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