LCOV - code coverage report
Current view: top level - include/linux - vt_buffer.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 5 100.0 %
Date: 2017-01-25 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  *      include/linux/vt_buffer.h -- Access to VT screen buffer
       3             :  *
       4             :  *      (c) 1998 Martin Mares <mj@ucw.cz>
       5             :  *
       6             :  *      This is a set of macros and functions which are used in the
       7             :  *      console driver and related code to access the screen buffer.
       8             :  *      In most cases the console works with simple in-memory buffer,
       9             :  *      but when handling hardware text mode consoles, we store
      10             :  *      the foreground console directly in video memory.
      11             :  */
      12             : 
      13             : #ifndef _LINUX_VT_BUFFER_H_
      14             : #define _LINUX_VT_BUFFER_H_
      15             : 
      16             : 
      17             : #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
      18             : #include <asm/vga.h>
      19             : #endif
      20             : 
      21             : #ifndef VT_BUF_HAVE_RW
      22             : #define scr_writew(val, addr) (*(addr) = (val))
      23             : #define scr_readw(addr) (*(addr))
      24             : #define scr_memcpyw(d, s, c) memcpy(d, s, c)
      25             : #define scr_memmovew(d, s, c) memmove(d, s, c)
      26             : #define VT_BUF_HAVE_MEMCPYW
      27             : #define VT_BUF_HAVE_MEMMOVEW
      28             : #endif
      29             : 
      30             : #ifndef VT_BUF_HAVE_MEMSETW
      31             : static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
      32             : {
      33         168 :         count /= 2;
      34         504 :         while (count--)
      35         336 :                 scr_writew(c, s++);
      36         168 : }
      37             : #endif
      38             : 
      39             : #ifndef VT_BUF_HAVE_MEMCPYW
      40             : static inline void scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
      41          84 : {
      42             :         count /= 2;
      43             :         while (count--)
      44             :                 scr_writew(scr_readw(s++), d++);
      45             : }
      46             : #endif
      47             : 
      48             : #ifndef VT_BUF_HAVE_MEMMOVEW
      49             : static inline void scr_memmovew(u16 *d, const u16 *s, unsigned int count)
      50             : {
      51             :         if (d < s)
      52             :                 scr_memcpyw(d, s, count);
      53             :         else {
      54             :                 count /= 2;
      55             :                 d += count;
      56             :                 s += count;
      57             :                 while (count--)
      58             :                         scr_writew(scr_readw(--s), --d);
      59             :         }
      60             : }
      61             : #endif
      62             : 
      63             : #endif

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