getput.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  getput.c	
 *  - get/put of 8, 16 and 32 bit numbers as big or little endian data
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
 * or any contractually-authorized third party in a separate license agreement 
 * between the parties. 
 * The information contained in this document constitutes one or more of the 
 * following: commercial computer software, commercial computer software 
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 * any related documentation of any kind, including related technical data or 
 * manuals, is an agency, department, or other entity of the United States 
 * government ("Government"), the use, duplication, reproduction, release, 
 * modification, disclosure, or transfer of this information, or any related 
 * documentation of any kind, is restricted in accordance with Federal 
 * Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
 * this information by the Government is further restricted in accordance with 
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 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/

#include <sysdefs.h>


UINT16	getb16(UINT8 *p)
{
	return ((UINT16) *p << 8)      | ((UINT16) *(p+1));
}

UINT32	getb32(UINT8 *p)
{
	return ((UINT32) *p     << 24) | ((UINT32) *(p+1) << 16) |
	       ((UINT32) *(p+2) <<  8) | ((UINT32) *(p+3));
}

void	putb16(UINT8 *p, UINT16 v)
{
	*p     = (UINT8) (v >> 8);
	*(p+1) = (UINT8) v;
}

void	putb32(UINT8 *p, UINT32 v)
{
	*p     = (UINT8) (v >> 24);
	*(p+1) = (UINT8) (v >> 16);
	*(p+2) = (UINT8) (v >>  8);
	*(p+3) = (UINT8) (v);
}



UINT16	getl16(UINT8 *p)
{
	return ((UINT16) *p)           | ((UINT16) *(p+1) << 8);
}

UINT32	getl32(UINT8 *p)
{
	return ((UINT32) *p)           | ((UINT32) *(p+1) << 8) |
	       ((UINT32) *(p+2) << 16) | ((UINT32) *(p+3) << 24);
}

void	putl16(UINT8 *p, UINT16 v)
{
	*p     = (UINT8) (v);
	*(p+1) = (UINT8) (v >> 8);
}

void	putl32(UINT8 *p, UINT32 v)
{
	*p     = (UINT8) (v);
	*(p+1) = (UINT8) (v >>  8);
	*(p+2) = (UINT8) (v >> 16);
	*(p+3) = (UINT8) (v >> 24);
}