arch/alpha/include/asm/termios.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ALPHA_TERMIOS_H
   3 #define _ALPHA_TERMIOS_H
   4
   5 #include <uapi/asm/termios.h>
   6
   7 /*      eof=^D          eol=\0          eol2=\0         erase=del
   8         werase=^W       kill=^U         reprint=^R      sxtc=\0
   9         intr=^C         quit=^\         susp=^Z         <OSF/1 VDSUSP>
  10         start=^Q        stop=^S         lnext=^V        discard=^U
  11         vmin=\1         vtime=\0
  12 */
  13 #define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000"
  14
  15 /*
  16  * Translate a "termio" structure into a "termios". Ugh.
  17  */
  18
  19 #define user_termio_to_kernel_termios(a_termios, u_termio)                      \
  20 ({                                                                              \
  21         struct ktermios *k_termios = (a_termios);                               \
  22         struct termio k_termio;                                                 \
  23         int canon, ret;                                                         \
  24                                                                                 \
  25         ret = copy_from_user(&k_termio, u_termio, sizeof(k_termio));            \
  26         if (!ret) {                                                             \
  27                 /* Overwrite only the low bits.  */                             \
  28                 *(unsigned short *)&k_termios->c_iflag = k_termio.c_iflag;      \
  29                 *(unsigned short *)&k_termios->c_oflag = k_termio.c_oflag;      \
  30                 *(unsigned short *)&k_termios->c_cflag = k_termio.c_cflag;      \
  31                 *(unsigned short *)&k_termios->c_lflag = k_termio.c_lflag;      \
  32                 canon = k_termio.c_lflag & ICANON;                              \
  33                                                                                 \
  34                 k_termios->c_cc[VINTR]  = k_termio.c_cc[_VINTR];                \
  35                 k_termios->c_cc[VQUIT]  = k_termio.c_cc[_VQUIT];                \
  36                 k_termios->c_cc[VERASE] = k_termio.c_cc[_VERASE];               \
  37                 k_termios->c_cc[VKILL]  = k_termio.c_cc[_VKILL];                \
  38                 k_termios->c_cc[VEOL2]  = k_termio.c_cc[_VEOL2];                \
  39                 k_termios->c_cc[VSWTC]  = k_termio.c_cc[_VSWTC];                \
  40                 k_termios->c_cc[canon ? VEOF : VMIN]  = k_termio.c_cc[_VEOF];   \
  41                 k_termios->c_cc[canon ? VEOL : VTIME] = k_termio.c_cc[_VEOL];   \
  42         }                                                                       \
  43         ret;                                                                    \
  44 })
  45
  46 /*
  47  * Translate a "termios" structure into a "termio". Ugh.
  48  *
  49  * Note the "fun" _VMIN overloading.
  50  */
  51 #define kernel_termios_to_user_termio(u_termio, a_termios)              \
  52 ({                                                                      \
  53         struct ktermios *k_termios = (a_termios);                       \
  54         struct termio k_termio;                                         \
  55         int canon;                                                      \
  56                                                                         \
  57         k_termio.c_iflag = k_termios->c_iflag;                          \
  58         k_termio.c_oflag = k_termios->c_oflag;                          \
  59         k_termio.c_cflag = k_termios->c_cflag;                          \
  60         canon = (k_termio.c_lflag = k_termios->c_lflag) & ICANON;       \
  61                                                                         \
  62         k_termio.c_line = k_termios->c_line;                            \
  63         k_termio.c_cc[_VINTR]  = k_termios->c_cc[VINTR];                \
  64         k_termio.c_cc[_VQUIT]  = k_termios->c_cc[VQUIT];                \
  65         k_termio.c_cc[_VERASE] = k_termios->c_cc[VERASE];               \
  66         k_termio.c_cc[_VKILL]  = k_termios->c_cc[VKILL];                \
  67         k_termio.c_cc[_VEOF]   = k_termios->c_cc[canon ? VEOF : VMIN];  \
  68         k_termio.c_cc[_VEOL]   = k_termios->c_cc[canon ? VEOL : VTIME]; \
  69         k_termio.c_cc[_VEOL2]  = k_termios->c_cc[VEOL2];                \
  70         k_termio.c_cc[_VSWTC]  = k_termios->c_cc[VSWTC];                \
  71                                                                         \
  72         copy_to_user(u_termio, &k_termio, sizeof(k_termio));            \
  73 })
  74
  75 #define user_termios_to_kernel_termios(k, u) \
  76         copy_from_user(k, u, sizeof(struct termios))
  77
  78 #define kernel_termios_to_user_termios(u, k) \
  79         copy_to_user(u, k, sizeof(struct termios))
  80
  81 #endif  /* _ALPHA_TERMIOS_H */