1/* SPDX-License-Identifier: GPL-2.0 */
 2/* NG4patch.S: Patch Ultra-I routines with Niagara-4 variant.
 3 *
 4 * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
 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	.globl	niagara4_patch_copyops
29	.type	niagara4_patch_copyops,#function
30niagara4_patch_copyops:
31	NG_DO_PATCH(memcpy, NG4memcpy)
32	NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user)
33	NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user)
34	retl
35	 nop
36	.size	niagara4_patch_copyops,.-niagara4_patch_copyops
37
38	.globl	niagara4_patch_bzero
39	.type	niagara4_patch_bzero,#function
40niagara4_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
49	.globl	niagara4_patch_pageops
50	.type	niagara4_patch_pageops,#function
51niagara4_patch_pageops:
52	NG_DO_PATCH(copy_user_page, NG4copy_user_page)
53	NG_DO_PATCH(_clear_page, NG4clear_page)
54	NG_DO_PATCH(clear_user_page, NG4clear_user_page)
55	retl
56	 nop
57	.size	niagara4_patch_pageops,.-niagara4_patch_pageops
58
59ENTRY(niagara4_patch_fls)
60	NG_DO_PATCH(fls, NG4fls)
61	NG_DO_PATCH(__fls, __NG4fls)
62	retl
63	 nop
64ENDPROC(niagara4_patch_fls)

 
 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
27niagara4_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
37niagara4_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
48niagara4_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