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pci_machdep_common.h revision 1.5 
      1 /*	$NetBSD: pci_machdep_common.h,v 1.5 2010/11/06 04:14:30 jakllsch 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_COMMON_H_
     34 #define _X86_PCI_MACHDEP_COMMON_H_
     35 
     36 /*
     37  * Machine-specific definitions for PCI autoconfiguration.
     38  */
     39 #define	__HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
     40 #ifndef XEN
     41 #define	__HAVE_PCIIDE_MACHDEP_COMPAT_INTR_DISESTABLISH
     42 #endif
     43 
     44 /*
     45  * i386-specific PCI structure and type definitions.
     46  * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
     47  *
     48  * Configuration tag; created from a {bus,device,function} triplet by
     49  * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write().
     50  * We could instead always pass the {bus,device,function} triplet to
     51  * the read and write routines, but this would cause extra overhead.
     52  *
     53  * Mode 2 is historical and deprecated by the Revision 2.0 specification.
     54  */
     55 union x86_pci_tag_u {
     56 	uint32_t mode1;
     57 	struct {
     58 		uint16_t port;
     59 		uint8_t enable;
     60 		uint8_t forward;
     61 	} mode2;
     62 };
     63 
     64 extern struct x86_bus_dma_tag pci_bus_dma_tag;
     65 #ifdef _LP64
     66 extern struct x86_bus_dma_tag pci_bus_dma64_tag;
     67 #endif
     68 
     69 struct pci_attach_args;
     70 struct pci_chipset_tag;
     71 
     72 /*
     73  * Types provided to machine-independent PCI code
     74  */
     75 typedef struct pci_chipset_tag *pci_chipset_tag_t;
     76 typedef union x86_pci_tag_u pcitag_t;
     77 
     78 struct pci_chipset_tag {
     79 	pci_chipset_tag_t pc_super;
     80 	uint64_t pc_present;
     81 	const struct pci_overrides *pc_ov;
     82 	void *pc_ctx;
     83 };
     84 
     85 /*
     86  * i386-specific PCI variables and functions.
     87  * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
     88  */
     89 int		pci_bus_flags(void);
     90 int		pci_mode_detect(void);
     91 void		pci_mode_set(int);
     92 
     93 /*
     94  * Functions provided to machine-independent PCI code.
     95  */
     96 void		pci_attach_hook(device_t, device_t,
     97 		    struct pcibus_attach_args *);
     98 int		pci_bus_maxdevs(pci_chipset_tag_t, int);
     99 pcitag_t	pci_make_tag(pci_chipset_tag_t, int, int, int);
    100 void		pci_decompose_tag(pci_chipset_tag_t, pcitag_t,
    101 		    int *, int *, int *);
    102 pcireg_t	pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
    103 void		pci_conf_write(pci_chipset_tag_t, pcitag_t, int,
    104 		    pcireg_t);
    105 int		pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
    106 const char	*pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t);
    107 const struct evcnt *pci_intr_evcnt(pci_chipset_tag_t, pci_intr_handle_t);
    108 void		*pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t,
    109 		    int, int (*)(void *), void *);
    110 void		pci_intr_disestablish(pci_chipset_tag_t, void *);
    111 
    112 /*
    113  * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
    114  * BY PORTABLE CODE.
    115  */
    116 
    117 /* Extract Bus Number for a host bridge or -1 if unknown. */
    118 int		pchb_get_bus_number(pci_chipset_tag_t, pcitag_t);
    119 
    120 /*
    121  * Section 6.2.4, `Miscellaneous Functions' of the PCI Specification,
    122  * says that 255 means `unknown' or `no connection' to the interrupt
    123  * controller on a PC.
    124  */
    125 #define	X86_PCI_INTERRUPT_LINE_NO_CONNECTION	0xff
    126 
    127 void pci_device_foreach(pci_chipset_tag_t, int,
    128 			void (*)(pci_chipset_tag_t, pcitag_t, void*),
    129 			void *);
    130 
    131 void pci_device_foreach_min(pci_chipset_tag_t, int, int,
    132 			    void (*)(pci_chipset_tag_t, pcitag_t, void*),
    133 			    void *);
    134 
    135 void pci_bridge_foreach(pci_chipset_tag_t, int, int,
    136 	void (*) (pci_chipset_tag_t, pcitag_t, void *), void *);
    137 
    138 void pci_mmio_range_infer(pci_chipset_tag_t, int, int, bus_addr_t *,
    139     bus_size_t *);
    140 
    141 #endif /* _X86_PCI_MACHDEP_COMMON_H_ */
    142