GNU Linux-libre 4.9.296-gnu1
[releases.git] / arch / sparc / lib / NG4patch.S
1 /* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant.
2  *
3  * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
4  */
5
6 #define BRANCH_ALWAYS   0x10680000
7 #define NOP             0x01000000
8 #define NG_DO_PATCH(OLD, NEW)   \
9         sethi   %hi(NEW), %g1; \
10         or      %g1, %lo(NEW), %g1; \
11         sethi   %hi(OLD), %g2; \
12         or      %g2, %lo(OLD), %g2; \
13         sub     %g1, %g2, %g1; \
14         sethi   %hi(BRANCH_ALWAYS), %g3; \
15         sll     %g1, 11, %g1; \
16         srl     %g1, 11 + 2, %g1; \
17         or      %g3, %lo(BRANCH_ALWAYS), %g3; \
18         or      %g3, %g1, %g3; \
19         stw     %g3, [%g2]; \
20         sethi   %hi(NOP), %g3; \
21         or      %g3, %lo(NOP), %g3; \
22         stw     %g3, [%g2 + 0x4]; \
23         flush   %g2;
24
25         .globl  niagara4_patch_copyops
26         .type   niagara4_patch_copyops,#function
27 niagara4_patch_copyops:
28         NG_DO_PATCH(memcpy, NG4memcpy)
29         NG_DO_PATCH(___copy_from_user, NG4copy_from_user)
30         NG_DO_PATCH(___copy_to_user, NG4copy_to_user)
31         retl
32          nop
33         .size   niagara4_patch_copyops,.-niagara4_patch_copyops
34
35         .globl  niagara4_patch_bzero
36         .type   niagara4_patch_bzero,#function
37 niagara4_patch_bzero:
38         NG_DO_PATCH(memset, NG4memset)
39         NG_DO_PATCH(__bzero, NG4bzero)
40         NG_DO_PATCH(__clear_user, NGclear_user)
41         NG_DO_PATCH(tsb_init, NGtsb_init)
42         retl
43          nop
44         .size   niagara4_patch_bzero,.-niagara4_patch_bzero
45
46         .globl  niagara4_patch_pageops
47         .type   niagara4_patch_pageops,#function
48 niagara4_patch_pageops:
49         NG_DO_PATCH(copy_user_page, NG4copy_user_page)
50         NG_DO_PATCH(_clear_page, NG4clear_page)
51         NG_DO_PATCH(clear_user_page, NG4clear_user_page)
52         retl
53          nop
54         .size   niagara4_patch_pageops,.-niagara4_patch_pageops