1/* SPDX-License-Identifier: GPL-2.0 */
 2/* NGpatch.S: Patch Ultra-I routines with Niagara variant.
 3 *
 4 * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
 5 */
 6
 7#define BRANCH_ALWAYS	0x10680000
 8#define NOP		0x01000000
 9#define NG_DO_PATCH(OLD, NEW)	\
10	sethi	%hi(NEW), %g1; \
11	or	%g1, %lo(NEW), %g1; \
12	sethi	%hi(OLD), %g2; \
13	or	%g2, %lo(OLD), %g2; \
14	sub	%g1, %g2, %g1; \
15	sethi	%hi(BRANCH_ALWAYS), %g3; \
16	sll	%g1, 11, %g1; \
17	srl	%g1, 11 + 2, %g1; \
18	or	%g3, %lo(BRANCH_ALWAYS), %g3; \
19	or	%g3, %g1, %g3; \
20	stw	%g3, [%g2]; \
21	sethi	%hi(NOP), %g3; \
22	or	%g3, %lo(NOP), %g3; \
23	stw	%g3, [%g2 + 0x4]; \
24	flush	%g2;
25
26	.globl	niagara_patch_copyops
27	.type	niagara_patch_copyops,#function
28niagara_patch_copyops:
29	NG_DO_PATCH(memcpy, NGmemcpy)
30	NG_DO_PATCH(raw_copy_from_user, NGcopy_from_user)
31	NG_DO_PATCH(raw_copy_to_user, NGcopy_to_user)
32	retl
33	 nop
34	.size	niagara_patch_copyops,.-niagara_patch_copyops

 
 1/* NGpatch.S: Patch Ultra-I routines with Niagara variant.
 2 *
 3 * Copyright (C) 2006 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	niagara_patch_copyops
26	.type	niagara_patch_copyops,#function
27niagara_patch_copyops:
28	NG_DO_PATCH(memcpy, NGmemcpy)
29	NG_DO_PATCH(___copy_from_user, NGcopy_from_user)
30	NG_DO_PATCH(___copy_to_user, NGcopy_to_user)
31	retl
32	 nop
33	.size	niagara_patch_copyops,.-niagara_patch_copyops