| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */
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| 2 | /*
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| 3 | * "Indirect" DCR access
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| 4 | *
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| 5 | * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net>
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| 6 | */
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| 7 |
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| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 |
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| 13 | |
| 14 | cmplwi cr0,r3,1024; \
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| 15 | rlwinm r3,r3,4,18,27; \
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| 16 | lis r5,table@h; \
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| 17 | ori r5,r5,table@l; \
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| 18 | add r3,r3,r5; \
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| 19 | bge- 1f; \
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| 20 | mtctr r3; \
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| 21 | bctr; \
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| 22 | 1: trap; \
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| 23 | EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; \
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| 24 | blr
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| 25 |
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| 26 | _GLOBAL(__mfdcr)
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| 27 | DCR_ACCESS_PROLOG(__mfdcr_table)
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| 28 | EXPORT_SYMBOL(__mfdcr)
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| 29 |
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| 30 | _GLOBAL(__mtdcr)
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| 31 | DCR_ACCESS_PROLOG(__mtdcr_table)
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| 32 | EXPORT_SYMBOL(__mtdcr)
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| 33 |
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| 34 | __mfdcr_table:
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| 35 | mfdcr r3,0; blr
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| 36 | __mtdcr_table:
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| 37 | mtdcr 0,r4; blr
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| 38 |
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| 39 | dcr = 1
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| 40 | .rept 1023
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| 41 | mfdcr r3,dcr; blr
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| 42 | mtdcr dcr,r4; blr
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| 43 | dcr = dcr + 1
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| 44 | .endr
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