PCI Configuration Space

PCI configuration space. More...

Collaboration diagram for PCI Configuration Space:

Detailed Description

PCI configuration space.

Id like to use the PCI Firmware Specification as a reference for this, but unfortunately, its not freely available. So we use the OSDev Wiki instead.

See also

OSDev PCI

OSDev PCI Express

Data Structures
struct	pci_config_bar_t
	PCI-e Configuration Space Base Address Allocation Structure. More...
struct	mcfg_t
	PCI Express Memory-mapped Configuration. More...

Typedefs
typedef uint16_t	pci_segment_group_t
	PCI Segment Group Type.
typedef uint8_t	pci_bus_t
	PCI Bus Type.
typedef uint8_t	pci_slot_t
	PCI Slot Type.
typedef uint8_t	pci_function_t
	PCI Function Type.

Functions
uint8_t	pci_config_read8 (pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function, uint16_t offset)
	Read a byte from PCI configuration space.
uint16_t	pci_config_read16 (pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function, uint16_t offset)
	Read a word from PCI configuration space.
uint32_t	pci_config_read32 (pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function, uint16_t offset)
	Read a dword from PCI configuration space.
void	pci_config_write8 (pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function, uint16_t offset, uint8_t value)
	Write a byte to PCI configuration space.
void	pci_config_write16 (pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function, uint16_t offset, uint16_t value)
	Write a word to PCI configuration space.
void	pci_config_write32 (pci_segment_group_t segmentGroup, pci_bus_t bus, pci_slot_t slot, pci_function_t function, uint16_t offset, uint32_t value)
	Write a dword to PCI configuration space.

Typedef Documentation

pci_segment_group_t

typedef uint16_t pci_segment_group_t

PCI Segment Group Type.

Definition at line 24 of file config.h.

pci_bus_t

typedef uint8_t pci_bus_t

PCI Bus Type.

Definition at line 29 of file config.h.

pci_slot_t

typedef uint8_t pci_slot_t

PCI Slot Type.

Definition at line 34 of file config.h.

pci_function_t

typedef uint8_t pci_function_t

PCI Function Type.

Definition at line 39 of file config.h.

Function Documentation

pci_config_read8()

uint8_t pci_config_read8	(	pci_segment_group_t	segmentGroup,
		pci_bus_t	bus,
		pci_slot_t	slot,
		pci_function_t	function,
		uint16_t	offset
	)

Read a byte from PCI configuration space.

Parameters

segmentGroup	Segment group number
bus	Bus number
slot	Slot number
function	Function number
offset	Offset within the configuration space

Returns

Byte read from the configuration space

Definition at line 103 of file config.c.

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pci_config_read16()

uint16_t pci_config_read16	(	pci_segment_group_t	segmentGroup,
		pci_bus_t	bus,
		pci_slot_t	slot,
		pci_function_t	function,
		uint16_t	offset
	)

Read a word from PCI configuration space.

Parameters

segmentGroup	Segment group number
bus	Bus number
slot	Slot number
function	Function number
offset	Offset within the configuration space

Returns

Word read from the configuration space

Definition at line 119 of file config.c.

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pci_config_read32()

uint32_t pci_config_read32	(	pci_segment_group_t	segmentGroup,
		pci_bus_t	bus,
		pci_slot_t	slot,
		pci_function_t	function,
		uint16_t	offset
	)

Read a dword from PCI configuration space.

Parameters

segmentGroup	Segment group number
bus	Bus number
slot	Slot number
function	Function number
offset	Offset within the configuration space

Returns

DWord read from the configuration space

Definition at line 135 of file config.c.

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pci_config_write8()

void pci_config_write8	(	pci_segment_group_t	segmentGroup,
		pci_bus_t	bus,
		pci_slot_t	slot,
		pci_function_t	function,
		uint16_t	offset,
		uint8_t	value
	)

Write a byte to PCI configuration space.

Parameters

segmentGroup	Segment group number
bus	Bus number
slot	Slot number
function	Function number
offset	Offset within the configuration space
value	Byte value to write

Definition at line 151 of file config.c.

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pci_config_write16()

void pci_config_write16	(	pci_segment_group_t	segmentGroup,
		pci_bus_t	bus,
		pci_slot_t	slot,
		pci_function_t	function,
		uint16_t	offset,
		uint16_t	value
	)

Write a word to PCI configuration space.

Parameters

segmentGroup	Segment group number
bus	Bus number
slot	Slot number
function	Function number
offset	Offset within the configuration space
value	Word value to write

Definition at line 161 of file config.c.

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pci_config_write32()

void pci_config_write32	(	pci_segment_group_t	segmentGroup,
		pci_bus_t	bus,
		pci_slot_t	slot,
		pci_function_t	function,
		uint16_t	offset,
		uint32_t	value
	)

Write a dword to PCI configuration space.

Parameters

segmentGroup	Segment group number
bus	Bus number
slot	Slot number
function	Function number
offset	Offset within the configuration space
value	DWord value to write

Definition at line 176 of file config.c.

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