rumpdev_bus_space.c revision 1.1 
1/*	$NetBSD: rumpdev_bus_space.c,v 1.1 2014/04/04 12:53:59 pooka Exp $	*/
2
3/*-
4 * Copyright (c) 2013 Antti Kantee.  All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29
30#include <sys/param.h>
31
32#include <dev/pci/pcivar.h>
33
34#include "pci_user.h"
35
36int
37bus_space_map(bus_space_tag_t bst, bus_addr_t address, bus_size_t size,
38	int flags, bus_space_handle_t *handlep)
39{
40	int rv;
41
42	/*
43	 * I/O space we just "let it bli" in case someone wants to
44	 * map it (e.g. on Xen)
45 	 *
46	 * Memory space needs to be mapped into our guest, so we
47	 * make a hypercall to request it.
48	 */
49	if (bst == 0) {
50		*handlep = address;
51		rv = 0;
52	} else {
53		*handlep = (bus_space_handle_t)rumpcomp_pci_map(address, size);
54		rv = *handlep ? 0 : EINVAL;
55	}
56
57	return rv;
58}
59
60uint8_t
61bus_space_read_1(bus_space_tag_t bst, bus_space_handle_t bsh,
62	bus_size_t offset)
63{
64	uint8_t rv;
65
66	if (bst == 0) {
67		panic("8bit IO space not supported");
68	} else {
69		rv = *(volatile uint8_t *)(bsh + offset);
70	}
71
72	return rv;
73}
74
75uint16_t
76bus_space_read_2(bus_space_tag_t bst, bus_space_handle_t bsh,
77	bus_size_t offset)
78{
79	uint16_t rv;
80
81	if (bst == 0) {
82		panic("16bit IO space not supported");
83	} else {
84		rv = *(volatile uint16_t *)(bsh + offset);
85	}
86
87	return rv;
88}
89
90uint32_t
91bus_space_read_4(bus_space_tag_t bst, bus_space_handle_t bsh,
92	bus_size_t offset)
93{
94	uint32_t rv;
95
96	if (bst == 0) {
97#if 1
98		panic("IO space not supported in this build");
99#else
100		unsigned short addr = bsh + offset;
101		__asm__ __volatile__("inl %1, %0" : "=a"(rv) : "d"(addr));
102#endif
103	} else {
104		rv = *(volatile uint32_t *)(bsh + offset);
105	}
106
107	return rv;
108}
109
110void
111bus_space_write_1(bus_space_tag_t bst, bus_space_handle_t bsh,
112	bus_size_t offset, uint8_t v)
113{
114
115	if (bst == 0) {
116#if 1
117		panic("IO space not supported in this build");
118#endif
119	} else {
120		*(volatile uint8_t *)(bsh + offset) = v;
121	}
122}
123
124void
125bus_space_write_2(bus_space_tag_t bst, bus_space_handle_t bsh,
126	bus_size_t offset, uint16_t v)
127{
128
129	if (bst == 0) {
130#if 1
131		panic("IO space not supported in this build");
132#endif
133	} else {
134		*(volatile uint16_t *)(bsh + offset) = v;
135	}
136}
137
138void
139bus_space_write_4(bus_space_tag_t bst, bus_space_handle_t bsh,
140	bus_size_t offset, uint32_t v)
141{
142
143	if (bst == 0) {
144#if 1
145		panic("IO space not supported in this build");
146#else
147		unsigned short addr = bsh + offset;
148		__asm__ __volatile__("outl %0, %1" :: "a"(v), "d"(addr));
149#endif
150	} else {
151		*(volatile uint32_t *)(bsh + offset) = v;
152	}
153}
154
155paddr_t
156bus_space_mmap(bus_space_tag_t bst, bus_addr_t addr, off_t off,
157	int prot, int flags)
158{
159
160	panic("%s: unimplemented", __func__);
161}
162
163int
164bus_space_subregion(bus_space_tag_t bst, bus_space_handle_t bsh,
165	bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep)
166{
167
168	panic("%s: unimplemented", __func__);
169}
170
171void
172bus_space_unmap(bus_space_tag_t bst, bus_space_handle_t bsh,
173	bus_size_t size)
174{
175
176	panic("%s: unimplemented", __func__);
177}
178