| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * Copyright 2016-17 IBM Corp. |
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| 4 | */ |
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| 5 | #include <asm/ppc-opcode.h> |
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| 6 | #include <asm/reg.h> |
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| 7 | |
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| 8 | /* |
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| 9 | * Copy/paste instructions: |
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| 10 | * |
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| 11 | * copy RA,RB |
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| 12 | * Copy contents of address (RA) + effective_address(RB) |
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| 13 | * to internal copy-buffer. |
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| 14 | * |
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| 15 | * paste RA,RB |
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| 16 | * Paste contents of internal copy-buffer to the address |
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| 17 | * (RA) + effective_address(RB) |
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| 18 | */ |
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| 19 | static inline int vas_copy(void *crb, int offset) |
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| 20 | { |
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| 21 | asm volatile(PPC_COPY(%0, %1)";" |
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| 22 | : |
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| 23 | : "b" (offset), "b" (crb) |
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| 24 | : "memory" ); |
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| 25 | |
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| 26 | return 0; |
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| 27 | } |
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| 28 | |
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| 29 | static inline int vas_paste(void *paste_address, int offset) |
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| 30 | { |
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| 31 | u32 cr; |
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| 32 | |
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| 33 | cr = 0; |
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| 34 | asm volatile(PPC_PASTE(%1, %2)";" |
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| 35 | "mfocrf %0, 0x80;" |
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| 36 | : "=r" (cr) |
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| 37 | : "b" (offset), "b" (paste_address) |
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| 38 | : "memory" , "cr0" ); |
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| 39 | |
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| 40 | /* We mask with 0xE to ignore SO */ |
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| 41 | return (cr >> CR0_SHIFT) & 0xE; |
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| 42 | } |
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| 43 | |
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