursor won't be shown.
 1681  */
 1682 static int
 1683 vga_set_hw_cursor(video_adapter_t *adp, int col, int row)
 1684 {
 1685     u_int16_t off;
 1686 
 1687     if (!vga_init_done)
 1688         return ENXIO;
 1689 
 1690     if ((col == -1) && (row == -1)) {
 1691         off = -1;
 1692     } else {
 1693         if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
 1694             return ENODEV;
 1695         off = row*adp->va_info.vi_width + col;
 1696     }
 1697 
 1698     crit_enter();
 1699     outb(CRTC, 14);
 1700     outb(CRTC + 1, off >> 8);
 1701     outb(CRTC, 15);
 1702     outb(CRTC + 1, off & 0x00ff);
 1703     crit_exit();
 1704 
 1705     return 0;
 1706 }
 1707 
 1708 /*
 1709  * set_hw_cursor_shape():
 1710  * Change the shape of the hardware text cursor. If the height is
 1711  * zero or negative, the cursor won't be shown.
 1712  */
 1713 static int
 1714 vga_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
 1715                         int celsize, int blink)
 1716 {
 1717     if (!vga_init_done)
 1718         return ENXIO;
 1719 
 1720     crit_enter();
 1721     if (height <= 0) {
 1722         /* make the cursor invisible */
 1723         outb(CRTC, 10);
 1724         outb(CRTC + 1, 32);
 1725         outb(CRTC, 11);
 1726         outb(CRTC + 1, 0);
 1727     } else {
 1728         outb(CRTC, 10);
 1729         outb(CRTC + 1, celsize - base - height);
 1730         outb(CRTC, 11);
 1731         outb(CRTC + 1, celsize - base - 1);
 1732     }
 1733     crit_exit();
 1734 
 1735     return 0;
 1736 }
 1737 
 1738 /*
 1739  * blank_display()
 1740  * Put the display in power save/power off mode.
 1741  */
 1742 static int
 1743 vga_blank_display(video_adapter_t *adp, int mode)
 1744 {
 1745     u_char val;
 1746 
 1747     crit_enter();
 1748     switch (mode) {
 1749     case V_DISPLAY_SUSPEND:
 1750     case V_DISPLAY_STAND_BY:
 1751         outb(TSIDX, 0x01);
 1752         val = inb(TSREG);
 1753         outb(TSIDX, 0x01);
 1754         outb(TSREG, val | 0x20);
 1755         outb(CRTC, 0x17);
 1756         val = inb(CRTC + 1);
 1757         outb(CRTC + 1, val & ~0x80);
 1758         break;
 1759     case V_DISPLAY_OFF:
 1760         outb(TSIDX, 0x01);
 1761         val = inb(TSREG);
 1762         outb(TSIDX, 0x01);
 1763         outb(TSREG, val | 0x20);
 1764         break;
 1765     case V_DISPLAY_ON:
 1766         outb(TSIDX, 0x01);
 1767         val = inb(TSREG);
 1768         outb(TSIDX, 0x01);
 1769         outb(TSREG, val & 0xDF);
 1770         outb(CRTC, 0x17);
 1771         val = inb(CRTC + 1);
 1772         outb(CRTC + 1, val | 0x80);
 1773         break;
 1774     }
 1775     crit_exit();
 1776 
 1777     return 0;
 1778 }
 1779 
 1780 /*
 1781  * mmap():
 1782  * Mmap frame buffer.
