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- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- * "Indirect" DCR access
- *
- * Copyright (c) 2004 Eugene Surovegin <[email protected]>
- */
- #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
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