1 /* $NetBSD: rbus_machdep.c,v 1.7 2017/08/15 09:25:00 maxv Exp $ */
2
3 /*
4 * Copyright (c) 1999
5 * HAYAKAWA Koichi. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: rbus_machdep.c,v 1.7 2017/08/15 09:25:00 maxv Exp $");
30
31 #include "opt_pcifixup.h"
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/extent.h>
36
37 #include <sys/sysctl.h>
38
39 #include <sys/bus.h>
40 #include <dev/cardbus/rbus.h>
41
42 #include <sys/device.h>
43 #include <dev/isa/isareg.h>
44 #include <dev/isa/isavar.h>
45
46 #include <dev/pci/pcivar.h>
47 #if defined(PCI_ADDR_FIXUP)
48 #include <arch/x86/pci/pci_addr_fixup.h>
49 #endif
50
51 #ifndef RBUS_IO_BASE
52 #define RBUS_IO_BASE 0x4000
53 #endif
54 #ifndef RBUS_IO_SIZE
55 #define RBUS_IO_SIZE 0x2000
56 #endif
57
58 #ifndef RBUS_MIN_START
59 #define RBUS_MIN_START 0x0000000080000000 /* 2GB */
60 #endif
61 bus_addr_t rbus_min_start = RBUS_MIN_START;
62
63 /*
64 * rbus_tag_t rbus_fakeparent_mem(struct pci_attach_args *pa)
65 *
66 * This function makes an rbus tag for memory space. This rbus tag
67 * shares the all memory region of ex_iomem.
68 */
69 rbus_tag_t
rbus_pccbb_parent_mem(struct pci_attach_args * pa)70 rbus_pccbb_parent_mem(struct pci_attach_args *pa)
71 {
72 bus_addr_t start;
73 bus_size_t size;
74 extern struct extent *iomem_ex;
75 struct extent *ex = iomem_ex;
76
77 #if defined(PCI_ADDR_FIXUP)
78 if (pciaddr.extent_mem != NULL)
79 ex = pciaddr.extent_mem;
80 #endif
81
82 start = ex->ex_start;
83
84 /*
85 * XXX: unfortunately, iomem_ex cannot be used for the dynamic
86 * bus_space allocation. There are some hidden memory (or
87 * some obstacles which are not recognised by the kernel) in
88 * the region governed by iomem_ex. So I decide to use only
89 * very high address region.
90 *
91 * If pcibios_addr_fixup() succeeded, the PCI device is using an area
92 * which is not recognised by the kernel as already reserved.
93 */
94
95 if (start < rbus_min_start)
96 start = rbus_min_start;
97
98 size = ex->ex_end - start;
99
100 return rbus_new_root_share(pa->pa_memt, ex, start, size, 0);
101 }
102
103
104 /*
105 * rbus_tag_t rbus_pccbb_parent_io(struct pci_attach_args *pa)
106 */
107 rbus_tag_t
rbus_pccbb_parent_io(struct pci_attach_args * pa)108 rbus_pccbb_parent_io(struct pci_attach_args *pa)
109 {
110 bus_addr_t start;
111 bus_size_t size;
112 rbus_tag_t ret;
113 extern struct extent *ioport_ex;
114 struct extent *ex = ioport_ex;
115
116 #if defined(PCI_ADDR_FIXUP)
117 if (pciaddr.extent_port != NULL)
118 ex = pciaddr.extent_port;
119 #endif
120
121 start = RBUS_IO_BASE;
122 size = RBUS_IO_SIZE;
123
124 ret = rbus_new_root_share(pa->pa_iot, ex, start, size, 0);
125 if (ret == NULL)
126 panic("failed to alloc I/O space");
127
128 return ret;
129 }
130