diff options
Diffstat (limited to 'libgloss/m68k/idp-inbyte.c')
-rw-r--r-- | libgloss/m68k/idp-inbyte.c | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/libgloss/m68k/idp-inbyte.c b/libgloss/m68k/idp-inbyte.c deleted file mode 100644 index 41db57fc9..000000000 --- a/libgloss/m68k/idp-inbyte.c +++ /dev/null @@ -1,41 +0,0 @@ -/* idp-inbyte.c -- - * Copyright (c) 1995 Cygnus Support - * - * The authors hereby grant permission to use, copy, modify, distribute, - * and license this software and its documentation for any purpose, provided - * that existing copyright notices are retained in all copies and that this - * notice is included verbatim in any distributions. No written agreement, - * license, or royalty fee is required for any of the authorized uses. - * Modifications to this software may be copyrighted by their authors - * and need not follow the licensing terms described here, provided that - * the new terms are clearly indicated on the first page of each file where - * they apply. - */ - -#include <_ansi.h> -#include "mc68681reg.h" - -/* - * The DUART is mapped into the IDP address space in an unusual - * manner. The mc68681 is an 8 bit device located on the least - * significant byte (byte0) of the data bus. Bytes 3, 2, and - * one have nothing in them and writes to these locations are - * not valid. - */ - -#define DUART_ADDR 0x00B00000 -#define READREG(x) (*((volatile char *) DUART_ADDR + (x * 4) + 3)) -#define WRITEREG(x, y) (*((char *) DUART_ADDR + (x * 4) + 3) = y) - -/* - * inbyte -- get a byte from the DUART RX buffer. This only reads - * from channel A - */ -char -_DEFUN_VOID (inbyte) -{ - while ((READREG (DUART_SRA) & 0x01) == 0x00) - ; - - return (READREG (DUART_RBA)); /* read the byte */ -} |