RTEMS: bsps/powerpc/motorola_powerpc/bootloader/pci.h Source File

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pci.h
1/*
2 * PCI defines and function prototypes
3 * Copyright 1994, Drew Eckhardt
4 * Copyright 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
5 *
6 * For more information, please consult the following manuals (look at
7 * http://www.pcisig.com/ for how to get them):
8 *
9 * PCI BIOS Specification
10 * PCI Local Bus Specification
11 * PCI to PCI Bridge Specification
12 * PCI System Design Guide
13 */
14
15#ifndef BOOTLOADER_PCI_H
16#define BOOTLOADER_PCI_H
17
18#include <rtems/pci.h>
19
20
21/* Functions used to access pci configuration space */
22 struct pci_bootloader_config_access_functions {
23 int (*read_config_byte)(unsigned char, unsigned char,
24 unsigned char, uint8_t *);
25 int (*read_config_word)(unsigned char, unsigned char,
26 unsigned char, uint16_t *);
27 int (*read_config_dword)(unsigned char, unsigned char,
28 unsigned char, uint32_t *);
29 int (*write_config_byte)(unsigned char, unsigned char,
30 unsigned char, uint8_t);
31 int (*write_config_word)(unsigned char, unsigned char,
32 unsigned char, uint16_t);
33 int (*write_config_dword)(unsigned char, unsigned char,
34 unsigned char, uint32_t);
35};
36
37/*
38 * There is one pci_dev structure for each slot-number/function-number
39 * combination:
40 */
41 struct pci_dev {
42 struct pci_bus *bus; /* bus this device is on */
43 struct pci_dev *sibling; /* next device on this bus */
44 struct pci_dev *next; /* chain of all devices */
45
46 void *sysdata; /* hook for sys-specific extension */
47 struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
48
49 unsigned int devfn; /* encoded device & function index */
50 unsigned short vendor;
51 unsigned short device;
52 unsigned int class; /* 3 bytes: (base,sub,prog-if) */
53 unsigned int hdr_type; /* PCI header type */
54 unsigned int master : 1; /* set if device is master capable */
55 /*
56 * In theory, the irq level can be read from configuration
57 * space and all would be fine. However, old PCI chips don't
58 * support these registers and return 0 instead. For example,
59 * the Vision864-P rev 0 chip can uses INTA, but returns 0 in
60 * the interrupt line and pin registers. pci_init()
61 * initializes this field with the value at PCI_INTERRUPT_LINE
62 * and it is the job of pcibios_fixup() to change it if
63 * necessary. The field must not be 0 unless the device
64 * cannot generate interrupts at all.
65 */
66 unsigned int irq; /* irq generated by this device */
67
68 /* Base registers for this device, can be adjusted by
69 * pcibios_fixup() as necessary.
70 */
71 unsigned long base_address[6];
72 unsigned long rom_address;
73};
74
75 struct pci_bus {
76 struct pci_bus *parent; /* parent bus this bridge is on */
77 struct pci_bus *children; /* chain of P2P bridges on this bus */
78 struct pci_bus *next; /* chain of all PCI buses */
79
80 struct pci_dev *self; /* bridge device as seen by parent */
81 struct pci_dev *devices; /* devices behind this bridge */
82
83 void *sysdata; /* hook for sys-specific extension */
84 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
85
86 unsigned char number; /* bus number */
87 unsigned char primary; /* number of primary bridge */
88 unsigned char secondary; /* number of secondary bridge */
89 unsigned char subordinate; /* max number of subordinate buses */
90};
91
92extern struct pci_bus pci_root; /* root bus */
93extern struct pci_dev *pci_devices; /* list of all devices */
94
95#endif /* BOOTLOADER_PCI_H */
pci.h
device
Definition: rtemscompat1.h:15
pci_bootloader_config_access_functions
Definition: pci.h:22
pci_bus
Definition: pci.h:75
pci_dev
Definition: pci.h:41