 1783  */
 1784 static int
 1785 vga_mmap_buf(video_adapter_t *adp, vm_offset_t offset, int prot)
 1786 {
 1787     if (adp->va_info.vi_flags & V_INFO_LINEAR)
 1788         return -1;
 1789 
 1790 #if VGA_DEBUG > 0
 1791     kprintf("vga_mmap_buf(): window:0x%x, offset:%p\n",
 1792            adp->va_info.vi_window, (void *)offset);
 1793 #endif
 1794 
 1795     /* XXX: is this correct? */
 1796     if (offset > adp->va_window_size - PAGE_SIZE)
 1797         return -1;
 1798 
 1799 #if defined(__i386__)
 1800     return i386_btop(adp->va_info.vi_window + offset);
 1801 #elif defined(__x86_64__)
 1802     return x86_64_btop(adp->va_info.vi_window + offset);
 1803 #else
 1804 #error "vga_mmap_buf needs to return something"
 1805 #endif
 1806 }
 1807 
 1808 #ifndef VGA_NO_MODE_CHANGE
 1809 
 1810 static void
 1811 planar_fill(video_adapter_t *adp, int val)
 1812 {
 1813     int length;
 1814     int at;                     /* position in the frame buffer */
 1815     int l;
 1816 
 1817     lwkt_gettoken(&tty_token);
 1818     outw(GDCIDX, 0x0005);               /* read mode 0, write mode 0 */
 1819     outw(GDCIDX, 0x0003);               /* data rotate/function select */
 1820     outw(GDCIDX, 0x0f01);               /* set/reset enable */
 1821     outw(GDCIDX, 0xff08);               /* bit mask */
 1822     outw(GDCIDX, (val << 8) | 0x00);    /* set/reset */
 1823     at = 0;
 1824     length = adp->va_line_width*adp->va_info.vi_height;
 1825     while (length > 0) {
 1826         l = imin(length, adp->va_window_size);
 1827         (*vidsw[adp->va_index]->set_win_org)(adp, at);
 1828         bzero_io(adp->va_window, l);
 1829         length -= l;
 1830         at += l;
 1831     }
 1832     outw(GDCIDX, 0x0000);               /* set/reset */
 1833     outw(GDCIDX, 0x0001);               /* set/reset enable */
 1834     lwkt_reltoken(&tty_token);
 1835 }
 1836 
 1837 static void
 1838 packed_fill(video_adapter_t *adp, int val)
 1839 {
 1840     int length;
 1841     int at;                     /* position in the frame buffer */
 1842     int l;
 1843 
 1844     lwkt_gettoken(&tty_token);
 1845     at = 0;
 1846     length = adp->va_line_width*adp->va_info.vi_height;
 1847     while (length > 0) {
 1848         l = imin(length, adp->va_window_size);
 1849         (*vidsw[adp->va_index]->set_win_org)(adp, at);
 1850         fill_io(val, adp->va_window, l);
 1851         length -= l;
 1852         at += l;
 1853     }
 1854     lwkt_reltoken(&tty_token);
 1855 }
 1856 
 1857 static void
 1858 direct_fill(video_adapter_t *adp, int val)
 1859 {
 1860     int length;
 1861     int at;                     /* position in the frame buffer */
 1862     int l;
 1863 
 1864     lwkt_gettoken(&tty_token);
 1865     at = 0;
 1866     length = adp->va_line_width*adp->va_info.vi_height;
 1867     while (length > 0) {
 1868         l = imin(length, adp->va_window_size);
 1869         (*vidsw[adp->va_index]->set_win_org)(adp, at);
 1870         switch (adp->va_info.vi_pixel_size) {
 1871         case sizeof(u_int16_t):
 1872             fillw_io(val, adp->va_window, l/sizeof(u_int16_t));
 1873             break;
 1874         case 3:
 1875             /* FIXME */
 1876             break;
 1877         case sizeof(u_int32_t):
 1878             filll_io(val, adp->va_window, l/sizeof(u_int32_t));
 1879             break;
 1880         }
 1881         length -= l;
 1882         at += l;
 1883     }
 1884     lwkt_reltoken(&tty_token);
 1885 }
 1886 
 1887 static int
 1888 vga_clear(video_adapter_t *adp)
 1889 {
 1890     switch (adp->va_info.vi_mem_model) {
 1891     case V_INFO_MM_TEXT:
 1892         /* do nothing? XXX */
 1893         break;
 1894     case V_INFO_MM_PLANAR:
 1895         planar_fill(adp, 0);
 1896         break;
 1897     case V_INFO_MM_PACKED:
 1898         packed_fill(adp, 0);
 1899         break;
 1900     case V_INFO_MM_DIRECT:
 1901         direct_fill(adp, 0);
 1902         break;
 1903     }
 1904     return 0;
 1905 }
 1906 
 1907 #ifdef notyet
 1908 static void
 1909 planar_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 1910 {
 1911     int banksize;
 1912     int bank;
 1913     int pos;
 1914     int offset;                 /* offset within window */
 1915     int bx;
 1916     int l;
