1 /* SPDX-License-Identifier: GPL-2.0-only */ !! 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* 2 /*
3 * Copyright (C) 2012 ARM Ltd. !! 3 * arch/alpha/lib/copy_page.S
4 */ <<
5 <<
6 #include <linux/linkage.h> <<
7 #include <linux/const.h> <<
8 #include <asm/assembler.h> <<
9 #include <asm/page.h> <<
10 #include <asm/cpufeature.h> <<
11 #include <asm/alternative.h> <<
12 <<
13 /* <<
14 * Copy a page from src to dest (both are page <<
15 * 4 *
16 * Parameters: !! 5 * Copy an entire page.
17 * x0 - dest <<
18 * x1 - src <<
19 */ 6 */
20 SYM_FUNC_START(__pi_copy_page) !! 7 #include <linux/export.h>
21 ldp x2, x3, [x1] !! 8 .text
22 ldp x4, x5, [x1, #16] !! 9 .align 4
23 ldp x6, x7, [x1, #32] !! 10 .global copy_page
24 ldp x8, x9, [x1, #48] !! 11 .ent copy_page
25 ldp x10, x11, [x1, #64] !! 12 copy_page:
26 ldp x12, x13, [x1, #80] !! 13 .prologue 0
27 ldp x14, x15, [x1, #96] !! 14
28 ldp x16, x17, [x1, #112] !! 15 lda $18,128
29 !! 16 nop
30 add x0, x0, #256 !! 17 unop
31 add x1, x1, #128 !! 18 nop
32 1: !! 19
33 tst x0, #(PAGE_SIZE - 1) !! 20 1: ldq $0,0($17)
34 !! 21 ldq $1,8($17)
35 stnp x2, x3, [x0, #-256] !! 22 ldq $2,16($17)
36 ldp x2, x3, [x1] !! 23 ldq $3,24($17)
37 stnp x4, x5, [x0, #16 - 256] !! 24
38 ldp x4, x5, [x1, #16] !! 25 ldq $4,32($17)
39 stnp x6, x7, [x0, #32 - 256] !! 26 ldq $5,40($17)
40 ldp x6, x7, [x1, #32] !! 27 ldq $6,48($17)
41 stnp x8, x9, [x0, #48 - 256] !! 28 ldq $7,56($17)
42 ldp x8, x9, [x1, #48] !! 29
43 stnp x10, x11, [x0, #64 - 256] !! 30 stq $0,0($16)
44 ldp x10, x11, [x1, #64] !! 31 subq $18,1,$18
45 stnp x12, x13, [x0, #80 - 256] !! 32 stq $1,8($16)
46 ldp x12, x13, [x1, #80] !! 33 addq $17,64,$17
47 stnp x14, x15, [x0, #96 - 256] !! 34
48 ldp x14, x15, [x1, #96] !! 35 stq $2,16($16)
49 stnp x16, x17, [x0, #112 - 256] !! 36 stq $3,24($16)
50 ldp x16, x17, [x1, #112] !! 37 stq $4,32($16)
51 !! 38 stq $5,40($16)
52 add x0, x0, #128 !! 39
53 add x1, x1, #128 !! 40 stq $6,48($16)
54 !! 41 stq $7,56($16)
55 b.ne 1b !! 42 addq $16,64,$16
56 !! 43 bne $18, 1b
57 stnp x2, x3, [x0, #-256] <<
58 stnp x4, x5, [x0, #16 - 256] <<
59 stnp x6, x7, [x0, #32 - 256] <<
60 stnp x8, x9, [x0, #48 - 256] <<
61 stnp x10, x11, [x0, #64 - 256] <<
62 stnp x12, x13, [x0, #80 - 256] <<
63 stnp x14, x15, [x0, #96 - 256] <<
64 stnp x16, x17, [x0, #112 - 256] <<
65 44
66 ret 45 ret
67 SYM_FUNC_END(__pi_copy_page) !! 46 nop
68 SYM_FUNC_ALIAS(copy_page, __pi_copy_page) !! 47 unop
69 EXPORT_SYMBOL(copy_page) !! 48 nop
>> 49
>> 50 .end copy_page
>> 51 EXPORT_SYMBOL(copy_page)
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