Commit | Line | Data |
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b3a04ed5 BM |
1 | /* |
2 | * M7patch.S: Patch generic routines with M7 variant. | |
3 | * | |
4 | * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. | |
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 | ENTRY(m7_patch_copyops) | |
29 | NG_DO_PATCH(memcpy, M7memcpy) | |
30 | NG_DO_PATCH(raw_copy_from_user, M7copy_from_user) | |
31 | NG_DO_PATCH(raw_copy_to_user, M7copy_to_user) | |
32 | retl | |
33 | nop | |
34 | ENDPROC(m7_patch_copyops) | |
35 | ||
36 | ENTRY(m7_patch_bzero) | |
37 | NG_DO_PATCH(memset, M7memset) | |
38 | NG_DO_PATCH(__bzero, M7bzero) | |
39 | NG_DO_PATCH(__clear_user, NGclear_user) | |
40 | NG_DO_PATCH(tsb_init, NGtsb_init) | |
41 | retl | |
42 | nop | |
43 | ENDPROC(m7_patch_bzero) | |
44 | ||
45 | ENTRY(m7_patch_pageops) | |
46 | NG_DO_PATCH(copy_user_page, NG4copy_user_page) | |
47 | NG_DO_PATCH(_clear_page, M7clear_page) | |
48 | NG_DO_PATCH(clear_user_page, M7clear_user_page) | |
49 | retl | |
50 | nop | |
51 | ENDPROC(m7_patch_pageops) |