cpu_init.s

xilinx内嵌CPU下的UCOS移植

/*-----------------------------------------------------------------------------
//     $Date: 2006/04/21 00:58:02 $
//     $RCSfile: cpu_init.S,v $
//-----------------------------------------------------------------------------
//
// Copyright (c) 2005 Xilinx, Inc.  All rights reserved. 
// 
// Xilinx, Inc. 
// XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A 
// COURTESY TO YOU.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS 
// ONE POSSIBLE   IMPLEMENTATION OF THIS FEATURE, APPLICATION OR 
// STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION 
// IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE 
// FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. 
// XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO 
// THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO 
// ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE 
// FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY 
// AND FITNESS FOR A PARTICULAR PURPOSE.
//
//---------------------------------------------------------------------------*/

/*  __cpu_init -- CPU specific initialization. Invoked from main CRT 
 *    
 */
    
    .section .text, "ax"
    .global __cpu_init
    .align 2    
__cpu_init:     
        /* CR 203746 Patch for PPC405 errata */
        mfccr0  3
        oris    3,3,0x50000000@h
        mtccr0  3
        blrl