ofw_isa.c revision 119338 
1/*
2 * Copyright (c) 1999, 2000 Matthew R. Green
3 * Copyright (c) 2001, 2003 Thomas Moestl <tmm@FreeBSD.org>
4 * 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 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * 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 119338 2003-08-23 00:11:16Z imp $
32 */
33
34/*
35 * Helper functions which can be used in both ISA and EBus code.
36 */
37
38#include "opt_ofw_pci.h"
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/bus.h>
43
44#include <dev/ofw/openfirm.h>
45#include <dev/ofw/ofw_pci.h>
46
47#include <machine/bus.h>
48#include <machine/resource.h>
49#include <machine/ofw_bus.h>
50
51#include <sparc64/pci/ofw_pci.h>
52#include <sparc64/isa/ofw_isa.h>
53
54#include "pcib_if.h"
55
56/* XXX: this only supports PCI as parent bus right now. */
57int
58ofw_isa_map_iorange(struct isa_ranges *range, int nrange, u_long *start,
59    u_long *end)
60{
61	u_int64_t offs, cstart, cend;
62	int i;
63
64	for (i = 0; i < nrange; i++) {
65		cstart = ((u_int64_t)range[i].child_hi << 32) |
66		    range[i].child_lo;
67		cend = cstart + range[i].size;
68		if (*start < cstart || *start > cend)
69			continue;
70		if (*end < cstart || *end > cend) {
71			panic("ofw_isa_map_iorange: iorange crosses pci "
72			    "ranges (%#lx not in %#lx - %#lx)", *end, cstart,
73			    cend);
74		}
75		offs = (((u_int64_t)range[i].phys_mid << 32) |
76		    range[i].phys_lo);
77		*start = *start + offs - cstart;
78		*end  = *end + offs - cstart;
79		/* Isolate address space and find the right tag */
80		switch (ISA_RANGE_PS(&range[i])) {
81		case PCI_CS_IO:
82			return (SYS_RES_IOPORT);
83		case PCI_CS_MEM32:
84			return (SYS_RES_MEMORY);
85		default:
86			panic("ofw_isa_map_iorange: illegal space %x",
87			    ISA_RANGE_PS(&range[i]));
88			break;
89		}
90	}
91	panic("ofw_isa_map_iorange: could not map range %#lx - %#lx",
92	    *start, *end);
93}
94
95#ifdef OFW_NEWPCI
96ofw_pci_intr_t
97ofw_isa_route_intr(device_t bridge, phandle_t node, struct ofw_bus_iinfo *ii,
98    ofw_isa_intr_t intr)
99{
100	struct isa_regs reg;
101	u_int8_t maskbuf[sizeof(reg) + sizeof(intr)];
102	device_t pbridge;
103	ofw_isa_intr_t mintr;
104
105	pbridge = device_get_parent(device_get_parent(bridge));
106	/*
107	 * If we get a match from using the map, the resulting INO is
108	 * fully specified, so we may not continue to map.
109	 */
110	if (!ofw_bus_lookup_imap(node, ii, &reg, sizeof(reg),
111	    &intr, sizeof(intr), &mintr, sizeof(mintr), maskbuf)) {
112		/* Try routing at the parent bridge. */
113		mintr = PCIB_ROUTE_INTERRUPT(pbridge, bridge, intr);
114	}
115	return (mintr);
116}
117#endif /* OFW_NEWPCI */
118