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pci_machdep.h revision 1.6 
      1 /*	$NetBSD: pci_machdep.h,v 1.6 2005/06/20 11:04:15 sekiya 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 	u_int32_t mode1;
     62 	struct {
     63 		u_int16_t port;
     64 		u_int8_t enable;
     65 		u_int8_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 /*
    116  * Section 6.2.4, `Miscellaneous Functions' of the PCI Specification,
    117  * says that 255 means `unknown' or `no connection' to the interrupt
    118  * controller on a PC.
    119  */
    120 #define	X86_PCI_INTERRUPT_LINE_NO_CONNECTION	0xff
    121 
    122 void pci_device_foreach(pci_chipset_tag_t, int,
    123 			void (*)(pci_chipset_tag_t, pcitag_t, void*),
    124 			void *);
    125 
    126 void pci_device_foreach_min(pci_chipset_tag_t, int, int,
    127 			    void (*)(pci_chipset_tag_t, pcitag_t, void*),
    128 			    void *);
    129 
    130 void pci_bridge_foreach(pci_chipset_tag_t, int, int,
    131 	void (*) (pci_chipset_tag_t, pcitag_t, void *), void *);
    132 
    133 
    134 #endif /* _X86_PCI_MACHDEP_H_ */
    135