Return to board_io.S CVS log

Up to [Qemu by Fabrice Bellard] / qemu / roms / SLOF / board-qemu / llfw

Annotation of qemu/roms/SLOF/board-qemu/llfw/board_io.S, revision 1.1

1.1     ! root        1: /******************************************************************************
        !             2:  * Copyright (c) 2004, 2011 IBM Corporation
        !             3:  * All rights reserved.
        !             4:  * This program and the accompanying materials
        !             5:  * are made available under the terms of the BSD License
        !             6:  * which accompanies this distribution, and is available at
        !             7:  * http://www.opensource.org/licenses/bsd-license.php
        !             8:  *
        !             9:  * Contributors:
        !            10:  *     IBM Corporation - initial implementation
        !            11:  *****************************************************************************/
        !            12: 
        !            13: #include <macros.h>
        !            14: #include <cpu.h>
        !            15: 
        !            16:        .text
        !            17: 
        !            18: /****************************************************************************
        !            19:  * prints one character to serial console
        !            20:  *
        !            21:  * Input:
        !            22:  * R3 - character
        !            23:  *
        !            24:  * Returns: -
        !            25:  *
        !            26:  * Modifies Registers:
        !            27:  * R3, R4, R5, R6, R7
        !            28:  ****************************************************************************/
        !            29: ENTRY(io_putchar)
        !            30:        sldi    r6,r3,(24+32)
        !            31:        li      r3,0x58
        !            32:        li      r4,0
        !            33:        li      r5,1
        !            34:        .long 0x44000022
        !            35:        blr
        !            36:        
        !            37: ENTRY(io_getchar)
        !            38:        mr      r10,r3
        !            39:        li      r3,0x54
        !            40:        li      r4,0
        !            41:        .long 0x44000022
        !            42:        mr.     r3,r4
        !            43:        beq     1f
        !            44:        srdi    r3,r5,(24+32)
        !            45:        stb     r3,0(r10)
        !            46: 1:     blr

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.