source: rtems/c/src/lib/libbsp/powerpc/shared/bootloader/pci.h @ 991a3cc1

4.115
Last change on this file since 991a3cc1 was 65c6425, checked in by Joel Sherrill <joel.sherrill@…>, on 05/03/12 at 17:24:46

Remove CVS Id Strings (manual edits after script)

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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 */
22struct 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 */
41struct 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
75struct 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 */
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