 1917 
 1918     lwkt_gettoken(&tty_token);
 1919     outw(GDCIDX, 0x0005);               /* read mode 0, write mode 0 */
 1920     outw(GDCIDX, 0x0003);               /* data rotate/function select */
 1921     outw(GDCIDX, 0x0f01);               /* set/reset enable */
 1922     outw(GDCIDX, 0xff08);               /* bit mask */
 1923     outw(GDCIDX, (val << 8) | 0x00); /* set/reset */
 1924 
 1925     banksize = adp->va_window_size;
 1926     bank = -1;
 1927     while (cy > 0) {
 1928         pos = adp->va_line_width*y + x/8;
 1929         if (bank != pos/banksize) {
 1930             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 1931             bank = pos/banksize;
 1932         }
 1933         offset = pos%banksize;
 1934         bx = (x + cx)/8 - x/8;
 1935         if (x % 8) {
 1936             outw(GDCIDX, ((0xff00 >> (x % 8)) & 0xff00) | 0x08);
 1937             writeb(adp->va_window + offset, 0);
 1938             ++offset;
 1939             --bx;
 1940             if (offset >= banksize) {
 1941                 offset = 0;
 1942                 ++bank;         /* next bank */
 1943                 (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 1944             }
 1945             outw(GDCIDX, 0xff08);       /* bit mask */
 1946         }
 1947         while (bx > 0) {
 1948             l = imin(bx, banksize);
 1949             bzero_io(adp->va_window + offset, l);
 1950             offset += l;
 1951             bx -= l;
 1952             if (offset >= banksize) {
 1953                 offset = 0;
 1954                 ++bank;         /* next bank */
 1955                 (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 1956             }
 1957         }
 1958         if ((x + cx) % 8) {
 1959             outw(GDCIDX, (~(0xff00 >> ((x + cx) % 8)) & 0xff00) | 0x08);
 1960             writeb(adp->va_window + offset, 0);
 1961             ++offset;
 1962             if (offset >= banksize) {
 1963                 offset = 0;
 1964                 ++bank;         /* next bank */
 1965                 (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 1966             }
 1967             outw(GDCIDX, 0xff08);       /* bit mask */
 1968         }
 1969         ++y;
 1970         --cy;
 1971     }
 1972 
 1973     outw(GDCIDX, 0xff08);               /* bit mask */
 1974     outw(GDCIDX, 0x0000);               /* set/reset */
 1975     outw(GDCIDX, 0x0001);               /* set/reset enable */
 1976     lwkt_reltoken(&tty_token);
 1977 }
 1978 
 1979 static void
 1980 packed_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 1981 {
 1982     int banksize;
 1983     int bank;
 1984     int pos;
 1985     int offset;                 /* offset within window */
 1986     int end;
 1987 
 1988     lwkt_gettoken(&tty_token);
 1989     banksize = adp->va_window_size;
 1990     bank = -1;
 1991     cx *= adp->va_info.vi_pixel_size;
 1992     while (cy > 0) {
 1993         pos = adp->va_line_width*y + x*adp->va_info.vi_pixel_size;
 1994         if (bank != pos/banksize) {
 1995             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 1996             bank = pos/banksize;
 1997         }
 1998         offset = pos%banksize;
 1999         end = imin(offset + cx, banksize);
 2000         fill_io(val, adp->va_window + offset,
 2001                 (end - offset)/adp->va_info.vi_pixel_size);
 2002         /* the line may cross the window boundary */
 2003         if (offset + cx > banksize) {
 2004             ++bank;             /* next bank */
 2005             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2006             end = offset + cx - banksize;
 2007             fill_io(val, adp->va_window, end/adp->va_info.vi_pixel_size);
 2008         }
 2009         ++y;
 2010         --cy;
 2011     }
 2012     lwkt_reltoken(&tty_token);
 2013 }
 2014 
 2015 static void
 2016 direct_fill_rect16(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2017 {
 2018     int banksize;
 2019     int bank;
 2020     int pos;
 2021     int offset;                 /* offset within window */
 2022     int end;
 2023 
 2024     lwkt_gettoken(&tty_token);
 2025     /*
 2026      * XXX: the function assumes that banksize is a muliple of
 2027      * sizeof(u_int16_t).
