blob: c9a50362343107b079875233faac064301435084 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Copyright 2016-17 IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <asm/ppc-opcode.h>
#define CR0_SHIFT 28
#define CR0_MASK 0xF
/*
* 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");
return (cr >> CR0_SHIFT) & CR0_MASK;
}
|
