1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NG4patch.S: Patch Ultra-I routines with Nia
3 *
4 * Copyright (C) 2012 David S. Miller <davem@da
5 */
6
7 #include <linux/linkage.h>
8
9 #define BRANCH_ALWAYS 0x10680000
10 #define NOP 0x01000000
11 #define NG_DO_PATCH(OLD, NEW) \
12 sethi %hi(NEW), %g1; \
13 or %g1, %lo(NEW), %g1; \
14 sethi %hi(OLD), %g2; \
15 or %g2, %lo(OLD), %g2; \
16 sub %g1, %g2, %g1; \
17 sethi %hi(BRANCH_ALWAYS), %g3; \
18 sll %g1, 11, %g1; \
19 srl %g1, 11 + 2, %g1; \
20 or %g3, %lo(BRANCH_ALWAYS), %g3;
21 or %g3, %g1, %g3; \
22 stw %g3, [%g2]; \
23 sethi %hi(NOP), %g3; \
24 or %g3, %lo(NOP), %g3; \
25 stw %g3, [%g2 + 0x4]; \
26 flush %g2;
27
28 .globl niagara4_patch_copyops
29 .type niagara4_patch_copyops,#functi
30 niagara4_patch_copyops:
31 NG_DO_PATCH(memcpy, NG4memcpy)
32 NG_DO_PATCH(raw_copy_from_user, NG4cop
33 NG_DO_PATCH(raw_copy_to_user, NG4copy_
34 retl
35 nop
36 .size niagara4_patch_copyops,.-niaga
37
38 .globl niagara4_patch_bzero
39 .type niagara4_patch_bzero,#function
40 niagara4_patch_bzero:
41 NG_DO_PATCH(memset, NG4memset)
42 NG_DO_PATCH(__bzero, NG4bzero)
43 NG_DO_PATCH(__clear_user, NGclear_user
44 NG_DO_PATCH(tsb_init, NGtsb_init)
45 retl
46 nop
47 .size niagara4_patch_bzero,.-niagara
48
49 .globl niagara4_patch_pageops
50 .type niagara4_patch_pageops,#functi
51 niagara4_patch_pageops:
52 NG_DO_PATCH(copy_user_page, NG4copy_us
53 NG_DO_PATCH(_clear_page, NG4clear_page
54 NG_DO_PATCH(clear_user_page, NG4clear_
55 retl
56 nop
57 .size niagara4_patch_pageops,.-niaga
58
59 ENTRY(niagara4_patch_fls)
60 NG_DO_PATCH(fls, NG4fls)
61 NG_DO_PATCH(__fls, __NG4fls)
62 retl
63 nop
64 ENDPROC(niagara4_patch_fls)
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.