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pci_machdep.c revision 1.2.44.1 
      1 /*	NetBSD: pci_machdep.c,v 1.12 2001/06/19 11:56:27 nonaka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
      5  * Copyright (c) 1994 Charles M. Hannum.  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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Charles M. Hannum.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * Machine-specific functions for PCI autoconfiguration.
     35  *
     36  * On PCs, there are two methods of generating PCI configuration cycles.
     37  * We try to detect the appropriate mechanism for this machine and set
     38  * up a few function pointers to access the correct method directly.
     39  */
     40 
     41 #include <sys/types.h>
     42 #include <sys/param.h>
     43 #include <sys/time.h>
     44 #include <sys/systm.h>
     45 #include <sys/errno.h>
     46 #include <sys/extent.h>
     47 #include <sys/device.h>
     48 
     49 #include <uvm/uvm_extern.h>
     50 
     51 #define _POWERPC_BUS_DMA_PRIVATE
     52 #include <machine/bus.h>
     53 #include <machine/intr.h>
     54 
     55 #include <dev/isa/isavar.h>
     56 
     57 #include <dev/pci/pcivar.h>
     58 #include <dev/pci/pcireg.h>
     59 #include <dev/pci/pcidevs.h>
     60 #include <dev/pci/pciconf.h>
     61 
     62 #define	PCI_MODE1_ENABLE	0x80000000UL
     63 #define	PCI_MODE1_ADDRESS_REG	(PREP_BUS_SPACE_IO + 0xcf8)
     64 #define	PCI_MODE1_DATA_REG	(PREP_BUS_SPACE_IO + 0xcfc)
     65 
     66 #define	PCI_CBIO		0x10
     67 
     68 void
     69 ibmnws_pci_get_chipset_tag_indirect(pci_chipset_tag_t pc)
     70 {
     71 
     72 	pc->pc_conf_v = (void *)pc;
     73 
     74 	pc->pc_attach_hook = genppc_pci_indirect_attach_hook;
     75 	pc->pc_bus_maxdevs = ibmnws_pci_bus_maxdevs;
     76 	pc->pc_make_tag = genppc_pci_indirect_make_tag;
     77 	pc->pc_conf_read = genppc_pci_indirect_conf_read;
     78 	pc->pc_conf_write = genppc_pci_indirect_conf_write;
     79 
     80 	pc->pc_intr_v = (void *)pc;
     81 
     82 	pc->pc_intr_map = genppc_pci_intr_map;
     83 	pc->pc_intr_string = genppc_pci_intr_string;
     84 	pc->pc_intr_evcnt = genppc_pci_intr_evcnt;
     85 	pc->pc_intr_establish = genppc_pci_intr_establish;
     86 	pc->pc_intr_disestablish = genppc_pci_intr_disestablish;
     87 
     88 	pc->pc_conf_interrupt = genppc_pci_conf_interrupt;
     89 	pc->pc_decompose_tag = genppc_pci_indirect_decompose_tag;
     90 	pc->pc_conf_hook = ibmnws_pci_conf_hook;
     91 
     92 	pc->pc_addr = mapiodev(PCI_MODE1_ADDRESS_REG, 4);
     93 	pc->pc_data = mapiodev(PCI_MODE1_DATA_REG, 4);
     94 	pc->pc_bus = 0;
     95 	pc->pc_node = 0;
     96 	pc->pc_memt = 0;
     97 	pc->pc_iot = 0;
     98 }
     99 
    100 int
    101 ibmnws_pci_bus_maxdevs(pci_chipset_tag_t pct, int busno)
    102 {
    103 
    104 	/*
    105 	 * Bus number is irrelevant.  Configuration Mechanism 1 is in
    106 	 * use, can have devices 0-32 (i.e. the `normal' range).
    107 	 */
    108 	return (32);
    109 }
    110 
    111 int
    112 ibmnws_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, pcireg_t id)
    113 {
    114 
    115 	/*
    116 	 * The P9100 board found in some IBM machines cannot be
    117 	 * over-configured.
    118 	 */
    119 	if (PCI_VENDOR(id) == PCI_VENDOR_WEITEK &&
    120 	    PCI_PRODUCT(id) == PCI_PRODUCT_WEITEK_P9100)
    121 		return 0;
    122 
    123 	return (PCI_CONF_DEFAULT);
    124 }
    125