| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * Copyright 2016-17 IBM Corp. |
| */ |
| #include <asm/ppc-opcode.h> |
| #include <asm/reg.h> |
| |
| /* |
| * Copy/paste instructions: |
| * |
| * copy RA,RB |
| * Copy contents of address (RA) + effective_address(RB) |
| * to internal copy-buffer. |
| * |
| * paste RA,RB |
| * Paste contents of internal copy-buffer to the address |
| * (RA) + effective_address(RB) |
| */ |
| static inline int vas_copy(void *crb, int offset) |
| { |
| asm volatile(PPC_COPY(%0, %1)";" |
| : |
| : "b" (offset), "b" (crb) |
| : "memory"); |
| |
| return 0; |
| } |
| |
| static inline int vas_paste(void *paste_address, int offset) |
| { |
| u32 cr; |
| |
| cr = 0; |
| asm volatile(PPC_PASTE(%1, %2)";" |
| "mfocrf %0, 0x80;" |
| : "=r" (cr) |
| : "b" (offset), "b" (paste_address) |
| : "memory", "cr0"); |
| |
| /* We mask with 0xE to ignore SO */ |
| return (cr >> CR0_SHIFT) & 0xE; |
| } |