 2028      */
 2029     banksize = adp->va_window_size;
 2030     bank = -1;
 2031     cx *= sizeof(u_int16_t);
 2032     while (cy > 0) {
 2033         pos = adp->va_line_width*y + x*sizeof(u_int16_t);
 2034         if (bank != pos/banksize) {
 2035             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2036             bank = pos/banksize;
 2037         }
 2038         offset = pos%banksize;
 2039         end = imin(offset + cx, banksize);
 2040         fillw_io(val, adp->va_window + offset,
 2041                  (end - offset)/sizeof(u_int16_t));
 2042         /* the line may cross the window boundary */
 2043         if (offset + cx > banksize) {
 2044             ++bank;             /* next bank */
 2045             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2046             end = offset + cx - banksize;
 2047             fillw_io(val, adp->va_window, end/sizeof(u_int16_t));
 2048         }
 2049         ++y;
 2050         --cy;
 2051     }
 2052     lwkt_reltoken(&tty_token);
 2053 }
 2054 
 2055 static void
 2056 direct_fill_rect24(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2057 {
 2058     int banksize;
 2059     int bank;
 2060     int pos;
 2061     int offset;                 /* offset within window */
 2062     int end;
 2063     int i;
 2064     int j;
 2065     u_int8_t b[3];
 2066 
 2067     lwkt_gettoken(&tty_token);
 2068     b[0] = val & 0x0000ff;
 2069     b[1] = (val >> 8) & 0x0000ff;
 2070     b[2] = (val >> 16) & 0x0000ff;
 2071     banksize = adp->va_window_size;
 2072     bank = -1;
 2073     cx *= 3;
 2074     while (cy > 0) {
 2075         pos = adp->va_line_width*y + x*3;
 2076         if (bank != pos/banksize) {
 2077             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2078             bank = pos/banksize;
 2079         }
 2080         offset = pos%banksize;
 2081         end = imin(offset + cx, banksize);
 2082         for (i = 0, j = offset; j < end; i = (++i)%3, ++j) {
 2083             writeb(adp->va_window + j, b[i]);
 2084         }
 2085         /* the line may cross the window boundary */
 2086         if (offset + cx >= banksize) {
 2087             ++bank;             /* next bank */
 2088             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2089             j = 0;
 2090             end = offset + cx - banksize;
 2091             for (; j < end; i = (++i)%3, ++j) {
 2092                 writeb(adp->va_window + j, b[i]);
 2093             }
 2094         }
 2095         ++y;
 2096         --cy;
 2097     }
 2098     lwkt_reltoken(&tty_token);
 2099 }
 2100 
 2101 static void
 2102 direct_fill_rect32(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2103 {
 2104     int banksize;
 2105     int bank;
 2106     int pos;
 2107     int offset;                 /* offset within window */
 2108     int end;
 2109 
 2110     lwkt_gettoken(&tty_token);
 2111     /*
 2112      * XXX: the function assumes that banksize is a muliple of
 2113      * sizeof(u_int32_t).
