projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ae2c6ca6 DM |
1 | /* NG4copy_to_user.S: Niagara-4 optimized copy to userspace. |
| 2 | * | |
| 3 | * Copyright (C) 2012 David S. Miller (davem@davemloft.net) | |
| 4 | */ | |
| 5 | ||
| 6 | #define EX_ST(x) \ | |
| 7 | 98: x; \ | |
| 8 | .section __ex_table,"a";\ | |
| 9 | .align 4; \ | |
| 10 | .word 98b, __retl_one_asi;\ | |
| 11 | .text; \ | |
| 12 | .align 4; | |
| 13 | ||
| a7c5724b RG |
14 | #define EX_ST_FP(x) \ |
| 15 | 98: x; \ | |
| 16 | .section __ex_table,"a";\ | |
| 17 | .align 4; \ | |
| 18 | .word 98b, __retl_one_asi_fp;\ | |
| 19 | .text; \ | |
| 20 | .align 4; | |
| 21 | ||
| ae2c6ca6 DM |
22 | #ifndef ASI_AIUS |
| 23 | #define ASI_AIUS 0x11 | |
| 24 | #endif | |
| 25 | ||
| 26 | #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 27 | #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 | |
| 28 | #endif | |
| 29 | ||
| 30 | #define FUNC_NAME NG4copy_to_user | |
| 31 | #define STORE(type,src,addr) type##a src, [addr] %asi | |
| 32 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 33 | #define EX_RETVAL(x) 0 | |
| 34 | ||
| 35 | #ifdef __KERNEL__ | |
| 36 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 37 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 38 | * cheap. | |
| 39 | */ | |
| 40 | #define PREAMBLE \ | |
| 41 | rd %asi, %g1; \ | |
| 42 | cmp %g1, ASI_AIUS; \ | |
| 43 | bne,pn %icc, ___copy_in_user; \ | |
| 44 | nop | |
| 45 | #endif | |
| 46 | ||
| 47 | #include "NG4memcpy.S" |