diff options
Diffstat (limited to 'nuttx/arch/z80/src/z180/z180_io.c')
-rw-r--r-- | nuttx/arch/z80/src/z180/z180_io.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/nuttx/arch/z80/src/z180/z180_io.c b/nuttx/arch/z80/src/z180/z180_io.c new file mode 100644 index 000000000..7e738c953 --- /dev/null +++ b/nuttx/arch/z80/src/z180/z180_io.c @@ -0,0 +1,94 @@ +/**************************************************************************** + * arch/z80/src/z180/z180_io.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/arch.h> +/* #include <nuttx/irq.h> */ + +#include "up_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: outb + * + * Description: + * Output byte c on port p + * + ****************************************************************************/ + +void outp(char p, char c) +{ + __asm + ld c, 4(ix) ; port + ld a, 5(ix) ; value + out (c), a + __endasm; +} + + +/**************************************************************************** + * Name: inpb + * + * Description: + * Input byte from port p + * + ****************************************************************************/ + +char inp(char p) __naked +{ + __asm + ld c, 4(ix) ;port + in l, (c) + __endasm; +} |