1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NG4copy_page.S: Niagara-4 optimized copy pa
3 *
4 * Copyright (C) 2012 (davem@davemloft.net)
5 */
6
7 #include <asm/asi.h>
8 #include <asm/page.h>
9
10 .text
11 .align 32
12
13 .register %g2, #scratch
14 .register %g3, #scratch
15
16 .globl NG4copy_user_page
17 NG4copy_user_page: /* %o0=dest, %o1=src,
18 prefetch [%o1 + 0x000], #n_read
19 prefetch [%o1 + 0x040], #n_read
20 prefetch [%o1 + 0x080], #n_read
21 prefetch [%o1 + 0x0c0], #n_read
22 set PAGE_SIZE, %g7
23 prefetch [%o1 + 0x100], #n_read
24 prefetch [%o1 + 0x140], #n_read
25 prefetch [%o1 + 0x180], #n_read
26 prefetch [%o1 + 0x1c0], #n_read
27 1:
28 ldx [%o1 + 0x00], %o2
29 subcc %g7, 0x40, %g7
30 ldx [%o1 + 0x08], %o3
31 ldx [%o1 + 0x10], %o4
32 ldx [%o1 + 0x18], %o5
33 ldx [%o1 + 0x20], %g1
34 stxa %o2, [%o0] ASI_ST_BLKI
35 add %o0, 0x08, %o0
36 ldx [%o1 + 0x28], %g2
37 stxa %o3, [%o0] ASI_ST_BLKI
38 add %o0, 0x08, %o0
39 ldx [%o1 + 0x30], %g3
40 stxa %o4, [%o0] ASI_ST_BLKI
41 add %o0, 0x08, %o0
42 ldx [%o1 + 0x38], %o2
43 add %o1, 0x40, %o1
44 stxa %o5, [%o0] ASI_ST_BLKI
45 add %o0, 0x08, %o0
46 stxa %g1, [%o0] ASI_ST_BLKI
47 add %o0, 0x08, %o0
48 stxa %g2, [%o0] ASI_ST_BLKI
49 add %o0, 0x08, %o0
50 stxa %g3, [%o0] ASI_ST_BLKI
51 add %o0, 0x08, %o0
52 stxa %o2, [%o0] ASI_ST_BLKI
53 add %o0, 0x08, %o0
54 bne,pt %icc, 1b
55 prefetch [%o1 + 0x200], #n_read
56 retl
57 membar #StoreLoad | #StoreSto
58 .size NG4copy_user_page,.-NG
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