Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * "Indirect" DCR access

 *

 * Copyright (c) 2004 Eugene Surovegin 

 *

 * This program is free software; you can redistribute it and/or modify it

 * under  the terms of  the GNU General Public License as published by the

 * Free Software Foundation;  either version 2 of the License, or (at your

 * option) any later version.

 */

#include 

#include 

#define DCR_ACCESS_PROLOG(table) \

        rlwinm  r3,r3,4,18,27;   \

        lis     r5,table@h;      \

        ori     r5,r5,table@l;   \

        add     r3,r3,r5;        \

        mtctr   r3;              \

        bctr

_GLOBAL(__mfdcr)

        DCR_ACCESS_PROLOG(__mfdcr_table)

_GLOBAL(__mtdcr)

        DCR_ACCESS_PROLOG(__mtdcr_table)

__mfdcr_table:

        mfdcr  r3,0; blr

__mtdcr_table:

        mtdcr  0,r4; blr

dcr     = 1

        .rept   1023

        mfdcr   r3,dcr; blr

        mtdcr   dcr,r4; blr

        dcr     = dcr + 1

        .endr