xref: /freebsd/sys/riscv/include/asm.h (revision eb69d1f144a6fcc765d1b9d44a5ae8082353e70b)
1 /*-
2  * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
3  * All rights reserved.
4  *
5  * Portions of this software were developed by SRI International and the
6  * University of Cambridge Computer Laboratory under DARPA/AFRL contract
7  * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
8  *
9  * Portions of this software were developed by the University of Cambridge
10  * Computer Laboratory as part of the CTSRD Project, with support from the
11  * UK Higher Education Innovation Fund (HEIF).
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  *    notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions and the following disclaimer in the
20  *    documentation and/or other materials provided with the distribution.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  * $FreeBSD$
35  */
36 
37 #ifndef _MACHINE_ASM_H_
38 #define	_MACHINE_ASM_H_
39 
40 #undef __FBSDID
41 #if !defined(lint) && !defined(STRIP_FBSDID)
42 #define	__FBSDID(s)	.ident s
43 #else
44 #define	__FBSDID(s)	/* nothing */
45 #endif /* not lint and not STRIP_FBSDID */
46 
47 #define	_C_LABEL(x)	x
48 
49 #define	ENTRY(sym)						\
50 	.text; .globl sym; .type sym,@function; .align 4; sym:
51 #define	END(sym) .size sym, . - sym
52 
53 #define	EENTRY(sym)						\
54 	.globl	sym; sym:
55 #define	EEND(sym)
56 
57 #define	WEAK_REFERENCE(sym, alias)				\
58 	.weak alias;						\
59 	.set alias,sym
60 
61 #define	SET_FAULT_HANDLER(handler, tmp)					\
62 	ld	tmp, PC_CURTHREAD(gp);					\
63 	ld	tmp, TD_PCB(tmp);		/* Load the pcb */	\
64 	sd	handler, PCB_ONFAULT(tmp)	/* Set the handler */
65 
66 #endif /* _MACHINE_ASM_H_ */
67