treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
[muen/linux.git] / arch / powerpc / lib / copypage_64.S
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright (C) 2008 Mark Nelson, IBM Corp.
4  */
5 #include <asm/page.h>
6 #include <asm/processor.h>
7 #include <asm/ppc_asm.h>
8 #include <asm/asm-offsets.h>
9 #include <asm/export.h>
10 #include <asm/feature-fixups.h>
11
12         .section        ".toc","aw"
13 PPC64_CACHES:
14         .tc             ppc64_caches[TC],ppc64_caches
15         .section        ".text"
16
17 _GLOBAL_TOC(copy_page)
18 BEGIN_FTR_SECTION
19         lis     r5,PAGE_SIZE@h
20 FTR_SECTION_ELSE
21 #ifdef CONFIG_PPC_BOOK3S_64
22         b       copypage_power7
23 #endif
24 ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY)
25         ori     r5,r5,PAGE_SIZE@l
26 BEGIN_FTR_SECTION
27         ld      r10,PPC64_CACHES@toc(r2)
28         lwz     r11,DCACHEL1LOGBLOCKSIZE(r10)   /* log2 of cache block size */
29         lwz     r12,DCACHEL1BLOCKSIZE(r10)      /* get cache block size */
30         li      r9,0
31         srd     r8,r5,r11
32
33         mtctr   r8
34 .Lsetup:
35         dcbt    r9,r4
36         dcbz    r9,r3
37         add     r9,r9,r12
38         bdnz    .Lsetup
39 END_FTR_SECTION_IFSET(CPU_FTR_CP_USE_DCBTZ)
40         addi    r3,r3,-8
41         srdi    r8,r5,7         /* page is copied in 128 byte strides */
42         addi    r8,r8,-1        /* one stride copied outside loop */
43
44         mtctr   r8
45
46         ld      r5,0(r4)
47         ld      r6,8(r4)
48         ld      r7,16(r4)
49         ldu     r8,24(r4)
50 1:      std     r5,8(r3)
51         std     r6,16(r3)
52         ld      r9,8(r4)
53         ld      r10,16(r4)
54         std     r7,24(r3)
55         std     r8,32(r3)
56         ld      r11,24(r4)
57         ld      r12,32(r4)
58         std     r9,40(r3)
59         std     r10,48(r3)
60         ld      r5,40(r4)
61         ld      r6,48(r4)
62         std     r11,56(r3)
63         std     r12,64(r3)
64         ld      r7,56(r4)
65         ld      r8,64(r4)
66         std     r5,72(r3)
67         std     r6,80(r3)
68         ld      r9,72(r4)
69         ld      r10,80(r4)
70         std     r7,88(r3)
71         std     r8,96(r3)
72         ld      r11,88(r4)
73         ld      r12,96(r4)
74         std     r9,104(r3)
75         std     r10,112(r3)
76         ld      r5,104(r4)
77         ld      r6,112(r4)
78         std     r11,120(r3)
79         stdu    r12,128(r3)
80         ld      r7,120(r4)
81         ldu     r8,128(r4)
82         bdnz    1b
83
84         std     r5,8(r3)
85         std     r6,16(r3)
86         ld      r9,8(r4)
87         ld      r10,16(r4)
88         std     r7,24(r3)
89         std     r8,32(r3)
90         ld      r11,24(r4)
91         ld      r12,32(r4)
92         std     r9,40(r3)
93         std     r10,48(r3)
94         ld      r5,40(r4)
95         ld      r6,48(r4)
96         std     r11,56(r3)
97         std     r12,64(r3)
98         ld      r7,56(r4)
99         ld      r8,64(r4)
100         std     r5,72(r3)
101         std     r6,80(r3)
102         ld      r9,72(r4)
103         ld      r10,80(r4)
104         std     r7,88(r3)
105         std     r8,96(r3)
106         ld      r11,88(r4)
107         ld      r12,96(r4)
108         std     r9,104(r3)
109         std     r10,112(r3)
110         std     r11,120(r3)
111         std     r12,128(r3)
112         blr
113 EXPORT_SYMBOL(copy_page)