 2114      */
 2115     banksize = adp->va_window_size;
 2116     bank = -1;
 2117     cx *= sizeof(u_int32_t);
 2118     while (cy > 0) {
 2119         pos = adp->va_line_width*y + x*sizeof(u_int32_t);
 2120         if (bank != pos/banksize) {
 2121             (*vidsw[adp->va_index]->set_win_org)(adp, pos);
 2122             bank = pos/banksize;
 2123         }
 2124         offset = pos%banksize;
 2125         end = imin(offset + cx, banksize);
 2126         filll_io(val, adp->va_window + offset,
 2127                  (end - offset)/sizeof(u_int32_t));
 2128         /* the line may cross the window boundary */
 2129         if (offset + cx > banksize) {
 2130             ++bank;             /* next bank */
 2131             (*vidsw[adp->va_index]->set_win_org)(adp, bank*banksize);
 2132             end = offset + cx - banksize;
 2133             filll_io(val, adp->va_window, end/sizeof(u_int32_t));
 2134         }
 2135         ++y;
 2136         --cy;
 2137     }
 2138     lwkt_reltoken(&tty_token);
 2139 }
 2140 
 2141 static int
 2142 vga_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2143 {
 2144     switch (adp->va_info.vi_mem_model) {
 2145     case V_INFO_MM_TEXT:
 2146         /* do nothing? XXX */
 2147         break;
 2148     case V_INFO_MM_PLANAR:
 2149         planar_fill_rect(adp, val, x, y, cx, cy);
 2150         break;
 2151     case V_INFO_MM_PACKED:
 2152         packed_fill_rect(adp, val, x, y, cx, cy);
 2153         break;
 2154     case V_INFO_MM_DIRECT:
 2155         switch (adp->va_info.vi_pixel_size) {
 2156         case sizeof(u_int16_t):
 2157             direct_fill_rect16(adp, val, x, y, cx, cy);
 2158             break;
 2159         case 3:
 2160             direct_fill_rect24(adp, val, x, y, cx, cy);
 2161             break;
 2162         case sizeof(u_int32_t):
 2163             direct_fill_rect32(adp, val, x, y, cx, cy);
 2164             break;
 2165         }
 2166         break;
 2167     }
 2168     return 0;
 2169 }
 2170 #else /* !notyet */
 2171 static int
 2172 vga_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
 2173 {
 2174     return ENODEV;
 2175 }
 2176 #endif /* notyet */
 2177 
 2178 static int
 2179 vga_bitblt(video_adapter_t *adp,...)
 2180 {
 2181     /* FIXME */
 2182     return ENODEV;
 2183 }
 2184 
 2185 #endif /* !VGA_NO_MODE_CHANGE */
 2186 
 2187 static int
 2188 get_palette(video_adapter_t *adp, int base, int count,
 2189             u_char *red, u_char *green, u_char *blue, u_char *trans)
 2190 {
 2191     u_char *r;
 2192     u_char *g;
 2193     u_char *b;
 2194 
 2195     if (count < 0 || base < 0 || count > 256 || base > 256 ||
 2196         base + count > 256)
 2197         return EINVAL;
 2198 
 2199     r = kmalloc(count*3, M_DEVBUF, M_WAITOK);
 2200     g = r + count;
 2201     b = g + count;
 2202     if (vga_save_palette2(adp, base, count, r, g, b)) {
 2203         kfree(r, M_DEVBUF);
 2204         return ENODEV;
 2205     }
 2206     copyout(r, red, count);
 2207     copyout(g, green, count);
 2208     copyout(b, blue, count);
 2209     if (trans != NULL) {
 2210         bzero(r, count);
 2211         copyout(r, trans, count);
 2212     }
 2213     kfree(r, M_DEVBUF);
 2214 
 2215     return 0;
 2216 }
 2217 
 2218 static int
 2219 set_palette(video_adapter_t *adp, int base, int count,
 2220             u_char *red, u_char *green, u_char *blue, u_char *trans)
 2221 {
 2222     u_char *r;
 2223     u_char *g;
 2224     u_char *b;
 2225     int err;
 2226 
 2227     if (count < 0 || base < 0 || count > 256 || base > 256 ||
 2228         base + count > 256)
 2229         return EINVAL;
 2230 
 2231     r = kmalloc(count*3, M_DEVBUF, M_WAITOK);
 2232     g = r + count;
 2233     b = g + count;
 2234     err = copyin(red, r, count);
 2235     if (!err)
 2236         err = copyin(green, g, count);
