47 lines
1013 B
C
47 lines
1013 B
C
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/*
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* Copyright 2016-17 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/ppc-opcode.h>
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#define CR0_SHIFT 28
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#define CR0_MASK 0xF
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/*
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* Copy/paste instructions:
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*
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* copy RA,RB
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* Copy contents of address (RA) + effective_address(RB)
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* to internal copy-buffer.
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*
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* paste RA,RB
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* Paste contents of internal copy-buffer to the address
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* (RA) + effective_address(RB)
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*/
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static inline int vas_copy(void *crb, int offset)
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{
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asm volatile(PPC_COPY(%0, %1)";"
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:
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: "b" (offset), "b" (crb)
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: "memory");
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return 0;
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}
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static inline int vas_paste(void *paste_address, int offset)
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{
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u32 cr;
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cr = 0;
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asm volatile(PPC_PASTE(%1, %2)";"
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"mfocrf %0, 0x80;"
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: "=r" (cr)
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: "b" (offset), "b" (paste_address)
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: "memory", "cr0");
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return (cr >> CR0_SHIFT) & CR0_MASK;
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}
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