| David S. Miller | cf5adce | 2007-08-16 01:47:25 -0700 | [diff] [blame] | 1 | /* NG2copy_to_user.S: Niagara-2 optimized copy to userspace. |
| 2 | * |
| 3 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) |
| 4 | */ |
| 5 | |
| 6 | #define EX_ST(x) \ |
| 7 | 98: x; \ |
| 8 | .section .fixup; \ |
| 9 | .align 4; \ |
| 10 | 99: wr %g0, ASI_AIUS, %asi;\ |
| 11 | retl; \ |
| 12 | mov 1, %o0; \ |
| 13 | .section __ex_table,"a";\ |
| 14 | .align 4; \ |
| 15 | .word 98b, 99b; \ |
| 16 | .text; \ |
| 17 | .align 4; |
| 18 | |
| 19 | #ifndef ASI_AIUS |
| 20 | #define ASI_AIUS 0x11 |
| 21 | #endif |
| 22 | |
| 23 | #ifndef ASI_BLK_AIUS_4V |
| 24 | #define ASI_BLK_AIUS_4V 0x17 |
| 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 NG2copy_to_user |
| 32 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS |
| 33 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
| 34 | #define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS_4V |
| 35 | #define EX_RETVAL(x) 0 |
| 36 | |
| 37 | #ifdef __KERNEL__ |
| 38 | /* Writing to %asi is _expensive_ so we hardcode it. |
| 39 | * Reading %asi to check for KERNEL_DS is comparatively |
| 40 | * cheap. |
| 41 | */ |
| 42 | #define PREAMBLE \ |
| 43 | rd %asi, %g1; \ |
| 44 | cmp %g1, ASI_AIUS; \ |
| 45 | bne,pn %icc, memcpy_user_stub; \ |
| 46 | nop |
| 47 | #endif |
| 48 | |
| 49 | #include "NG2memcpy.S" |