diff options
Diffstat (limited to 'arch/sparc/lib/U1copy_from_user.S')
| -rw-r--r-- | arch/sparc/lib/U1copy_from_user.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/sparc/lib/U1copy_from_user.S b/arch/sparc/lib/U1copy_from_user.S new file mode 100644 index 000000000..bf08d1c78 --- /dev/null +++ b/arch/sparc/lib/U1copy_from_user.S @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace. + * + * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com) + */ + +#define EX_LD(x,y) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, y; \ + .text; \ + .align 4; + +#define EX_LD_FP(x,y) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, y; \ + .text; \ + .align 4; + +#define FUNC_NAME raw_copy_from_user +#define LOAD(type,addr,dest) type##a [addr] %asi, dest +#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest +#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" |