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#include <asm/bug.h> 15 16#define DCR_ACCESS_PROLOG(table) \ 17 cmpli cr0,r3,1024; \ 18 rlwinm r3,r3,4,18,27; \ 19 lis r5,table@h; \ 20 ori r5,r5,table@l; \ 21 add r3,r3,r5; \ 22 bge- 1f; \ 23 mtctr r3; \ 24 bctr; \ 251: trap; \ 26 EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; \ 27 blr 28 29_GLOBAL(__mfdcr) 30 DCR_ACCESS_PROLOG(__mfdcr_table) 31 32_GLOBAL(__mtdcr) 33 DCR_ACCESS_PROLOG(__mtdcr_table) 34 35__mfdcr_table: 36 mfdcr r3,0; blr 37__mtdcr_table: 38 mtdcr 0,r4; blr 39 40dcr = 1 41 .rept 1023 42 mfdcr r3,dcr; blr 43 mtdcr dcr,r4; blr 44 dcr = dcr + 1 45 .endr 46