ofw_isa.c revision 139825 
1220297Sadrian/*-
2220297Sadrian * Copyright (c) 1999, 2000 Matthew R. Green
3220297Sadrian * Copyright (c) 2001, 2003 Thomas Moestl <tmm@FreeBSD.org>
4220297Sadrian * All rights reserved.
5220297Sadrian *
6220297Sadrian * Redistribution and use in source and binary forms, with or without
7220297Sadrian * modification, are permitted provided that the following conditions
8220297Sadrian * are met:
9220297Sadrian * 1. Redistributions of source code must retain the above copyright
10220297Sadrian *    notice, this list of conditions and the following disclaimer.
11220297Sadrian * 2. Redistributions in binary form must reproduce the above copyright
12292703Sadrian *    notice, this list of conditions and the following disclaimer in the
13292703Sadrian *    documentation and/or other materials provided with the distribution.
14292703Sadrian * 3. The name of the author may not be used to endorse or promote products
15292703Sadrian *    derived from this software without specific prior written permission.
16292703Sadrian *
17220297Sadrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18220297Sadrian * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19241942Simp * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	from: NetBSD: ebus.c,v 1.26 2001/09/10 16:27:53 eeh Exp
30 *
31 * $FreeBSD: head/sys/sparc64/isa/ofw_isa.c 139825 2005-01-07 02:29:27Z imp $
32 */
33
34/*
35 * Helper functions which can be used in both ISA and EBus code.
36 */
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/bus.h>
41
42#include <dev/ofw/openfirm.h>
43
44#include <machine/bus.h>
45#include <machine/resource.h>
46#include <machine/ofw_bus.h>
47
48#include <sparc64/pci/ofw_pci.h>
49#include <sparc64/isa/ofw_isa.h>
50
51#include "pcib_if.h"
52
53int
54ofw_isa_range_restype(struct isa_ranges *range)
55{
56	int ps = ISA_RANGE_PS(range);
57
58	switch (ps) {
59	case PCI_CS_IO:
60		return (SYS_RES_IOPORT);
61	case PCI_CS_MEM32:
62		return (SYS_RES_MEMORY);
63	default:
64		panic("ofw_isa_range_restype: illegal space %x", ps);
65	}
66
67}
68
69/* XXX: this only supports PCI as parent bus right now. */
70int
71ofw_isa_range_map(struct isa_ranges *range, int nrange, u_long *start,
72    u_long *end, int *which)
73{
74	struct isa_ranges *r;
75	u_int64_t offs, cstart, cend;
76	int i;
77
78	for (i = 0; i < nrange; i++) {
79		r = &range[i];
80		cstart = ISA_RANGE_CHILD(r);
81		cend = cstart + r->size;
82		if (*start < cstart || *start > cend)
83			continue;
84		if (*end < cstart || *end > cend) {
85			panic("ofw_isa_map_iorange: iorange crosses pci "
86			    "ranges (%#lx not in %#lx - %#lx)", *end, cstart,
87			    cend);
88		}
89		offs = ISA_RANGE_PHYS(r);
90		*start = *start + offs - cstart;
91		*end  = *end + offs - cstart;
92		if (which != NULL)
93			*which = i;
94		return (ofw_isa_range_restype(r));
95	}
96	panic("ofw_isa_map_iorange: could not map range %#lx - %#lx",
97	    *start, *end);
98}
99
100ofw_pci_intr_t
101ofw_isa_route_intr(device_t bridge, phandle_t node, struct ofw_bus_iinfo *ii,
102    ofw_isa_intr_t intr)
103{
104	struct isa_regs reg;
105	u_int8_t maskbuf[sizeof(reg) + sizeof(intr)];
106	device_t pbridge;
107	ofw_isa_intr_t mintr;
108
109	pbridge = device_get_parent(device_get_parent(bridge));
110	/*
111	 * If we get a match from using the map, the resulting INO is
112	 * fully specified, so we may not continue to map.
113	 */
114	if (!ofw_bus_lookup_imap(node, ii, &reg, sizeof(reg),
115	    &intr, sizeof(intr), &mintr, sizeof(mintr), maskbuf)) {
116		/* Try routing at the parent bridge. */
117		mintr = PCIB_ROUTE_INTERRUPT(pbridge, bridge, intr);
118	}
119	return (mintr);
120}
121