forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.1 KiB
53 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* NG2copy_to_user.S: Niagara-2 optimized copy to userspace. |
|
* |
|
* Copyright (C) 2007 David S. Miller (davem@davemloft.net) |
|
*/ |
|
|
|
#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##_fp; \ |
|
.text; \ |
|
.align 4; |
|
|
|
#ifndef ASI_AIUS |
|
#define ASI_AIUS 0x11 |
|
#endif |
|
|
|
#ifndef ASI_BLK_AIUS_4V |
|
#define ASI_BLK_AIUS_4V 0x17 |
|
#endif |
|
|
|
#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS |
|
#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 |
|
#endif |
|
|
|
#define FUNC_NAME NG2copy_to_user |
|
#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS |
|
#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
|
#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS_4V |
|
#define EX_RETVAL(x) 0 |
|
|
|
#ifdef __KERNEL__ |
|
/* 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 |
|
#endif |
|
|
|
#include "NG2memcpy.S"
|
|
|