cpu.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  cpu_c.c
 *
 *  Cache C-functions
 *
 *
 * ######################################################################
 *
 * 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 * Unpublished rights reserved under the Copyright Laws of the United States of 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 
 * documentation or other commercial items. If the user of this information, or 
 * 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 
 * the terms of the license agreement(s) and/or applicable contract terms and 
 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/


/************************************************************************
 *  Include files
 ************************************************************************/

#include <sysdefs.h>
#include <sys_api.h>

/************************************************************************
 *  Definitions
 ************************************************************************/

/************************************************************************
 *  Public variables
 ************************************************************************/

/************************************************************************
 *  Static variables
 ************************************************************************/


/************************************************************************
 *  Static function prototypes
 ************************************************************************/

/************************************************************************
 *  Implementation : Public functions
 ************************************************************************/

/************************************************************************
 *
 *                          sys_dcache_flush_all
 *  Description :
 *  -------------
 *
 *  Flush entire DCACHE
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
sys_dcache_flush_all( void )
{
    UINT32 line;
    UINT32 addr;

    /* Flush DCACHE */
    for( line = 0, addr = KSEG0(0);
         line < sys_dcache_lines; 
	 line++, addr += sys_dcache_linesize )
    {
        sys_dcache_flush_index( addr );
    }
}  


/************************************************************************
 *
 *                          sys_icache_invalidate_all
 *  Description :
 *  -------------
 *
 *  Invalidate entire ICACHE
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
sys_icache_invalidate_all( void )
{
    UINT32 line;
    UINT32 addr;

    /* Invalidate ICACHE */
    for( line = 0, addr = KSEG0(0); 
         line < sys_icache_lines; 
	 line++, addr += sys_icache_linesize )
    {
        sys_icache_invalidate_index( addr );
    }
}


/************************************************************************
 *
 *                          sys_flush_caches
 *  Description :
 *  -------------
 *
 *  First flush entire DCACHE, then invalidate entire ICACHE
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
sys_flush_caches( void )
{
    sys_dcache_flush_all();
    sys_icache_invalidate_all();
}


/************************************************************************
 *
 *                          sys_flush_cache_line
 *  Description :
 *  -------------
 *
 *  First flush DCACHE line, then invalidate ICACHE line
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
sys_flush_cache_line( 
    void *addr )
{
    /* word align address */
    addr = (void *)((UINT32)addr & ~0x3);

    sys_dcache_flush_addr( (UINT32)addr );
    sys_icache_invalidate_addr( (UINT32)addr );
}


/************************************************************************
 *  Implementation : Static functions
 ************************************************************************/