1 /* $OpenBSD: pci_machdep.h,v 1.11 2002/03/14 03:15:54 millert Exp $ */
2 /* $NetBSD: pci_machdep.h,v 1.7 1997/06/06 23:29:18 thorpej Exp $ */
3
4 /*
5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
6 * Copyright (c) 1994 Charles Hannum. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles Hannum.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Machine-specific definitions for PCI autoconfiguration.
36 */
37
38 /*
39 * i386-specific PCI structure and type definitions.
40 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
41 *
42 * Configuration tag; created from a {bus,device,function} triplet by
43 * pci_make_tag(), and passed to pci_conf_read() and pci_conf_write().
44 * We could instead always pass the {bus,device,function} triplet to
45 * the read and write routines, but this would cause extra overhead.
46 *
47 * Mode 2 is historical and deprecated by the Revision 2.0 specification.
48 */
49 union i386_pci_tag_u {
50 u_int32_t mode1;
51 struct {
52 u_int16_t port;
53 u_int8_t enable;
54 u_int8_t forward;
55 } mode2;
56 };
57
58 extern struct i386_bus_dma_tag pci_bus_dma_tag;
59
60 /*
61 * Types provided to machine-independent PCI code
62 */
63 typedef void *pci_chipset_tag_t;
64 typedef union i386_pci_tag_u pcitag_t;
65
66 typedef
67 struct {
68 pcitag_t tag;
69 int line, pin;
70 void *link;
71 } pci_intr_handle_t;
72
73 /*
74 * i386-specific PCI variables and functions.
75 * NOT TO BE USED DIRECTLY BY MACHINE INDEPENDENT CODE.
76 */
77 extern int pci_mode;
78 int pci_mode_detect(void);
79
80 /*
81 * Functions provided to machine-independent PCI code.
82 */
83 void pci_attach_hook(struct device *, struct device *,
84 struct pcibus_attach_args *);
85 int pci_bus_maxdevs(pci_chipset_tag_t, int);
86 pcitag_t pci_make_tag(pci_chipset_tag_t, int, int, int);
87 pcireg_t pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
88 void pci_conf_write(pci_chipset_tag_t, pcitag_t, int,
89 pcireg_t);
90 struct pci_attach_args;
91 int pci_intr_map(struct pci_attach_args *,
92 pci_intr_handle_t *);
93 #define pci_intr_line(ih) ((ih).line)
94 const char *pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t);
95 void *pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t,
96 int, int (*)(void *), void *, char *);
97 void pci_intr_disestablish(pci_chipset_tag_t, void *);
98 void pci_decompose_tag(pci_chipset_tag_t, pcitag_t,
99 int *, int *, int *);
100
101 /*
102 * Section 6.2.4, `Miscellaneous Functions' of the PIC Specification,
103 * says that 255 means `unknown' or `no connection' to the interrupt
104 * controller on a PC.
105 */
106 #define I386_PCI_INTERRUPT_LINE_NO_CONNECTION 0xff