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