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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
ae2c6ca6 DM |
2 | /* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant. |
3 | * | |
4 | * Copyright (C) 2012 David S. Miller <davem@davemloft.net> | |
5 | */ | |
6 | ||
46ad8d2d VK |
7 | #include <linux/linkage.h> |
8 | ||
ae2c6ca6 DM |
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,#function | |
30 | niagara4_patch_copyops: | |
31 | NG_DO_PATCH(memcpy, NG4memcpy) | |
31af2f36 AV |
32 | NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user) |
33 | NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user) | |
ae2c6ca6 DM |
34 | retl |
35 | nop | |
36 | .size niagara4_patch_copyops,.-niagara4_patch_copyops | |
37 | ||
9f825962 DM |
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,.-niagara4_patch_bzero | |
48 | ||
ae2c6ca6 DM |
49 | .globl niagara4_patch_pageops |
50 | .type niagara4_patch_pageops,#function | |
51 | niagara4_patch_pageops: | |
52 | NG_DO_PATCH(copy_user_page, NG4copy_user_page) | |
9f825962 DM |
53 | NG_DO_PATCH(_clear_page, NG4clear_page) |
54 | NG_DO_PATCH(clear_user_page, NG4clear_user_page) | |
ae2c6ca6 DM |
55 | retl |
56 | nop | |
57 | .size niagara4_patch_pageops,.-niagara4_patch_pageops | |
46ad8d2d VK |
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) |