 2237     if (!err)
 2238         err = copyin(blue, b, count);
 2239     if (!err)
 2240         err = vga_load_palette2(adp, base, count, r, g, b);
 2241     kfree(r, M_DEVBUF);
 2242 
 2243     return (err ? ENODEV : 0);
 2244 }
 2245 
 2246 static int
 2247 vga_dev_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
 2248 {
 2249     switch (cmd) {
 2250     case FBIO_GETWINORG:        /* get frame buffer window origin */
 2251         *(u_int *)arg = 0;
 2252         return 0;
 2253 
 2254     case FBIO_SETWINORG:        /* set frame buffer window origin */
 2255         return ENODEV;
 2256 
 2257     case FBIO_SETDISPSTART:     /* set display start address */
 2258         return (set_display_start(adp, 
 2259                                   ((video_display_start_t *)arg)->x,
 2260                                   ((video_display_start_t *)arg)->y)
 2261                 ? ENODEV : 0);
 2262 
 2263     case FBIO_SETLINEWIDTH:     /* set scan line length in pixel */
 2264         return (set_line_length(adp, *(u_int *)arg) ? ENODEV : 0);
 2265 
 2266     case FBIO_GETPALETTE:       /* get color palette */
 2267         return get_palette(adp, ((video_color_palette_t *)arg)->index,
 2268                            ((video_color_palette_t *)arg)->count,
 2269                            ((video_color_palette_t *)arg)->red,
 2270                            ((video_color_palette_t *)arg)->green,
 2271                            ((video_color_palette_t *)arg)->blue,
 2272                            ((video_color_palette_t *)arg)->transparent);
 2273 
 2274     case FBIO_SETPALETTE:       /* set color palette */
 2275         return set_palette(adp, ((video_color_palette_t *)arg)->index,
 2276                            ((video_color_palette_t *)arg)->count,
 2277                            ((video_color_palette_t *)arg)->red,
 2278                            ((video_color_palette_t *)arg)->green,
 2279                            ((video_color_palette_t *)arg)->blue,
 2280                            ((video_color_palette_t *)arg)->transparent);
 2281 
 2282     case FBIOGTYPE:             /* get frame buffer type info. */
 2283         ((struct fbtype *)arg)->fb_type = fb_type(adp->va_type);
 2284         ((struct fbtype *)arg)->fb_height = adp->va_info.vi_height;
 2285         ((struct fbtype *)arg)->fb_width = adp->va_info.vi_width;
 2286         ((struct fbtype *)arg)->fb_depth = adp->va_info.vi_depth;
 2287         if ((adp->va_info.vi_depth <= 1) || (adp->va_info.vi_depth > 8))
 2288             ((struct fbtype *)arg)->fb_cmsize = 0;
 2289         else
 2290             ((struct fbtype *)arg)->fb_cmsize = 1 << adp->va_info.vi_depth;
 2291         ((struct fbtype *)arg)->fb_size = adp->va_buffer_size;
 2292         return 0;
 2293 
 2294     case FBIOGETCMAP:           /* get color palette */
 2295         return get_palette(adp, ((struct fbcmap *)arg)->index,
 2296                            ((struct fbcmap *)arg)->count,
 2297                            ((struct fbcmap *)arg)->red,
 2298                            ((struct fbcmap *)arg)->green,
 2299                            ((struct fbcmap *)arg)->blue, NULL);
 2300 
 2301     case FBIOPUTCMAP:           /* set color palette */
 2302         return set_palette(adp, ((struct fbcmap *)arg)->index,
 2303                            ((struct fbcmap *)arg)->count,
 2304                            ((struct fbcmap *)arg)->red,
 2305                            ((struct fbcmap *)arg)->green,
 2306                            ((struct fbcmap *)arg)->blue, NULL);
 2307 
 2308     default:
 2309         return fb_commonioctl(adp, cmd, arg);
 2310     }
 2311 }
 2312 
 2313 /*
 2314  * diag():
 2315  * Print some information about the video adapter and video modes,
 2316  * with requested level of details.
