1/*-
 2 * Copyright (c) 2015-2018 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
35#ifndef _MACHINE_ASM_H_
36#define	_MACHINE_ASM_H_
37
38#undef __FBSDID
39#if !defined(lint) && !defined(STRIP_FBSDID)
40#define	__FBSDID(s)	.ident s
41#else
42#define	__FBSDID(s)	/* nothing */
43#endif /* not lint and not STRIP_FBSDID */
44
45#define	_C_LABEL(x)	x
46
47#define	ENTRY(sym)						\
48	.text; .globl sym; .type sym,@function; .align 4; sym: .cfi_startproc;
49#define	END(sym) .cfi_endproc; .size sym, . - sym
50
51#define	EENTRY(sym)						\
52	.globl	sym; sym:
53#define	EEND(sym)
54
55#define	WEAK_REFERENCE(sym, alias)				\
56	.weak alias;						\
57	.set alias,sym
58
59#define	SET_FAULT_HANDLER(handler, tmp)					\
60	ld	tmp, PC_CURTHREAD(tp);					\
61	ld	tmp, TD_PCB(tmp);		/* Load the pcb */	\
62	sd	handler, PCB_ONFAULT(tmp)	/* Set the handler */
63
64#define	ENTER_USER_ACCESS(tmp)						\
65	li	tmp, SSTATUS_SUM;					\
66	csrs	sstatus, tmp
67
68#define	EXIT_USER_ACCESS(tmp)						\
69	li	tmp, SSTATUS_SUM;					\
70	csrc	sstatus, tmp
71
72#endif /* _MACHINE_ASM_H_ */