1 /*
2 * Copyright 2016-17 IBM Corp.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9 #include <asm/ppc-opcode.h>
10 #include <asm/reg.h>
11
12 /*
13 * Copy/paste instructions:
14 *
15 * copy RA,RB
16 * Copy contents of address (RA) + effective_address(RB)
17 * to internal copy-buffer.
18 *
19 * paste RA,RB
20 * Paste contents of internal copy-buffer to the address
21 * (RA) + effective_address(RB)
22 */
vas_copy(void * crb,int offset)23 static inline int vas_copy(void *crb, int offset)
24 {
25 asm volatile(PPC_COPY(%0, %1)";"
26 :
27 : "b" (offset), "b" (crb)
28 : "memory");
29
30 return 0;
31 }
32
vas_paste(void * paste_address,int offset)33 static inline int vas_paste(void *paste_address, int offset)
34 {
35 u32 cr;
36
37 cr = 0;
38 asm volatile(PPC_PASTE(%1, %2)";"
39 "mfocrf %0, 0x80;"
40 : "=r" (cr)
41 : "b" (offset), "b" (paste_address)
42 : "memory", "cr0");
43
44 /* We mask with 0xE to ignore SO */
45 return (cr >> CR0_SHIFT) & 0xE;
46 }
47
