The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/pci/ofw_pci.c

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    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: releng/6.0/sys/sparc64/pci/ofw_pci.c 139825 2005-01-07 02:29:27Z imp $
   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 
   47 static u_int8_t pci_bus_cnt;
   48 static phandle_t *pci_bus_map;
   49 static int pci_bus_map_sz;
   50 
   51 #define PCI_BUS_MAP_INC 10
   52 
   53 u_int8_t
   54 ofw_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 }

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