xref: /freebsd/sys/riscv/riscv/bus_space_asm.S (revision 685dc743dc3b5645e34836464128e1c0558b404b)
1/*-
2 * Copyright (c) 2016-2020 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#include <machine/asm.h>
36ENTRY(generic_bs_r_1)
37	add	a3, a1, a2
38	lbu	a0, 0(a3)
39	ret
40END(generic_bs_r_1)
41
42ENTRY(generic_bs_r_2)
43	add	a3, a1, a2
44	lhu	a0, 0(a3)
45	ret
46END(generic_bs_r_2)
47
48ENTRY(generic_bs_r_4)
49	add	a3, a1, a2
50	lw	a0, 0(a3)
51	ret
52END(generic_bs_r_4)
53
54ENTRY(generic_bs_r_8)
55	add	a3, a1, a2
56	ld	a0, 0(a3)
57	ret
58END(generic_bs_r_8)
59
60ENTRY(generic_bs_w_1)
61	add	a4, a1, a2
62	sb	a3, 0(a4)
63	ret
64END(generic_bs_w_1)
65
66ENTRY(generic_bs_w_2)
67	add	a4, a1, a2
68	sh	a3, 0(a4)
69	ret
70END(generic_bs_w_2)
71
72ENTRY(generic_bs_w_4)
73	add	a4, a1, a2
74	sw	a3, 0(a4)
75	ret
76END(generic_bs_w_4)
77
78ENTRY(generic_bs_w_8)
79	add	a4, a1, a2
80	sd	a3, 0(a4)
81	ret
82END(generic_bs_w_8)
83