diff options
Diffstat (limited to 'bsps/powerpc/motorola_powerpc/bootloader/pci.h')
| -rw-r--r-- | bsps/powerpc/motorola_powerpc/bootloader/pci.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/bsps/powerpc/motorola_powerpc/bootloader/pci.h b/bsps/powerpc/motorola_powerpc/bootloader/pci.h new file mode 100644 index 0000000000..4281a13090 --- /dev/null +++ b/bsps/powerpc/motorola_powerpc/bootloader/pci.h @@ -0,0 +1,95 @@ +/* + * 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 */ |