1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2016-17 IBM Corp.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun #include <asm/ppc-opcode.h>
6*4882a593Smuzhiyun #include <asm/reg.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun /*
9*4882a593Smuzhiyun * Copy/paste instructions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * copy RA,RB
12*4882a593Smuzhiyun * Copy contents of address (RA) + effective_address(RB)
13*4882a593Smuzhiyun * to internal copy-buffer.
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * paste RA,RB
16*4882a593Smuzhiyun * Paste contents of internal copy-buffer to the address
17*4882a593Smuzhiyun * (RA) + effective_address(RB)
18*4882a593Smuzhiyun */
vas_copy(void * crb,int offset)19*4882a593Smuzhiyun static inline int vas_copy(void *crb, int offset)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun asm volatile(PPC_COPY(%0, %1)";"
22*4882a593Smuzhiyun :
23*4882a593Smuzhiyun : "b" (offset), "b" (crb)
24*4882a593Smuzhiyun : "memory");
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun return 0;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
vas_paste(void * paste_address,int offset)29*4882a593Smuzhiyun static inline int vas_paste(void *paste_address, int offset)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun u32 cr;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun cr = 0;
34*4882a593Smuzhiyun asm volatile(PPC_PASTE(%1, %2)";"
35*4882a593Smuzhiyun "mfocrf %0, 0x80;"
36*4882a593Smuzhiyun : "=r" (cr)
37*4882a593Smuzhiyun : "b" (offset), "b" (paste_address)
38*4882a593Smuzhiyun : "memory", "cr0");
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun /* We mask with 0xE to ignore SO */
41*4882a593Smuzhiyun return (cr >> CR0_SHIFT) & 0xE;
42*4882a593Smuzhiyun }
43