Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
David S. Miller | ae2c6ca | 2012-09-26 21:11:01 -0700 | [diff] [blame] | 2 | /* NG4copy_to_user.S: Niagara-4 optimized copy to userspace. |
| 3 | * |
| 4 | * Copyright (C) 2012 David S. Miller (davem@davemloft.net) |
| 5 | */ |
| 6 | |
David S. Miller | 95707704 | 2016-10-24 18:58:05 -0700 | [diff] [blame] | 7 | #define EX_ST(x,y) \ |
David S. Miller | ae2c6ca | 2012-09-26 21:11:01 -0700 | [diff] [blame] | 8 | 98: x; \ |
| 9 | .section __ex_table,"a";\ |
| 10 | .align 4; \ |
David S. Miller | 95707704 | 2016-10-24 18:58:05 -0700 | [diff] [blame] | 11 | .word 98b, y; \ |
David S. Miller | ae2c6ca | 2012-09-26 21:11:01 -0700 | [diff] [blame] | 12 | .text; \ |
| 13 | .align 4; |
| 14 | |
David S. Miller | 95707704 | 2016-10-24 18:58:05 -0700 | [diff] [blame] | 15 | #define EX_ST_FP(x,y) \ |
Rob Gardner | a7c5724 | 2015-12-22 23:24:49 -0700 | [diff] [blame] | 16 | 98: x; \ |
| 17 | .section __ex_table,"a";\ |
| 18 | .align 4; \ |
David S. Miller | 95707704 | 2016-10-24 18:58:05 -0700 | [diff] [blame] | 19 | .word 98b, y##_fp; \ |
Rob Gardner | a7c5724 | 2015-12-22 23:24:49 -0700 | [diff] [blame] | 20 | .text; \ |
| 21 | .align 4; |
| 22 | |
David S. Miller | ae2c6ca | 2012-09-26 21:11:01 -0700 | [diff] [blame] | 23 | #ifndef ASI_AIUS |
| 24 | #define ASI_AIUS 0x11 |
| 25 | #endif |
| 26 | |
| 27 | #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS |
| 28 | #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 |
| 29 | #endif |
| 30 | |
| 31 | #define FUNC_NAME NG4copy_to_user |
| 32 | #define STORE(type,src,addr) type##a src, [addr] %asi |
| 33 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
| 34 | #define EX_RETVAL(x) 0 |
| 35 | |
| 36 | #ifdef __KERNEL__ |
| 37 | /* Writing to %asi is _expensive_ so we hardcode it. |
| 38 | * Reading %asi to check for KERNEL_DS is comparatively |
| 39 | * cheap. |
| 40 | */ |
| 41 | #define PREAMBLE \ |
| 42 | rd %asi, %g1; \ |
| 43 | cmp %g1, ASI_AIUS; \ |
Al Viro | 31af2f3 | 2017-03-21 17:04:45 -0400 | [diff] [blame] | 44 | bne,pn %icc, raw_copy_in_user; \ |
David S. Miller | ae2c6ca | 2012-09-26 21:11:01 -0700 | [diff] [blame] | 45 | nop |
| 46 | #endif |
| 47 | |
| 48 | #include "NG4memcpy.S" |