PageRenderTime 18ms CodeModel.GetById 11ms app.highlight 2ms RepoModel.GetById 1ms app.codeStats 0ms

/arch/sparc/lib/U3patch.S

https://bitbucket.org/ndreys/linux-sunxi
Assembly | 33 lines | 31 code | 2 blank | 0 comment | 0 complexity | 198351c10553472c4f7dcbf63af6e91f MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 1/* U3patch.S: Patch Ultra-I routines with Ultra-III variant.
 2 *
 3 * Copyright (C) 2004 David S. Miller <davem@redhat.com>
 4 */
 5
 6#define BRANCH_ALWAYS	0x10680000
 7#define NOP		0x01000000
 8#define ULTRA3_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	cheetah_patch_copyops
26	.type	cheetah_patch_copyops,#function
27cheetah_patch_copyops:
28	ULTRA3_DO_PATCH(memcpy, U3memcpy)
29	ULTRA3_DO_PATCH(___copy_from_user, U3copy_from_user)
30	ULTRA3_DO_PATCH(___copy_to_user, U3copy_to_user)
31	retl
32	 nop
33	.size	cheetah_patch_copyops,.-cheetah_patch_copyops