 2317  */
 2318 static int
 2319 vga_diag(video_adapter_t *adp, int level)
 2320 {
 2321     u_char *mp;
 2322 #if FB_DEBUG > 1
 2323     video_info_t info;
 2324     int i;
 2325 #endif
 2326 
 2327     if (!vga_init_done)
 2328         return ENXIO;
 2329 
 2330 #if FB_DEBUG > 1
 2331 #ifndef VGA_NO_BIOS
 2332     kprintf("vga: DCC code:0x%02x\n",
 2333         readb(BIOS_PADDRTOVADDR(0x488)));
 2334     kprintf("vga: CRTC:0x%x, video option:0x%02x, ",
 2335         readw(BIOS_PADDRTOVADDR(0x463)),
 2336         readb(BIOS_PADDRTOVADDR(0x487)));
 2337     kprintf("rows:%d, cols:%d, font height:%d\n",
 2338         readb(BIOS_PADDRTOVADDR(0x44a)),
 2339         readb(BIOS_PADDRTOVADDR(0x484)) + 1,
 2340         readb(BIOS_PADDRTOVADDR(0x485)));
 2341 #endif /* VGA_NO_BIOS */
 2342 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
 2343     kprintf("vga: param table:%p\n", video_mode_ptr);
 2344     kprintf("vga: rows_offset:%d\n", rows_offset);
 2345 #endif
 2346 #endif /* FB_DEBUG > 1 */
 2347 
 2348     fb_dump_adp_info(VGA_DRIVER_NAME, adp, level);
 2349 
 2350 #if FB_DEBUG > 1
 2351     if (adp->va_flags & V_ADP_MODECHANGE) {
 2352         for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
 2353             if (bios_vmode[i].vi_mode == NA)
 2354                 continue;
 2355             if (get_mode_param(bios_vmode[i].vi_mode) == NULL)
 2356                 continue;
 2357             fb_dump_mode_info(VGA_DRIVER_NAME, adp, &bios_vmode[i], level);
 2358         }
 2359     } else {
 2360         vga_get_info(adp, adp->va_initial_mode, &info); /* shouldn't fail */
 2361         fb_dump_mode_info(VGA_DRIVER_NAME, adp, &info, level);
 2362     }
 2363 #endif /* FB_DEBUG > 1 */
 2364 
 2365 #if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
 2366     if (video_mode_ptr == NULL)
 2367         kprintf("vga%d: %s: WARNING: video mode switching is not "
 2368                "fully supported on this adapter\n",
 2369                adp->va_unit, adp->va_name);
 2370 #endif
 2371     if (level <= 0)
 2372         return 0;
 2373 
 2374     kprintf("VGA parameters upon power-up\n");
 2375     hexdump(adpstate.regs, sizeof(adpstate.regs), NULL,
 2376         HD_OMIT_CHARS | HD_OMIT_COUNT);
 2377 
 2378     mp = get_mode_param(adp->va_initial_mode);
 2379     if (mp == NULL)     /* this shouldn't be happening */
 2380         return 0;
 2381     kprintf("VGA parameters in BIOS for mode %d\n", adp->va_initial_mode);
 2382     hexdump(adpstate2.regs, sizeof(adpstate2.regs), NULL,
 2383         HD_OMIT_CHARS | HD_OMIT_COUNT);
 2384     kprintf("VGA parameters to be used for mode %d\n", adp->va_initial_mode);
 2385     hexdump(mp, V_MODE_PARAM_SIZE, NULL, HD_OMIT_CHARS | HD_OMIT_COUNT);
 2386 
 2387     return 0;
 2388 }

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