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| /*
| * M7copy_to_user.S: SPARC M7 optimized copy to userspace.
| *
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
| */
|
|
| #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_INIT_QUAD_LDD_AIUS
| #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
| #endif
|
| #define FUNC_NAME M7copy_to_user
| #define STORE(type,src,addr) type##a src, [addr] %asi
| #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS
| #define STORE_MRU_ASI ASI_ST_BLKINIT_MRU_S
| #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 "M7memcpy.S"
|
|
