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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#ifndef __CPU_H
#define __CPU_H
/* Used in boot_abort.S, will need something better for KVM */
#define HSPRG0 304
/* XXX FIXME: Can be more efficient, no dcbst nor loop needed on P7 */
/* This macro uses r0 */
#define FLUSH_CACHE(r, n) add n, n, r; \
addi n, n, 127; \
rlwinm r, r, 0,0,24; \
rlwinm n, n, 0,0,24; \
sub n, n, r; \
srwi n, n, 7; \
mtctr n; \
0: dcbst 0, r; \
sync; \
icbi 0, r; \
sync; \
isync; \
addi r, r, 128; \
bdnz 0b;
#ifndef __ASSEMBLER__
#define STRINGIFY(x...) #x
#define EXPAND(x) STRINGIFY(x)
static inline void flush_cache(void* r, long n)
{
asm volatile(EXPAND(FLUSH_CACHE(%0, %1))
: "+r"(r), "+r"(n)
:: "memory", "cc", "r0", "ctr");
}
static inline void eieio(void)
{
asm volatile ("eieio":::"memory");
}
static inline void barrier(void)
{
asm volatile("" : : : "memory");
}
#define cpu_relax() barrier()
static inline void sync(void)
{
asm volatile ("sync" ::: "memory");
}
#define mb() sync()
#endif /* __ASSEMBLER__ */
#endif
|
