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/*

 * selection.h

 *

 * Interface between console.c, tty_io.c, vt.c, vc_screen.c and selection.c

 */

extern int sel_cons;

extern void clear_selection(void);

extern int set_selection(const unsigned long arg, struct tty_struct *tty, int user);

extern int paste_selection(struct tty_struct *tty);

extern int sel_loadlut(const unsigned long arg);

extern int mouse_reporting(void);

extern void mouse_report(struct tty_struct * tty, int butt, int mrx, int mry);

extern unsigned long video_num_columns;

extern unsigned long video_num_lines;

extern unsigned long video_size_row;

extern unsigned char video_type;

extern unsigned long video_mem_base;

extern unsigned long video_mem_term;

extern unsigned long video_screen_size;

extern unsigned short video_port_reg;

extern unsigned short video_port_val;

extern int console_blanked;

extern int can_do_color;

extern unsigned long video_font_height;

extern unsigned long video_scan_lines;

extern unsigned long default_font_height;

extern int video_font_is_default;

extern unsigned char color_table[];

extern int default_red[];

extern int default_grn[];

extern int default_blu[];

extern unsigned short __real_origin;

extern unsigned short __origin;

extern unsigned char has_wrapped;

extern unsigned short *vc_scrbuf[MAX_NR_CONSOLES];

extern void do_unblank_screen(void);

extern unsigned short *screen_pos(int currcons, int w_offset, int viewed);

extern unsigned short screen_word(int currcons, int offset, int viewed);

extern int scrw2glyph(unsigned short scr_word);

extern void complement_pos(int currcons, int offset);

extern void invert_screen(int currcons, int offset, int count, int shift);

#define reverse_video_char(a)   (((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77))

#define reverse_video_short(a)  (((a) & 0x88ff) | \

        (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4))

/* this latter line used to have masks 0xf000 and 0x0f00, but selection

   requires a self-inverse operation; moreover, the old version looks wrong */

extern void getconsxy(int currcons, char *p);

extern void putconsxy(int currcons, char *p);

/* how to access screen memory */

#include <linux/config.h>

#include <asm/io.h> 

#ifdef CONFIG_TGA_CONSOLE

# ifdef CONFIG_VGA_CONSOLE

extern const struct console_desc cons_devices[];

# endif

extern unsigned long video_mem_term;

int tga_blitc (unsigned int, unsigned long);

/*

 * TGA console screen memory access

 *

 * TGA is *not* a character/attribute cell device; font bitmaps must be rendered

 * to the screen pixels.

 *

 * The "unsigned short * addr" is *ALWAYS* a kernel virtual address, either

 * of the VC's backing store, or the "shadow screen" memory where the screen

 * contents are kept, as the TGA frame buffer is *not* char/attr cells.

 *

 * We must test for an Alpha kernel virtual address that falls within

 *  the "shadow screen" memory. This condition indicates we really want

 *  to write to the screen, so, we do... :-)

 *

 * NOTE also: there's only *TWO* operations: to put/get a character/attribute.

 *  All the others needed by VGA support go away, as Not Applicable for TGA.

 *

 * NOTE: "(long) addr < 0" tests for an Alpha kernel virtual address; this

 *  indicates a VC's backing store; otherwise, it's a bus memory address, for

 *  the VGA's screen memory, so we do the Alpha "swizzle"... :-)

 */

#define IS_VIDEO_MEMORY(a) \

        ((unsigned long)(a) - video_mem_base < video_mem_term - video_mem_base)

static inline void scr_writew(unsigned short val, unsigned short * addr)

{

        if ((long) addr < 0) {

        /*

                 * always deposit the char/attr, then see if it was to

                 * "screen" mem.

         * if so, then render the char/attr onto the real screen.

         */

        *addr = val;

                /*

                 * TGA might need the char blitted to the screen,

                 * but check first, we could be running on a VGA.

                 */

                if (tga_blitc && IS_VIDEO_MEMORY(addr))

                        tga_blitc(val, (unsigned long) addr);

        } else

                writew(val, (unsigned long) addr);

}

static inline unsigned short scr_readw(unsigned short * addr)

{

        if ((long) addr < 0)

        return *addr;

        return readw((unsigned long) addr);

}

/* scr_writeb and scr_readb are not expected to be called with a TGA */

static inline void scr_writeb(unsigned char val, unsigned char * addr)

{

        if ((long) addr < 0)

                *addr = val;

        else

                writeb(val, (unsigned long) addr);

}

static inline unsigned char scr_readb(unsigned char * addr)

{

        if ((long) addr < 0)

                return *addr;

        return readb((unsigned long) addr);

}

#else /* CONFIG_TGA_CONSOLE */

/*

 * normal VGA console access

 *

 */

#ifdef __alpha__

/*

 * NOTE: "(long) addr < 0" tests for an Alpha kernel virtual address; this

 *  indicates a VC's backing store; otherwise, it's a bus memory address, for

 *  the VGA's screen memory, so we do the Alpha "swizzle"... :-)

 */

static inline void scr_writeb(unsigned char val, unsigned char * addr)

{

        if ((long) addr < 0)

                *addr = val;

        else

                writeb(val, (unsigned long) addr);

}

static inline unsigned char scr_readb(unsigned char * addr)

{

        if ((long) addr < 0)

                return *addr;

        return readb((unsigned long) addr);

}

static inline void scr_writew(unsigned short val, unsigned short * addr)

{

        if ((long) addr < 0)

                *addr = val;

        else

                writew(val, (unsigned long) addr);

}

static inline unsigned short scr_readw(unsigned short * addr)

{

        if ((long) addr < 0)

                return *addr;

        return readw((unsigned long) addr);

}

#else /* __alpha__ */

/*

 * normal VGA console access

 *

 * NOTE: these do normal PC-style frame buffer accesses

 */

static inline void scr_writeb(unsigned char val, unsigned char * addr)

{

        *addr = val;

}

static inline unsigned char scr_readb(unsigned char * addr)

{

        return *addr;

}

static inline void scr_writew(unsigned short val, unsigned short * addr)

{

        *addr = val;

}

static inline unsigned short scr_readw(unsigned short * addr)

{

        return *addr;

}

#endif /* __alpha__ */

#endif /* CONFIG_TGA_CONSOLE */

static inline void memsetw(void * s, unsigned short c, unsigned int count)

{

        unsigned short * addr = (unsigned short *) s;

        count /= 2;

        while (count) {

                count--;

                scr_writew(c, addr++);

        }

}

static inline void memcpyw(unsigned short *to, unsigned short *from,

                           unsigned int count)

{

        count /= 2;

        while (count) {

                count--;

                scr_writew(scr_readw(from++), to++);

        }

}