asm-generic: add generic ABI headers

These header files are typically copied from an existing architecture
into any new one, slightly modified and then remain untouched until
the end of time in the name of ABI stability.

To make it easier for future architectures, provide a sane generic
version here. In cases where multiple architectures already use
identical code, I used the most common version. In cases like
stat.h that are more or less broken everywhere, I provide a
version that is meant to be ideal for new architectures.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 154 insertions, 0 deletions

diff --git a/include/asm-generic/termios.h b/include/asm-generic/termios.h
new file mode 100644
index 000000000000..d0922adc56d4
--- /dev/null
+++ b/include/asm-generic/termios.h
@@ -0,0 +1,154 @@
+#ifndef _ASM_GENERIC_TERMIOS_H
+#define _ASM_GENERIC_TERMIOS_H
+/*
+ * Most architectures have straight copies of the x86 code, with
+ * varying levels of bug fixes on top. Usually it's a good idea
+ * to use this generic version instead, but be careful to avoid
+ * ABI changes.
+ * New architectures should not provide their own version.
+ */
+
+#include <asm/termbits.h>
+#include <asm/ioctls.h>
+
+struct winsize {
+        unsigned short ws_row;
+        unsigned short ws_col;
+        unsigned short ws_xpixel;
+        unsigned short ws_ypixel;
+};
+
+#define NCC 8
+struct termio {
+        unsigned short c_iflag;         /* input mode flags */
+        unsigned short c_oflag;         /* output mode flags */
+        unsigned short c_cflag;         /* control mode flags */
+        unsigned short c_lflag;         /* local mode flags */
+        unsigned char c_line;           /* line discipline */
+        unsigned char c_cc[NCC];        /* control characters */
+};
+
+/* modem lines */
+#define TIOCM_LE        0x001
+#define TIOCM_DTR       0x002
+#define TIOCM_RTS       0x004
+#define TIOCM_ST        0x008
+#define TIOCM_SR        0x010
+#define TIOCM_CTS       0x020
+#define TIOCM_CAR       0x040
+#define TIOCM_RNG       0x080
+#define TIOCM_DSR       0x100
+#define TIOCM_CD        TIOCM_CAR
+#define TIOCM_RI        TIOCM_RNG
+#define TIOCM_OUT1      0x2000
+#define TIOCM_OUT2      0x4000
+#define TIOCM_LOOP      0x8000
+
+/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
+
+#ifdef __KERNEL__
+
+#include <asm/uaccess.h>
+
+/*      intr=^C         quit=^\         erase=del       kill=^U
+        eof=^D          vtime=\0        vmin=\1         sxtc=\0
+        start=^Q        stop=^S         susp=^Z         eol=\0
+        reprint=^R      discard=^U      werase=^W       lnext=^V
+        eol2=\0
+*/
+#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
+
+/*
+ * Translate a "termio" structure into a "termios". Ugh.
+ */
+static inline int user_termio_to_kernel_termios(struct ktermios *termios,
+                                                const struct termio __user *termio)
+{
+        unsigned short tmp;
+
+        if (get_user(tmp, &termio->c_iflag) < 0)
+                goto fault;
+        termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
+
+        if (get_user(tmp, &termio->c_oflag) < 0)
+                goto fault;
+        termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
+
+        if (get_user(tmp, &termio->c_cflag) < 0)
+                goto fault;
+        termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
+
+        if (get_user(tmp, &termio->c_lflag) < 0)
+                goto fault;
+        termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
+
+        if (get_user(termios->c_line, &termio->c_line) < 0)
+                goto fault;
+
+        if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
+                goto fault;
+
+        return 0;
+
+ fault:
+        return -EFAULT;
+}
+
+/*
+ * Translate a "termios" structure into a "termio". Ugh.
+ */
+static inline int kernel_termios_to_user_termio(struct termio __user *termio,
+                                                struct ktermios *termios)
+{
+        if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
+            put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
+            put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
+            put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
+            put_user(termios->c_line,  &termio->c_line) < 0 ||
+            copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
+                return -EFAULT;
+
+        return 0;
+}
+
+#ifdef TCGETS2
+static inline int user_termios_to_kernel_termios(struct ktermios *k,
+                                                 struct termios2 __user *u)
+{
+        return copy_from_user(k, u, sizeof(struct termios2));
+}
+
+static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
+                                                 struct ktermios *k)
+{
+        return copy_to_user(u, k, sizeof(struct termios2));
+}
+
+static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
+                                                   struct termios __user *u)
+{
+        return copy_from_user(k, u, sizeof(struct termios));
+}
+
+static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
+                                                   struct ktermios *k)
+{
+        return copy_to_user(u, k, sizeof(struct termios));
+}
+#else /* TCGETS2 */
+static inline int user_termios_to_kernel_termios(struct ktermios *k,
+                                                 struct termios __user *u)
+{
+        return copy_from_user(k, u, sizeof(struct termios));
+}
+
+static inline int kernel_termios_to_user_termios(struct termios __user *u,
+                                                 struct ktermios *k)
+{
+        return copy_to_user(u, k, sizeof(struct termios));
+}
+#endif /* TCGETS2 */
+
+#endif  /* __KERNEL__ */
+
+#endif /* _ASM_GENERIC_TERMIOS_H */