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| author | Ingo Molnar <mingo@elte.hu> | 2009-01-02 22:41:36 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-02 22:41:36 +0100 |
| commit | 923a789b49c7269a0245d5af6afe486188d940df (patch) | |
| tree | c3f168427372e64f7467a794f313416da5086ba0 /arch/sparc/lib/U3copy_to_user.S | |
| parent | 103ceffb9501531f6931df6aebc11a05189201f0 (diff) | |
| parent | b840d79631c882786925303c2b0f4fefc31845ed (diff) | |
Merge branch 'linus' into x86/cleanups
Conflicts:
arch/x86/kernel/reboot.c
Diffstat (limited to 'arch/sparc/lib/U3copy_to_user.S')
| -rw-r--r-- | arch/sparc/lib/U3copy_to_user.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/sparc/lib/U3copy_to_user.S b/arch/sparc/lib/U3copy_to_user.S new file mode 100644 index 00000000000..2334f111bb0 --- /dev/null +++ b/arch/sparc/lib/U3copy_to_user.S @@ -0,0 +1,33 @@ +/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace. + * + * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) + */ + +#define EX_ST(x) \ +98: x; \ + .section .fixup; \ + .align 4; \ +99: retl; \ + mov 1, %o0; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, 99b; \ + .text; \ + .align 4; + +#define FUNC_NAME U3copy_to_user +#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS +#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS +#define EX_RETVAL(x) 0 + + /* Writing to %asi is _expensive_ so we hardcode it. + * Reading %asi to check for KERNEL_DS is comparatively + * cheap. + */ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, memcpy_user_stub; \ + nop; \ + +#include "U3memcpy.S" |