| /* 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) \ |
| 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 ___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, memcpy_user_stub; \ |
| nop; \ |
| |
| #include "U1memcpy.S" |
