ARM: mach-shmobile: sh7377 SDHI vector merge
[linux-2.6.git] / arch / sparc / lib / GENpatch.S
1 /* GENpatch.S: Patch Ultra-I routines with generic variant.
2  *
3  * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
4  */
5
6 #define BRANCH_ALWAYS   0x10680000
7 #define NOP             0x01000000
8 #define GEN_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  generic_patch_copyops
26         .type   generic_patch_copyops,#function
27 generic_patch_copyops:
28         GEN_DO_PATCH(memcpy, GENmemcpy)
29         GEN_DO_PATCH(___copy_from_user, GENcopy_from_user)
30         GEN_DO_PATCH(___copy_to_user, GENcopy_to_user)
31         retl
32          nop
33         .size   generic_patch_copyops,.-generic_patch_copyops