1/*	$OpenBSD: pci_machdep.h,v 1.32 2020/06/17 06:17:19 dlg 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 */
49union 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
58extern struct bus_dma_tag pci_bus_dma_tag;
59
60/*
61 * Types provided to machine-independent PCI code
62 */
63typedef void *pci_chipset_tag_t;
64typedef union i386_pci_tag_u pcitag_t;
65
66typedef
67struct {
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 */
77extern int pci_mode;
78int		pci_mode_detect(void);
79
80extern struct extent *pciio_ex;
81extern struct extent *pcimem_ex;
82extern struct extent *pcibus_ex;
83void		pci_init_extents(void);
84
85/*
86 * Functions provided to machine-independent PCI code.
87 */
88void		pci_attach_hook(struct device *, struct device *,
89		    struct pcibus_attach_args *);
90int		pci_bus_maxdevs(pci_chipset_tag_t, int);
91pcitag_t	pci_make_tag(pci_chipset_tag_t, int, int, int);
92int		pci_conf_size(pci_chipset_tag_t, pcitag_t);
93pcireg_t	pci_conf_read(pci_chipset_tag_t, pcitag_t, int);
94void		pci_conf_write(pci_chipset_tag_t, pcitag_t, int,
95		    pcireg_t);
96struct pci_attach_args;
97int		pci_intr_map_msi(struct pci_attach_args *, pci_intr_handle_t *);
98int		pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
99#define		pci_intr_line(c, ih)	((ih).line)
100const char	*pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t);
101void		*pci_intr_establish(pci_chipset_tag_t, pci_intr_handle_t,
102		    int, int (*)(void *), void *, const char *);
103void		*pci_intr_establish_cpu(pci_chipset_tag_t, pci_intr_handle_t,
104		    int, struct cpu_info *,
105		    int (*)(void *), void *, const char *);
106void		pci_intr_disestablish(pci_chipset_tag_t, void *);
107void		pci_decompose_tag(pci_chipset_tag_t, pcitag_t,
108		    int *, int *, int *);
109#define	pci_probe_device_hook(c, a)	(0)
110
111void 		pci_dev_postattach(struct device *, struct pci_attach_args *);
112
113pcireg_t	pci_min_powerstate(pci_chipset_tag_t, pcitag_t);
114void		pci_set_powerstate_md(pci_chipset_tag_t, pcitag_t, int, int);
115
116void		pci_mcfg_init(bus_space_tag_t, bus_addr_t, int, int, int);
117pci_chipset_tag_t pci_lookup_segment(int);
118
119static inline int
120pci_intr_map_msix(struct pci_attach_args *pa, int vec, pci_intr_handle_t *ihp)
121{
122	return -1;
123}
124
125/*
126 * Section 6.2.4, `Miscellaneous Functions' of the PIC Specification,
127 * says that 255 means `unknown' or `no connection' to the interrupt
128 * controller on a PC.
129 */
130#define	I386_PCI_INTERRUPT_LINE_NO_CONNECTION	0xff
131
132/*
133 * PCI address space is shared with ISA, so avoid legacy ISA I/O
134 * registers.
135 */
136#define PCI_IO_START	0x400
137#define PCI_IO_END	0xffff
138
139/*
140 * Avoid the DOS Compatibility Memory area.
141 */
142#define PCI_MEM_START	0x100000
143