forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 4
/
copypage_64.S
113 lines (107 loc) · 2.01 KB
/
copypage_64.S
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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2008 Mark Nelson, IBM Corp.
*/
#include <asm/page.h>
#include <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
#include <asm/export.h>
#include <asm/feature-fixups.h>
.section ".toc","aw"
PPC64_CACHES:
.tc ppc64_caches[TC],ppc64_caches
.section ".text"
_GLOBAL_TOC(copy_page)
BEGIN_FTR_SECTION
lis r5,PAGE_SIZE@h
FTR_SECTION_ELSE
#ifdef CONFIG_PPC_BOOK3S_64
b copypage_power7
#endif
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY)
ori r5,r5,PAGE_SIZE@l
BEGIN_FTR_SECTION
ld r10,PPC64_CACHES@toc(r2)
lwz r11,DCACHEL1LOGBLOCKSIZE(r10) /* log2 of cache block size */
lwz r12,DCACHEL1BLOCKSIZE(r10) /* get cache block size */
li r9,0
srd r8,r5,r11
mtctr r8
.Lsetup:
dcbt r9,r4
dcbz r9,r3
add r9,r9,r12
bdnz .Lsetup
END_FTR_SECTION_IFSET(CPU_FTR_CP_USE_DCBTZ)
addi r3,r3,-8
srdi r8,r5,7 /* page is copied in 128 byte strides */
addi r8,r8,-1 /* one stride copied outside loop */
mtctr r8
ld r5,0(r4)
ld r6,8(r4)
ld r7,16(r4)
ldu r8,24(r4)
1: std r5,8(r3)
std r6,16(r3)
ld r9,8(r4)
ld r10,16(r4)
std r7,24(r3)
std r8,32(r3)
ld r11,24(r4)
ld r12,32(r4)
std r9,40(r3)
std r10,48(r3)
ld r5,40(r4)
ld r6,48(r4)
std r11,56(r3)
std r12,64(r3)
ld r7,56(r4)
ld r8,64(r4)
std r5,72(r3)
std r6,80(r3)
ld r9,72(r4)
ld r10,80(r4)
std r7,88(r3)
std r8,96(r3)
ld r11,88(r4)
ld r12,96(r4)
std r9,104(r3)
std r10,112(r3)
ld r5,104(r4)
ld r6,112(r4)
std r11,120(r3)
stdu r12,128(r3)
ld r7,120(r4)
ldu r8,128(r4)
bdnz 1b
std r5,8(r3)
std r6,16(r3)
ld r9,8(r4)
ld r10,16(r4)
std r7,24(r3)
std r8,32(r3)
ld r11,24(r4)
ld r12,32(r4)
std r9,40(r3)
std r10,48(r3)
ld r5,40(r4)
ld r6,48(r4)
std r11,56(r3)
std r12,64(r3)
ld r7,56(r4)
ld r8,64(r4)
std r5,72(r3)
std r6,80(r3)
ld r9,72(r4)
ld r10,80(r4)
std r7,88(r3)
std r8,96(r3)
ld r11,88(r4)
ld r12,96(r4)
std r9,104(r3)
std r10,112(r3)
std r11,120(r3)
std r12,128(r3)
blr
EXPORT_SYMBOL(copy_page)