Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _SELFTESTS_POWERPC_INSTRUCTIONS_H
2#define _SELFTESTS_POWERPC_INSTRUCTIONS_H
3
4#include <stdio.h>
5#include <stdlib.h>
6
7/* This defines the "copy" instruction from Power ISA 3.0 Book II, section 4.4. */
8#define __COPY(RA, RB, L) \
9 (0x7c00060c | (RA) << (31-15) | (RB) << (31-20) | (L) << (31-10))
10#define COPY(RA, RB, L) \
11 .long __COPY((RA), (RB), (L))
12
13static inline void copy(void *i)
14{
15 asm volatile(str(COPY(0, %0, 0))";"
16 :
17 : "b" (i)
18 : "memory"
19 );
20}
21
22static inline void copy_first(void *i)
23{
24 asm volatile(str(COPY(0, %0, 1))";"
25 :
26 : "b" (i)
27 : "memory"
28 );
29}
30
31/* This defines the "paste" instruction from Power ISA 3.0 Book II, section 4.4. */
32#define __PASTE(RA, RB, L, RC) \
33 (0x7c00070c | (RA) << (31-15) | (RB) << (31-20) | (L) << (31-10) | (RC) << (31-31))
34#define PASTE(RA, RB, L, RC) \
35 .long __PASTE((RA), (RB), (L), (RC))
36
37static inline int paste(void *i)
38{
39 int cr;
40
41 asm volatile(str(PASTE(0, %1, 0, 0))";"
42 "mfcr %0;"
43 : "=r" (cr)
44 : "b" (i)
45 : "memory"
46 );
47 return cr;
48}
49
50static inline int paste_last(void *i)
51{
52 int cr;
53
54 asm volatile(str(PASTE(0, %1, 1, 1))";"
55 "mfcr %0;"
56 : "=r" (cr)
57 : "b" (i)
58 : "memory"
59 );
60 return cr;
61}
62
63#define PPC_INST_COPY __COPY(0, 0, 0)
64#define PPC_INST_COPY_FIRST __COPY(0, 0, 1)
65#define PPC_INST_PASTE __PASTE(0, 0, 0, 0)
66#define PPC_INST_PASTE_LAST __PASTE(0, 0, 1, 1)
67
68#endif /* _SELFTESTS_POWERPC_INSTRUCTIONS_H */