1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NG4patch.S: Patch Ultra-I routines with Nia 2 /* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant.
3 * 3 *
4 * Copyright (C) 2012 David S. Miller <davem@da 4 * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
5 */ 5 */
6 6
7 #include <linux/linkage.h> 7 #include <linux/linkage.h>
8 8
9 #define BRANCH_ALWAYS 0x10680000 9 #define BRANCH_ALWAYS 0x10680000
10 #define NOP 0x01000000 10 #define NOP 0x01000000
11 #define NG_DO_PATCH(OLD, NEW) \ 11 #define NG_DO_PATCH(OLD, NEW) \
12 sethi %hi(NEW), %g1; \ 12 sethi %hi(NEW), %g1; \
13 or %g1, %lo(NEW), %g1; \ 13 or %g1, %lo(NEW), %g1; \
14 sethi %hi(OLD), %g2; \ 14 sethi %hi(OLD), %g2; \
15 or %g2, %lo(OLD), %g2; \ 15 or %g2, %lo(OLD), %g2; \
16 sub %g1, %g2, %g1; \ 16 sub %g1, %g2, %g1; \
17 sethi %hi(BRANCH_ALWAYS), %g3; \ 17 sethi %hi(BRANCH_ALWAYS), %g3; \
18 sll %g1, 11, %g1; \ 18 sll %g1, 11, %g1; \
19 srl %g1, 11 + 2, %g1; \ 19 srl %g1, 11 + 2, %g1; \
20 or %g3, %lo(BRANCH_ALWAYS), %g3; 20 or %g3, %lo(BRANCH_ALWAYS), %g3; \
21 or %g3, %g1, %g3; \ 21 or %g3, %g1, %g3; \
22 stw %g3, [%g2]; \ 22 stw %g3, [%g2]; \
23 sethi %hi(NOP), %g3; \ 23 sethi %hi(NOP), %g3; \
24 or %g3, %lo(NOP), %g3; \ 24 or %g3, %lo(NOP), %g3; \
25 stw %g3, [%g2 + 0x4]; \ 25 stw %g3, [%g2 + 0x4]; \
26 flush %g2; 26 flush %g2;
27 27
28 .globl niagara4_patch_copyops 28 .globl niagara4_patch_copyops
29 .type niagara4_patch_copyops,#functi 29 .type niagara4_patch_copyops,#function
30 niagara4_patch_copyops: 30 niagara4_patch_copyops:
31 NG_DO_PATCH(memcpy, NG4memcpy) 31 NG_DO_PATCH(memcpy, NG4memcpy)
32 NG_DO_PATCH(raw_copy_from_user, NG4cop 32 NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user)
33 NG_DO_PATCH(raw_copy_to_user, NG4copy_ 33 NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user)
34 retl 34 retl
35 nop 35 nop
36 .size niagara4_patch_copyops,.-niaga 36 .size niagara4_patch_copyops,.-niagara4_patch_copyops
37 37
38 .globl niagara4_patch_bzero 38 .globl niagara4_patch_bzero
39 .type niagara4_patch_bzero,#function 39 .type niagara4_patch_bzero,#function
40 niagara4_patch_bzero: 40 niagara4_patch_bzero:
41 NG_DO_PATCH(memset, NG4memset) 41 NG_DO_PATCH(memset, NG4memset)
42 NG_DO_PATCH(__bzero, NG4bzero) 42 NG_DO_PATCH(__bzero, NG4bzero)
43 NG_DO_PATCH(__clear_user, NGclear_user 43 NG_DO_PATCH(__clear_user, NGclear_user)
44 NG_DO_PATCH(tsb_init, NGtsb_init) 44 NG_DO_PATCH(tsb_init, NGtsb_init)
45 retl 45 retl
46 nop 46 nop
47 .size niagara4_patch_bzero,.-niagara 47 .size niagara4_patch_bzero,.-niagara4_patch_bzero
48 48
49 .globl niagara4_patch_pageops 49 .globl niagara4_patch_pageops
50 .type niagara4_patch_pageops,#functi 50 .type niagara4_patch_pageops,#function
51 niagara4_patch_pageops: 51 niagara4_patch_pageops:
52 NG_DO_PATCH(copy_user_page, NG4copy_us 52 NG_DO_PATCH(copy_user_page, NG4copy_user_page)
53 NG_DO_PATCH(_clear_page, NG4clear_page 53 NG_DO_PATCH(_clear_page, NG4clear_page)
54 NG_DO_PATCH(clear_user_page, NG4clear_ 54 NG_DO_PATCH(clear_user_page, NG4clear_user_page)
55 retl 55 retl
56 nop 56 nop
57 .size niagara4_patch_pageops,.-niaga 57 .size niagara4_patch_pageops,.-niagara4_patch_pageops
58 58
59 ENTRY(niagara4_patch_fls) 59 ENTRY(niagara4_patch_fls)
60 NG_DO_PATCH(fls, NG4fls) 60 NG_DO_PATCH(fls, NG4fls)
61 NG_DO_PATCH(__fls, __NG4fls) 61 NG_DO_PATCH(__fls, __NG4fls)
62 retl 62 retl
63 nop 63 nop
64 ENDPROC(niagara4_patch_fls) 64 ENDPROC(niagara4_patch_fls)
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