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| author | David Woodhouse <dwmw2@infradead.org> | 2007-08-23 10:43:14 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-08-23 10:43:14 +0100 |
| commit | ac0c955d5048c2c580fa7166a89133f0fd76c125 (patch) | |
| tree | 041ac4fb544c7244a1a0b35c8ceabc142d5645c1 /arch/sparc64/lib/NG2copy_from_user.S | |
| parent | 68d09b1b6780415d82160f6b6d88e82bd724e691 (diff) | |
| parent | b377fd3982ad957c796758a90e2988401a884241 (diff) | |
| download | linux-ac0c955d5048c2c580fa7166a89133f0fd76c125.tar.bz2 | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/sparc64/lib/NG2copy_from_user.S')
| -rw-r--r-- | arch/sparc64/lib/NG2copy_from_user.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/sparc64/lib/NG2copy_from_user.S b/arch/sparc64/lib/NG2copy_from_user.S new file mode 100644 index 000000000000..c77ef5f22102 --- /dev/null +++ b/arch/sparc64/lib/NG2copy_from_user.S @@ -0,0 +1,40 @@ +/* NG2copy_from_user.S: Niagara-2 optimized copy from userspace. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#define EX_LD(x) \ +98: x; \ + .section .fixup; \ + .align 4; \ +99: wr %g0, ASI_AIUS, %asi;\ + retl; \ + mov 1, %o0; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, 99b; \ + .text; \ + .align 4; + +#ifndef ASI_AIUS +#define ASI_AIUS 0x11 +#endif + +#ifndef ASI_BLK_AIUS_4V +#define ASI_BLK_AIUS_4V 0x17 +#endif + +#define FUNC_NAME NG2copy_from_user +#define LOAD(type,addr,dest) type##a [addr] %asi, dest +#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS_4V, dest +#define EX_RETVAL(x) 0 + +#ifdef __KERNEL__ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, memcpy_user_stub; \ + nop +#endif + +#include "NG2memcpy.S" |