mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-27 06:30:56 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
34 lines
777 B
ArmAsm
34 lines
777 B
ArmAsm
/* 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; \
|
|
.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"
|