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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/sparc/lib/U1copy_to_user.S | |
| parent | Initial commit. (diff) | |
| download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip | |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sparc/lib/U1copy_to_user.S')
| -rw-r--r-- | arch/sparc/lib/U1copy_to_user.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/sparc/lib/U1copy_to_user.S b/arch/sparc/lib/U1copy_to_user.S new file mode 100644 index 0000000000..15169851e7 --- /dev/null +++ b/arch/sparc/lib/U1copy_to_user.S @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* U1copy_to_user.S: UltraSparc-I/II/IIi/IIe optimized copy to userspace. + * + * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) + */ + +#define EX_ST(x,y) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, y; \ + .text; \ + .align 4; + +#define EX_ST_FP(x,y) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, y; \ + .text; \ + .align 4; + +#define FUNC_NAME raw_copy_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, raw_copy_in_user; \ + nop; \ + +#include "U1memcpy.S" |