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| /* SPDX-License-Identifier: GPL-2.0-or-later */
| /*
| * "Indirect" DCR access
| *
| * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net>
| */
|
| #include <asm/ppc_asm.h>
| #include <asm/processor.h>
| #include <asm/bug.h>
| #include <asm/export.h>
|
| #define DCR_ACCESS_PROLOG(table) \
| cmplwi cr0,r3,1024; \
| rlwinm r3,r3,4,18,27; \
| lis r5,table@h; \
| ori r5,r5,table@l; \
| add r3,r3,r5; \
| bge- 1f; \
| mtctr r3; \
| bctr; \
| 1: trap; \
| EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; \
| blr
|
| _GLOBAL(__mfdcr)
| DCR_ACCESS_PROLOG(__mfdcr_table)
| EXPORT_SYMBOL(__mfdcr)
|
| _GLOBAL(__mtdcr)
| DCR_ACCESS_PROLOG(__mtdcr_table)
| EXPORT_SYMBOL(__mtdcr)
|
| __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
|
|
