sys/arch/x86/include/pci_machdep.h

   1 /*      $NetBSD: pci_machdep.h,v 1.7 2008/04/16 16:06:51 cegger 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 #ifndef _X86_PCI_MACHDEP_H_
  34 #define _X86_PCI_MACHDEP_H_
  35
  36 /*
  37  * Machine-specific definitions for PCI autoconfiguration.
  38  */
  39 #define __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
  40
  41 /*
  42  * Many i386 PCI systems only work properly with I/O mapped space, in
  43  * particular, buses behind PCI-PCI bridges may not have memory
  44  * space mapped at all.  For this reason, tell drivers that have
  45  * a choice that we "prefer" I/O space.
  46  */
  47 #define PCI_PREFER_IOSPACE
  48
  49 /*
  50  * i386-specific PCI structure and type definitions.
  51  * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
  52  *
  53  * Configuration tag; created from a {bus,device,function} triplet by
  54  * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write().
  55  * We could instead always pass the {bus,device,function} triplet to
  56  * the read and write routines, but this would cause extra overhead.
  57  *
  58  * Mode 2 is historical and deprecated by the Revision 2.0 specification.
  59  */
  60 union x86_pci_tag_u {
  61         uint32_t mode1;
  62         struct {
  63                 uint16_t port;
  64                 uint8_t enable;
  65                 uint8_t forward;
  66         } mode2;
  67 };
  68
  69 extern struct x86_bus_dma_tag pci_bus_dma_tag;
  70 #ifdef _LP64
  71 extern struct x86_bus_dma_tag pci_bus_dma64_tag;
  72 #endif
  73
  74 /*
  75  * Types provided to machine-independent PCI code
  76  */
  77 typedef void *pci_chipset_tag_t;
  78 typedef union x86_pci_tag_u pcitag_t;
  79 typedef int pci_intr_handle_t;
  80
  81 /*
  82  * i386-specific PCI variables and functions.
  83  * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
  84  */
  85 extern int pci_mode;
  86 int             pci_mode_detect(void);
  87 int             pci_bus_flags(void);
  88 struct          pci_attach_args;
  89
  90 /*
  91  * Functions provided to machine-independent PCI code.
  92  */
  93 void            pci_attach_hook(struct device *, struct device *,
  94                     struct pcibus_attach_args *);
  95 int             pci_bus_maxdevs(pci_chipset_tag_t, int);
  96 pcitag_t        pci_make_tag(pci_chipset_tag_t, int, int, int);
  97 void            pci_decompose_tag(pci_chipset_tag_t, pcitag_t,
  98                     int *, int *, int *);
  99 pcireg_t        pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
 100 void            pci_conf_write(pci_chipset_tag_t, pcitag_t, int,
 101                     pcireg_t);
 102 int             pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
 103 const char      *pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t);
 104 const struct evcnt *pci_intr_evcnt(pci_chipset_tag_t, pci_intr_handle_t);
 105 void            *pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t,
 106                     int, int (*)(void *), void *);
 107 void            pci_intr_disestablish(pci_chipset_tag_t, void *);
 108
 109
 110 /*
 111  * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
 112  * BY PORTABLE CODE.
 113  */
 114
 115 /* Extract Bus Number for a host bridge or -1 if unknown. */
 116 int             pchb_get_bus_number(pci_chipset_tag_t, pcitag_t);
 117
 118 /*
 119  * Section 6.2.4, `Miscellaneous Functions' of the PCI Specification,
 120  * says that 255 means `unknown' or `no connection' to the interrupt
 121  * controller on a PC.
 122  */
 123 #define X86_PCI_INTERRUPT_LINE_NO_CONNECTION    0xff
 124
 125 void pci_device_foreach(pci_chipset_tag_t, int,
 126                         void (*)(pci_chipset_tag_t, pcitag_t, void*),
 127                         void *);
 128
 129 void pci_device_foreach_min(pci_chipset_tag_t, int, int,
 130                             void (*)(pci_chipset_tag_t, pcitag_t, void*),
 131                             void *);
 132
 133 void pci_bridge_foreach(pci_chipset_tag_t, int, int,
 134         void (*) (pci_chipset_tag_t, pcitag_t, void *), void *);
 135
 136
 137 #endif /* _X86_PCI_MACHDEP_H_ */