ofw_pci.c revision 129051 
1/*
2 * Copyright (c) 1999, 2000 Matthew R. Green
3 * Copyright (c) 2001 - 2003 by 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: psycho.c,v 1.35 2001/09/10 16:17:06 eeh Exp
30 *
31 * $FreeBSD: head/sys/sparc64/pci/ofw_pci.c 129051 2004-05-08 13:53:47Z marius $
32 */
33
34#include "opt_ofw_pci.h"
35
36#include <sys/param.h>
37#include <sys/kernel.h>
38#include <sys/systm.h>
39#include <sys/bus.h>
40
41#include <dev/ofw/openfirm.h>
42
43#include <machine/bus.h>
44
45#include <sparc64/pci/ofw_pci.h>
46
47static u_int8_t pci_bus_cnt;
48static phandle_t *pci_bus_map;
49static int pci_bus_map_sz;
50
51#define	PCI_BUS_MAP_INC	10
52
53u_int8_t
54ofw_pci_alloc_busno(phandle_t node)
55{
56	phandle_t *om;
57	int osz;
58	u_int8_t n;
59
60	n = pci_bus_cnt++;
61	/* Establish a mapping between bus numbers and device nodes. */
62	if (n >= pci_bus_map_sz) {
63		osz = pci_bus_map_sz;
64		om = pci_bus_map;
65		pci_bus_map_sz = n + PCI_BUS_MAP_INC;
66		pci_bus_map = malloc(sizeof(*pci_bus_map) * pci_bus_map_sz,
67		    M_DEVBUF, M_WAITOK | M_ZERO);
68		if (om != NULL) {
69			bcopy(om, pci_bus_map, sizeof(*om) * osz);
70			free(om, M_DEVBUF);
71		}
72	}
73	pci_bus_map[n] = node;
74	return (n);
75}
76