xpciepsu.c File Reference

Overview

Implements all of functions for psu_pci IP driver except interrupts and initialization.

MODIFICATION HISTORY:

Ver   Who  Date     Changes


1.0     bs      08/21/2018      First release

Functions
u32	XPciePsu_ComposeExternalConfigAddress (u8 Bus, u8 Device, u8 Function, u16 Offset)
	This function Composes configuration space location. More...
u8	XPciePsu_ReadConfigSpace (XPciePsu *InstancePtr, u8 Bus, u8 Device, u8 Function, u16 Offset, u32 *DataPtr)
	This function read from remote configuration space location. More...
u8	XPciePsu_WriteConfigSpace (XPciePsu *InstancePtr, u8 Bus, u8 Device, u8 Function, u16 Offset, u32 Data)
	This function write to remote configuration space location. More...
u8	XPciePsu_EnumerateBus (XPciePsu *InstancePtr)
	This function starts PCIe enumeration. More...
u32	XPciePsu_CfgInitialize (XPciePsu *InstancePtr, XPciePsu_Config *CfgPtr, UINTPTR EffectiveBrgAddress)
	This function initializes the config space and PCIe bridge. More...

Function Documentation

XPciePsu_CfgInitialize()

u32 XPciePsu_CfgInitialize	(	XPciePsu *	InstancePtr,
		XPciePsu_Config *	CfgPtr,
		UINTPTR	EffectiveBrgAddress
	)

This function initializes the config space and PCIe bridge.

Parameters

InstancePtr	pointer to XPciePsu Instance Pointer
CfgPtr	pointer to XPciePsu_Config instrance Pointer.
EffectiveBrgAddress	config brigReg address

Returns

XST_SUCCESS on success err on failure

Referenced by PcieInitRootComplex().

XPciePsu_ComposeExternalConfigAddress()

u32 XPciePsu_ComposeExternalConfigAddress	(	u8	Bus,
		u8	Device,
		u8	Function,
		u16	Offset
	)

This function Composes configuration space location.

Parameters

Bus
Device
Function
Offset

Returns

location address of the composed address

References XPCIEPSU_ECAM_BUS_MASK, XPCIEPSU_ECAM_BUS_SHIFT, XPCIEPSU_ECAM_DEV_MASK, XPCIEPSU_ECAM_DEV_SHIFT, XPCIEPSU_ECAM_FUN_MASK, XPCIEPSU_ECAM_FUN_SHIFT, XPCIEPSU_ECAM_MASK, XPCIEPSU_ECAM_REG_MASK, and XPCIEPSU_ECAM_REG_SHIFT.

Referenced by XPciePsu_WriteConfigSpace().

XPciePsu_EnumerateBus()

u8 XPciePsu_EnumerateBus

(

XPciePsu *

InstancePtr

)

This function starts PCIe enumeration.

Parameters

InstancePtr

pointer to XPciePsu Instance Pointer

Returns

1 if success 0 if fails

XPciePsu_ReadConfigSpace()

u8 XPciePsu_ReadConfigSpace	(	XPciePsu *	InstancePtr,
		u8	Bus,
		u8	Device,
		u8	Function,
		u16	Offset,
		u32 *	DataPtr
	)

This function read from remote configuration space location.

Parameters

InstancePtr	pointer to XPciePsu Instance Pointer
Bus
Device
Function
Offset	location of the address to read data from.
DataPtr	pointer store date available in the offset

Returns

XST_SUCCESS on success XST_FAILURE on failure.

XPciePsu_WriteConfigSpace()

u8 XPciePsu_WriteConfigSpace	(	XPciePsu *	InstancePtr,
		u8	Bus,
		u8	Device,
		u8	Function,
		u16	Offset,
		u32	Data
	)

This function write to remote configuration space location.

Parameters

InstancePtr	pointer to XPciePsu Instance Pointer
Bus
Device
Function
Offset	location of the address to write data.
Data	to be written on to the offset

Returns

XST_SUCCESS on success XST_FAILURE on failure.

References XPciePsu_ComposeExternalConfigAddress().