arch/alpha/include/asm/termios.h

   1 #ifndef _ALPHA_TERMIOS_H
   2 #define _ALPHA_TERMIOS_H
   3
   4 #include <asm/ioctls.h>
   5 #include <asm/termbits.h>
   6
   7 struct sgttyb {
   8         char    sg_ispeed;
   9         char    sg_ospeed;
  10         char    sg_erase;
  11         char    sg_kill;
  12         short   sg_flags;
  13 };
  14
  15 struct tchars {
  16         char    t_intrc;
  17         char    t_quitc;
  18         char    t_startc;
  19         char    t_stopc;
  20         char    t_eofc;
  21         char    t_brkc;
  22 };
  23
  24 struct ltchars {
  25         char    t_suspc;
  26         char    t_dsuspc;
  27         char    t_rprntc;
  28         char    t_flushc;
  29         char    t_werasc;
  30         char    t_lnextc;
  31 };
  32
  33 struct winsize {
  34         unsigned short ws_row;
  35         unsigned short ws_col;
  36         unsigned short ws_xpixel;
  37         unsigned short ws_ypixel;
  38 };
  39
  40 #define NCC 8
  41 struct termio {
  42         unsigned short c_iflag;         /* input mode flags */
  43         unsigned short c_oflag;         /* output mode flags */
  44         unsigned short c_cflag;         /* control mode flags */
  45         unsigned short c_lflag;         /* local mode flags */
  46         unsigned char c_line;           /* line discipline */
  47         unsigned char c_cc[NCC];        /* control characters */
  48 };
  49
  50 /*
  51  * c_cc characters in the termio structure.  Oh, how I love being
  52  * backwardly compatible.  Notice that character 4 and 5 are
  53  * interpreted differently depending on whether ICANON is set in
  54  * c_lflag.  If it's set, they are used as _VEOF and _VEOL, otherwise
  55  * as _VMIN and V_TIME.  This is for compatibility with OSF/1 (which
  56  * is compatible with sysV)...
  57  */
  58 #define _VINTR  0
  59 #define _VQUIT  1
  60 #define _VERASE 2
  61 #define _VKILL  3
  62 #define _VEOF   4
  63 #define _VMIN   4
  64 #define _VEOL   5
  65 #define _VTIME  5
  66 #define _VEOL2  6
  67 #define _VSWTC  7
  68
  69 #ifdef __KERNEL__
  70 /*      eof=^D          eol=\0          eol2=\0         erase=del
  71         werase=^W       kill=^U         reprint=^R      sxtc=\0
  72         intr=^C         quit=^\         susp=^Z         <OSF/1 VDSUSP>
  73         start=^Q        stop=^S         lnext=^V        discard=^U
  74         vmin=\1         vtime=\0
  75 */
  76 #define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000"
  77
  78 /*
  79  * Translate a "termio" structure into a "termios". Ugh.
  80  */
  81
  82 #define user_termio_to_kernel_termios(a_termios, u_termio)                      \
  83 ({                                                                              \
  84         struct ktermios *k_termios = (a_termios);                               \
  85         struct termio k_termio;                                                 \
  86         int canon, ret;                                                         \
  87                                                                                 \
  88         ret = copy_from_user(&k_termio, u_termio, sizeof(k_termio));            \
  89         if (!ret) {                                                             \
  90                 /* Overwrite only the low bits.  */                             \
  91                 *(unsigned short *)&k_termios->c_iflag = k_termio.c_iflag;      \
  92                 *(unsigned short *)&k_termios->c_oflag = k_termio.c_oflag;      \
  93                 *(unsigned short *)&k_termios->c_cflag = k_termio.c_cflag;      \
  94                 *(unsigned short *)&k_termios->c_lflag = k_termio.c_lflag;      \
  95                 canon = k_termio.c_lflag & ICANON;                              \
  96                                                                                 \
  97                 k_termios->c_cc[VINTR]  = k_termio.c_cc[_VINTR];                \
  98                 k_termios->c_cc[VQUIT]  = k_termio.c_cc[_VQUIT];                \
  99                 k_termios->c_cc[VERASE] = k_termio.c_cc[_VERASE];               \
 100                 k_termios->c_cc[VKILL]  = k_termio.c_cc[_VKILL];                \
 101                 k_termios->c_cc[VEOL2]  = k_termio.c_cc[_VEOL2];                \
 102                 k_termios->c_cc[VSWTC]  = k_termio.c_cc[_VSWTC];                \
 103                 k_termios->c_cc[canon ? VEOF : VMIN]  = k_termio.c_cc[_VEOF];   \
 104                 k_termios->c_cc[canon ? VEOL : VTIME] = k_termio.c_cc[_VEOL];   \
 105         }                                                                       \
 106         ret;                                                                    \
 107 })
 108
 109 /*
 110  * Translate a "termios" structure into a "termio". Ugh.
 111  *
 112  * Note the "fun" _VMIN overloading.
 113  */
 114 #define kernel_termios_to_user_termio(u_termio, a_termios)              \
 115 ({                                                                      \
 116         struct ktermios *k_termios = (a_termios);                       \
 117         struct termio k_termio;                                         \
 118         int canon;                                                      \
 119                                                                         \
 120         k_termio.c_iflag = k_termios->c_iflag;                          \
 121         k_termio.c_oflag = k_termios->c_oflag;                          \
 122         k_termio.c_cflag = k_termios->c_cflag;                          \
 123         canon = (k_termio.c_lflag = k_termios->c_lflag) & ICANON;       \
 124                                                                         \
 125         k_termio.c_line = k_termios->c_line;                            \
 126         k_termio.c_cc[_VINTR]  = k_termios->c_cc[VINTR];                \
 127         k_termio.c_cc[_VQUIT]  = k_termios->c_cc[VQUIT];                \
 128         k_termio.c_cc[_VERASE] = k_termios->c_cc[VERASE];               \
 129         k_termio.c_cc[_VKILL]  = k_termios->c_cc[VKILL];                \
 130         k_termio.c_cc[_VEOF]   = k_termios->c_cc[canon ? VEOF : VMIN];  \
 131         k_termio.c_cc[_VEOL]   = k_termios->c_cc[canon ? VEOL : VTIME]; \
 132         k_termio.c_cc[_VEOL2]  = k_termios->c_cc[VEOL2];                \
 133         k_termio.c_cc[_VSWTC]  = k_termios->c_cc[VSWTC];                \
 134                                                                         \
 135         copy_to_user(u_termio, &k_termio, sizeof(k_termio));            \
 136 })
 137
 138 #define user_termios_to_kernel_termios(k, u) \
 139         copy_from_user(k, u, sizeof(struct termios))
 140
 141 #define kernel_termios_to_user_termios(u, k) \
 142         copy_to_user(u, k, sizeof(struct termios))
 143
 144 #endif  /* __KERNEL__ */
 145
 146 #endif  /* _ALPHA_TERMIOS_H */