Root/arch/sparc/lib/U1copy_to_user.S

Source at commit 0de2b2b3be81048189a32f7a3d3ba0ba9ec817b6 created 11 years 11 months ago.
By Maarten ter Huurne, MIPS: JZ4740: Fixed value for round robin constant.
1/* U1copy_to_user.S: UltraSparc-I/II/IIi/IIe optimized copy to userspace.
2 *
3 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
4 */
5
6#define EX_ST(x) \
798: x; \
8    .section __ex_table,"a";\
9    .align 4; \
10    .word 98b, __retl_one; \
11    .text; \
12    .align 4;
13
14#define FUNC_NAME ___copy_to_user
15#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
16#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
17#define EX_RETVAL(x) 0
18
19    /* Writing to %asi is _expensive_ so we hardcode it.
20     * Reading %asi to check for KERNEL_DS is comparatively
21     * cheap.
22     */
23#define PREAMBLE \
24    rd %asi, %g1; \
25    cmp %g1, ASI_AIUS; \
26    bne,pn %icc, ___copy_in_user; \
27     nop; \
28
29#include "U1memcpy.S"
30

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