diff options
Diffstat (limited to 'arch/sparc64/lib/VIScopy.S')
| -rw-r--r-- | arch/sparc64/lib/VIScopy.S | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/arch/sparc64/lib/VIScopy.S b/arch/sparc64/lib/VIScopy.S index 56634f83f..b944a0ae7 100644 --- a/arch/sparc64/lib/VIScopy.S +++ b/arch/sparc64/lib/VIScopy.S @@ -1,4 +1,4 @@ -/* $Id: VIScopy.S,v 1.23 2000/03/26 09:13:49 davem Exp $ +/* $Id: VIScopy.S,v 1.25 2000/11/01 09:29:19 davem Exp $ * VIScopy.S: High speed copy operations utilizing the UltraSparc * Visual Instruction Set. * @@ -361,6 +361,38 @@ bcopy: or %o0, 0, %g3 ! IEU0 Group clr %o0 ! IEU0 +#ifdef __KERNEL__ +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define ULTRA3_DO_PATCH(OLD, NEW) \ + sethi %hi(NEW), %g1; \ + or %g1, %lo(NEW), %g1; \ + sethi %hi(OLD), %g2; \ + or %g2, %lo(OLD), %g2; \ + sub %g1, %g2, %g1; \ + sethi %hi(BRANCH_ALWAYS), %g3; \ + srl %g1, 2, %g1; \ + or %g3, %lo(BRANCH_ALWAYS), %g3; \ + or %g3, %g1, %g3; \ + stw %g3, [%g2]; \ + sethi %hi(NOP), %g3; \ + or %g3, %lo(NOP), %g3; \ + stw %g3, [%g2 + 0x4]; \ + flush %g2; + + .globl cheetah_patch_copyops +cheetah_patch_copyops: + ULTRA3_DO_PATCH(memcpy, U3memcpy) + ULTRA3_DO_PATCH(__copy_from_user, U3copy_from_user) + ULTRA3_DO_PATCH(__copy_to_user, U3copy_to_user) + ULTRA3_DO_PATCH(__copy_in_user, U3copy_in_user) + retl + nop +#undef BRANCH_ALWAYS +#undef NOP +#undef ULTRA3_DO_PATCH +#endif /* __KERNEL__ */ + .align 32 #ifdef __KERNEL__ __memcpy_384plus: |