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
| /* SPDX-License-Identifier: GPL-2.0 */
| /* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant.
| *
| * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
| */
|
| #include <linux/linkage.h>
|
| #define BRANCH_ALWAYS 0x10680000
| #define NOP 0x01000000
| #define NG_DO_PATCH(OLD, NEW) \
| sethi %hi(NEW), %g1; \
| or %g1, %lo(NEW), %g1; \
| sethi %hi(OLD), %g2; \
| or %g2, %lo(OLD), %g2; \
| sub %g1, %g2, %g1; \
| sethi %hi(BRANCH_ALWAYS), %g3; \
| sll %g1, 11, %g1; \
| srl %g1, 11 + 2, %g1; \
| or %g3, %lo(BRANCH_ALWAYS), %g3; \
| or %g3, %g1, %g3; \
| stw %g3, [%g2]; \
| sethi %hi(NOP), %g3; \
| or %g3, %lo(NOP), %g3; \
| stw %g3, [%g2 + 0x4]; \
| flush %g2;
|
| .globl niagara4_patch_copyops
| .type niagara4_patch_copyops,#function
| niagara4_patch_copyops:
| NG_DO_PATCH(memcpy, NG4memcpy)
| NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user)
| NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user)
| retl
| nop
| .size niagara4_patch_copyops,.-niagara4_patch_copyops
|
| .globl niagara4_patch_bzero
| .type niagara4_patch_bzero,#function
| niagara4_patch_bzero:
| NG_DO_PATCH(memset, NG4memset)
| NG_DO_PATCH(__bzero, NG4bzero)
| NG_DO_PATCH(__clear_user, NGclear_user)
| NG_DO_PATCH(tsb_init, NGtsb_init)
| retl
| nop
| .size niagara4_patch_bzero,.-niagara4_patch_bzero
|
| .globl niagara4_patch_pageops
| .type niagara4_patch_pageops,#function
| niagara4_patch_pageops:
| NG_DO_PATCH(copy_user_page, NG4copy_user_page)
| NG_DO_PATCH(_clear_page, NG4clear_page)
| NG_DO_PATCH(clear_user_page, NG4clear_user_page)
| retl
| nop
| .size niagara4_patch_pageops,.-niagara4_patch_pageops
|
| ENTRY(niagara4_patch_fls)
| NG_DO_PATCH(fls, NG4fls)
| NG_DO_PATCH(__fls, __NG4fls)
| retl
| nop
| ENDPROC(niagara4_patch_fls)
|
|
