1 /*
2 * M7patch.S: Patch generic routines with M7 v
3 *
4 * Copyright (c) 2016, Oracle and/or its affil
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
31 NG_DO_PATCH(raw_copy_to_user, M7copy_t
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_us
47 NG_DO_PATCH(_clear_page, M7clear_page)
48 NG_DO_PATCH(clear_user_page, M7clear_u
49 retl
50 nop
51 ENDPROC(m7_patch_pageops)
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