| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| David S. Miller | 6c70b6f | 2007-08-08 17:11:39 -0700 | [diff] [blame] | 2 | /* GENcopy_to_user.S: Generic sparc64 copy to userspace. |
| 3 | * |
| 4 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) |
| 5 | */ |
| 6 | |
| David S. Miller | d0796b5 | 2016-08-15 15:26:38 -0700 | [diff] [blame] | 7 | #define EX_ST(x,y) \ |
| David S. Miller | 6c70b6f | 2007-08-08 17:11:39 -0700 | [diff] [blame] | 8 | 98: x; \ |
| David S. Miller | 6c70b6f | 2007-08-08 17:11:39 -0700 | [diff] [blame] | 9 | .section __ex_table,"a";\ |
| 10 | .align 4; \ |
| David S. Miller | d0796b5 | 2016-08-15 15:26:38 -0700 | [diff] [blame] | 11 | .word 98b, y; \ |
| David S. Miller | 6c70b6f | 2007-08-08 17:11:39 -0700 | [diff] [blame] | 12 | .text; \ |
| 13 | .align 4; |
| 14 | |
| 15 | #ifndef ASI_AIUS |
| 16 | #define ASI_AIUS 0x11 |
| 17 | #endif |
| 18 | |
| 19 | #define FUNC_NAME GENcopy_to_user |
| 20 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS |
| 21 | #define EX_RETVAL(x) 0 |
| 22 | |
| 23 | #ifdef __KERNEL__ |
| 24 | /* Writing to %asi is _expensive_ so we hardcode it. |
| 25 | * Reading %asi to check for KERNEL_DS is comparatively |
| 26 | * cheap. |
| 27 | */ |
| 28 | #define PREAMBLE \ |
| 29 | rd %asi, %g1; \ |
| 30 | cmp %g1, ASI_AIUS; \ |
| Al Viro | 31af2f3 | 2017-03-21 17:04:45 -0400 | [diff] [blame] | 31 | bne,pn %icc, raw_copy_in_user; \ |
| David S. Miller | 6c70b6f | 2007-08-08 17:11:39 -0700 | [diff] [blame] | 32 | nop |
| 33 | #endif |
| 34 | |
| 35 | #include "GENmemcpy.S" |