forked from Imagelibrary/rtems
03e1d8378e
This bootloader is only used by the motorola_powerpc BSP. This patch is a part of the BSP source reorganization. Update #3285.
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
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* PCI defines and function prototypes
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* Copyright 1994, Drew Eckhardt
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* Copyright 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*
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* For more information, please consult the following manuals (look at
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* http://www.pcisig.com/ for how to get them):
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*
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* PCI BIOS Specification
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* PCI Local Bus Specification
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* PCI to PCI Bridge Specification
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* PCI System Design Guide
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*/
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#ifndef BOOTLOADER_PCI_H
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#define BOOTLOADER_PCI_H
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#include <rtems/pci.h>
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/* Functions used to access pci configuration space */
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struct pci_bootloader_config_access_functions {
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int (*read_config_byte)(unsigned char, unsigned char,
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unsigned char, uint8_t *);
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int (*read_config_word)(unsigned char, unsigned char,
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unsigned char, uint16_t *);
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int (*read_config_dword)(unsigned char, unsigned char,
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unsigned char, uint32_t *);
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int (*write_config_byte)(unsigned char, unsigned char,
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unsigned char, uint8_t);
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int (*write_config_word)(unsigned char, unsigned char,
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unsigned char, uint16_t);
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int (*write_config_dword)(unsigned char, unsigned char,
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unsigned char, uint32_t);
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};
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/*
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* There is one pci_dev structure for each slot-number/function-number
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* combination:
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*/
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struct pci_dev {
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struct pci_bus *bus; /* bus this device is on */
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struct pci_dev *sibling; /* next device on this bus */
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struct pci_dev *next; /* chain of all devices */
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void *sysdata; /* hook for sys-specific extension */
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struct proc_dir_entry *procent; /* device entry in /proc/bus/pci */
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unsigned int devfn; /* encoded device & function index */
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unsigned short vendor;
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unsigned short device;
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unsigned int class; /* 3 bytes: (base,sub,prog-if) */
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unsigned int hdr_type; /* PCI header type */
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unsigned int master : 1; /* set if device is master capable */
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/*
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* In theory, the irq level can be read from configuration
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* space and all would be fine. However, old PCI chips don't
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* support these registers and return 0 instead. For example,
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* the Vision864-P rev 0 chip can uses INTA, but returns 0 in
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* the interrupt line and pin registers. pci_init()
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* initializes this field with the value at PCI_INTERRUPT_LINE
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* and it is the job of pcibios_fixup() to change it if
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* necessary. The field must not be 0 unless the device
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* cannot generate interrupts at all.
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*/
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unsigned int irq; /* irq generated by this device */
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/* Base registers for this device, can be adjusted by
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* pcibios_fixup() as necessary.
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*/
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unsigned long base_address[6];
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unsigned long rom_address;
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};
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struct pci_bus {
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struct pci_bus *parent; /* parent bus this bridge is on */
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struct pci_bus *children; /* chain of P2P bridges on this bus */
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struct pci_bus *next; /* chain of all PCI buses */
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struct pci_dev *self; /* bridge device as seen by parent */
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struct pci_dev *devices; /* devices behind this bridge */
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void *sysdata; /* hook for sys-specific extension */
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struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */
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unsigned char number; /* bus number */
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unsigned char primary; /* number of primary bridge */
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unsigned char secondary; /* number of secondary bridge */
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unsigned char subordinate; /* max number of subordinate buses */
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};
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extern struct pci_bus pci_root; /* root bus */
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extern struct pci_dev *pci_devices; /* list of all devices */
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#endif /* BOOTLOADER_PCI_H */
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