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/*
* $Id$
*
* PCI defines and function prototypes
* Copyright 1994, Drew Eckhardt
* Copyright 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
*
* For more information, please consult the following manuals (look at
* http://www.pcisig.com/ for how to get them):
*
* PCI BIOS Specification
* PCI Local Bus Specification
* PCI to PCI Bridge Specification
* PCI System Design Guide
*/
#ifndef BOOTLOADER_PCI_H
#define BOOTLOADER_PCI_H
#include <rtems/pci.h>
/* Functions used to access pci configuration space */
struct pci_bootloader_config_access_functions {
int (*read_config_byte)(unsigned char, unsigned char,
unsigned char, uint8_t *);
int (*read_config_word)(unsigned char, unsigned char,
unsigned char, uint16_t *);
int (*read_config_dword)(unsigned char, unsigned char,
unsigned char, uint32_t *);
int (*write_config_byte)(unsigned char, unsigned char,
unsigned char, uint8_t);
int (*write_config_word)(unsigned char, unsigned char,
unsigned char, uint16_t);
int (*write_config_dword)(unsigned char, unsigned char,
unsigned char, uint32_t);
};
/*
* There is one pci_dev structure for each slot-number/function-number
* combination:
*/
struct pci_dev {
struct pci_bus *bus; /* bus this device is on */
struct pci_dev *sibling; /* next device on this bus */
struct pci_dev *next; /* chain of all devices */
void *sysdata; /* hook for sys-specific extension */
struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
unsigned int devfn; /* encoded device & function index */
unsigned short vendor;
unsigned short device;
unsigned int class; /* 3 bytes: (base,sub,prog-if) */
unsigned int hdr_type; /* PCI header type */
unsigned int master : 1; /* set if device is master capable */
/*
* In theory, the irq level can be read from configuration
* space and all would be fine. However, old PCI chips don't
* support these registers and return 0 instead. For example,
* the Vision864-P rev 0 chip can uses INTA, but returns 0 in
* the interrupt line and pin registers. pci_init()
* initializes this field with the value at PCI_INTERRUPT_LINE
* and it is the job of pcibios_fixup() to change it if
* necessary. The field must not be 0 unless the device
* cannot generate interrupts at all.
*/
unsigned int irq; /* irq generated by this device */
/* Base registers for this device, can be adjusted by
* pcibios_fixup() as necessary.
*/
unsigned long base_address[6];
unsigned long rom_address;
};
struct pci_bus {
struct pci_bus *parent; /* parent bus this bridge is on */
struct pci_bus *children; /* chain of P2P bridges on this bus */
struct pci_bus *next; /* chain of all PCI buses */
struct pci_dev *self; /* bridge device as seen by parent */
struct pci_dev *devices; /* devices behind this bridge */
void *sysdata; /* hook for sys-specific extension */
struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
unsigned char number; /* bus number */
unsigned char primary; /* number of primary bridge */
unsigned char secondary; /* number of secondary bridge */
unsigned char subordinate; /* max number of subordinate buses */
};
extern struct pci_bus pci_root; /* root bus */
extern struct pci_dev *pci_devices; /* list of all devices */
#endif /* BOOTLOADER_PCI_H */
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