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pci_machdep.h revision 1.2 
      1 /*	$NetBSD: pci_machdep.h,v 1.2 2003/06/15 23:09:08 fvdl 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 definitions for PCI autoconfiguration.
     35  */
     36 #define	__HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
     37 
     38 /*
     39  * Many i386 PCI systems only work properly with I/O mapped space, in
     40  * particular, buses behind PCI-PCI bridges may not have memory
     41  * space mapped at all.  For this reason, tell drivers that have
     42  * a choice that we "prefer" I/O space.
     43  */
     44 #define	PCI_PREFER_IOSPACE
     45 
     46 /*
     47  * i386-specific PCI structure and type definitions.
     48  * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
     49  *
     50  * Configuration tag; created from a {bus,device,function} triplet by
     51  * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write().
     52  * We could instead always pass the {bus,device,function} triplet to
     53  * the read and write routines, but this would cause extra overhead.
     54  *
     55  * Mode 2 is historical and deprecated by the Revision 2.0 specification.
     56  */
     57 union x86_pci_tag_u {
     58 	u_int32_t mode1;
     59 	struct {
     60 		u_int16_t port;
     61 		u_int8_t enable;
     62 		u_int8_t forward;
     63 	} mode2;
     64 };
     65 
     66 extern struct x86_bus_dma_tag pci_bus_dma_tag;
     67 #ifdef _LP64
     68 extern struct x86_bus_dma_tag pci_bus_dma64_tag;
     69 #endif
     70 
     71 /*
     72  * Types provided to machine-independent PCI code
     73  */
     74 typedef void *pci_chipset_tag_t;
     75 typedef union x86_pci_tag_u pcitag_t;
     76 typedef int pci_intr_handle_t;
     77 
     78 /*
     79  * i386-specific PCI variables and functions.
     80  * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
     81  */
     82 extern int pci_mode;
     83 int		pci_mode_detect(void);
     84 int		pci_bus_flags(void);
     85 struct		pci_attach_args;
     86 
     87 /*
     88  * Functions provided to machine-independent PCI code.
     89  */
     90 void		pci_attach_hook(struct device *, struct device *,
     91 		    struct pcibus_attach_args *);
     92 int		pci_bus_maxdevs(pci_chipset_tag_t, int);
     93 pcitag_t	pci_make_tag(pci_chipset_tag_t, int, int, int);
     94 void		pci_decompose_tag(pci_chipset_tag_t, pcitag_t,
     95 		    int *, int *, int *);
     96 pcireg_t	pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
     97 void		pci_conf_write(pci_chipset_tag_t, pcitag_t, int,
     98 		    pcireg_t);
     99 int		pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
    100 const char	*pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t);
    101 const struct evcnt *pci_intr_evcnt(pci_chipset_tag_t, pci_intr_handle_t);
    102 void		*pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t,
    103 		    int, int (*)(void *), void *);
    104 void		pci_intr_disestablish(pci_chipset_tag_t, void *);
    105 
    106 #define	pci_enumerate_bus(sc, m, p)					\
    107 	pci_enumerate_bus_generic((sc), (m), (p))
    108 
    109 /*
    110  * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
    111  * BY PORTABLE CODE.
    112  */
    113 
    114 /*
    115  * Section 6.2.4, `Miscellaneous Functions' of the PCI Specification,
    116  * says that 255 means `unknown' or `no connection' to the interrupt
    117  * controller on a PC.
    118  */
    119 #define	X86_PCI_INTERRUPT_LINE_NO_CONNECTION	0xff
    120