root/drivers/char/selection.h

/* */

INCLUDED FROM

DEFINITIONS

1. scr_writew
2. scr_readw
3. scr_writew
4. scr_readw

   1 /*
   2  * selection.h
   3  *
   4  * Interface between console.c, tty_io.c, vt.c, vc_screen.c and selection.c
   5  */
   6 extern int sel_cons;
   7 
   8 extern void clear_selection(void);
   9 extern int set_selection(const unsigned long arg, struct tty_struct *tty);
  10 extern int paste_selection(struct tty_struct *tty);
  11 extern int sel_loadlut(const unsigned long arg);
  12 extern int mouse_reporting(void);
  13 extern void mouse_report(struct tty_struct * tty, int butt, int mrx, int mry);
  14 
  15 extern unsigned long video_num_columns;
  16 extern unsigned long video_num_lines;
  17 extern unsigned long video_size_row;
  18 
  19 extern void do_unblank_screen(void);
  20 extern unsigned short *screen_pos(int currcons, int w_offset, int viewed);
  21 extern unsigned short screen_word(int currcons, int offset, int viewed);
  22 extern void complement_pos(int currcons, int offset);
  23 extern void invert_screen(int currcons, int offset, int count, int shift);
  24 
  25 #define reverse_video_char(a)   (((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77))
  26 #define reverse_video_short(a)  (((a) & 0x88ff) | \
  27         (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4))
  28 /* this latter line used to have masks 0xf000 and 0x0f00, but selection
  29    requires a self-inverse operation; moreover, the old version looks wrong */
  30 
  31 extern void getconsxy(int currcons, char *p);
  32 extern void putconsxy(int currcons, char *p);
  33 
  34 /* how to access screen memory */
  35 #ifdef __alpha__
  36 
  37 #include <asm/io.h> 
  38 
  39 static inline void scr_writew(unsigned short val, unsigned short * addr)
     /*  */
  40 {
  41         if ((long) addr < 0)
  42                 *addr = val;
  43         else
  44                 writew(val, (unsigned long) addr);
  45 }
  46 
  47 static inline unsigned short scr_readw(unsigned short * addr)
     /*  */
  48 {
  49         if ((long) addr < 0)
  50                 return *addr;
  51         return readw((unsigned long) addr);
  52 }
  53 
  54 #else
  55 
  56 static inline void scr_writew(unsigned short val, unsigned short * addr)
     /*  */
  57 {
  58         *addr = val;
  59 }
  60 
  61 static inline unsigned short scr_readw(unsigned short * addr)
     /*  */
  62 {
  63         return *addr;
  64 }
  65 
  66 #endif

/* */