| /****************************************************************************** |
| * Copyright (c) 2004, 2011 IBM Corporation |
| * All rights reserved. |
| * This program and the accompanying materials |
| * are made available under the terms of the BSD License |
| * which accompanies this distribution, and is available at |
| * http://www.opensource.org/licenses/bsd-license.php |
| * |
| * Contributors: |
| * IBM Corporation - initial implementation |
| *****************************************************************************/ |
| |
| #include <macros.h> |
| #include <cpu.h> |
| |
| .text |
| |
| /**************************************************************************** |
| * prints one character to serial console |
| * |
| * Input: |
| * R3 - character |
| * |
| * Returns: - |
| * |
| * Modifies Registers: |
| * R3, R4, R5, R6, R7 |
| ****************************************************************************/ |
| ENTRY(io_putchar) |
| sldi r6,r3,(24+32) |
| li r3,0x58 |
| li r4,0 |
| li r5,1 |
| .long 0x44000022 |
| blr |
| |
| ENTRY(io_getchar) |
| mr r10,r3 |
| li r3,0x54 |
| li r4,0 |
| .long 0x44000022 |
| mr. r3,r4 |
| beq 1f |
| srdi r3,r5,(24+32) |
| stb r3,0(r10) |
| 1: blr |
