1/* 2 * "Indirect" DCR access 3 * 4 * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12#include <asm/ppc_asm.h> 13#include <asm/processor.h> 14 15#define DCR_ACCESS_PROLOG(table) \ 16 rlwinm r3,r3,4,18,27; \ 17 lis r5,table@h; \ 18 ori r5,r5,table@l; \ 19 add r3,r3,r5; \ 20 mtctr r3; \ 21 bctr 22 23_GLOBAL(__mfdcr) 24 DCR_ACCESS_PROLOG(__mfdcr_table) 25 26_GLOBAL(__mtdcr) 27 DCR_ACCESS_PROLOG(__mtdcr_table) 28 29__mfdcr_table: 30 mfdcr r3,0; blr 31__mtdcr_table: 32 mtdcr 0,r4; blr 33 34dcr = 1 35 .rept 1023 36 mfdcr r3,dcr; blr 37 mtdcr dcr,r4; blr 38 dcr = dcr + 1 39 .endr 40