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