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
28ENTRY(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
34ENDPROC(m7_patch_copyops)
35
36ENTRY(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
43ENDPROC(m7_patch_bzero)
44
45ENTRY(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
51ENDPROC(m7_patch_pageops)
52